JP6954196B2

JP6954196B2 - Roller straightening method and roller straightening equipment for the plate to be straightened

Info

Publication number: JP6954196B2
Application number: JP2018052349A
Authority: JP
Inventors: 比護　剛志; 剛志比護; 五十嵐　一嗣; 一嗣五十嵐; 健吾橋本; 篤史清水; いつか笹原; 泰輔岩城; 大介渡辺; 潤根上
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2017-03-29
Filing date: 2018-03-20
Publication date: 2021-10-27
Anticipated expiration: 2038-03-20
Also published as: JP2018167325A

Description

本発明は、複数本のロールを上下に千鳥状に配置し、そのロール間に被矯正板を通して繰り返し曲げを与えることによって、被矯正板を平坦化するローラレベラにおける被矯正板のローラ矯正方法およびローラ矯正設備に関するものである。 The present invention is a roller straightening method and a roller of a straightening plate in a roller leveler for flattening a straightening plate by arranging a plurality of rolls in a staggered pattern vertically and repeatedly bending the straightened plate between the rolls. It is about orthodontic equipment.

圧延や冷却過程などで発生した被矯正板の平坦度不良を矯正するために、複数本のロールを上下に千鳥状に配置したローラレベラが用いられる。ローラレベラによる矯正作用は、被矯正板の板厚よりも狭い上下ロール間隙に該被矯正板を通板させることで被矯正板に繰り返し曲げを与えることによって、被矯正板を平坦化するものである。以下では、あるロールの頂点と、該ロールの前後ロールの頂点を結ぶ直線との距離を被矯正板の板厚から差し引いたものを該ロールにおけるロール押し込み量と呼ぶ。 A roller leveler in which a plurality of rolls are arranged in a staggered manner vertically is used in order to correct the poor flatness of the plate to be straightened that occurs in the rolling or cooling process. The straightening action by the roller leveler is to flatten the straightened plate by repeatedly bending the straightened plate by passing the straightened plate through the upper and lower roll gaps narrower than the plate thickness of the straightened plate. .. Hereinafter, the amount obtained by subtracting the distance between the apex of a certain roll and the straight line connecting the apex of the front and rear rolls of the roll from the thickness of the plate to be straightened is referred to as a roll pushing amount in the roll.

通常、ロール押し込み量は入側から出側に向けて漸減するように設定される。しかしながら、最入側ロール近傍では、被矯正板に対する拘束力が小さいので、被矯正板に付与される曲率の大きさは入側から数本目（通常は、３本目あるいは４本目と言われている）で最大となり、出側に向けて漸減する。このとき、以下では、被矯正板に付与される曲率の最大値を該被矯正板の降伏曲率で除した値を最大加工度と呼ぶ。 Normally, the roll pushing amount is set to gradually decrease from the entry side to the exit side. However, since the binding force on the plate to be straightened is small in the vicinity of the roll on the innermost side, the magnitude of the curvature given to the plate to be straightened is said to be the third or fourth from the entrance side (usually, the third or fourth roll). ) Is the maximum, and gradually decreases toward the exit side. At this time, in the following, the value obtained by dividing the maximum value of the curvature given to the plate to be straightened by the yield curvature of the plate to be straightened is referred to as the maximum workability.

一般には、被矯正板の寸法、材料定数、平坦度やローラレベラの剛性などを考慮して、被矯正板を平坦化するために必要な最大加工度が得られるように、各ロールのロール押し込み量を設定して、ローラ矯正を実施している。 Generally, the roll pushing amount of each roll is obtained so that the maximum processing degree required for flattening the plate to be straightened can be obtained in consideration of the dimensions of the plate to be straightened, the material constant, the flatness, the rigidity of the roller leveler, and the like. Is set and roller correction is carried out.

特許文献１には、ローラ矯正において最大加工度を３以上とすればよいことが示されている。しかしながら、「３以上」という最大加工度の下限値指標はあるものの、個々の被矯正板に対し、具体的にどれだけの最大加工度を与えればよいかは十分にはわかっていない。 Patent Document 1 indicates that the maximum degree of processing may be 3 or more in roller straightening. However, although there is a lower limit index of the maximum degree of processing of "3 or more", it is not fully known how much maximum processing degree should be specifically given to each plate to be straightened.

しかも、一般に、被矯正板のローラ矯正に用いられるロールの胴長は、そのロール径に比べて長いので、矯正反力に伴うロールたわみにより、ロール押し込み量がロール胴長方向（板幅方向）に分布する。このような、ローラ矯正中のロールたわみは、該被矯正板を切断した際の形状不良を招くことも示されている。それゆえ、例えば、特許文献２には、ローラ矯正時のロール押し込み量の板幅方向偏差を最小化することを特徴とする方法が開示されている。以下、本明細書ではローラ矯正時のロール押し込み量の板幅方向偏差を最小化するためのロールベンディングを「矯正反力に伴うロールたわみを補償するためのロールベンディング」という。 Moreover, in general, the body length of the roll used for roller straightening of the plate to be straightened is longer than the roll diameter, so that the roll pushing amount is in the roll body length direction (plate width direction) due to the roll deflection due to the straightening reaction force. It is distributed in. It has also been shown that such roll deflection during roller straightening causes a shape defect when the plate to be straightened is cut. Therefore, for example, Patent Document 2 discloses a method characterized by minimizing the deviation in the plate width direction of the roll pushing amount at the time of roller straightening. Hereinafter, in the present specification, the roll bending for minimizing the deviation in the plate width direction of the roll pushing amount at the time of roller straightening is referred to as "roll bending for compensating for the roll deflection due to the straightening reaction force".

一方、被矯正板のローラ矯正において、あえてローラ矯正時のロール押し込み量を板幅方向に分布させて矯正することにより、被矯正板の平坦度が向上しうることが示されている。例えば、非特許文献１には、胴長方向に径差を設けたロールを組み込んだローラ矯正の実験結果が得られており、ローラ矯正時のロール押し込み量を板幅方向に分布させることでローラ矯正による平坦度改善効果が向上することが示されている。以下、本明細書ではローラ矯正時のロール押し込み量を板幅方向に分布させるためのロールベンディングを「被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング」という。 On the other hand, in the roller straightening of the plate to be straightened, it has been shown that the flatness of the plate to be straightened can be improved by intentionally distributing the roll pushing amount at the time of roller straightening in the plate width direction. For example, Non-Patent Document 1 provides an experimental result of roller straightening incorporating a roll having a diameter difference in the body length direction, and the roller pushing amount at the time of roller straightening is distributed in the plate width direction. It has been shown that the flatness improving effect of the correction is improved. Hereinafter, in the present specification, the roll bending for distributing the roll pushing amount at the time of roller straightening in the plate width direction is referred to as "roll bending for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened".

即ち、中伸びの場合は板幅中央部よりも板幅端部のロール押し込み量が大きくなるように、端伸びの場合には板幅中央部よりも板幅端部のロール押し込み量が小さくなるようにしてローラ矯正すると良い。この点に関し、例えば非特許文献２には、被矯正板に中伸びが生じている場合には板幅中央部の押込み量が小さくなるようにロールを撓ませて矯正を行い、被矯正板に耳伸び（耳波）が生じている場合には板幅端部の押込み量が小さくなるようにロールを撓ませて矯正を行う技術が開示されている。 That is, in the case of medium elongation, the roll pushing amount at the plate width end is larger than that at the center of the plate width, and in the case of edge elongation, the roll pushing amount at the plate width end is smaller than that at the center of the plate width. Roller correction should be done in this way. Regarding this point, for example, in Non-Patent Document 2, when the plate to be straightened is stretched in the middle, the roll is bent and straightened so that the amount of pushing in the central portion of the plate width is small, and the plate to be straightened is straightened. Disclosed is a technique for correcting by bending a roll so that the amount of pushing at the end of the plate width is reduced when ear stretching (ear wave) occurs.

なお、ローラ矯正時のロール押し込み量の板幅方向分布を調整する機構としては、上ロール群、および／または、下ロール群のロール胴長方向（板幅方向）の複数箇所に設けられたウェッジ機構や、油圧シリンダ機構、分割バックアップロールの偏芯等の機構が挙げられる。以下では，このようなロール押し込み量の板幅方向分布をロールベンディング量と呼ぶこととする。 As a mechanism for adjusting the distribution of the roll pushing amount in the plate width direction during roller straightening, wedges provided at a plurality of locations in the roll cylinder length direction (plate width direction) of the upper roll group and / or the lower roll group. Examples include a mechanism, a hydraulic cylinder mechanism, and a mechanism such as an eccentricity of a split backup roll. In the following, such a distribution of the roll pushing amount in the plate width direction will be referred to as a roll bending amount.

以上のことから、被矯正板のローラ矯正において、個々の被矯正板に対し、被矯正板に付与する最大加工度の設定や、ロールベンディング量の設定について、容易に実操業に供することのできる先行技術は未だ存在しない。 From the above, in the roller straightening of the plate to be straightened, the setting of the maximum processing degree to be applied to the plate to be straightened and the setting of the roll bending amount for each plate to be straightened can be easily put into actual operation. Prior art does not yet exist.

特開昭５３−８７９６２号公報Japanese Unexamined Patent Publication No. 53-87962 特開２０００−３２６０１２号公報Japanese Unexamined Patent Publication No. 2000-326012

「三菱重工技報」第２１巻第６号（１９８４年）第８６頁〜第９１頁"Mitsubishi Heavy Industries Technical Report" Vol. 21, No. 6 (1984), pp. 86-91 MetallurgicalPlant and Technology international 1999年 vol.22 No.6 p.70〜75MetallurgicalPlant and Technology international 1999 vol.22 No.6 p.70-75

上記したように、従来、被矯正板のローラ矯正において、被矯正板に付与する最大加工度の設定やロールベンディング量の設定に関し、実操業に供することが可能な具体的指標は見当たらず、当該指標に基づくローラ矯正方法が希求されていた。 As described above, conventionally, in the roller straightening of the plate to be straightened, regarding the setting of the maximum processing degree to be applied to the plate to be straightened and the setting of the roll bending amount, no specific index that can be used in actual operation has been found. A roller correction method based on an index has been sought.

上記事情に鑑み、本発明は、被矯正板のローラ矯正において、被矯正板に付与する最大加工度の設定やロールベンディング量の設定に関する具体的指標に基づき、安定的にかつ効率的に平坦度矯正効果が得られる被矯正板のローラ矯正方法を提供することを目的としている。 In view of the above circumstances, the present invention stably and efficiently flatnesses the plate to be straightened based on specific indexes for setting the maximum degree of processing to be applied to the plate to be straightened and the amount of roll bending in roller straightening of the plate to be straightened. It is an object of the present invention to provide a roller straightening method for a plate to be straightened, which can obtain a straightening effect.

上記目的を達成するために、本発明者らは、被矯正板のローラ矯正において、被矯正板の平坦度矯正効果とローラ矯正条件との関係について、数多くの検討を行った。これより、以下の知見を得た。 In order to achieve the above object, the present inventors have conducted a number of studies on the relationship between the flatness correction effect of the plate to be straightened and the roller straightening condition in the roller straightening of the plate to be straightened. From this, the following findings were obtained.

まず、ローラ矯正中のロールベンディング量を、矯正反力に伴うロールたわみを補償するためのロールベンディング量と、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量とに分けて設定してローラ矯正を行うことが好ましいことが判明した。さらに、ローラ矯正における被矯正板の平坦度矯正は、伸びひずみ差の板厚方向分布（表裏面差）に起因する平坦度不良と、伸びひずみ差の板幅方向分布に起因する平坦度不良とに分けて考えることが好ましいことが判明した。 First, the roll bending amount during roller straightening is divided into the roll bending amount for compensating for the roll deflection due to the straightening reaction force and the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction. It was found that it is preferable to set them separately and perform roller straightening. Further, the flatness correction of the plate to be straightened in the roller straightening includes poor flatness due to the distribution of the elongation strain difference in the plate thickness direction (difference between the front and back surfaces) and poor flatness due to the distribution of the elongation strain difference in the plate width direction. It turned out that it is preferable to think separately.

このように分けて考えた場合、伸びひずみ差の板厚方向分布に起因する平坦度不良（例えば、反り）は、ある程度（３程度）の最大加工度を与えることで無害化できるだけでなく、最大加工度に応じて特に出側ロールの押し込み量を適切に設定することにより、平坦化できることを見出した。しかしながら、伸びひずみ差の板幅方向分布に起因する平坦度不良（例えば、中伸びや端伸び）はローラ矯正中に与えた最大加工度に応じて矯正効果が異なり、しかも多パス矯正を実施してもその矯正効果は多パス矯正中の最大加工度で決定されることも見出した。それゆえ、被矯正板の伸びひずみ差の板幅方向分布に応じて求められたローラ矯正中に被矯正板に付与すべき最大加工度が達成可能な場合は、伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値として、該最大加工度を上回る最大加工度が得られる矯正条件にてローラ矯正を実施すればよいことを見出した。一方で、前記最大加工度が達成不可能な場合には，被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定することが有効なことも見出した。これは、伸びひずみが相対的に短い領域のロール押し込み量が大きくなるようにローラ矯正中のロールをたわませることにより、ロール押し込み量の大きい部分ほど被矯正板の長手方向の軌跡長が長くなることで該領域に伸びひずみが与えられる結果、伸びひずみ差の板幅方向分布が小さくなることに起因している。 When considered separately in this way, poor flatness (for example, warpage) due to the distribution of elongation and strain differences in the plate thickness direction can be rendered harmless by giving a maximum degree of processing to some extent (about 3), and also maximum. It has been found that flattening can be achieved by appropriately setting the pushing amount of the output side roll according to the degree of processing. However, poor flatness (for example, medium elongation and edge elongation) due to the distribution of the elongation strain difference in the plate width direction has a different correction effect depending on the maximum processing degree given during roller straightening, and moreover, multi-pass straightening is performed. However, it was also found that the correction effect is determined by the maximum processing degree during multi-pass correction. Therefore, if the maximum degree of processing to be applied to the plate to be straightened can be achieved during roller straightening obtained according to the distribution of the elongation strain difference of the plate to be straightened in the plate width direction, the distribution of the elongation strain difference in the plate width direction It has been found that the roller straightening may be performed under straightening conditions in which the maximum machining degree exceeding the maximum machining degree can be obtained by setting the roll bending amount for imparting the above to a predetermined value close to zero. On the other hand, when the maximum workability cannot be achieved, the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is defined as the distribution of the elongation strain difference of the plate to be straightened in the plate width direction. It was also found that it is effective to set the distribution of the elongation strain difference in the opposite directions in the plate width direction. This is because the roll during roller straightening is bent so that the roll pushing amount in the region where the elongation strain is relatively short is large, so that the larger the roll pushing amount, the longer the trajectory length in the longitudinal direction of the plate to be straightened. As a result, the elongation strain is applied to the region, and as a result, the distribution of the elongation strain difference in the plate width direction becomes smaller.

ただし、伸びひずみ差の板幅方向分布に起因する平坦度不良を矯正するためには、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定することで、あえてロールをたわませてローラ矯正することが有効であるものの、ローラ矯正中のロールたわみは、被矯正板に残留応力を付与することになり、被矯正板を切断した際の形状不良を招く。
そのため、このような場合には、被矯正板の伸びひずみ差の板幅方向分布を付与するために必要なロールベンディング量をゼロに近付けた（ロールたわみを抑制した）矯正パスを追加することが好ましい。 However, in order to correct the flatness defect caused by the distribution of the elongation strain difference in the plate width direction, the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is set to the elongation strain of the plate to be straightened. Although it is effective to bend the roll and perform roller straightening by setting the direction to give the plate width direction distribution of the elongation strain difference in the direction opposite to the plate width direction distribution of the difference, it is during roller correction. The roll deflection applies residual stress to the plate to be straightened, resulting in poor shape when the plate to be straightened is cut.
Therefore, in such a case, it is possible to add a straightening path in which the roll bending amount required for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is close to zero (roll deflection is suppressed). preferable.

一方で、あえてロールをたわませてローラ矯正された被矯正板に対し、矯正パスを追加した場合、追加矯正パス後の被矯正板の伸びひずみ差の板幅方向分布は，該追加矯正パス前よりも拡大（悪化）することがわかった。そのため、たとえばその後の加工において切断を伴わない場合のように、被矯正板自体の平坦度が重視される場合は、矯正パスを追加しないことが好ましい。 On the other hand, when a straightening pass is added to the straightened plate that has been roller-corrected by bending the roll, the distribution of the elongation strain difference of the straightened plate after the additional straightening pass in the plate width direction is the additional straightening pass. It turned out to be larger (worse) than before. Therefore, when the flatness of the plate to be straightened itself is important, for example, when cutting is not involved in the subsequent processing, it is preferable not to add the straightening path.

さらに、被矯正板のローラ矯正においては、伸びひずみ差の板幅方向分布に起因する平坦度不良の解消を優先し、その後、伸びひずみ差の板厚方向分布に起因する平坦度不良を解消すれば良いことが判明した。具体的には、まず、矯正反力に伴うロールたわみを補償するためのロールベンディング量のみを設定し、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とした場合に、ローラ矯正後の被矯正板の伸びひずみ差の板幅方向分布を目標範囲とするために必要な最大加工度をローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布に応じて設定する。なお、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布と、ローラ矯正後の被矯正板の伸びひずみ差の板幅方向分布との比が、ローラ矯正中に被矯正板に付与される最大加工度を引数とする関数を用いて、ローラ矯正中に被矯正板に付与すべき最大加工度を求めてもよい。 Further, in the roller straightening of the plate to be straightened, priority is given to eliminating the flatness defect due to the distribution of the elongation strain difference in the plate width direction, and then eliminating the flatness defect due to the distribution of the elongation strain difference in the plate thickness direction. It turned out to be good. Specifically, first, only the roll bending amount for compensating for the roll deflection due to the straightening reaction force is set, and the roll bending amount for imparting the distribution of the elongation strain difference of the straightened plate in the plate width direction is set to zero. When the values are close to each other, the maximum processing degree required to set the distribution of the elongation strain difference of the plate to be straightened after roller straightening in the plate width direction as the target range is the elongation strain difference of the plate to be straightened before roller straightening. Set according to the distribution in the plate width direction. The ratio of the distribution of the elongation strain difference of the plate to be straightened before the roller straightening in the plate width direction and the distribution of the elongation strain difference of the plate to be straightened after the roller straightening in the plate width direction is given to the plate to be straightened during the roller straightening. The maximum degree of processing to be applied to the plate to be straightened during roller straightening may be obtained by using a function having the maximum degree of processing to be performed as an argument.

また、一般には、被矯正板の伸びひずみ差の板幅方向分布をゼロに近付けることを目標とすれば良いが、その目標範囲（例えば許容範囲であるゼロに近い所定の値）は被矯正板の寸法、用途などにより変化するものであり、例えば、要求される製品の平坦度基準から求めても良い。目標範囲と平坦度との関係は、実験で求めても良く、有限要素法のような数値解析で求めても良い。 Further, in general, the target may be to bring the distribution of the elongation strain difference of the plate to be straightened in the plate width direction close to zero, but the target range (for example, a predetermined value close to zero, which is an allowable range) is the plate to be straightened. It varies depending on the dimensions, applications, etc. of the product, and may be obtained from the required flatness standard of the product, for example. The relationship between the target range and the flatness may be obtained by an experiment or by a numerical analysis such as the finite element method.

このようにして求められた最大加工度が実現可能であった場合には、矯正反力に伴うロールたわみを補償するためのロールベンディング量のみを考え、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近付けた（例えば、ゼロに近い所定の値とした）上で、該最大加工度を上回る最大加工度が得られる矯正条件にてローラ矯正を実施すれば良い。なお、矯正反力を実測し、あるいは、被矯正板の寸法、材料特性、矯正条件等から推定し、一方、ローラ矯正機の剛性をその構造やロール径、ロール胴長等から同定することにより、矯正反力に伴うロールたわみ量を推定することにより、これを補償するために必要なロールベンディング量を設定することができる。あるいは、矯正反力に伴うロールたわみ量を実測することも可能である。 When the maximum workability obtained in this way can be realized, only the roll bending amount for compensating the roll deflection due to the straightening reaction force is considered, and the elongation strain difference of the straightened plate is in the plate width direction. After making the roll bending amount for imparting a distribution close to zero (for example, setting it to a predetermined value close to zero), perform roller straightening under straightening conditions that can obtain a maximum machining degree that exceeds the maximum machining degree. Just do it. The straightening reaction force is actually measured or estimated from the dimensions, material properties, straightening conditions, etc. of the plate to be straightened, while the rigidity of the roller straightening machine is identified from its structure, roll diameter, roll body length, etc. By estimating the amount of roll deflection due to the correction reaction force, the amount of roll bending required to compensate for this can be set. Alternatively, it is also possible to actually measure the amount of roll deflection due to the straightening reaction force.

このとき、たとえばロールベンディング量を全上ロールに一律にしか設定できないなど、各ロールベンディング量をそれぞれ任意の値に設定できないローラレベラも少なくない。このような場合、最後の塑性曲げを付与するロールにおける矯正中のロールたわみを抑制すれば、条切断に伴う反り変形を抑制できることを見出した。また、最大の曲げを付与するロールにおける矯正中のロールたわみを抑制すれば、条切断に伴う横曲がり変形を抑制できることも見出した。 At this time, there are many roller levelers in which each roll bending amount cannot be set to an arbitrary value, for example, the roll bending amount can be set uniformly for all upper rolls. In such a case, it has been found that if the roll deflection during straightening in the roll that imparts the final plastic bending is suppressed, the warp deformation due to the strip cutting can be suppressed. It was also found that if the roll deflection during straightening in the roll that imparts the maximum bending is suppressed, the lateral bending deformation due to the strip cutting can be suppressed.

しかしながら、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布が過大な場合には、過大な最大加工度が必要とされる。また、一般に、被矯正板の板厚が薄いほど、また、被矯正板の強度が高いほど、大きな最大加工度を得るために必要なロール押し込み量は大きくなるが、設備制約などの点で、必ずしも上記最大加工度を得るために必要なロール押し込み量が実現できるとは限らない。このような場合には、矯正反力に伴うロールたわみを補償するためのロールベンディング量に加えて、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定して、あえてロールをたわませてローラ矯正することで、目標とするローラ矯正後の被矯正板の伸びひずみ差の板幅方向分布が達成でき、すなわち、ローラ矯正における平坦度矯正効果が安定的に得られることが判明した。ただし、このとき、ローラ矯正中のロールたわみは、該被矯正板を切断した際の形状不良を招くので、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とする矯正パスを追加することが好ましいことも見出した。 However, when the distribution of the elongation strain difference of the plate to be straightened before roller straightening in the plate width direction is excessive, an excessive maximum processing degree is required. Further, in general, the thinner the plate to be straightened and the stronger the plate to be straightened, the larger the roll pushing amount required to obtain a large maximum processing degree, but in terms of equipment restrictions and the like, It is not always possible to realize the roll pushing amount required to obtain the maximum processing degree. In such a case, in addition to the roll bending amount for compensating for the roll deflection due to the straightening reaction force, the roll bending amount for imparting the distribution of the elongation strain difference of the straightened plate in the plate width direction is used for the straightened plate. After the target roller straightening, by setting the direction to give the board width direction distribution of the elongation strain difference in the direction opposite to the plate width direction distribution of the elongation strain difference of It was found that the distribution of the elongation strain difference of the plate to be straightened in the plate width direction can be achieved, that is, the flatness correction effect in the roller straightening can be stably obtained. However, at this time, the roll deflection during roller straightening causes a shape defect when the plate to be straightened is cut, so the amount of roll bending for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is zero. It was also found that it is preferable to add a correction path having a predetermined value close to.

一方で、あえてロールをたわませてローラ矯正された被矯正板に対し、矯正パスを追加した場合、追加矯正パス後の被矯正板の伸びひずみ差の板幅方向分布は，該追加矯正パス前よりも拡大（悪化）するので、被矯正板自体の平坦度が重視される場合は、矯正パスを追加しないことが好ましいことも見出した。 On the other hand, when a straightening pass is added to the straightened plate that has been roller-corrected by bending the roll, the distribution of the elongation strain difference of the straightened plate after the additional straightening pass in the plate width direction is the additional straightening pass. It is also found that it is preferable not to add a straightening path when the flatness of the plate to be straightened itself is important because it expands (worse) than before.

上述したように、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布に応じて、ロールベンディング形状を制御することで、ローラ矯正後の被矯正板の平坦度を良好にできることが判明した。このとき、伸びひずみが相対的に短い領域のロール押込量が大きくなるようにローラ矯正中のロールをたわませることにより、該領域の被矯正板の長手方向の軌跡長が長くなることで、該領域に伸びひずみが与えられる結果、ローラ矯正後の被矯正板の伸びひずみ差の板幅方向分布が小さくなることを見出した。ここで、被矯正板の長手方向の軌跡長とは、被矯正板に固定した一点がローラ矯正中に通過した空間位置を順次結んで得られる長手方向軌跡に沿う長さを指す。被矯正板の長手方向の軌跡長の評価区間は任意に選択することができるが、例えば、（ｉ−１）番目ロール１^{（ｉ−１）}と（ｉ＋１）番目ロール１^{（ｉ＋１）}との間における被矯正板９の幅方向位置zにおける軌跡長ｌ（ｚ）は、図８に示すように図示される。なお、図８（ｂ）は被矯正板９の矯正の様子を側方から見た説明図である。 As described above, it was found that the flatness of the plate to be straightened after roller straightening can be improved by controlling the roll bending shape according to the distribution of the elongation strain difference of the plate to be straightened before roller straightening in the plate width direction. bottom. At this time, by bending the roll during roller straightening so that the roll pushing amount in the region where the elongation strain is relatively short becomes large, the trajectory length in the longitudinal direction of the plate to be straightened in the region becomes long. As a result of applying elongation strain to the region, it was found that the distribution of the elongation strain difference of the plate to be straightened after roller straightening in the plate width direction becomes small. Here, the longitudinal locus length of the plate to be straightened refers to a length along the longitudinal locus obtained by sequentially connecting the spatial positions where one point fixed to the plate to be straightened has passed during roller straightening. The evaluation section of the trajectory length in the longitudinal direction of the plate to be straightened can be arbitrarily selected. For example, between the (i-1) th roll 1 ^(i-1) and the (i + 1) th roll 1 ^{(i + 1).} The locus length l (z) at the position z in the width direction of the plate 9 to be straightened is shown in FIG. Note that FIG. 8B is an explanatory view of the straightening of the plate 9 to be straightened as viewed from the side.

中伸びの場合は板幅中央部よりも板幅端部のロール押込量が大きくなるように、端伸びの場合には板幅中央部よりも板幅端部のロール押込量が小さくなるようにしてローラ矯正すると良い。また、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布とローラ矯正後の被矯正板の伸びひずみ差の板幅方向分布との偏差は、ローラレベラにおける被矯正板の長手方向軌跡長差率の板幅方向分布と相似であることが判明した。ここで、被矯正板の長手方向軌跡長差率は、板幅方向の任意の位置における被矯正板の通板軌跡長とその平均値との偏差を該平均値で除した値として定義される。つまり、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布を相殺するようなローラレベラにおける長手方向軌跡長差率の板幅方向分布を該被矯正板に付与することが被矯正板の平坦化につながることを見出した。 In the case of medium elongation, the roll pushing amount at the plate width end is larger than that at the center of the plate width, and in the case of edge elongation, the roll pushing amount at the plate width end is smaller than that at the center of the plate width. It is good to correct the roller. Further, the deviation between the distribution of the elongation strain difference of the plate to be straightened before the roller straightening in the plate width direction and the distribution of the elongation strain difference of the plate to be straightened after the roller straightening in the plate width direction is the longitudinal trajectory length of the plate to be straightened in the roller leveler. It was found to be similar to the plate width direction distribution of the difference rate. Here, the longitudinal locus length difference ratio of the plate to be straightened is defined as a value obtained by dividing the deviation between the trajectory length of the plate to be straightened and its average value at an arbitrary position in the plate width direction by the average value. .. That is, it is possible to give the plate to be straightened a distribution in the width direction of the longitudinal locus length difference ratio in the roller leveler that cancels the distribution of the elongation strain difference of the plate to be straightened before the roller straightening. We found that it leads to flattening.

具体的には、まず、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布を測定する。なお、伸びひずみ差の板幅方向分布は、波高さおよび波ピッチの板幅方向分布が測定できれば算出でき、その測定方法は問わない。例えば、定盤の上に板を載せて、手作業で波の高さ、ピッチを直尺で測定して、伸びひずみ差の板幅方向分布を算出しても良い。この結果には、少なからず測定誤差が含まれることもあり、この伸びひずみ差の板幅方向分布を、板幅方向座標を引数とする近似関数で表現することが好ましい。このとき、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布を相殺するような長手方向軌跡長差率の板幅方向分布を付与すれば良いことを鑑みると、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布の近似曲線はロールベンディング形状として表現できる関数形が好ましい。また、特に、ローラ矯正前の伸びひずみ差の板幅方向分布が板幅中心に関して対称でない被矯正板を平坦化するためには、被矯正板の板幅中心位置と、ローラレベラの幅方向中心位置とを適切にずらすことが好ましい。加えて、ローラレベラにおける長手方向軌跡長を各ロール直上および直下を結ぶ直線で評価すれば良い、即ち、上記図８における軌跡長ｌ（ｚ）を、図８（ｂ）内に実線で示されるように、各ロール直上および直下を結ぶ直線で評価すれば良いことも見出した。さらに、被矯正板の平坦度矯正効果は、最大加工度を付与するロール（付与する曲げの大きさが最大となる箇所）において該被矯正板に作用する張力分布の大小に左右されることを明らかにし、これより、ローラレベラにおける長手方向軌跡長を、最大加工度を付与するロールの前後ロール間で評価すれば良いことを見出した。通常、最大加工度を付与するロールは入側から３本目、あるいは、４本目のロールと言われている。このことから、入側から２本目のロールから４本目のロールまで、あるいは、入側から３本目のロールから５本目のロールまでの区間で長手方向軌跡長を評価することが好ましいことを見出した。さらに、上記したような工程を効率的に実施するために、ローラレベラに、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布を測定できる平坦度計と、ローラレベラの幅方向センタ位置に対する被矯正板の板幅センタ位置を調整できるオフセンタ装置と、の少なくとも一方を具備するローラ矯正設備が好ましいことを見出した。 Specifically, first, the distribution in the plate width direction of the elongation strain difference of the plate to be straightened before the roller straightening is measured. The distribution of the elongation strain difference in the plate width direction can be calculated as long as the wave height and the distribution of the wave pitch in the plate width direction can be measured, and the measurement method does not matter. For example, a plate may be placed on a surface plate, and the wave height and pitch may be manually measured with a straightedge to calculate the distribution of the elongation strain difference in the plate width direction. This result may include not a little measurement error, and it is preferable to express the distribution of the elongation strain difference in the plate width direction by an approximate function with the plate width direction coordinates as arguments. At this time, considering that it is sufficient to give the plate width direction distribution of the longitudinal locus length difference ratio so as to cancel the plate width direction distribution of the elongation strain difference of the plate to be straightened before the roller straightening, the cover before the roller straightening. The approximate curve of the distribution of the elongation and strain difference of the straightening plate in the plate width direction is preferably a functional shape that can be expressed as a roll bending shape. Further, in particular, in order to flatten the plate to be straightened in which the distribution of the elongation strain difference before roller straightening in the plate width direction is not symmetrical with respect to the center of the plate width, the plate width center position of the plate to be straightened and the width direction center position of the roller leveler It is preferable to appropriately shift and. In addition, the longitudinal locus length of the roller leveler may be evaluated by a straight line connecting directly above and below each roll, that is, the locus length l (z) in FIG. 8 is shown by a solid line in FIG. 8 (b). We also found that it is sufficient to evaluate with a straight line connecting directly above and below each roll. Further, the flatness correction effect of the plate to be straightened depends on the magnitude of the tension distribution acting on the plate to be straightened in the roll that gives the maximum degree of processing (the place where the magnitude of the bending to be applied is maximum). From this, it was found that the longitudinal locus length in the roller leveler should be evaluated between the front and rear rolls of the rolls that give the maximum degree of machining. Usually, the roll that gives the maximum degree of processing is said to be the third or fourth roll from the entry side. From this, it was found that it is preferable to evaluate the longitudinal locus length in the section from the entry side to the second roll to the fourth roll, or from the entry side to the third roll to the fifth roll. .. Further, in order to efficiently carry out the above-mentioned steps, the roller leveler is provided with a flatness meter capable of measuring the distribution of the elongation strain difference of the plate to be straightened before the roller straightening in the plate width direction, and the roller leveler with respect to the center position in the width direction. It has been found that a roller straightening facility provided with at least one of an off-center device capable of adjusting the plate width center position of the plate to be straightened is preferable.

本発明は上記の知見を基になされたものであって、その要旨は以下のとおりである。
（１）複数本のロールが上下に千鳥状に配置され、ロール押込量の板幅方向分布を調整する機構を有するローラレベラにおいて、当該複数本のロール間に被矯正板を通して繰り返し曲げを与えることによって被矯正板を平坦化する被矯正板のローラ矯正方法であって、ローラ矯正中のロールベンディング量を、矯正反力に伴うロールたわみを補償するためのロールベンディング量と、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量と、の合算として設定することを特徴とする、被矯正板のローラ矯正方法。
（２）前記（１）に記載の被矯正板のローラ矯正方法において、前記矯正反力に伴うロールたわみを補償するためのロールベンディング量は、前記ローラレベラにおいて被矯正板に対し最後の塑性曲げを付与するロールに作用する矯正荷重に基づいて設定されても良い。
（３）前記（１）に記載の被矯正板のローラ矯正方法において、前記矯正反力に伴うロールたわみを補償するためのロールベンディング量は、前記ローラレベラにおいて被矯正板に対し最大の曲げを付与するロールに作用する矯正荷重に基づいて設定されても良い。
（４）前記（１）〜（３）のいずれか一項に記載の被矯正板のローラ矯正方法において、被矯正板の伸びひずみ差の板幅方向分布に応じてローラ矯正中に被矯正板に付与すべき最大加工度を求め、ローラ矯正中に被矯正板に付与すべき最大加工度が達成可能な場合には、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とした上で該最大加工度を上回る最大加工度が得られる矯正条件にてローラ矯正を実施し、ローラ矯正中に被矯正板に付与すべき最大加工度が達成不可能な場合には、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定してローラ矯正を実施しても良い。
（５）前記（４）に記載の被矯正板のローラ矯正方法において、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量がゼロに近い所定の値であるときの、ローラ矯正前の板幅中央における伸びひずみ差と板幅端部における伸びひずみ差との偏差と、ローラ矯正後の板幅中央における伸びひずみ差と板幅端部における伸びひずみ差との偏差との比が、ローラ矯正中に被矯正板に付与される最大加工度を引数とする関数で表現される場合に、当該関数に係る関係式を用いて、被矯正板の伸びひずみ差の板幅方向分布に応じてローラ矯正中に被矯正板に付与すべき最大加工度を求めても良い。
（６）前記（１）に記載の被矯正板のローラ矯正方法において、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルと、被矯正板の前記ローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルと、が相似かつ符号が逆となるようなロール押込量の板幅方向分布に近付けるように、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を設定しても良い。
（７）前記（１）に記載の被矯正板のローラ矯正方法において、被矯正板の板幅センタ位置とローラレベラの幅方向センタ位置とをずらすことで、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルと、該被矯正板の該ローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルと、が相似かつ符号が逆となるようなロール押込量の板幅方向分布に近付けるように、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を設定しても良い。
（８）前記（６）又は（７）に記載の被矯正板のローラ矯正方法において、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルを、板幅方向座標を引数とする近似関数で表現しても良い。
（９）前記（６）又は（７）に記載の被矯正板のローラ矯正方法において、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルの近似関数を、板幅中心をゼロとする板幅方向座標の偶関数で表現しても良い。
（１０）前記（６）又は（７）に記載の被矯正板のローラ矯正方法において、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルの近似関数を、板幅中心をゼロとする板幅方向座標の偶関数と板幅中心をゼロとする板幅方向座標の一次関数との和で表現しても良い。
（１１）前記（６）〜（１０）のいずれかに記載の被矯正板のローラ矯正方法において、被矯正板のローラレベラにおける長手方向軌跡長を、板幅方向位置において、各ロール直上および直下を結ぶ直線で評価しても良い。
（１２）前記（６）〜（１１）のいずれかに記載の被矯正板のローラ矯正方法において、被矯正板のローラレベラにおける長手方向軌跡長を、最大加工度を付与するロールの１本入側のロールから、最大加工度を付与するロールの１本出側のロールまでの区間で評価しても良い。
（１３）前記（６）〜（１２）のいずれかに記載の被矯正板のローラ矯正方法において、被矯正板のローラレベラにおける長手方向軌跡長を、ローラレベラの最入側から２本目のロールから、ローラレベラの最入側から４本目のロールまでの区間で評価しても良い。
（１４）前記（６）〜（１２）のいずれかに記載の被矯正板のローラ矯正方法において、被矯正板のローラレベラにおける長手方向軌跡長を、ローラレベラの最入側から３本目のロールから、ローラレベラの最入側から５本目のロールまでの区間で評価しても良い。
（１５）前記（１）〜（３）のいずれかに記載の被矯正板のローラ矯正方法において、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定してローラ矯正を実施した場合、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とする矯正パスを追加しても良い。
（１６）前記（１）〜（３）のいずれかに記載の被矯正板のローラ矯正方法において、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定してローラ矯正を実施した場合、矯正パスを追加しなくても良い。
（１７）複数本のロールが上下に千鳥状に配置され、ロール押込量の板幅方向分布を調整する機構を有するローラレベラにおいて、当該複数本のロール間に被矯正板を通して繰り返し曲げを与えることによって被矯正板を平坦化するローラ矯正設備であって、ローラ矯正中のロールベンディング量を、矯正反力に伴うロールたわみを補償するためのロールベンディング量と、被矯正板に伸びひずみ差の板幅方向分布を付与するためのロールベンディング量と、の合算として設定する制御を行う制御部と、を具備するローラ矯正設備。
（１８）前記（１７）に記載のローラ矯正設備において、ローラレベラの幅方向センタ位置に対する被矯正板の板幅センタ位置を調整できるオフセンタ装置を更に具備しても良い。
（１９）前記（１７）又は（１８）に記載のローラ矯正設備において、被矯正板の伸びひずみ差の板幅方向分布プロフィルを測定できる平坦度計を更に具備しても良い。
（２０）前記（１９）に記載のローラ矯正設備において、前記平坦度計は、前記ローラレベラの入側に設置されても良い。 The present invention has been made based on the above findings, and the gist thereof is as follows.
(1) In a roller leveler in which a plurality of rolls are arranged in a staggered pattern vertically and has a mechanism for adjusting the distribution of the roll pushing amount in the plate width direction, the rolls are repeatedly bent by passing a plate to be straightened between the plurality of rolls. A roller straightening method for a plate to be straightened that flattens the plate to be straightened. The amount of roll bending during roller straightening is the amount of roll bending to compensate for the roll deflection due to the straightening reaction force, and the elongation strain on the plate to be straightened. A roller straightening method for a plate to be straightened, which is set as a sum of a roll bending amount for imparting a distribution in the plate width direction of the difference.
(2) In the roller straightening method of the plate to be straightened according to the above (1), the amount of roll bending for compensating the roll deflection due to the straightening reaction force is the final plastic bending of the plate to be straightened in the roller leveler. It may be set based on the straightening load acting on the applied roll.
(3) In the roller straightening method for the plate to be straightened according to the above (1), the amount of roll bending for compensating for the roll deflection due to the straightening reaction force gives the maximum bending to the plate to be straightened in the roller leveler. It may be set based on the straightening load acting on the rolling roll.
(4) In the roller straightening method for a plate to be straightened according to any one of (1) to (3) above, the plate to be straightened is being straightened during roller straightening according to the distribution of the elongation strain difference of the plate to be straightened in the plate width direction. When the maximum degree of processing to be applied to the plate to be straightened can be achieved during roller straightening, a roll for imparting a distribution of elongation strain difference in the plate width direction to the plate to be straightened. After setting the bending amount to a predetermined value close to zero, roller straightening is performed under straightening conditions that can obtain a maximum machining degree that exceeds the maximum machining degree, and the maximum machining degree to be given to the plate to be straightened during roller straightening is If it is not achievable, the amount of roll bending for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is the amount of the elongation strain difference in the direction opposite to the distribution of the elongation strain difference of the plate to be straightened in the plate width direction. Roller straightening may be performed by setting the direction to give the plate width direction distribution.
(5) In the roller straightening method of the plate to be straightened according to the above (4), when the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is a predetermined value close to zero. , The deviation between the elongation strain difference at the center of the plate width before roller straightening and the elongation strain difference at the end of the plate width, and the deviation between the elongation strain difference at the center of the plate width after roller straightening and the elongation strain difference at the end of the plate width. When the ratio of is expressed by a function that takes the maximum degree of processing given to the plate to be straightened as an argument during roller straightening, the plate width of the elongation strain difference of the plate to be straightened is used by using the relational expression related to the function. Depending on the direction distribution, the maximum degree of processing to be applied to the plate to be straightened during roller straightening may be obtained.
(6) In the roller straightening method of the plate to be straightened according to the above (1), the distribution profile of the elongation strain difference of the plate to be straightened before the roller straightening and the longitudinal trajectory length difference of the plate to be straightened in the roller leveler. Roll to give the plate to be straightened a distribution of elongation and strain differences in the width direction so that the profile and the distribution of the rate in the width direction are close to the distribution of the roll pushing amount in the direction of the plate width. The bending amount may be set.
(7) In the roller straightening method for the plate to be straightened according to (1) above, by shifting the plate width center position of the straightened plate and the width direction center position of the roller leveler, the elongation strain of the straightened plate before the roller straightening is strained. In the plate width direction distribution of the roll pushing amount so that the plate width direction distribution profile of the difference and the plate width direction distribution profile of the longitudinal locus length difference ratio of the plate to be straightened in the roller leveler are similar and the signs are reversed. The roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened may be set so as to be close to each other.
(8) In the roller straightening method of the plate to be straightened according to the above (6) or (7), the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before the roller straightening is used as an argument in the plate width direction coordinates. It may be expressed by an approximate function.
(9) In the roller straightening method of the plate to be straightened according to the above (6) or (7), the approximate function of the extension strain difference of the plate to be straightened before the roller straightening is set to zero in the plate width direction distribution profile. It may be expressed by an even function of the plate width direction coordinates.
(10) In the roller straightening method of the plate to be straightened according to the above (6) or (7), the approximate function of the extension strain difference of the plate to be straightened before the roller straightening is set to zero in the plate width direction distribution profile. It may be expressed by the sum of the even function of the plate width direction coordinates and the linear function of the plate width direction coordinates where the center of the plate width is zero.
(11) In the roller straightening method for the plate to be straightened according to any one of (6) to (10) above, the longitudinal locus length of the plate to be straightened in the roller leveler is set to directly above and below each roll at the position in the plate width direction. It may be evaluated by a straight line connecting.
(12) In the roller straightening method for a plate to be straightened according to any one of (6) to (11) above, the length of the trajectory in the longitudinal direction of the roller leveler of the plate to be straightened is set to the one-entry side of the roll that gives the maximum degree of processing. The evaluation may be made in the section from the roll of 1 to the roll on the one side of the roll that gives the maximum degree of processing.
(13) In the roller straightening method for the plate to be straightened according to any one of (6) to (12) above, the longitudinal locus length of the plate to be straightened in the roller leveler is set from the second roll from the innermost side of the roller leveler. The evaluation may be made in the section from the innermost side of the roller leveler to the fourth roll.
(14) In the roller straightening method for the plate to be straightened according to any one of (6) to (12) above, the longitudinal locus length of the plate to be straightened in the roller leveler is set from the third roll from the innermost side of the roller leveler. The evaluation may be made in the section from the innermost side of the roller leveler to the fifth roll.
(15) In the roller straightening method of the plate to be straightened according to any one of (1) to (3) above, the amount of roll bending for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is determined by the plate to be straightened. When roller straightening is performed by setting the direction to give the distribution of the elongation strain difference in the direction opposite to the distribution of the elongation strain difference in the plate width direction, the distribution of the elongation strain difference in the plate width direction is applied to the plate to be straightened. A correction path may be added in which the roll bending amount to be imparted is a predetermined value close to zero.
(16) In the roller straightening method of the plate to be straightened according to any one of (1) to (3) above, the amount of roll bending for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is set. When roller straightening is performed by setting the direction in which the distribution of the elongation strain difference in the plate width direction contradictory to the distribution in the plate width direction of the elongation strain difference is set, it is not necessary to add the correction path.
(17) In a roller leveler in which a plurality of rolls are arranged in a staggered pattern vertically and has a mechanism for adjusting the distribution of the roll pushing amount in the plate width direction, the rolls are repeatedly bent by passing a plate to be straightened between the plurality of rolls. It is a roller straightening facility that flattens the plate to be straightened, and the amount of roll bending during roller straightening is the amount of roll bending to compensate for the roll deflection due to the straightening reaction force, and the plate width of the difference in elongation and strain between the plates to be straightened. A roller straightening facility including a roll bending amount for imparting a directional distribution and a control unit for controlling the sum of the roll bending amounts.
(18) In the roller straightening equipment according to (17) above, an off-center device capable of adjusting the plate width center position of the plate to be straightened with respect to the width direction center position of the roller leveler may be further provided.
(19) In the roller straightening equipment according to (17) or (18) above, a flatness meter capable of measuring the distribution profile of the elongation strain difference of the plate to be straightened in the plate width direction may be further provided.
(20) In the roller straightening equipment according to (19), the flatness meter may be installed on the entrance side of the roller leveler.

本発明によれば、ロールベンディング量を、矯正反力に伴うロールたわみの補償項と、伸びひずみ差の板幅方向分布の付与を目的とする項とに分けて設定できるので、従来に比して、より統一的な指針のもと、ロールベンディング量を設定できる。加えて、伸びひずみ差の板幅方向分布を付与するためのロールベンディングを実施すべきか、および／または、被矯正板に付与すべき最大加工度がどの程度か、を具体的に設定できるので、より安定的に目標範囲内の平坦度を実現できる被矯正板のローラ矯正を実現できる。さらに、目標平坦度を達成するために必要な最大加工度をより定量的に把握できるので、より効率的に目標平坦度を達成できる被矯正板のローラ矯正を実現できる。また、該被矯正板を切断した際の形状不良をも抑制できるので、より安定的な製品品質を確保できる被矯正板のローラ矯正を実現できる。 According to the present invention, the roll bending amount can be set separately for a term for compensating for the roll deflection due to the straightening reaction force and a term for the purpose of imparting the distribution of the elongation strain difference in the plate width direction, as compared with the conventional case. Therefore, the roll bending amount can be set based on a more unified guideline. In addition, it is possible to specifically set whether roll bending should be performed to impart the distribution of the elongation strain difference in the plate width direction, and / or what the maximum degree of processing should be imparted to the plate to be straightened. It is possible to realize roller straightening of the plate to be straightened, which can achieve more stable flatness within the target range. Further, since the maximum processing degree required to achieve the target flatness can be grasped more quantitatively, it is possible to realize roller straightening of the plate to be straightened, which can achieve the target flatness more efficiently. In addition, since it is possible to suppress shape defects when the plate to be straightened is cut, it is possible to realize roller straightening of the plate to be straightened, which can ensure more stable product quality.

また、本発明によれば、ロールベンディング量を、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルと該被矯正板の該ローラレベラにおける長手方向軌跡長差率の板幅方向プロフィルとが相似かつ符号が逆になるように設定できるので、従来に比して、より統一的な指針のもと、ローラ矯正条件を設定できる。また、被矯正板のローラ矯正前の伸びひずみ差の板幅方向分布プロフィルと該被矯正板のローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルとの相似度がより高まるので、被矯正板の伸びひずみ差の板幅方向分布プロフィルの自由度に比べて、ローラ矯正機のロールベンディング形状の自由度が乏しい場合にも、被矯正板をより平坦化できる。さらに、ローラ矯正前の被矯正板の伸びひずみ差に測定誤差などが含まれる場合にも安定的に被矯正板を平坦化できる。その上、ローラ矯正機のロールベンディング形状の自由度に合わせてローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルが定量化されるので、より実態に即した被矯正板の平坦化を実現できる。加えて、非対称な伸びひずみ差の板幅方向分布を持つ被矯正板に対しても、効果的な平坦化を実現できる。また、被矯正板のローラレベラにおける長手方向軌跡長を簡便に評価できるので、該被矯正板を平坦化するためのローラ矯正条件をより簡便に設定できる。更には、被矯正板に付与するロールベンディング量およびオフセンタ量の設定に関する具体的指標に基づき、安定的にかつ効率的に平坦度矯正効果が得られるローラ矯正設備が実現される。 Further, according to the present invention, the roll bending amount is determined by the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening and the plate width direction profile of the longitudinal locus length difference ratio of the straightened plate in the roller leveler. Since it can be set so that the sign is similar to and the sign is reversed, the roller correction condition can be set based on a more unified guideline as compared with the conventional case. Further, since the degree of similarity between the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening and the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler of the plate to be straightened is further enhanced, the degree of similarity is further increased. Distribution of the difference in elongation and strain of the plate in the plate width direction Even when the degree of freedom of the roll bending shape of the roller straightener is poor compared to the degree of freedom of the profile, the plate to be straightened can be made flatter. Further, even when the difference in elongation and strain of the plate to be straightened before roller straightening includes a measurement error or the like, the plate to be straightened can be stably flattened. In addition, the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening is quantified according to the degree of freedom of the roll bending shape of the roller straightening machine, so that the flatness of the plate to be straightened is more realistic. Can be realized. In addition, effective flattening can be realized even for a plate to be straightened having an asymmetric distribution of elongation and strain differences in the plate width direction. Further, since the longitudinal locus length of the plate to be straightened in the roller leveler can be easily evaluated, the roller straightening conditions for flattening the plate to be straightened can be set more easily. Further, a roller straightening facility capable of stably and efficiently obtaining a flatness straightening effect is realized based on a specific index relating to the setting of the roll bending amount and the off-center amount applied to the plate to be straightened.

以上のように、本発明によれば、被矯正板のローラ矯正において、従来に比して、より安定的かつ効率的に目標平坦度を達成でき、また、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とする矯正パスを追加した場合は該被矯正板の切断後の形状不良をも抑制できる。一方で、伸びひずみ差の板幅方向分布を付与するためのロールベンディングを実施した場合であっても、矯正パスを追加しないことで、被矯正板の平坦度をより向上させることができる。これにより、個々の被矯正板に対し、最低限の最大加工度および／またはパス数にてローラ矯正を実施できるので、矯正コスト（時間、労力、エネルギ）を最小限に抑制することが可能となり、生産性が向上するという効果も得られる。 As described above, according to the present invention, in the roller straightening of the plate to be straightened, the target flatness can be achieved more stably and efficiently as compared with the conventional case, and the plate having a difference in elongation and strain of the plate to be straightened. When a straightening path is added in which the roll bending amount for imparting the distribution in the width direction is set to a predetermined value close to zero, it is possible to suppress the shape defect of the plate to be straightened after cutting. On the other hand, even when roll bending is performed to impart the distribution of the elongation strain difference in the plate width direction, the flatness of the plate to be straightened can be further improved by not adding the straightening path. As a result, roller straightening can be performed on each plate to be straightened with the minimum maximum processing degree and / or the number of passes, so that straightening cost (time, labor, energy) can be minimized. The effect of improving productivity can also be obtained.

本発明の実施の形態にかかる被矯正板のローラ矯正方法に用いたローラレベラの側面と、矯正設備ラインを表す説明図である。It is explanatory drawing which shows the side surface of the roller leveler used for the roller straightening method of the plate to be straightened which concerns on embodiment of this invention, and the straightening equipment line. ローラレベラの正面概略図である。It is a front schematic view of a roller leveler. 本発明の実施の形態にかかる被矯正板のローラ矯正方法におけるローラ矯正条件設定のフローを示す説明図である。It is explanatory drawing which shows the flow of the roller straightening condition setting in the roller straightening method of the plate to be straightened which concerns on embodiment of this invention. 実施例１における測定結果を示す図である。It is a figure which shows the measurement result in Example 1. FIG. 伸びひずみ差矯正効果と最大加工度との関係を示すグラフである。It is a graph which shows the relationship between the elongation strain difference correction effect and the maximum processing degree. 本発明の実施例５にかかる被矯正板のローラ矯正方法に用いたローラレベラの概念正面図である。It is a conceptual front view of the roller leveler used in the roller straightening method of the plate to be straightened which concerns on Example 5 of this invention. 本発明の実施例８にかかる被矯正板のローラ矯正方法に用いたローラレベラの側面と、矯正設備ラインを表す説明図である。It is explanatory drawing which shows the side surface of the roller leveler used for the roller straightening method of the plate to be straightened which concerns on Example 8 of this invention, and the straightening equipment line. 本発明の明細書における軌跡長の定義を説明する説明図である。It is explanatory drawing explaining the definition of the locus length in the specification of this invention.

以下、本発明の実施の形態について図面を参照して説明する。なお、本明細書および図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複説明を省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

以下、本発明の実施の形態にかかる被矯正板のローラ矯正方法について説明する。図１は本実施の形態にかかる被矯正板のローラ矯正方法において用いられるローラレベラ２０の側面と、矯正設備ラインＬを示す説明図である。また、図２はローラレベラ２０の正面概略図である。ローラレベラ２０は、合計９本のワークロール（以下、単にロールとも記載する）１からなるローラレベラであり、上ロール群３（４本のワークロール１からなる）と下ロール群２（５本のワークロール１からなる）とがそれぞれ等間隔に、千鳥状に配置されている。即ち、上ロールと下ロールは水平方向（図１中左右方向）に伸びる矯正設備ラインＬに対して、互いに上下対象に配置され、ローラレベラ２０の上面から見た際に、上ロールと下ロールの回転軸が互いに同一の位置にこないようにずれた状態となる位置に配置されている。 Hereinafter, the roller straightening method of the plate to be straightened according to the embodiment of the present invention will be described. FIG. 1 is an explanatory view showing a side surface of a roller leveler 20 used in the roller straightening method of a plate to be straightened according to the present embodiment and a straightening equipment line L. Further, FIG. 2 is a schematic front view of the roller leveler 20. The roller leveler 20 is a roller leveler consisting of a total of nine work rolls (hereinafter, also simply referred to as rolls) 1, an upper roll group 3 (consisting of four work rolls 1) and a lower roll group 2 (five works). Roll 1) and are arranged in a staggered pattern at equal intervals. That is, the upper roll and the lower roll are arranged vertically symmetrically with respect to the straightening equipment line L extending in the horizontal direction (horizontal direction in FIG. 1), and when viewed from the upper surface of the roller leveler 20, the upper roll and the lower roll The rotation axes are arranged at positions that are offset so that they do not come to the same position.

５本の下ロール（ワークロール１）からなる下ロール群２は、ハウジング６の内部下面に下ロール群フレーム２ａに組み込まれる構成で配置され、その位置が不動である固定ロール群である。一方、４本の上ロール（ワークロール１）からなる上ロール群３は、ハウジング６内の内部上面に上ロール群フレーム３ａに組み込まれる構成となっている。また、上ロール群フレーム３ａはハウジング６の上面に取り付けられた入側押し込み機構４、出側押し込み機構５に接続するウェッジ調整機構１０に設置されており、ハウジング６の内面上部とウェッジ調整機構１０との間にある入側押し込み装置４と出側押し込み装置５とを用いて、上ロールフレーム３ａを介して、下ロール群フレーム２ａに組み込まれた下ロール群２に対して傾動押し込みを行うことが可能となっている。 The lower roll group 2 composed of five lower rolls (work rolls 1) is a fixed roll group that is arranged on the inner lower surface of the housing 6 so as to be incorporated into the lower roll group frame 2a and whose position is immovable. On the other hand, the upper roll group 3 composed of four upper rolls (work rolls 1) is configured to be incorporated into the upper roll group frame 3a on the inner upper surface of the housing 6. Further, the upper roll group frame 3a is installed in the wedge adjusting mechanism 10 connected to the entry side pushing mechanism 4 and the exit side pushing mechanism 5 attached to the upper surface of the housing 6, and the upper part of the inner surface of the housing 6 and the wedge adjusting mechanism 10 Using the entry-side pushing device 4 and the exit-side pushing device 5 between the two, tilt pushing is performed on the lower roll group 2 incorporated in the lower roll group frame 2a via the upper roll frame 3a. Is possible.

また、図１および図２に示す通り、ローラレベラ２０においては、上ロール群３の上部にはウェッジ調整機構１０が組み込まれている。このウェッジ調整機構１０は、図２に示すように、板幅方向３箇所に設けられており、板幅中央部のウェッジ調整量を板幅端部のウェッジ調整機構の調整量とは異なる値に設定することにより、全上ロール（上ロール群３）一律のロールベンディングを施すこと、つまり、ロール胴長方向のロール押し込み量分布の調整が可能となっている。例えば、図２に示すように、ウェッジ調整機構１０において、板幅方向中央部のものを機構１０ａとし、板幅方向端部のものを機構１０ｃとした場合に、機構１０ａによって、機構１０ｃより大きな調整量（押し込み量）を上ロール群３に対して負荷させることにより、上ロール群３の各上ロールそれぞれの板幅中央部に対応する部分が下に凸となるようにロールベンディングが施され、通板する被矯正板９の板幅端部に比べて板幅中央により大きな押し込み量が負荷されるように調整が可能となっている。ここで、ウェッジ調整機構１０は図１に示すように上ロール群３の全てのワークロール１に対して同時に調整を行う構成となっており、上記板幅中央部に対応する部分が下に凸となるロールベンディングの負荷は上ロール群３の全てのワークロール１に対して行われる。 Further, as shown in FIGS. 1 and 2, in the roller leveler 20, a wedge adjusting mechanism 10 is incorporated in the upper part of the upper roll group 3. As shown in FIG. 2, the wedge adjusting mechanism 10 is provided at three positions in the plate width direction, and the wedge adjusting amount at the center of the plate width is set to a value different from the adjustment amount of the wedge adjusting mechanism at the end of the plate width. By setting, it is possible to perform uniform roll bending of all upper rolls (upper roll group 3), that is, to adjust the roll pushing amount distribution in the roll body length direction. For example, as shown in FIG. 2, in the wedge adjusting mechanism 10, when the one at the center in the plate width direction is the mechanism 10a and the one at the end in the plate width direction is the mechanism 10c, the mechanism 10a is larger than the mechanism 10c. By applying the adjustment amount (pushing amount) to the upper roll group 3, roll bending is performed so that the portion corresponding to the central portion of the plate width of each upper roll of the upper roll group 3 is convex downward. It is possible to adjust so that a larger pushing amount is applied to the center of the plate width than the plate width end portion of the plate to be straightened 9 to be passed through. Here, as shown in FIG. 1, the wedge adjusting mechanism 10 is configured to simultaneously adjust all the work rolls 1 of the upper roll group 3, and the portion corresponding to the central portion of the plate width is convex downward. The roll bending load is applied to all the work rolls 1 of the upper roll group 3.

また、図１に示すように、ローラレベラ２０の入側に平坦度計７が設置してある。平坦度計７がローラレベラ２０の入側に設置されているのは、平坦度の測定を矯正前に実施することで、被矯正板９を逆送させることなく矯正が実施でき、矯正効率の向上が図られるからである。仮に、平坦度計７をローラレベラ２０の出側に設置すると、平坦度測定の後に被矯正板９を矯正のためにローラレベラ２０の入口まで戻す（逆送させる）ことが必要となり非効率である。 Further, as shown in FIG. 1, a flatness meter 7 is installed on the entrance side of the roller leveler 20. The flatness meter 7 is installed on the entrance side of the roller leveler 20 because the flatness is measured before the straightening, so that the straightening can be performed without back-feeding the plate 9 to be straightened, and the straightening efficiency is improved. This is because If the flatness meter 7 is installed on the outlet side of the roller leveler 20, it is inefficient because it is necessary to return (backward) the plate 9 to be straightened to the entrance of the roller leveler 20 for straightening after the flatness measurement.

平坦度計７による測定結果はプロセスコンピュータ８に伝送される。ローラレベラ２０における制御部として機能するプロセスコンピュータ８には、被矯正板９の板厚、板幅、材料特性、伸びひずみ差の板幅方向分布の目標値なども入力され、また、入側押し込み装置４、出側押し込み装置５、および、ウェッジ調整機構１０などの制御量が出力される。この制御部としてのプロセスコンピュータ８は、以下に説明する手順で行われるローラ矯正での様々な制御を行うものであり、例えば、ロールベンディング量の設定等が当該制御部により制御される。 The measurement result by the flatness meter 7 is transmitted to the process computer 8. The process computer 8 that functions as a control unit in the roller leveler 20 is input with the plate thickness, plate width, material characteristics, target value of the elongation strain difference distribution in the plate width direction, and the input side pushing device. 4. The control amount of the exit side pushing device 5 and the wedge adjusting mechanism 10 is output. The process computer 8 as the control unit performs various controls in the roller straightening performed in the procedure described below, and for example, the setting of the roll bending amount and the like are controlled by the control unit.

以上、図１および図２を参照して説明した矯正設備ラインＬ（ローラレベラ２０、プロセスコンピュータ８等）において、以下の手順（ａ）〜（ｆ）でローラ矯正が実施される。なお、この手順は図３にもフローとして説明している。
（ａ）被矯正板９について、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布を求める（定量化する）。ここで、伸びひずみ差は、被矯正板の長手方向に沿う長さとその板幅方向分布の平均値との差を該平均値で除したものとして求める。これは、ローラレベラの入側に設置された平坦度計７により測定されたデータを用いて算出できる。このとき、ローラ矯正前の伸びひずみ差の板幅方向分布を板幅中心をゼロとする板幅方向座標を引数とする近似式で近似することが好ましい。加えて、ローラ矯正前の伸びひずみ差の板幅方向分布の近似式を、板幅中心をゼロとする板幅方向座標の偶関数式、あるいは、板幅中心をゼロとする板幅方向座標の偶関数式と板幅中心をゼロとする板幅方向座標の一次式との和で表現することが好ましい。
（ｂ）被矯正板９について、ローラ矯正前の伸びひずみ差の板幅方向分布に基づき、ローラ矯正後の伸びひずみ差の板幅方向分布の目標値を達成するために必要な最大加工度を計算する。このとき、ローラ矯正前の板幅中央における伸びひずみ差と板幅端部における伸びひずみ差との偏差Δε_ｉｎとローラ矯正後の板幅中央における伸びひずみ差と板幅端部における伸びひずみ差との偏差Δε_Ｏｕｔとの比は、最大加工度Ｋ_ｍａｘを引数とする関係式（以下に示す（式１））を用いる。

（ｃ）被矯正板９について、上記最大加工度を達成するために必要な矯正条件（ロール設定条件）を算出する。このとき、荷重、トルク、あるいは被矯正板の噛み込み限界等の設備制約や材質上の制約等も踏まえ、該最大加工度が実現できるかどうかも判断する。
（ｄ）該最大加工度が実現可能な場合、ウェッジ調整機構１０を調整して矯正反力に伴うロールたわみを補償するためのロールベンディング量を付与することで、矯正反力に伴うロールたわみを補償した上で、該最大加工度を上回る最大加工度が得られる矯正条件にて該被矯正板９のローラ矯正を実施する。矯正反力に伴うロールたわみを補償するためのロールベンディング量は、該被矯正板９に最後に塑性曲げを付与するロールに作用する矯正荷重に基づいて設定しても良い。もしくは、矯正反力に伴うロールたわみを補償するためのロールベンディング量は、該被矯正板９に最大の曲げを付与するロールに作用する矯正荷重に基づいて設定しても良い。
（ｅ）一方、該最大加工度が実現不可能な場合、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定して該被矯正板９のローラ矯正を実施する。このとき、該被矯正板９について、ローラ矯正前の段階で、板幅中央部の伸びひずみよりも板幅端部の伸びひずみのほうが長い場合にはローラ矯正中の板幅中央部のロール押し込み量がローラ矯正中の板幅端部のロール押し込み量よりも大きくなるように、板幅中央部の伸びひずみよりも板幅端部の伸びひずみのほうが短い場合にはローラ矯正中の板幅中央部のロール押し込み量がローラ矯正中の板幅端部のロール押し込み量よりも小さくなるように、それぞれウェッジ調整機構１０を調整して、上ロール群３をたわませて該被矯正板９のローラ矯正を実施する。
ここで、被矯正板９のローラレベラ２０における長手方向軌跡長差率の板幅方向分布プロフィルがローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布プロフィルと相似かつ符号が逆となるロール押込量の板幅方向分布に近づけるロールベンディング量を実現するようにウェッジ調整機構１０を設定する。このとき、特に被矯正板９が板幅中心に関して非対称な伸びひずみ差の板幅方向分布を有する場合は、被矯正板９の板幅センタ位置とローラレベラ２０の幅方向センタ位置とをずらすことで、ローラ矯正前の被矯正板９の伸びひずみ差の板幅方向分布プロフィルと被矯正板９のローラレベラ２０における長手方向軌跡長差率の板幅方向分布プロフィルとの相似度を高めることが好ましい。また、ローラレベラ２０における長手方向軌跡長を各ロール直上および直下を結ぶ直線で評価しても良いし、また、最大加工度を付与するロールの１本入側のロールから、最大加工度を付与するロールの１本出側のロールまでの区間で評価しても良い。また、通常は最大加工度が付与されるロールはローラレベラ２０の最入側から３本目あるいは４本目であると言われていることから、ローラレベラ２０の最入側から２本目のロールから４本目のロールまでの区間、もしくは、ローラレベラ２０の最入側から３本目のロールから５本目のロールまでの区間で評価しても良い。
（ｆ）前記（ｅ）のように被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定してローラ矯正を実施した場合には、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とする矯正パスを追加しても良い。もしくは、前記（ｅ）のように被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定してローラ矯正を実施した場合には、矯正パスを追加しなくても良い。 In the straightening equipment line L (roller leveler 20, process computer 8, etc.) described with reference to FIGS. 1 and 2, roller straightening is performed by the following procedures (a) to (f). This procedure is also described as a flow in FIG.
(A) For the plate 9 to be straightened, the distribution of the elongation strain difference of the plate to be straightened before roller straightening in the plate width direction is obtained (quantified). Here, the elongation strain difference is obtained by dividing the difference between the length along the longitudinal direction of the plate to be straightened and the average value of the distribution in the plate width direction by the average value. This can be calculated using the data measured by the flatness meter 7 installed on the entrance side of the roller leveler. At this time, it is preferable to approximate the distribution of the elongation strain difference before roller straightening in the plate width direction by an approximate expression with the plate width direction coordinates with the center of the plate width as zero as an argument. In addition, the approximate expression of the distribution of the elongation strain difference before roller straightening in the plate width direction is the even function expression of the plate width direction coordinates with the plate width center as zero, or the plate width direction coordinates with the plate width center as zero. It is preferable to express it as the sum of the even function equation and the linear equation of the plate width direction coordinates with the plate width center as zero.
(B) For the plate 9 to be straightened, based on the distribution of the elongation strain difference before roller straightening in the plate width direction, the maximum workability required to achieve the target value of the elongation strain difference distribution in the plate width direction after roller straightening is obtained. calculate. _{At this time, the deviation Δε in} between the elongation strain difference at the center of the plate width before roller straightening and the elongation strain difference at the end of the plate width, the elongation strain difference at the center of the plate width after roller straightening, and the elongation strain difference at the end of the plate width. For the ratio of the deviation Δε _Out , a relational expression ((Equation 1) shown below) with the maximum processing degree K _{max as an argument is used.}

(C) For the plate 9 to be straightened, the straightening conditions (roll setting conditions) necessary to achieve the above maximum workability are calculated. At this time, it is also determined whether or not the maximum workability can be realized in consideration of the load, torque, equipment restrictions such as the biting limit of the plate to be straightened, and material restrictions.
(D) When the maximum processing degree can be realized, the wedge adjusting mechanism 10 is adjusted to provide a roll bending amount for compensating for the roll bending due to the straightening reaction force, thereby causing the roll bending due to the straightening reaction force. After compensation, roller straightening of the plate 9 to be straightened is performed under straightening conditions that can obtain a maximum machining degree exceeding the maximum machining degree. The roll bending amount for compensating for the roll deflection due to the straightening reaction force may be set based on the straightening load acting on the roll that finally imparts plastic bending to the plate 9 to be straightened. Alternatively, the roll bending amount for compensating for the roll deflection due to the straightening reaction force may be set based on the straightening load acting on the roll that imparts the maximum bending to the straightened plate 9.
(E) On the other hand, when the maximum degree of processing cannot be realized, the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is defined as the distribution of the elongation strain difference of the plate to be straightened in the plate width direction. Roller straightening of the plate 9 to be straightened is performed by setting the direction in which the distribution of the elongation strain difference in the opposite directions in the plate width direction is given. At this time, with respect to the plate 9 to be straightened, if the elongation strain at the end of the plate width is longer than the elongation strain at the center of the plate width before the roller straightening, the roll is pushed into the center of the plate width during roller straightening. If the elongation strain at the end of the plate width is shorter than the elongation strain at the center of the plate width so that the amount is larger than the roll pushing amount at the end of the plate width during roller straightening, the center of the plate width during roller straightening. The wedge adjustment mechanism 10 is adjusted so that the roll pushing amount of the portion is smaller than the roll pushing amount of the plate width end portion during roller straightening, and the upper roll group 3 is bent to bend the straightened plate 9. Perform roller correction.
Here, the roll in which the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler 20 of the plate 9 to be straightened is similar to the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening and the sign is reversed. The wedge adjusting mechanism 10 is set so as to realize a roll bending amount that approaches the distribution of the pushing amount in the plate width direction. At this time, especially when the plate 9 to be straightened has an asymmetric distribution of elongation and strain differences with respect to the center of the plate width in the plate width direction, the plate width center position of the plate to be straightened 9 and the width direction center position of the roller leveler 20 can be shifted. It is preferable to increase the degree of similarity between the plate width direction distribution profile of the elongation strain difference of the plate 9 to be straightened before roller straightening and the plate width direction distribution profile of the longitudinal locus length difference ratio of the roller leveler 20 of the plate 9 to be straightened. Further, the longitudinal locus length of the roller leveler 20 may be evaluated by a straight line connecting directly above and below each roll, and the maximum machining degree is given from the roll on the one-entry side of the roll that gives the maximum machining degree. The evaluation may be made in the section up to the roll on the one side of the roll. Further, since it is usually said that the roll to which the maximum processing degree is given is the third or fourth roll from the innermost side of the roller leveler 20, it is the fourth roll from the second roll from the innermost side of the roller leveler 20. The evaluation may be made in the section up to the roll or in the section from the third roll to the fifth roll from the innermost side of the roller leveler 20.
(F) As described in (e) above, the amount of roll bending for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is the elongation strain in the direction opposite to the distribution of the elongation strain difference of the plate to be straightened in the plate width direction. When roller straightening is performed by setting the difference in the plate width direction distribution, the roll bending amount for imparting the plate width direction distribution of the elongation strain difference of the plate to be straightened is a predetermined value close to zero. You may add a correction path to. Alternatively, as described in (e) above, the amount of roll bending for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is the elongation strain difference in the direction opposite to the distribution of the elongation strain difference of the plate to be straightened in the plate width direction. When the roller straightening is performed by setting the plate width direction distribution of the above, it is not necessary to add the straightening path.

以上、本発明の一実施形態におけるローラ矯正の過程を示したが、本実施形態では、ローラ矯正中のロールベンディング量を、矯正反力に伴うロールたわみを補償するためのロールベンディング量と、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量とに分けて設定してローラ矯正を行うので、従来に比して、より統一的にロールベンディング量を設定できるので、効果的に目標範囲内の平坦度を実現できる。加えて、被矯正板のローラ矯正前の伸びひずみ差の板幅方向分布に基づき、ローラ矯正後の伸びひずみ差の板幅方向分布を目標範囲内とするために必要な最大加工度を算出して、これを実現できるローラ矯正条件を設定してロール矯正を行うので、従来に比して、より安定的かつ効率的に目標平坦度を達成できる。 The process of roller straightening in one embodiment of the present invention has been described above. In the present embodiment, the amount of roll bending during roller straightening, the amount of roll bending for compensating for the roll deflection due to the straightening reaction force, and the amount to be covered. Since the roller straightening is performed separately from the roll bending amount for imparting the distribution of the elongation strain difference of the straightening plate in the plate width direction, the roll bending amount can be set more uniformly than in the past. The flatness within the target range can be effectively achieved. In addition, based on the distribution of the elongation strain difference of the plate to be straightened before roller straightening in the plate width direction, the maximum workability required to keep the distribution of the elongation strain difference after roller straightening in the plate width direction within the target range is calculated. Since the roller straightening condition that can realize this is set and the roll straightening is performed, the target flatness can be achieved more stably and efficiently as compared with the conventional case.

また、ローラ矯正中のロールベンディング量を、ローラ矯正前の被矯正板の伸びひずみ差の板幅方向分布を相殺するようなローラレベラ２０における長手方向軌跡長差率を付与するように設定できるので、従来に比して、より統一的に矯正条件を設定でき、その結果、効果的な板の平坦化を実現できる。加えて、板幅中心とローラ矯正機の幅方向中心とをずらすことで、被矯正板９のローラ矯正前の伸びひずみ差の板幅方向分布をより効果的に相殺できるローラレベラ２０における長手方向軌跡長差率プロフィルを設定でき、また、ローラレベラ２０における長手方向軌跡長プロフィルの自由度に応じた最適なロールベンディング量を設定できるので、より効果的に板を平坦化できる。さらに、被矯正板９のローラレベラ２０における長手方向軌跡長を簡便に評価できるので、被矯正板９を平坦化するためのローラ矯正条件をより簡便に設定できる。 Further, since the roll bending amount during roller straightening can be set to give a longitudinal locus length difference ratio in the roller leveler 20 that cancels the distribution in the plate width direction of the elongation strain difference of the plate to be straightened before roller straightening. Compared with the conventional method, the correction conditions can be set more uniformly, and as a result, effective flattening of the plate can be realized. In addition, by shifting the center of the plate width and the center of the roller straightener in the width direction, the longitudinal trajectory of the roller leveler 20 that can more effectively offset the distribution of the elongation strain difference of the plate 9 to be straightened before roller straightening in the plate width direction. Since the length difference rate profile can be set and the optimum roll bending amount can be set according to the degree of freedom of the longitudinal trajectory length profile in the roller leveler 20, the plate can be flattened more effectively. Further, since the longitudinal locus length of the plate 9 to be straightened in the roller leveler 20 can be easily evaluated, the roller straightening conditions for flattening the plate 9 to be straightened can be set more easily.

さらに、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量がゼロに近い所定の値であるときの、ローラ矯正前の伸びひずみ差の板幅方向分布と、ローラ矯正後の伸びひずみ差の板幅方向分布との比を、ローラ矯正中に被矯正板に付与される最大加工度を引数とする関数（関係式）で表現することで、従来に比して、より簡便に、ローラ矯正後の伸びひずみ差の板幅方向分布を目標範囲内とするために必要な最大加工度を算出できる。 Further, when the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is a predetermined value close to zero, the distribution of the elongation strain difference before roller straightening in the plate width direction and the roller straightening By expressing the ratio of the subsequent elongation strain difference to the plate width direction distribution with a function (relational expression) that takes the maximum degree of processing given to the plate to be straightened during roller straightening as an argument, compared to the conventional method, More easily, the maximum workability required to keep the distribution of the elongation strain difference after roller straightening in the plate width direction within the target range can be calculated.

被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量がゼロであるときの、ローラ矯正前の伸びひずみ差の板幅方向分布と、ローラ矯正後の伸びひずみ差の板幅方向分布との比を、ローラ矯正中に被矯正板に付与される最大加工度を引数とする関数（関係式）で表現する場合に、その関数（関係式）は、最大加工度と伸びひずみ差矯正効果との関係に基づき得られる。
図５は、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量がゼロであるときの、伸びひずみ差矯正効果と最大加工度との関係を示すグラフである。ここで、伸びひずみ差矯正効果とは「矯正前の伸びひずみ差／矯正後の伸びひずみ差」で示す値であり、図５に示すデータは「板厚３〜１２ｍｍ、板幅１２００〜４２００ｍｍ、引張強度３００〜１２００ＭＰａの厚鋼板」を用いた実験結果から得られたものである。 When the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is zero, the distribution of the elongation strain difference before roller straightening in the plate width direction and the elongation strain difference plate after roller straightening When the ratio to the distribution in the width direction is expressed by a function (relational expression) that takes the maximum processing degree given to the plate to be straightened as an argument during roller straightening, the function (relational expression) is the maximum processing degree and elongation. Obtained based on the relationship with the strain difference correction effect.
FIG. 5 is a graph showing the relationship between the elongation strain difference correction effect and the maximum workability when the roll bending amount for imparting the plate width direction distribution of the elongation strain difference of the plate to be straightened is zero. Here, the elongation strain difference correction effect is a value indicated by "elongation strain difference before straightening / elongation strain difference after straightening", and the data shown in FIG. 5 is "plate thickness 3 to 12 mm, plate width 1200 to 4200 mm, and so on. It was obtained from the experimental results using a "thick steel plate having a tensile strength of 300 to 1200 MPa".

図５に示すように、最大加工度と伸びひずみ差矯正効果との間には強い相関関係があり、最大加工度を大きくする程、伸びひずみ差矯正効果の値が小さくなる、即ち、矯正効果が大きくなり平坦度が良化するとの傾向が読み取れる。このような関係性に基づき、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量がゼロに近い所定の値であるときの、ローラ矯正前の伸びひずみ差の板幅方向分布と、ローラ矯正後の伸びひずみ差の板幅方向分布との比が、ローラ矯正中に被矯正板に付与される最大加工度を引数とする関数（関係式）で表現され、好適な最大加工度の計算が可能となる。 As shown in FIG. 5, there is a strong correlation between the maximum processing degree and the elongation strain difference correction effect, and the larger the maximum processing degree, the smaller the value of the elongation strain difference correction effect, that is, the correction effect. It can be seen that there is a tendency for the flatness to improve as the flatness increases. Based on such a relationship, the plate width of the elongation strain difference before roller straightening when the roll bending amount for imparting the plate width direction distribution of the elongation strain difference of the plate to be straightened is a predetermined value close to zero. The ratio of the directional distribution to the plate width direction distribution of the elongation strain difference after roller straightening is expressed by a function (relational expression) with the maximum degree of processing given to the plate to be straightened as an argument, which is preferable. The maximum processing degree can be calculated.

また、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とする矯正パスを追加した場合は該被矯正板の切断後の形状不良をも抑制できる。一方で、伸びひずみ差の板幅方向分布を付与するためのロールベンディングを実施した場合であっても、矯正パスを追加しないことで、被矯正板の平坦度をより向上させることができる。これにより、個々の被矯正板に対し、最低限の最大加工度および／またはパス数にてローラ矯正を実施できるので、矯正コスト（時間、労力、エネルギ）を最小限に抑制することが可能となり、生産性が向上するという効果も得られる。 In addition, if a straightening path is added in which the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is a predetermined value close to zero, the shape of the plate to be straightened may be defective after cutting. Can be suppressed. On the other hand, even when roll bending is performed to impart the distribution of the elongation strain difference in the plate width direction, the flatness of the plate to be straightened can be further improved by not adding the straightening path. As a result, roller straightening can be performed on each plate to be straightened with the minimum maximum processing degree and / or the number of passes, so that straightening cost (time, labor, energy) can be minimized. The effect of improving productivity can also be obtained.

なお、本発明は、その要旨を逸脱しない範囲で種々変更することもできる。例えば、ここでは、被矯正板９の伸びひずみ差の板幅方向分布をローラレベラ２０入側に設置した平坦度計７による実測データに基づいて算出する場合を示したが、ローラ矯正前に被矯正板９を平坦度計７に通板することが困難な場合には、あらかじめ被矯正板９の目視平坦度と伸びひずみ差との関係を定量化しておくことで、作業者の目視により把握することも可能である。また、ここでは、該被矯正板９のローラ矯正前の伸びひずみ差の板幅方向分布に基づき、ローラ矯正後の伸びひずみ差の板幅方向分布を目標範囲内とするために必要な最大加工度を、上記式１を用いて算出する場合を示したが、ローラ矯正前の伸びひずみ差の板幅方向分布とローラ矯正後の伸びひずみ差の板幅方向分布および矯正条件との関係を実験あるいは数値解析に基づいて同定された任意の関係式を用いることも可能である。 The present invention may be modified in various ways without departing from the gist thereof. For example, here, the case where the distribution of the elongation strain difference of the plate 9 to be straightened in the plate width direction is calculated based on the actual measurement data by the flatness meter 7 installed on the roller leveler 20 entry side is shown, but the straightening is performed before the roller straightening. When it is difficult to pass the plate 9 through the flatness meter 7, the relationship between the visual flatness of the plate 9 to be straightened and the difference in elongation strain is quantified in advance so that the plate 9 can be visually grasped by the operator. It is also possible. Further, here, based on the distribution of the elongation strain difference of the plate 9 to be straightened before roller straightening in the plate width direction, the maximum processing required to keep the distribution of the elongation strain difference after roller straightening in the plate width direction within the target range. The case where the degree is calculated using the above formula 1 is shown, but the relationship between the distribution of the elongation strain difference before roller straightening in the plate width direction and the distribution of the elongation strain difference after roller straightening in the plate width direction and the straightening condition is tested. Alternatively, any relational expression identified based on numerical analysis can be used.

また、例えば、その位置が固定された下ロール群２に対し、上ロール群３を傾動して押し込む方式のローラレベラ２０を用いる場合を例示したが、各ロール位置を個別に独立して設定できる方式のローラレベラを用いることも可能である。また、本実施の形態では、ロール胴長方向のロール押込量分布を調整するウェッジ機構１０が板幅方向に３箇所に備えられているローラレベラ２０を用いる場合を説明したが、より多くのウェッジ機構が板幅方向に備えられているローラレベラを用いることも可能である。加えて、本実施の形態では、ロール胴長方向のロール押込量分布の調整をウェッジ機構１０によって行うローラレベラ２０を用いる場合を例示したが、例えば油圧シリンダによるベンディングや分割バックアップロールの偏芯等の機構によってロール胴長方向のロール押し込み量分布の調整が可能なローラレベラを用いることも可能である。もちろん、各ロールに異なるロールベンディング量を設定できるローラレベラにも適用可能である。 Further, for example, a case where a roller leveler 20 of a method of tilting and pushing the upper roll group 3 with respect to the lower roll group 2 whose position is fixed is used has been illustrated, but a method in which each roll position can be set individually and independently. It is also possible to use the roller leveler of. Further, in the present embodiment, the case where the roller leveler 20 provided with the wedge mechanism 10 for adjusting the roll pushing amount distribution in the roll body length direction at three positions in the plate width direction is used has been described, but more wedge mechanisms are used. It is also possible to use a roller leveler provided in the plate width direction. In addition, in the present embodiment, the case of using the roller leveler 20 in which the roll pushing amount distribution in the roll body length direction is adjusted by the wedge mechanism 10 is illustrated, but for example, bending by a hydraulic cylinder, eccentricity of a split backup roll, etc. It is also possible to use a roller leveler whose roll pushing amount distribution in the roll cylinder length direction can be adjusted by a mechanism. Of course, it can also be applied to a roller leveler in which a different roll bending amount can be set for each roll.

以上、本発明の実施の形態の一例を説明したが、本発明は図示の形態に限定されない。当業者であれば、特許請求の範囲に記載された思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 Although an example of the embodiment of the present invention has been described above, the present invention is not limited to the illustrated embodiment. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the ideas described in the claims, which naturally belong to the technical scope of the present invention. It is understood as a thing.

以下、本発明の一実施例について図面に基づいて説明する。なお、以下の実施例で用いられる数値、関数等は、本発明を説明するための一例にすぎず、本発明は以下の実施例に限定されるものではない。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The numerical values, functions, and the like used in the following examples are merely examples for explaining the present invention, and the present invention is not limited to the following examples.

（実施例１）
実施例１として、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板を、図１に示した構成である矯正設備ラインＬにおいて本発明にかかる被矯正板のローラ矯正方法で矯正した。このとき、被矯正板９の板厚、板幅、材料特性、および、伸びひずみ差の板幅方向分布の目標値がプロセスコンピュータ８に伝送、記憶されている。 (Example 1)
As the first embodiment, a roller straightening method for a plate to be straightened according to the present invention in a straightening equipment line L having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. Corrected with. At this time, the plate thickness, plate width, material properties, and target values of the distribution of the elongation strain difference in the plate width direction of the plate 9 to be straightened are transmitted and stored in the process computer 8.

まず、ローラレベラの入側に設置された平坦度計７により、被矯正板９の平坦度データが測定される。測定結果はプロセスコンピュータ８に伝送される。次に、プロセスコンピュータ８を用いて、伸びひずみ差の板幅方向分布が定量化され、該定量化された伸びひずみ差の板幅方向分布に基づき、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値としたときに、ローラ矯正後の伸びひずみ差の板幅方向分布の目標値を達成するために必要な最大加工度を算出するとともに、設備制約等も踏まえ、該最大加工度が実現可能かどうか判断する。 First, the flatness data of the plate 9 to be straightened is measured by the flatness meter 7 installed on the entrance side of the roller leveler. The measurement result is transmitted to the process computer 8. Next, using the process computer 8, the distribution of the elongation-strain difference in the plate width direction is quantified, and based on the quantified distribution of the elongation-strain difference in the plate width direction, the distribution of the elongation-strain difference of the plate to be straightened is in the plate width direction. When the roll bending amount for imparting the distribution is set to a predetermined value close to zero, the maximum workability required to achieve the target value of the distribution of the elongation strain difference after roller straightening in the plate width direction is calculated. , It is judged whether or not the maximum processing degree can be realized in consideration of equipment restrictions and the like.

該最大加工度が実現可能と判断された場合、該最大加工度を実現するための矯正条件をプロセスコンピュータ８にて計算する。このとき、該矯正条件における矯正荷重の予測値などに基づいて、ローラ矯正中のローラレベラの変形、ロールたわみなどの補償を勘案してロール押し込み量およびウェッジ調整量を設定し、ローラレベラの入側押し込み装置４、出側押し込み装置５、および、ウェッジ調整機構１０を調整した上で、被矯正板９を通板してローラ矯正を実施する。このときのローラ矯正は、ローラ矯正中のロールたわみが無くなる方向にウェッジ調整を施すことによって、ロールたわみを抑制している。 When it is determined that the maximum processing degree is feasible, the process computer 8 calculates the correction conditions for achieving the maximum processing degree. At this time, based on the predicted value of the straightening load under the straightening conditions, the roll pushing amount and the wedge adjustment amount are set in consideration of compensation for deformation of the roller leveler during roller straightening, roll deflection, etc., and the roller leveler is pushed into the inlet side. After adjusting the device 4, the exit side pushing device 5, and the wedge adjusting mechanism 10, the plate to be straightened 9 is passed through to perform roller straightening. In the roller straightening at this time, the roll deflection is suppressed by adjusting the wedge in the direction in which the roll deflection during the roller straightening is eliminated.

一方、該被矯正板のローラ矯正前の伸びひずみ差の板幅方向分布が過大な場合や設備制約などで該最大加工度が実現不可能と判断された場合、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を指向する。本実施例１では、材料条件や設備制約によって変動したが、最大加工度の上限は７を与えた。この場合、ローラ矯正前の被矯正板について、板幅中央部の伸びひずみよりも板幅端部の伸びひずみのほうが長いときにはローラ矯正中の板幅中央部のロール押し込み量がローラ矯正中の板幅端部のロール押し込み量よりも大きくなるように、板幅中央部の伸びひずみよりも板幅端部の伸びひずみのほうが短いときにはローラ矯正中の板幅中央部のロール押し込み量がローラ矯正中の板幅端部のロール押し込み量よりも小さくなるように、ウェッジ調整機構１０を調整した上で、ローラ矯正を実行する。このとき、許容範囲内で可能な限り大きな最大加工度が得られるようにローラレベラの入側押し込み装置４、出側押し込み装置５を設定した。 On the other hand, when the distribution of the elongation strain difference of the plate to be straightened before roller straightening is excessive or when it is judged that the maximum workability cannot be realized due to equipment restrictions, etc., the elongation strain difference of the plate to be straightened Orients roller straightening in which the roll bending amount for imparting the plate width direction distribution is set in the direction in which the plate width direction distribution of the elongation strain difference of the plate to be straightened is set in the direction opposite to the plate width direction distribution. .. In the first embodiment, 7 was given as the upper limit of the maximum workability, although it varied depending on the material conditions and equipment restrictions. In this case, for the plate to be straightened before roller straightening, when the elongation strain at the end of the plate width is longer than the elongation strain at the center of the plate width, the roll pushing amount at the center of the plate width during roller straightening is the plate during roller straightening. When the elongation strain at the plate width end is shorter than the elongation strain at the center of the plate width so that it is larger than the roll pushing amount at the width end, the roll pressing amount at the center of the plate width during roller straightening is during roller correction. After adjusting the wedge adjusting mechanism 10 so as to be smaller than the roll pushing amount at the end of the plate width, the roller straightening is performed. At this time, the inlet-side pushing device 4 and the exit-side pushing device 5 of the roller leveler were set so that the maximum machining degree as large as possible could be obtained within the permissible range.

加えて、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を実施した場合には、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値となる方向にウェッジ調整を施すことによって、ローラ矯正中のロールたわみを抑制した矯正パスを追加する。このとき、被矯正板９の伸びひずみ差の板幅方向分布は既に目標範囲を達成できているので、過大な最大加工度を設定する必要はない。本実施例１では追加した矯正パスにおける最大加工度は３を与えた。 In addition, the amount of roll bending for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction is the distribution of the elongation strain difference of the plate to be straightened in the plate width direction opposite to the distribution in the plate width direction. When roller straightening is performed in the direction of applying, wedge adjustment is performed in the direction in which the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction becomes a predetermined value close to zero. By doing so, a correction path that suppresses roll deflection during roller correction is added. At this time, since the distribution of the elongation strain difference of the plate 9 to be straightened in the plate width direction has already achieved the target range, it is not necessary to set an excessive maximum processing degree. In Example 1, the maximum degree of processing in the added correction path was given as 3.

以上説明した条件でもって、鋼板のローラ矯正に本方法を実施した。なお、合計３００本の鋼板を矯正したが、このうち、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値とした場合には、ローラ矯正後の伸びひずみ差の板幅方向分布の目標値を達成するために必要な最大加工度を実現できないと判定された鋼板が８６本存在した。その結果、１枚の被矯正板の平坦度検査を合格させるために必要な矯正パス数の平均値は、図４に示すように、２．２となった。一方、従来の矯正方法において、同様のロールチャンスにおけるこの値は２．８であり、図４に比較しているように、本方法の適用により、ローラ矯正による被矯正板の平坦度矯正が高効率となったことがわかった。加えて、製品平坦度に関する需要家からのクレーム・コンプレイン件数も大きく削減できたことから、本発明にかかる矯正方法の適用により、ローラ矯正による被矯正板の平坦度矯正が安定的になった。 Under the conditions described above, this method was carried out for roller straightening of steel sheets. A total of 300 steel plates were straightened, but when the roll bending amount for imparting the distribution of the elongation strain difference of the plates to be straightened in the plate width direction was set to a predetermined value close to zero, roller straightening was performed. There were 86 steel sheets that were judged to be unable to achieve the maximum workability required to achieve the target value of the later elongation strain difference distribution in the plate width direction. As a result, the average value of the number of straightening passes required to pass the flatness inspection of one plate to be straightened was 2.2 as shown in FIG. On the other hand, in the conventional straightening method, this value in the same roll chance is 2.8, and as compared with FIG. 4, by applying this method, the flatness correction of the plate to be straightened by the roller straightening is high. It turned out to be efficient. In addition, since the number of complaints and complains from consumers regarding product flatness could be significantly reduced, the flatness correction of the plate to be straightened by roller straightening became stable by applying the straightening method according to the present invention. ..

（実施例２）
実施例２として、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板を、図１に示した構成である矯正設備ラインＬにおいて本発明にかかる被矯正板のローラ矯正方法で矯正した。なお、本実施例が対象とする鋼板は、いずれも条切断の上、利用されるものであり、該条切断に伴う反り変形の抑制が強く求められているものである。 (Example 2)
As the second embodiment, a roller straightening method for a plate to be straightened according to the present invention in a straightening equipment line L having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. Corrected with. All of the steel sheets targeted in this embodiment are used after cutting the strips, and there is a strong demand for suppressing warpage deformation due to the cutting of the strips.

実施例１と同様に、被矯正板９の板厚、板幅、材料特性がプロセスコンピュータ８に伝送、記憶されている。また、ローラレベラの入側に設置された平坦度計７により測定された被矯正板９の平坦度データはプロセスコンピュータ８に伝送され、プロセスコンピュータ８を用いて定量化された伸びひずみ差の板幅方向分布に基づき、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値としたときに、ローラ矯正後の伸びひずみ差の板幅方向分布の目標値を達成するために必要な最大加工度を算出するとともに、該最大加工度が実現可能かどうか判断する。該最大加工度が実現可能と判断された場合、該最大加工度を実現するための矯正条件をプロセスコンピュータ８にて計算する。 Similar to the first embodiment, the plate thickness, plate width, and material properties of the plate 9 to be straightened are transmitted and stored in the process computer 8. Further, the flatness data of the plate 9 to be straightened measured by the flatness meter 7 installed on the entrance side of the roller leveler is transmitted to the process computer 8 and the plate width of the elongation strain difference quantified by the process computer 8. Based on the direction distribution, when the roll bending amount for imparting the plate width direction distribution of the elongation strain difference of the plate to be straightened is set to a predetermined value close to zero, the plate width direction distribution of the elongation strain difference after roller straightening The maximum machining degree required to achieve the target value is calculated, and whether or not the maximum machining degree is feasible is determined. When it is determined that the maximum processing degree is feasible, the process computer 8 calculates the correction conditions for achieving the maximum processing degree.

このとき、矯正荷重の予測値などに基づいて、ローラ矯正中のローラレベラの変形、ロールたわみなどの補償を勘案して、ローラレベラの入側押し込み装置４、出側押し込み装置５、および、ウェッジ調整機構１０を調整するが、本実施例では該矯正条件における最後の塑性曲げを付与するロールに作用する荷重に基づいて、該最後の塑性曲げを付与するロールにおけるローラ矯正中のロールたわみが無くなる方向にウェッジ調整を施している。 At this time, based on the predicted value of the straightening load and the like, taking into consideration compensation for deformation of the roller leveler during roller straightening, roll deflection, etc., the roller leveler inlet-side pushing device 4, the exit-side pushing device 5, and the wedge adjusting mechanism 10 is adjusted, but in this embodiment, the roll deflection during roller straightening in the roll that imparts the final plastic bending is eliminated based on the load acting on the roll that imparts the final plastic bending under the straightening conditions. Wedge adjustment is applied.

一方、該被矯正板のローラ矯正前の伸びひずみ差の板幅方向分布が過大な場合や設備制約などで該最大加工度が実現不可能と判断された場合、実施例１と同様にして、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を指向する。ここで、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を実施した場合には、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値となる方向にウェッジ調整を施すことによって、ローラ矯正中のロールたわみを抑制した矯正パスを追加する。このとき、該追加矯正パスにおいては、該矯正条件における最後の塑性曲げを付与するロールに作用する荷重に基づいて、該最後の塑性曲げを付与するロールにおけるローラ矯正中のロールたわみが無くなる方向にウェッジ調整を施している。 On the other hand, when the distribution of the elongation strain difference of the plate to be straightened before roller straightening in the plate width direction is excessive or when it is determined that the maximum workability cannot be realized due to equipment restrictions or the like, the same as in Example 1 is performed. The roll bending amount for imparting the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction is the direction in which the distribution of the elongation-strain difference in the direction opposite to the distribution of the elongation-strain difference of the plate to be straightened is imparted in the plate width direction. Orient the roller correction set to. Here, the roll bending amount for imparting the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction is the plate width direction distribution of the elongation-strain difference in the direction opposite to the distribution of the elongation-strain difference of the plate to be straightened. When roller straightening is performed in the direction of applying, wedge adjustment is performed in the direction in which the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction becomes a predetermined value close to zero. By doing so, a correction path that suppresses roll deflection during roller correction is added. At this time, in the additional straightening pass, the roll deflection during roller straightening in the roll that imparts the final plastic bending is eliminated based on the load acting on the roll that imparts the final plastic bending under the straightening conditions. Wedge adjustment is applied.

以上説明した条件でもって、鋼板のローラ矯正に本方法を実施し、合計１８０本の鋼板を矯正した。その結果、いずれの被矯正板も、その後の需要家における条切断に伴う反り変形は許容範囲に留まり、条切断に伴う反り変形に関する需要家からのクレーム・コンプレインを大きく削減することができた。 Under the conditions described above, this method was carried out for roller straightening of steel sheets, and a total of 180 steel sheets were straightened. As a result, for all the plates to be straightened, the warp deformation due to the subsequent strip cutting by the customer remained within the allowable range, and the complaints and complains from the customer regarding the warp deformation due to the strip cutting could be greatly reduced. ..

（実施例３）
実施例３として、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板を、図１に示した構成である矯正設備ラインＬにおいて本発明にかかる被矯正板のローラ矯正方法で矯正した。なお、本実施例が対象とする鋼板は、いずれも条切断の上、利用されるものであり、該条切断に伴う横曲り変形の抑制が強く求められているものである。 (Example 3)
As Example 3, a roller straightening method for a plate to be straightened according to the present invention in a straightening equipment line L having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. Corrected with. All of the steel sheets targeted in this embodiment are used after cutting the strips, and there is a strong demand for suppressing lateral bending deformation due to the cutting of the strips.

このとき、矯正荷重の予測値などに基づいて、ローラ矯正中のローラレベラの変形、ロールたわみなどの補償を勘案して、ローラレベラの入側押し込み装置４、出側押し込み装置５、および、ウェッジ調整機構１０を調整するが、本実施例では該矯正条件における最大の曲げを付与するロールに作用する荷重に基づいて、該最大の曲げを付与するロールにおけるローラ矯正中のロールたわみが無くなる方向にウェッジ調整を施している。 At this time, based on the predicted value of the straightening load and the like, taking into consideration compensation for deformation of the roller leveler during roller straightening, roll deflection, etc., the roller leveler entry side pushing device 4, the exit side pushing device 5, and the wedge adjusting mechanism 10 is adjusted, but in this embodiment, the wedge is adjusted in the direction in which the roll deflection during the roller straightening in the roll giving the maximum bending is eliminated based on the load acting on the roll giving the maximum bending under the straightening condition. Is given.

一方、該被矯正板のローラ矯正前の伸びひずみ差の板幅方向分布が過大な場合や設備制約などで該最大加工度が実現不可能と判断された場合、実施例１と同様にして、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を指向する。ここで、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を実施した場合には、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量をゼロに近い所定の値となる方向にウェッジ調整を施すことによって、ローラ矯正中のロールたわみを抑制した矯正パスを追加する。このとき、該追加矯正パスにおいては、該矯正条件における最大の曲げを付与するロールに作用する荷重に基づいて、該最大の曲げを付与するロールにおけるローラ矯正中のロールたわみが無くなる方向にウェッジ調整を施している。 On the other hand, when the distribution of the elongation strain difference of the plate to be straightened before roller straightening in the plate width direction is excessive or when it is determined that the maximum workability cannot be realized due to equipment restrictions or the like, the same as in Example 1 is performed. The roll bending amount for imparting the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction is the direction in which the distribution of the elongation-strain difference in the direction opposite to the distribution of the elongation-strain difference of the plate to be straightened is imparted in the plate width direction. Orient the roller correction set to. Here, the roll bending amount for imparting the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction is the plate width direction distribution of the elongation-strain difference in the direction opposite to the distribution of the elongation-strain difference of the plate to be straightened. When roller straightening is performed in the direction of applying, wedge adjustment is performed in the direction in which the roll bending amount for imparting the distribution of the elongation strain difference of the plate to be straightened in the plate width direction becomes a predetermined value close to zero. By doing so, a correction path that suppresses roll deflection during roller correction is added. At this time, in the additional straightening pass, the wedge is adjusted in the direction in which the roll deflection during the roller straightening in the roll giving the maximum bending is eliminated based on the load acting on the roll giving the maximum bending under the straightening condition. Is given.

以上説明した条件でもって、鋼板のローラ矯正に本方法を実施し、合計１７８本の鋼板を矯正した。その結果、いずれの被矯正板も、その後の需要家における条切断に伴う横曲がり変形は許容範囲に留まり、条切断に伴う横曲がり変形に関する需要家からのクレーム・コンプレインを大きく削減することができた。 Under the conditions described above, this method was carried out for roller straightening of steel sheets, and a total of 178 steel sheets were straightened. As a result, for any of the plates to be straightened, the lateral bending deformation due to the subsequent strip cutting remains within the allowable range, and the complaints and complains from the customer regarding the lateral bending deformation due to the strip cutting can be greatly reduced. did it.

（実施例４）
図１に示すローラレベラにおける板のローラ矯正に本発明を適用する実施例４を考える。このとき、被矯正板９の板厚、板幅、材料特性がプロセスコンピュータ８に伝送、記憶されている。 (Example 4)
Consider Example 4 in which the present invention is applied to roller straightening of a plate in the roller leveler shown in FIG. At this time, the plate thickness, plate width, and material properties of the plate 9 to be straightened are transmitted and stored in the process computer 8.

まず、ローラレベラの入側に設置された平坦度計７により、被矯正板９の平坦度データが測定される。測定結果はプロセスコンピュータ８に伝送される。なお、本実施例では、被矯正板９の平坦度データは、板幅センタおよび板幅両端部の３点で測定されている場合を考える。また、板幅両端部における伸びひずみの平均値と、板幅センタにおける伸びひずみとの偏差を用いて、被矯正板９の伸びひずみ差の板幅方向分布が定量化されているものとする。 First, the flatness data of the plate 9 to be straightened is measured by the flatness meter 7 installed on the entrance side of the roller leveler. The measurement result is transmitted to the process computer 8. In this embodiment, it is considered that the flatness data of the plate 9 to be straightened is measured at three points of the plate width center and both ends of the plate width. Further, it is assumed that the distribution of the elongation strain difference of the plate 9 to be straightened in the plate width direction is quantified by using the deviation between the average value of the elongation strain at both ends of the plate width and the elongation strain at the plate width center.

本矯正条件では、被矯正板９に最大加工度３を付与できるロール押込条件を設定している。ここで、該定量化された伸びひずみ差の板幅方向分布と相似かつ符号が逆となる長手方向軌跡長差率の板幅方向分布プロフィルを付与できる、板幅方向中央部のウェッジ調整量と板幅方向端部のウェッジ調整量との差を求める。ここで、ローラレベラにおける長手方向軌跡長は、各ロール直上および直下を結ぶ直線で評価した。このようにして、板幅方向各位置において、ローラレベラにおける長手方向軌跡長が評価できれば、その板幅方向平均値との偏差を該板幅方向平均値で除した値を長手方向軌跡長差率として求めた。ここでは、ローラレベラにおける長手方向軌跡長差率をΔｌで表すと、式（２）を実現するように板幅中央部のウェッジ調整量を、板幅端部のウェッジ機構の調整量とは異なる値に設定した。

ここで、係数ａおよびｃが定数、Ａは負の定数である。また、ｚは板幅中心からの板幅方向距離を表す。以上のようにして、被矯正板の伸びひずみ差の板幅方向分布の近似曲線プロフィルと相似かつ符号が逆になるローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルを付与できるロールベンディング量が求められ、ローラ矯正荷重などを鑑みて、これを実現できるロール設定条件でローラ矯正を行った。 In this straightening condition, a roll pushing condition that can give a maximum processing degree 3 to the plate 9 to be straightened is set. Here, with the wedge adjustment amount in the central portion in the plate width direction, which can give a plate width direction distribution profile of the longitudinal locus length difference ratio which is similar to the quantified distribution of the elongation strain difference in the plate width direction and whose sign is opposite. Find the difference from the wedge adjustment amount at the end in the plate width direction. Here, the longitudinal locus length in the roller leveler was evaluated by a straight line connecting directly above and directly below each roll. In this way, if the longitudinal locus length in the roller leveler can be evaluated at each position in the plate width direction, the value obtained by dividing the deviation from the average value in the plate width direction by the average value in the plate width direction is used as the longitudinal locus length difference ratio. I asked. Here, when the longitudinal locus length difference ratio in the roller leveler is expressed by Δl, the wedge adjustment amount at the center of the plate width is different from the adjustment amount of the wedge mechanism at the end of the plate width so as to realize the equation (2). Set to.

Here, the coefficients a and c are constants, and A is a negative constant. Further, z represents the distance in the plate width direction from the center of the plate width. As described above, the roll bending amount capable of imparting the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler which is similar to the approximate curve profile of the plate width direction distribution of the elongation strain difference of the plate to be straightened and whose sign is opposite. Was required, and in consideration of the roller straightening load and the like, roller straightening was performed under roll setting conditions that could realize this.

このようにして、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板のローラ矯正に本方法を適用した。その結果、ローラ矯正後の平坦度合格率は７７％であった。従来、この値は５３％であり、本方法の適用により、ローラ矯正による板の平坦度矯正が高効率となったことがわかる。加えて、製品平坦度に関する需要家からのクレーム・コンプレイン件数も大きく削減できたことから、本方法の適用により、ローラ矯正による板の平坦度矯正が安定的になったことがうかがえる。 In this way, this method was applied to roller straightening of a steel sheet having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. As a result, the flatness pass rate after roller straightening was 77%. Conventionally, this value is 53%, and it can be seen that the flatness correction of the plate by the roller straightening has become highly efficient by applying this method. In addition, the number of complaints and complains from consumers regarding product flatness could be significantly reduced, which suggests that the application of this method has made the flatness correction of the plate stable by roller straightening.

（実施例５）
図１に示すローラレベラにおける板のローラ矯正に本発明を適用する実施例５を考える。このとき、被矯正板９の板厚、板幅、材料特性がプロセスコンピュータ８に伝送、記憶されている。 (Example 5)
Consider Example 5 in which the present invention is applied to roller straightening of a plate in the roller leveler shown in FIG. At this time, the plate thickness, plate width, and material properties of the plate 9 to be straightened are transmitted and stored in the process computer 8.

まず、ローラレベラの入側に設置された平坦度計７により、被矯正板９の平坦度データが測定される。測定結果はプロセスコンピュータ８に伝送される。ただし、本実施例では、被矯正板９の平坦度データは、板幅方向に１９点の測定点で測定されている場合を考える。 First, the flatness data of the plate 9 to be straightened is measured by the flatness meter 7 installed on the entrance side of the roller leveler. The measurement result is transmitted to the process computer 8. However, in this embodiment, it is considered that the flatness data of the plate 9 to be straightened is measured at 19 measurement points in the plate width direction.

次に、プロセスコンピュータ８を用いて、伸びひずみ差の板幅方向分布プロフィルの近似曲線を求める。このとき、伸びひずみ差の板幅方向分布プロフィルの近似曲線を式（３）のように設定した。

ここで、Δεは板幅中心からの板幅方向距離、ｚは板幅中心からの板幅方向距離を表す。係数ａおよびｃが未知数であり、伸びひずみ差の板幅方向分布プロフィルを精度良く表すように最小自乗法などを用いて定められる。 Next, the process computer 8 is used to obtain an approximate curve of the distribution profile of the elongation-strain difference in the plate width direction. At this time, the approximate curve of the extension strain difference distribution profile in the plate width direction was set as in Eq. (3).

Here, Δε represents the distance in the plate width direction from the center of the plate width, and z represents the distance in the plate width direction from the center of the plate width. The coefficients a and c are unknown and are determined by using the least squares method or the like so as to accurately represent the distribution profile of the elongation strain difference in the plate width direction.

本矯正条件では、被矯正板９に最大加工度３を付与できるロール押込条件を設定している。ここで、該定量化された伸びひずみ差の板幅方向分布の近似曲線プロフィルと相似かつ符号が逆となる長手方向軌跡長差率の板幅方向分布プロフィルを付与するために必要な、板幅方向中央部のウェッジ調整量と板幅方向端部のウェッジ調整量との差を求める。ここで、ローラレベラにおける長手方向軌跡長は、各ロール直上および直下を結ぶ直線で評価した。このようにして、板幅方向各位置において、ローラレベラにおける長手方向軌跡長が評価できれば、その板幅方向平均値との偏差を該板幅方向平均値で除した値を長手方向軌跡長差率として求めることができる。得られた長手方向軌跡長差率を実現するように板幅中央部のウェッジ調整量を板幅端部のウェッジ機構の調整量とは異なる値に設定した。 In this straightening condition, a roll pushing condition that can give a maximum processing degree 3 to the plate 9 to be straightened is set. Here, the plate width necessary for imparting the plate width direction distribution profile of the longitudinal locus length difference ratio which is similar to the approximate curve profile of the plate width direction distribution of the quantified elongation strain difference and whose sign is opposite. Find the difference between the wedge adjustment amount at the center of the direction and the wedge adjustment amount at the end in the plate width direction. Here, the longitudinal locus length in the roller leveler was evaluated by a straight line connecting directly above and directly below each roll. In this way, if the longitudinal locus length in the roller leveler can be evaluated at each position in the plate width direction, the value obtained by dividing the deviation from the average value in the plate width direction by the average value in the plate width direction is used as the longitudinal locus length difference ratio. You can ask. The wedge adjustment amount at the center of the plate width was set to a value different from the adjustment amount of the wedge mechanism at the end of the plate width so as to realize the obtained longitudinal locus length difference ratio.

以上のようにして、被矯正板の伸びひずみ差の板幅方向分布の近似曲線プロフィルと相似かつ符号が逆になるローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルを付与できるロールベンディング量が求められ、ローラ矯正荷重などを鑑みて、これを実現できるロール設定条件でローラ矯正を行った。 As described above, the roll bending amount capable of imparting the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler which is similar to the approximate curve profile of the plate width direction distribution of the elongation strain difference of the plate to be straightened and whose sign is opposite. Was required, and in consideration of the roller straightening load and the like, roller straightening was performed under roll setting conditions that could realize this.

このようにして、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板のローラ矯正に本方法を適用した。その結果、ローラ矯正後の平坦度合格率は８２％であった。従来、この値は５３％であり、本方法の適用により、ローラ矯正による板の平坦度矯正が高効率となったことがわかる。加えて、製品平坦度に関する需要家からのクレーム・コンプレイン件数も大きく削減できたことから、本方法の適用により、ローラ矯正による板の平坦度矯正が安定的になったことがうかがえる。 In this way, this method was applied to roller straightening of a steel sheet having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. As a result, the flatness pass rate after roller straightening was 82%. Conventionally, this value is 53%, and it can be seen that the flatness correction of the plate by the roller straightening has become highly efficient by applying this method. In addition, the number of complaints and complains from consumers regarding product flatness could be significantly reduced, which suggests that the application of this method has made the flatness correction of the plate stable by roller straightening.

（実施例６）
図１に示す矯正設備ラインにおける板のローラ矯正に本発明を適用する実施例６を考える。但し、本実施例６で用いるローラレベラは図２に図示したものであるが、板幅端部のウェッジ調整量（図２中の機構１０ｃによるウェッジ調整量）と板幅中央部のウェッジ調整量（図２中の機構１０ａによるウェッジ調整量）とは異なる値に設定できるものの、２箇所の板幅端部（両端部）におけるウェッジ調整量（複数の機構１０ｃ間同士でのウェッジ調整量）はいずれも同じ値にしか設定できない構造となっている。また、このとき、被矯正板９の板厚、板幅、材料特性がプロセスコンピュータ８に伝送、記憶されている。 (Example 6)
Consider Example 6 in which the present invention is applied to roller straightening of a plate in the straightening equipment line shown in FIG. However, although the roller leveler used in the sixth embodiment is shown in FIG. 2, the wedge adjustment amount at the end of the plate width (the wedge adjustment amount by the mechanism 10c in FIG. 2) and the wedge adjustment amount at the center of the plate width (the wedge adjustment amount at the center of the plate width). Although it can be set to a value different from the wedge adjustment amount by the mechanism 10a in FIG. 2, the wedge adjustment amount (wedge adjustment amount between the plurality of mechanisms 10c) at the two plate width ends (both ends) will eventually be set. Has a structure that can only be set to the same value. At this time, the plate thickness, plate width, and material characteristics of the plate 9 to be straightened are transmitted and stored in the process computer 8.

ここで、上記実施例５に示した手順にて、被矯正板の伸びひずみ差の板幅方向分布プロフィルを把握する。次に、プロセスコンピュータ８を用いて、伸びひずみ差の板幅方向分布プロフィルの近似曲線を求める。このとき、伸びひずみ差の板幅方向分布プロフィルの近似曲線を以下の式（４）のように設定した。

ここで、ｚ_０は未知数であるが、係数ａおよびｃとあわせて伸びひずみ差の板幅方向分布プロフィルを精度良く表すように最小自乗法などを用いて定められる。このようにして定量化された被矯正板の伸びひずみ差の板幅方向分布の近似曲線プロフィルと、ローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルとが、相似かつ符号が逆になるロール押込量の板幅方向分布に近付けるロールベンディング量が求められる。このとき、被矯正板の板幅センタ位置とローラレベラの幅方向センタ位置とを上記同定された未知数ｚ_０だけずらして（オフセンタさせて）、これにより望ましいロールベンディング量となるロール設定条件が定めたうえで、ローラ矯正荷重などを鑑みて、これを実現できるロール設定条件でローラ矯正を行った。 Here, the distribution profile of the elongation strain difference of the plate to be straightened in the plate width direction is grasped by the procedure shown in Example 5 above. Next, the process computer 8 is used to obtain an approximate curve of the distribution profile of the elongation-strain difference in the plate width direction. At this time, the approximate curve of the extension strain difference distribution profile in the plate width direction was set as shown in the following equation (4).

Here, z ₀ is an unknown number, but it is determined by using the least squares method or the like so as to accurately represent the distribution profile of the elongation strain difference in the plate width direction together with the coefficients a and c. The approximate curve profile of the extension strain difference of the plate to be straightened, which is quantified in this way, and the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler are similar and opposite in sign. The roll bending amount that approaches the distribution of the roll pushing amount in the plate width direction is obtained. At this time, the widthwise center position of the plate width center position and roller leveler of the spanker (by off-center) by staggered unknown z ₀ identified above, thereby desirably roll bending amount become roll set condition is established Then, in consideration of the roller straightening load and the like, the roller straightening was performed under the roll setting conditions that can realize this.

このようにして、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板のローラ矯正に本方法を適用した。その結果、ローラ矯正後の平坦度合格率は８１％であった。従来、この値は４６％であり、本方法の適用により、ローラ矯正による板の平坦度矯正が高効率となったことがわかる。加えて、製品平坦度に関する需要家からのクレーム・コンプレイン件数も大きく削減できたことから、本方法の適用により、ローラ矯正による板の平坦度矯正が安定的になったことがうかがえる。 In this way, this method was applied to roller straightening of a steel sheet having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. As a result, the flatness pass rate after roller straightening was 81%. Conventionally, this value is 46%, and it can be seen that the application of this method has made the plate flatness correction by roller straightening highly efficient. In addition, the number of complaints and complains from consumers regarding product flatness could be significantly reduced, which suggests that the application of this method has made the flatness correction of the plate stable by roller straightening.

（実施例７）
図６に示す構成のローラレベラにおいて本発明を適用する実施例７を考える。但し、図６に示すローラレベラは、図２に示した構成のローラレベラ２０に比べ、ウェッジ機構１０の機構数（図２における１０ａ、１０ｃ）が５箇所に増えた部分のみ相違しており、その他の構成要素については図２に示すローラレベラ２０と同一であるため、同一の構成要素については同一の符号を付してその説明は省略する。なお、図６に記載のウェッジ機構１０においては、板幅方向中央部に機構１０ａが配置され、板幅方向端部に機構１０ｃが配置され、更に、機構１０ａと１０ｃの間（板幅方向クォータ部）に機構１０ｂが配置されているものとする。このとき、被矯正板９の板厚、板幅、材料特性がプロセスコンピュータ８に伝送、記憶されている。 (Example 7)
Consider Example 7 in which the present invention is applied to a roller leveler having the configuration shown in FIG. However, the roller leveler shown in FIG. 6 differs from the roller leveler 20 having the configuration shown in FIG. 2 only in the portion where the number of wedge mechanisms 10 (10a and 10c in FIG. 2) is increased to five, and the other parts are different. Since the components are the same as those of the roller leveler 20 shown in FIG. 2, the same components are designated by the same reference numerals and the description thereof will be omitted. In the wedge mechanism 10 shown in FIG. 6, the mechanism 10a is arranged at the central portion in the plate width direction, the mechanism 10c is arranged at the end portion in the plate width direction, and further, between the mechanisms 10a and 10c (plate width direction quota). It is assumed that the mechanism 10b is arranged in the part). At this time, the plate thickness, plate width, and material properties of the plate 9 to be straightened are transmitted and stored in the process computer 8.

次に、プロセスコンピュータ８を用いて、伸びひずみ差の板幅方向分布プロフィルの近似曲線を求める。このとき、伸びひずみ差の板幅方向分布プロフィルの近似曲線を、板幅中心をゼロとする板幅方向座標の偶関数で表現する。即ち、以下の式（５）のように設定した。

なお、係数Ａ、ＢおよびＣは未知数であり、伸びひずみ差の板幅方向分布プロフィルを精度良く表すように最小自乗法などを用いて定められる。 Next, the process computer 8 is used to obtain an approximate curve of the distribution profile of the elongation-strain difference in the plate width direction. At this time, the approximate curve of the extension strain difference distribution profile in the plate width direction is expressed by an even function of the coordinates in the plate width direction with the center of the plate width as zero. That is, it was set as in the following equation (5).

The coefficients A, B, and C are unknown and are determined by using the least squares method or the like so as to accurately represent the distribution profile of the elongation strain difference in the plate width direction.

ここで、ローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルと、上記式（５）によって設定される被矯正板の伸びひずみ差の板幅方向分布の近似曲線プロフィルとが、相似かつ符号が逆になるロール押込量の板幅方向分布に近付けるロールベンディング量が求められる。ローラ矯正荷重などを鑑みて、これを実現できるロール設定条件でローラ矯正を行った。 Here, the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler and the approximate curve profile of the plate width direction distribution of the elongation strain difference of the plate to be straightened set by the above equation (5) are similar and code. The roll bending amount that approaches the distribution of the roll pushing amount in the plate width direction is obtained. In consideration of the roller straightening load and the like, the roller straightening was performed under the roll setting conditions that can realize this.

このようにして、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板のローラ矯正に本方法を適用した。その結果、ローラ矯正後の平坦度合格率は８９％であった。従来、この値は５８％であり、本方法の適用により、ローラ矯正による板の平坦度矯正が高効率となったことがわかる。加えて、製品平坦度に関する需要家からのクレーム・コンプレイン件数も大きく削減できたことから、本方法の適用により、ローラ矯正による板の平坦度矯正が安定的になったことがうかがえる。 In this way, this method was applied to roller straightening of a steel sheet having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. As a result, the flatness pass rate after roller straightening was 89%. Conventionally, this value is 58%, and it can be seen that the application of this method has made the flatness correction of the plate by roller straightening highly efficient. In addition, the number of complaints and complains from consumers regarding product flatness could be significantly reduced, which suggests that the application of this method has made the flatness correction of the plate stable by roller straightening.

（実施例８）
図１および図２に示すローラレベラにおける板のローラ矯正に本発明を適用する実施例８を考える。このとき、被矯正板９の板厚、板幅、材料特性がプロセスコンピュータ８に伝送、記憶されている。 (Example 8)
Consider Example 8 in which the present invention is applied to roller straightening of a plate in the roller leveler shown in FIGS. 1 and 2. At this time, the plate thickness, plate width, and material properties of the plate 9 to be straightened are transmitted and stored in the process computer 8.

次に、プロセスコンピュータ８を用いて、伸びひずみ差の板幅方向分布プロフィルの近似曲線を求める。このとき、伸びひずみ差の板幅方向分布プロフィルの近似曲線を、板幅中心をゼロとする板幅方向座標の偶関数と、板幅中心をゼロとする板幅方向座標の一次関数との和で表現する。即ち、以下の式（６）のように設定した。

なお、係数ａ、ｂおよびｃは未知数であり、伸びひずみ差の板幅方向分布プロフィルを精度良く表すように最小自乗法などを用いて定められる。 Next, the process computer 8 is used to obtain an approximate curve of the distribution profile of the elongation-strain difference in the plate width direction. At this time, the approximate curve of the plate width direction distribution profile of the elongation strain difference is the sum of the even function of the plate width direction coordinates with the plate width center as zero and the linear function of the plate width direction coordinates with the plate width center as zero. Expressed by. That is, it was set as in the following equation (6).

The coefficients a, b and c are unknown and are determined by using the least squares method or the like so as to accurately represent the distribution profile of the elongation strain difference in the plate width direction.

ここで、ローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルと、上記式（６）によって設定される被矯正板の伸びひずみ差の板幅方向分布の近似曲線プロフィルとが、相似かつ符号が逆になるロール押込量の板幅方向分布に近付けるロールベンディング量が求められる。このとき、板幅端部のウェッジ調整量は、左右で異なる値に設定することにより、上記式（６）によって設定される被矯正板の伸びひずみ差の板幅方向分布の近似曲線プロフィルとが、相似かつ符号が逆になるロール押込量の板幅方向分布に近付けるロールベンディング量を設定している。そのうえ、ローラ矯正荷重などを鑑みて、これを実現できるロール設定条件でローラ矯正を行った。 Here, the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler and the approximate curve profile of the plate width direction distribution of the elongation strain difference of the plate to be straightened set by the above equation (6) are similar and code. The roll bending amount that approaches the distribution of the roll pushing amount in the plate width direction is obtained. At this time, by setting the wedge adjustment amount at the end of the plate width to different values on the left and right, the approximate curve profile of the elongation strain difference of the plate to be straightened set by the above equation (6) in the plate width direction can be obtained. , The roll bending amount is set to be close to the distribution of the roll pushing amount in the plate width direction, which is similar and has the opposite sign. In addition, in consideration of the roller straightening load and the like, the roller straightening was performed under the roll setting conditions that can realize this.

このようにして、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板のローラ矯正に本方法を適用した。その結果、ローラ矯正後の平坦度合格率は８３％であった。従来、この値は５３％であり、本方法の適用により、ローラ矯正による板の平坦度矯正が高効率となったことがわかる。加えて、製品平坦度に関する需要家からのクレーム・コンプレイン件数も大きく削減できたことから、本方法の適用により、ローラ矯正による板の平坦度矯正が安定的になったことがうかがえる。 In this way, this method was applied to roller straightening of a steel sheet having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. As a result, the flatness pass rate after roller straightening was 83%. Conventionally, this value is 53%, and it can be seen that the flatness correction of the plate by the roller straightening has become highly efficient by applying this method. In addition, the number of complaints and complains from consumers regarding product flatness could be significantly reduced, which suggests that the application of this method has made the flatness correction of the plate stable by roller straightening.

（実施例９）
図１および図２に示すローラレベラにおける板のローラ矯正に本発明を適用する実施例９を考える。このとき、被矯正板９の板厚、板幅、材料特性がプロセスコンピュータ８に伝送、記憶されている。 (Example 9)
Consider Example 9 in which the present invention is applied to roller straightening of a plate in the roller leveler shown in FIGS. 1 and 2. At this time, the plate thickness, plate width, and material properties of the plate 9 to be straightened are transmitted and stored in the process computer 8.

まず、ローラレベラの入側に設置された平坦度計７により、被矯正板９の平坦度データが測定される。測定結果はプロセスコンピュータ８に伝送される。ただし、本実施例では、被矯正板９の平坦度データは、板幅方向に１９点の測定点で測定されている場合を考える。また、板幅両端部における伸びひずみの平均値と、板幅センタにおける伸びひずみとの偏差を用いて、被矯正板９の伸びひずみ差の板幅方向分布が定量化されているものとする。 First, the flatness data of the plate 9 to be straightened is measured by the flatness meter 7 installed on the entrance side of the roller leveler. The measurement result is transmitted to the process computer 8. However, in this embodiment, it is considered that the flatness data of the plate 9 to be straightened is measured at 19 measurement points in the plate width direction. Further, it is assumed that the distribution of the elongation strain difference of the plate 9 to be straightened in the plate width direction is quantified by using the deviation between the average value of the elongation strain at both ends of the plate width and the elongation strain at the plate width center.

本矯正条件では、被矯正板９に最大加工度３を付与できるロール押込条件を設定している。ここで、該定量化された伸びひずみ差の板幅方向分布の近似曲線プロフィルと相似かつ符号が逆となる長手方向軌跡長差率の板幅方向分布プロフィルを付与できる、板幅方向中央部のウェッジ調整量と板幅方向端部のウェッジ調整量との差を求める。ここで、ローラレベラにおける長手方向軌跡長は、最大加工度を付与するロールの一本入側のロールから、最大加工度を付与するロールの一本出側のロールまでの区間で評価した。このようにして、板幅方向各位置において、ローラレベラにおける長手方向軌跡長が評価できれば、その板幅方向平均値との偏差を該板幅方向平均値で除した値を長手方向軌跡長差率として求めることができる。得られた長手方向軌跡長差率を実現するように板幅中央部のウェッジ調整量を板幅端部のウェッジ機構の調整量とは異なる値に設定した。 In this straightening condition, a roll pushing condition that can give a maximum processing degree 3 to the plate 9 to be straightened is set. Here, a plate width direction distribution profile of a longitudinal locus length difference ratio that is similar to and opposite in sign to the approximate curve profile of the plate width direction distribution of the quantified elongation strain difference can be given, in the central portion in the plate width direction. Find the difference between the wedge adjustment amount and the wedge adjustment amount at the end in the plate width direction. Here, the longitudinal locus length in the roller leveler was evaluated in the section from the roll on the one-in side of the roll that gives the maximum degree of processing to the roll on the one-out side of the roll that gives the maximum degree of processing. In this way, if the longitudinal locus length in the roller leveler can be evaluated at each position in the plate width direction, the value obtained by dividing the deviation from the average value in the plate width direction by the average value in the plate width direction is used as the longitudinal locus length difference ratio. You can ask. The wedge adjustment amount at the center of the plate width was set to a value different from the adjustment amount of the wedge mechanism at the end of the plate width so as to realize the obtained longitudinal locus length difference ratio.

このようにして、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板のローラ矯正に本方法を適用した。その結果、ローラ矯正後の平坦度合格率は８４％であった。従来、この値は５３％であり、本方法の適用により、ローラ矯正による板の平坦度矯正が高効率となったことがわかる。加えて、製品平坦度に関する需要家からのクレーム・コンプレイン件数も大きく削減できたことから、本方法の適用により、ローラ矯正による板の平坦度矯正が安定的になったことがうかがえる。 In this way, this method was applied to roller straightening of a steel sheet having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. As a result, the flatness pass rate after roller straightening was 84%. Conventionally, this value is 53%, and it can be seen that the flatness correction of the plate by the roller straightening has become highly efficient by applying this method. In addition, the number of complaints and complains from consumers regarding product flatness could be significantly reduced, which suggests that the application of this method has made the flatness correction of the plate stable by roller straightening.

（実施例１０）
図７に示す矯正設備ラインにおける板のローラ矯正に本発明を適用する実施例１０を考える。ここで、図７に示す矯正設備ラインは、図１に示す矯正設備ラインＬと同様の構成を有しており、平坦度計７とローラレベラ２０との間に、オフセンタ装置としてサイドガイド１１を具備している点が相違している。図７においては図１に示す矯正設備ラインＬと同一の機能構成を有する構成要素については同一の符号を付し、その説明は省略する。 (Example 10)
Consider Example 10 in which the present invention is applied to roller straightening of a plate in the straightening equipment line shown in FIG. 7. Here, the straightening equipment line shown in FIG. 7 has the same configuration as the straightening equipment line L shown in FIG. 1, and a side guide 11 is provided as an off-center device between the flatness meter 7 and the roller leveler 20. The difference is that they are doing. In FIG. 7, components having the same functional configuration as the straightening equipment line L shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

図７に示す矯正設備ラインにおいては、被矯正板９が平坦度計７を通過すると、プロセスコンピュータ８により、上記実施例４に示す手順で、定量化された被矯正板の伸びひずみ差の板幅方向分布の近似曲線プロフィルと、ローラレベラにおける長手方向軌跡長差率の板幅方向分布プロフィルとが、相似かつ符号が逆になるロール押込量の板幅方向分布に近付けるロールベンディング量およびオフセンタ量が求められる。被矯正板９がサイドガイド１１に到達した時点で、サイドガイド１１を作動させることで被矯正板９に所望のオフセンタ量を付与した後、ローラ矯正荷重などを鑑みて、該ロールベンディング量を実現できるロール設定条件でローラ矯正を行った。 In the straightening equipment line shown in FIG. 7, when the plate to be straightened 9 passes through the flatness meter 7, the plate with the difference in elongation and strain of the plate to be straightened is quantified by the procedure shown in Example 4 by the process computer 8. The roll bending amount and off-center amount that make the approximate curve profile of the width direction distribution and the plate width direction distribution profile of the longitudinal locus length difference ratio in the roller leveler close to the plate width direction distribution of the roll pushing amount that is similar and has the opposite sign. Desired. When the plate to be straightened reaches the side guide 11, the side guide 11 is operated to give the plate to be straightened a desired amount of off-center, and then the roll bending amount is realized in consideration of the roller straightening load and the like. Roller correction was performed under possible roll setting conditions.

このようにして、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板のローラ矯正に本方法を適用した。その結果、ローラ矯正後の平坦度合格率は８２％であった．従来、この値は５３％であり、本方法の適用により、ローラ矯正による板の平坦度矯正が高効率となったことがわかる。しかも、オフセンタ装置の設置により、処理能力（１日あたりの処理枚数）が従来の２倍を超えるようになり、高い生産性を確保できるようになった。 In this way, this method was applied to roller straightening of a steel plate having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. As a result, the flatness pass rate after roller straightening was 82%. Conventionally, this value is 53%, and it can be seen that the flatness correction of the plate by roller straightening has become highly efficient by applying this method. Moreover, by installing the off-center device, the processing capacity (the number of sheets processed per day) has become more than double that of the conventional one, and high productivity can be ensured.

（実施例１１）
実施例１１として、板厚２〜１０ｍｍ、板幅１０００〜４０００ｍｍ、引張強度３００〜１１５０ＭＰａの鋼板を、図１に示した構成である矯正設備ラインＬにおいて本発明にかかる被矯正板のローラ矯正方法で矯正した。なお、本実施例が対象とする鋼板は、いずれも条切断せずに利用されるものであり、ローラ矯正後の被矯正板としての平坦度が強く求められているものである。 (Example 11)
As Example 11, a roller straightening method for a plate to be straightened according to the present invention in a straightening equipment line L having a plate thickness of 2 to 10 mm, a plate width of 1000 to 4000 mm, and a tensile strength of 300 to 1150 MPa. Corrected with. All of the steel sheets targeted in this embodiment are used without cutting the strips, and the flatness as a plate to be straightened after roller straightening is strongly required.

ここで、該被矯正板のローラ矯正前の伸びひずみ差の板幅方向分布が過大な場合や設備制約などで該最大加工度が実現不可能と判断された場合、実施例１と同様にして、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を指向する。このとき、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を実施した場合であっても、矯正パスは追加しない。 Here, when the distribution of the elongation strain difference of the plate to be straightened before roller straightening in the plate width direction is excessive or when it is determined that the maximum workability cannot be realized due to equipment restrictions or the like, the same procedure as in Example 1 is performed. , The amount of roll bending for imparting the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction is assigned to the distribution of the elongation-strain difference in the direction opposite to the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction. Orient the roller straightening set in the direction. At this time, the roll bending amount for imparting the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction is changed to the distribution of the elongation-strain difference in the direction opposite to the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction. Even if the roller straightening is performed in the direction of granting, the straightening path is not added.

以上説明した条件でもって、鋼板のローラ矯正に本方法を実施し、合計２３４本の鋼板を矯正した。その結果、ローラ矯正後の平坦度合格率は８１％であった。従来、被矯正板の伸びひずみ差の板幅方向分布を付与するためのロールベンディング量を被矯正板の伸びひずみ差の板幅方向分布と相反する方向の伸びひずみ差の板幅方向分布を付与する方向に設定したローラ矯正を実施した場合には、ローラ矯正中のロールたわみを抑制した矯正パスを追加していたが、このときのローラ矯正後の平坦度合格率は７７％であった。つまり、本方法の適用により、ローラ矯正による板の平坦度矯正効果がさらに高められたことがわかる。 Under the conditions described above, this method was carried out for roller straightening of steel plates, and a total of 234 steel plates were straightened. As a result, the flatness pass rate after roller straightening was 81%. Conventionally, the roll bending amount for imparting the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction is given the distribution of the elongation-strain difference in the direction opposite to the distribution of the elongation-strain difference of the plate to be straightened in the plate width direction. When the roller straightening was performed in the direction of the roller straightening, a straightening path that suppressed the roll deflection during the roller straightening was added, but the flatness pass rate after the roller straightening at this time was 77%. That is, it can be seen that the application of this method further enhances the flatness correction effect of the plate by the roller straightening.

本発明は、複数本のロールを上下に千鳥状に配置し、それらロール間に被矯正板を通して繰り返し曲げを与えることによって被矯正板を平坦化する、ロール押込量の板幅方向分布を調整する機構を有するローラレベラにおける板のローラ矯正方法およびローラ矯正設備に適用できる。 The present invention adjusts the distribution of the roll pushing amount in the plate width direction by arranging a plurality of rolls in a staggered manner vertically and flattening the plate to be straightened by repeatedly bending the plates to be straightened between the rolls. It can be applied to the roller straightening method and roller straightening equipment of a plate in a roller leveler having a mechanism.

１…ワークロール（ロール）
１^（ｉ）…ｉ番目のワークロール（ロール）
２…下ロール群
２ａ…下ロール群フレーム
３…上ロール群
３ａ…上ロール群フレーム
４…入側押し込み装置
５…出側押し込み装置
６…ハウジング
７…平坦度計
８…プロセスコンピュータ
９…被矯正板
１０…ウェッジ調整機構
１０ａ…板幅方向中央部のウェッジ調整機構
１０ｂ…板幅方向クォータ部のウェッジ調整機構
１０ｃ…板幅方向端部のウェッジ調整機構
１１…サイドガイド
２０…ローラレベラ
Ｌ…矯正設備ライン 1 ... Work roll (roll)
1 ⁽ⁱ⁾ ... i-th work roll (roll)
2 ... Lower roll group 2a ... Lower roll group frame 3 ... Upper roll group 3a ... Upper roll group frame 4 ... Enter side pushing device 5 ... Outer side pushing device 6 ... Housing 7 ... Flatness meter 8 ... Process computer 9 ... Corrected Plate 10 ... Wedge adjustment mechanism 10a ... Wedge adjustment mechanism in the center in the plate width direction 10b ... Wedge adjustment mechanism in the quarter in the plate width direction 10c ... Wedge adjustment mechanism at the end in the plate width direction 11 ... Side guide 20 ... Roller leveler L ... Straightening equipment line

Claims

In a roller leveler in which a plurality of rolls are arranged in a staggered manner vertically and has a mechanism for adjusting the distribution of the roll pushing amount in the plate width direction, the plate to be straightened is repeatedly bent by passing the plate to be straightened between the plurality of rolls. It is a roller straightening method of the plate to be straightened to flatten the
The roll bending amount during roller straightening is the sum of the roll bending amount for compensating for the roll deflection due to the straightening reaction force and the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened. A roller straightening method for a plate to be straightened, characterized in that it is set as.

The roll bending amount for compensating for the roll deflection due to the straightening reaction force is set based on the straightening load acting on the roll that imparts the final plastic bending to the plate to be straightened in the roller leveler. The roller straightening method for a plate to be straightened according to claim 1.

The roll bending amount for compensating for the roll deflection due to the straightening reaction force is set based on the straightening load acting on the roll that gives the maximum bending to the plate to be straightened in the roller leveler. The roller straightening method for a plate to be straightened according to claim 1.

The maximum degree of processing to be applied to the plate to be straightened during roller straightening was obtained according to the distribution of the elongation strain difference of the plate to be straightened in the plate width direction.
When the maximum degree of processing to be applied to the plate to be straightened can be achieved during roller straightening, the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is set to a predetermined value close to zero. After that, roller straightening is performed under straightening conditions that can obtain the maximum machining degree that exceeds the maximum machining degree.
When the maximum degree of processing to be applied to the plate to be straightened cannot be achieved during roller straightening, the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is set to the elongation strain of the plate to be straightened. 6. Roller straightening method for the plate to be straightened.

When the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is a predetermined value close to zero, the elongation strain difference at the center of the plate width and the elongation at the end of the plate width before roller straightening. The ratio of the deviation from the strain difference to the deviation between the elongation strain difference at the center of the plate width after roller straightening and the elongation strain difference at the end of the plate width determines the maximum workability given to the plate to be straightened during roller straightening. When expressed by a function that is an argument
4. The fourth aspect of the present invention is to obtain the maximum degree of processing to be applied to the plate to be straightened during roller straightening according to the distribution of the elongation strain difference of the plate to be straightened in the plate width direction by using the relational expression related to the function. The roller straightening method of the plate to be straightened described in.

The plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening and the plate width direction distribution profile of the longitudinal locus length difference ratio of the plate to be straightened in the roller leveler are similar and have opposite signs. The straightening according to claim 1, wherein the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is set so as to approach the distribution of the roll pushing amount in the plate width direction. Roller straightening method for boards.

By shifting the plate width center position of the plate to be straightened and the width direction center position of the roller leveler, the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening and the longitudinal direction of the plate to be straightened in the roller leveler. The plate width direction distribution of the elongation strain difference is given to the plate to be straightened so that the profile and the plate width direction distribution of the locus length difference rate are close to the plate width direction distribution of the roll pushing amount having similar and opposite signs. The roller straightening method for a plate to be straightened according to claim 1, wherein a roll bending amount for the purpose is set.

The plate to be straightened according to claim 6 or 7, wherein the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening is expressed by an approximate function with the plate width direction coordinates as arguments. Roller correction method.

6. The roller straightening method of the plate to be straightened described in.

The approximate function of the plate width direction distribution profile of the elongation strain difference of the plate to be straightened before roller straightening is the even function of the plate width direction coordinates with the plate width center as zero and the first order of the plate width direction coordinates with the plate width center as zero. The roller straightening method for a plate to be straightened according to claim 6 or 7, wherein the method is expressed as a sum with a function.

The straightening according to any one of claims 6 to 10, wherein the longitudinal locus length of the plate to be straightened in the roller leveler is evaluated by a straight line connecting directly above and directly below each roll at a position in the plate width direction. How to correct the roller of the board.

It is recommended that the longitudinal locus length of the plate to be straightened in the roller leveler be evaluated in the section from the roll on the one-in side of the roll that gives the maximum degree of processing to the roll on the one-out side of the roll that gives the maximum degree of processing. The roller straightening method for a plate to be straightened, which is characterized by any one of claims 6 to 11.

Claim 6 to claim 6, wherein the longitudinal locus length of the plate to be straightened in the roller leveler is evaluated in a section from the second roll from the innermost side of the roller leveler to the fourth roll from the innermost side of the roller leveler. The roller straightening method for a plate to be straightened according to any one of 11.

Claim 6 to claim 6, wherein the longitudinal locus length of the plate to be straightened in the roller leveler is evaluated in a section from the third roll from the innermost side of the roller leveler to the fifth roll from the innermost side of the roller leveler. The roller straightening method for a plate to be straightened according to any one of 11.

The direction in which the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is given the distribution in the plate width direction of the elongation strain difference in the direction opposite to the distribution in the plate width direction of the elongation strain difference of the plate to be straightened. When roller straightening is performed with the setting set to, a straightening path is added in which the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is set to a predetermined value close to zero. , The roller straightening method for a plate to be straightened according to any one of claims 1 to 3.

The direction in which the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened is given the distribution in the plate width direction of the elongation strain difference in the direction opposite to the distribution in the plate width direction of the elongation strain difference of the plate to be straightened. The roller straightening method for a plate to be straightened according to any one of claims 1 to 3, wherein a straightening path is not added when the roller straightening is performed by setting to.

In a roller leveler in which a plurality of rolls are arranged in a staggered manner vertically and has a mechanism for adjusting the distribution of the roll pushing amount in the plate width direction, the plate to be straightened is repeatedly bent by passing the plate to be straightened between the plurality of rolls. It is a roller straightening equipment that flattens
The roll bending amount during roller straightening is the sum of the roll bending amount for compensating for the roll deflection due to the straightening reaction force and the roll bending amount for imparting the distribution of the elongation strain difference in the plate width direction to the plate to be straightened. The control unit that controls the setting as
Roller straightening equipment equipped with.

The roller straightening equipment according to claim 17, further comprising an off-center device capable of adjusting the plate width center position of the plate to be straightened with respect to the width direction center position of the roller leveler.

The roller straightening equipment according to claim 17 or 18, further comprising a flatness meter capable of measuring the distribution profile of the elongation strain difference of the plate to be straightened in the plate width direction.

The roller straightening equipment according to claim 19, wherein the flatness meter is installed on the entrance side of the roller leveler.