JP5448692B2 - Tension roller leveler - Google Patents

Description

The present invention relates to a tension roller level La having an elongated device and warp correcting device of the metal plate.

Conventionally, as equipment to correct shape defects such as middle elongation and ear waves of steel plates (metal plates), an extension device for giving the steel sheet a desired elongation rate, and warp correction for correcting the bending of the stretched steel plate The tension roller leveler provided with the apparatus is used (for example, refer patent document 1). In the warp correction device, the warpage in the width direction of the steel sheet (hereinafter also referred to as C warpage) is corrected, and then the warpage in the longitudinal direction (hereinafter also referred to as L warpage) is corrected.
As shown in FIG. 7, the correction of the L warpage of the steel sheet is performed by using a plurality of work rolls No. 1 arranged alternately on both sides in the thickness direction of the steel sheet 90 in the conveying direction of the steel sheet 90. 1-No. 11 is used. Note that numbers 91 and 92 in FIG. 1-No. 11 is a backup roll that supports 11 respectively.

Here, a plurality of work roll Nos. 1-No. 11, the warping is corrected by gradually reducing the amount of rolling of the steel sheet 90 by making the inlet side under a strong pressure and the outlet side under a light pressure.
FIG. 8 shows the numerical analysis results of the correction history of the L warp when the rolling amount of the steel sheet 90 is variously changed (input side: 3 mm, output side: −0.3 to 2 mm).
Here, the amount of reduction is a state in which the vertical distance between the lower end of the work roll arranged on the upper side of the steel plate 90 and the upper end of the work roll arranged on the lower side is equal to the plate thickness of the steel plate 90 to be corrected. Is a reference state (zero), and means an amount by which the upper work roll and the lower work roll are pushed into the steel plate 90 from the reference state (hereinafter the same).

Note that “roll No.” on the horizontal axis in FIG. 1-No. 11 respectively. Further, the amount of reduction of the steel plate 90 is the work roll No. disposed on the upper side of the steel plate 90. 2, No. 4, no. 6, no. 8 and no. No. 10 work position is fixed and the work roll No. 1, no. 3, no. 5, no. 7, no. 9 and no. 11 is adjusted by moving up and down in a tiltable manner.
As shown in FIG. 1-No. 11, even if the amount of rolling of the steel sheet is changed variously by making the entry side under a strong pressure and the exit side under a light pressure, the L warpage of the steel sheet can be caused by the work roll no. 1-No. It turns out that it can be made small gradually from the entrance side of 11 to an exit side.

Japanese Utility Model Publication No. 46-910

However, when the region where the L-warp of the steel sheet shown in FIG. 8 converges is enlarged, as shown in FIG. 9, the L-warp once converged by the work roll in the middle continues to maintain its state and becomes zero. I found it impossible to adjust. For this reason, the further quality improvement of the steel plate could not be achieved.

The present invention has been made in view of such circumstances, to correct the longitudinal warpage of the metal plate, and an object thereof is to provide a tension roller level ra attained the further improvement of quality.

The tension roller leveler according to the first aspect of the present invention is a tension roller leveler in which the metal plate stretching device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the conveying direction of the metal plate. ,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. the warpage left in the exit side to give warpage of opposite, possess a large-diameter work roll at least three odd number of correcting warpage generated in the longitudinal direction of the metal plate,
The large-diameter work rolls, rolling reduction is Ru adjustable der.

The tension roller leveler according to the second aspect of the present invention is a tension roller leveler in which the metal plate stretching device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the conveying direction of the metal plate. ,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. Having at least three odd-numbered large-diameter work rolls that correct the warp generated in the longitudinal direction of the metal plate by giving a warp opposite to the warp left on the exit side;
The large-diameter work roll, the pitch width of the conveying direction of the metal plate is Ru adjustable der.

A tension roller leveler according to a third aspect of the present invention, wherein the tension roller leveler is configured such that the metal plate stretching device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the conveying direction of the metal plate. ,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. Having at least three odd-numbered large-diameter work rolls that correct the warp generated in the longitudinal direction of the metal plate by giving a warp opposite to the warp left on the exit side;
Each small-diameter work rolls which are arranged below or above the metal plate, Ru der allow tilting pressure is gradually reduced reduction ratio to move integrally.

A tension roller leveler according to a fourth aspect of the present invention that meets the above-described object is a tension roller leveler in which the metal plate stretching device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the transport direction of the metal plate. ,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. Having at least three odd-numbered large-diameter work rolls that correct the warp generated in the longitudinal direction of the metal plate by giving a warp opposite to the warp left on the exit side;
The diameter of the large diameter work rolls, Ru 5 times der than 3.5 times the diameter of the small-diameter work roll.
In the tension roller levelers according to the first to fourth inventions, the number of the small-diameter work rolls is preferably at least six.

Warp tension roller level La of the present invention, a small diameter work roll, (after converged) was gradually reduced warpage generated in the metal plate, in large-diameter work roll, leaving at the exit side of the small-diameter work roll Therefore, fine adjustment and elimination (zero point adjustment) of warp can be achieved with a large-diameter work roll while utilizing the correction effect obtained with a small-diameter work roll. This is because the bending curvature of the metal plate can be increased by using a large-diameter work roll, and the adjustment allowance for warpage can be secured.
Also, by using a large-diameter work roll, the number of small-diameter work rolls used can be reduced (for example, about half of the conventional one), so that the installation space for the longitudinal warpage correction device can be narrowed, Equipment costs can also be reduced.
Therefore, the tension roller leveler can be corrected in the longitudinal direction of the metal plate without making it complicated and expensive, and the quality of the metal plate can be further improved.

For large diameter work rolls, if the reduction amount can be adjusted or the pitch width in the conveying direction of the metal plate can be adjusted, for example, the operating conditions such as the elongation of the metal plate are changed. Even when it is done, fine adjustment and elimination of the warpage of the metal plate can be achieved with a simple operation.
When the diameter of the large-diameter work roll is 3.5 to 5 times the diameter of the small-diameter work roll, it has a size that can be installed on the tension roller leveler, and the rigidity is increased to correct the warpage of the metal plate. The bending of the roll at the time can also be suppressed.

It is explanatory drawing which shows the structure of the tension roller leveler which concerns on one embodiment of this invention. It is explanatory drawing of the longitudinal direction curvature correction apparatus of the tension roller leveler. It is explanatory drawing which shows the relationship between the number of the work rolls in a longitudinal direction curvature correction apparatus, and a curvature radius. It is explanatory drawing which shows the relationship between the diameter of a large diameter work roll, a curvature radius, and roll bending. It is explanatory drawing which shows the relationship between L curvature of a steel plate, and amount of reduction. It is explanatory drawing which shows the relationship between L curvature of a steel plate, and the pitch width of a large diameter work roll. It is explanatory drawing of the curvature correction apparatus of the tension roller leveler which concerns on a prior art example. It is explanatory drawing which shows the log | history of L curvature by the same curvature correction apparatus. It is the elements on larger scale of the convergence area | region of L curvature of FIG.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 and 2, a tension roller leveler 10 according to an embodiment of the present invention includes a stretching device 12 for a steel plate 11 and a width direction warpage correction device in the conveying direction of the steel plate (an example of a metal plate) 11. (Hereinafter also referred to as a C warp correction device) 13 and a longitudinal warpage correction device (also referred to as an L warp correction device) 14 are sequentially disposed. The extension device 12, the width direction warpage correction device 13, and the longitudinal direction warpage correction device 14 are attached and fixed to the base table 15 of the tension roller leveler 10. This will be described in detail below.

The stretching device 12 shown in FIG. 1 has a function of imparting a bending and stretching force to the steel plate 11 to cause plastic deformation and stretching the steel plate 11.
Two stretching devices 12 are installed in the conveying direction of the steel plate 11, and have upper and lower rolls 16 and 17 that sandwich the steel plate 11 at different positions in the conveying direction of the steel plate 11 from both sides in the thickness direction of the steel plate 11. The shaft portions on both sides of the upper and lower rolls 16 and 17 are rotatably attached and fixed to roll housings (not shown) fixed to the upper frame 18 and the lower frame 19, respectively, and a plurality of backup rolls 20 and 21. Is supported by Here, the upper frame 18 is attached and fixed to the upper base 21 a, and the lower frame 19 can be raised and lowered by a jack 22 attached to the base base 15, and can be raised and lowered while tilting the lower roll 17. .
In addition, if an extending | stretching apparatus can extend a steel plate, it will not be limited to the said structure.

The C-warp correction device 13 shown in FIG. 1 has a function of correcting a warp in the width direction (hereinafter also referred to as C-warp) that occurs when the steel plate 11 is elongated.
The C warp correction device 13 is disposed on the downstream side of the stretching device 12 and has one upper roll 23 and two lower rolls 24 that are alternately disposed on both sides in the thickness direction of the steel plate 11. The shaft portions on both sides of the upper and lower rolls 23 and 24 are rotatably fixed to roll housings (not shown) fixed to the upper frame 25 and the lower frame 26, respectively. The upper roll 23 is supported by a plurality of backup rolls 27, and the lower roll 24 has a diameter larger than that of the upper roll 23 and does not use a backup roll. Here, the upper frame 25 is attached and fixed to the upper base 21a, and the lower frame 26 can be raised and lowered by a jack 28 attached to the base base 15, and the lower roll 24 can be raised and lowered.
Note that the C warpage correction device is not limited to the above configuration as long as the C warpage can be corrected.

1 and 2 has a function of correcting a warp in the longitudinal direction of the steel plate 11 (hereinafter also referred to as an L warp).
The L-warp correction device 14 includes six (even) small-diameter work rolls 29 to 34, and three small-diameter work rolls 29 to 34 that are arranged downstream of the small-diameter work rolls 29 to 34 and have a diameter larger than that of the small-diameter work rolls 29 to 34. (Odd number) large-diameter work rolls 35-37. Among these small diameter work rolls 29 to 34, both side shaft portions of the small diameter work rolls 30, 32, 34 arranged on the upper side of the steel plate 11, and the large diameter arranged on the upper side among the large diameter work rolls 35 to 37. The shaft portions on both sides of the diameter work roll 36 are rotatably fixed to a roll housing (not shown) fixed to the upper frame 38, respectively. In addition, each small-diameter work roll 29, 31, 33 disposed on the lower side of the steel plate 11 and both side shaft portions of each large-diameter work roll 35, 37 are roll housings (not shown) fixed to the lower frame 39. In addition, each is rotatably mounted and fixed.

The small-diameter work rolls 29 to 34 described above are respectively supported by backup rolls 40 and 41 divided in the width direction of a plurality of pieces (here, about 2 rows × 10 pieces).
The small-diameter work rolls 29, 31, 33 arranged on the lower side of the steel plate 11 and both side shaft portions of the large-diameter work rolls 35, 37 are rotatably attached and fixed to one lower frame 39. However, the lower frame can be separated by the small diameter work rolls 29, 31, 33 and the large diameter work rolls 35, 37. At this time, each small-diameter work roll 30, 32, 34 arranged on the upper side of the steel plate 11 and one upper frame to which the large-diameter work roll 36 is attached can also be separated.
In this case, the reduction amount can be individually adjusted by the small diameter work rolls 29 to 34 and the large diameter work rolls 35 to 37.

The six small diameter work rolls 29 to 34 are alternately arranged on both sides in the thickness direction of the steel plate 11 over the conveying direction of the steel plate 11. For this reason, among the six small-diameter work rolls 29 to 34, the small-diameter work roll 34 located on the most downstream side is disposed on the lowermost side by disposing the small-diameter work roll 29 located on the most upstream side. Is disposed above.
These small-diameter work rolls 29 to 34 are for reducing the L warpage of the steel plate 11 to a converging range. Therefore, according to FIG. 9 showing the L warp when the rolling amount of the steel sheet is changed, it is preferable that the number of small diameter work rolls is practically at least 6, but it is set to 4 or more by adjusting the rolling amount of the steel sheet. You can also.
Thereby, L curvature can be converged in the range of -15 * 10 < ^-5 > mm or more and 15 * 10 < ^-5 > mm or less, for example.

Although the upper limit value of the number of small diameter work rolls is not defined, as shown in FIG. 9, even if the number of small diameter work rolls is too large, there is almost no effect of converging the L warp, so that the number is 10 or less. Further, it is preferably 8 or less.
Here, the number of small diameter work rolls is an even number. This is because the total number of small-diameter work rolls and large-diameter work rolls is an odd number as in the prior art, and the number of large-diameter work rolls is an odd number of 3 or more (preferably 5 or less). Depends on the setting.
Thereby, the L curvature which generate | occur | produced in the steel plate 11 can be gradually made small by letting the steel plate 11 pass between the some small diameter work rolls 29-34 arrange | positioned up and down. Moreover, since the small diameter work roll 34 located in the exit side is arrange | positioned above the steel plate 11, a curvature direction remains in the thickness direction lower side (one side) of the steel plate 11 at the exit side of the small diameter work rolls 29-34 group. be able to.

The three large-diameter work rolls 35 to 37 are alternately arranged on both sides in the thickness direction of the steel plate 11 over the conveying direction of the steel plate 11 on the downstream side of the small-diameter work roll 34.
Here, among the three large-diameter work rolls 35 to 37, the large-diameter work roll 35 positioned on the most upstream side is arranged, and among the small-diameter work rolls 29 to 34, the arrangement direction of the small-diameter work roll 34 positioned on the outlet side is arranged. Is disposed in the opposite direction, that is, below the steel plate 11. For this reason, the large-diameter work roll 37 located on the most downstream side is also arranged below the steel plate 11.
Thereby, the warp to the opposite side to the warp left on the exit side of the small diameter work rolls 29 to 34, that is, the upper side in the thickness direction of the steel plate 11 can be given to the steel plate 11, and as a result, in the longitudinal direction of the steel plate 11. The generated L warp can be corrected.

The upper frame 38 is attached and fixed to the upper base 21a, and the lower frame 39 is connected to an inlet jack (an example of an inlet side reduction means) 42 attached to the base base 15 and an outlet jack (an outlet side reduction means). One example) 43 can be moved up and down.
The entrance side jack 42 and the exit side jack 43 are arranged with a gap in the conveying direction of the steel plate 11, and their upper end portions are in contact with the lower portion of the lower frame 39. For this reason, the entrance side jack 42 and the exit side jack 43 are independently adjusted in height, so that the three small-diameter work rolls 29, 31, 33 arranged below the steel plate 11 and the two large diameters are arranged. The work rolls 35 and 37 can be moved up and down integrally, and the amount of reduction of the steel plate 11 can be adjusted.
Here, by making the upper end position of the entry-side jack 42 higher than the upper end position of the exit-side jack 43, the entry side of the L warp correction device 14 is under a strong pressure, the exit side is under a light pressure, and the steel plate 11 is reduced. Adjustment to gradually reduce the amount in the conveying direction of the steel plate 11 becomes possible.

Further, the adjustment of the amount of reduction by the large-diameter work rolls 35 to 37 can also be performed by adjusting the height of the large-diameter work roll 36 located above the steel plate 11. As this method, for example, there is a conventional method using a shim or an eccentric shaft. In addition, when using an eccentric shaft, an eccentric shaft is provided in all large diameter work rolls.
Furthermore, each large diameter work roll 35-37 can adjust the pitch width of the conveyance direction of the steel plate 11. FIG. As this method, for example, there is a conventional method in which an eccentric shaft or a slide base is provided. In addition, when using an eccentric shaft, an eccentric shaft is provided in all the large diameter work rolls, and when using a slide base, one or both of the large diameter work rolls positioned below the steel plate 11 are moved horizontally.
Thereby, fine adjustment for correcting the L warp generated in the steel plate 11 becomes possible.

The diameters of the small-diameter work rolls 29 to 34 described above are substantially the same, for example, about 30 mm or more and 50 mm or less. Moreover, the diameter of each large diameter work roll 35-37 is also substantially the same, for example, although it is 100 mm or more, it is preferable that they are 140 mm or more and 200 mm or less. The reason for defining the diameter of the large-diameter work roll in this way will be described with reference to the numerical analysis results shown in FIGS.
In FIG. 3, transition of the curvature radius of the steel plate for every work roll is shown. Here, the ◆ mark in FIG. 3 indicates the result when nine small diameter work rolls (roll Nos. 1 to 9) having a diameter of 40 mm are used, and the ■ mark indicates six small diameter work rolls having a diameter of 40 mm (roll No. ..1-6) and three large-diameter work rolls having a diameter of 100 mm (roll Nos. 7-9). As a result, ▲ indicates six small-diameter work rolls having a diameter of 40 mm (roll No. 1-roll). 6) and the results when three large-diameter work rolls having a diameter of 180 mm (roll Nos. 7 to 9) are used.

In the large diameter work roll, it is necessary to eliminate the warp left on the exit side of the small diameter work roll without breaking the shape of the L warp converged by the small diameter work roll. In order to satisfy this condition, the radius of curvature of the steel plate formed by the last three rolls, that is, the radius of curvature of the steel plate when passing through the eighth roll (roll No. 8) is set as a small diameter work roll. It is necessary to make it larger than the radius of curvature of the steel plate when using.
Therefore, it can be seen from FIG. 3 that the diameter of the large-diameter work roll should be 100 mm or more in order to satisfy the above conditions.
However, even if the diameter of the large-diameter work roll is increased, the roll may bend depending on the rigidity, and the L-warp correction effect by the large-diameter work roll may not be obtained.

Therefore, the relationship between the diameter of the above-described eighth roll, the radius of curvature of the steel sheet, and the roll deflection was examined. The result is shown in FIG. 4 indicates the relationship between the roll diameter and the radius of curvature of the steel sheet, and the ♦ mark indicates the relationship between the roll diameter and the amount of deflection of the roll. In FIG. 4, an approximate line for each plot point is also shown.
Here, in order to obtain the correction effect of the L warp by the large-diameter work roll, the condition that the roll deflection (rigidity) is 150 μm or less is necessary. In order to satisfy this condition, it can be seen from FIG. 4 that the diameter of the large diameter work roll should be 140 mm or more.
Note that the upper limit of the diameter of the large-diameter work roll is preferably 200 mm or less due to the limitation of installation space.

From the numerical analysis described above, it has been found that when the diameter of the small-diameter work roll is 40 mm, the diameter of the large-diameter work roll is preferably 140 mm or more and 200 mm or less.
Therefore, when the ratio of the small diameter work roll to the large diameter work roll is taken, the diameter of the large diameter work roll is 3.5 to 5 times the diameter of the small diameter work roll (preferably, the lower limit is 4 times and the upper limit is 4.5 times).
Thereby, the large-diameter work roll capable of obtaining the L warp correction effect can be installed on the tension roller leveler without being limited by the installation space.

Then, the curvature correction method using the tension roller leveler which concerns on one embodiment of this invention is demonstrated.
As shown in FIG. 1, the steel plate 11 is stretched by the stretching device 12 while being horizontally transported by a plurality of rolls 44 attached and fixed to the upper base 21 a of the tension roller leveler 10. The thickness of the steel plate 11 is, for example, about 0.1 to 3 mm.
At this time, the C warp generated in the steel plate 11 is corrected by the C warp correction device 13 disposed on the downstream side of the stretching device 12, and then is corrected by the L warp correction device 14 disposed on the downstream side of the C warp correction device 13. The L warp generated in the steel plate 11 is corrected. Hereinafter, correction of L warpage will be described.

First, the steel plate 11 in which the correction of the C warpage has been completed is continuously conveyed horizontally between the six small diameter work rolls 29 to 34.
At this time, by making the upper end position of the entry-side jack 42 higher than the upper end position of the exit-side jack 43, the entry side of the L warp correction device 14 is placed under a strong pressure and the exit side is placed under a light pressure. Specifically, the reduction amount of the small-diameter work roll 30 on the entry side is, for example, about 2 to 5 mm, and the reduction amount of the small-diameter work roll 34 on the exit side is, for example, about -0.5 to 1.5 mm. Adjust each.
As a result, the steel plate 11 is tilted down, and the L warp generated in the steel plate 11 is gradually reduced, for example, to converge within a range of −15 × 10 ⁻⁵ mm to 15 × 10 ⁻⁵ mm. Warpage can be left on the lower side (one side) in the thickness direction of the steel plate 11 on the exit side of the work rolls 29 to 34 (see FIGS. 8 and 9).

As described above, the steel plate 11 that has been corrected by the six small-diameter work rolls 29 to 34 is continuously conveyed horizontally between the three large-diameter work rolls 35 to 37.
At this time, the steel plate 11 is corrected by giving a warp on the opposite side to the warp left on the exit side of the small diameter work rolls 29 to 34. At the time of this correction, a method of adjusting the reduction amount of the large-diameter work roll and a method of adjusting the pitch width in the conveying direction of the steel plate 11 can be used according to the amount of remaining L warpage.
First, a method for adjusting the amount of reduction of the large-diameter work roll will be described with reference to FIG. FIG. 5 shows the result of numerical analysis of the relationship between the reduction amount and the L warp in the large diameter work roll 36 located above the steel plate 11. In FIG. 5, the positive value of the L warp indicates the amount of the L warp directed downward, and the negative value indicates the amount of the L warp directed upward.

In performing this numerical analysis, the diameter of the large-diameter work roll was set to 180 mm. Further, the pitch width of the steel plate 11 in the conveying direction, that is, the horizontal distance D1 between the axis of the large diameter work roll 35 and the axis of the large diameter work roll 36, and the axis of the large diameter work roll 36 and the large diameter workpiece. The horizontal distance D2 from the axis of the roll 37 was set to 100 mm and the same pitch width (D1 = D2) (see FIG. 2).
From FIG. 5, when the L warpage is about 3 × 10 ⁻⁵ mm, the L warpage can be adjusted to the zero point (portion surrounded by ○ in FIG. 5) by adjusting the reduction amount to 5 to 6 mm. You can see that there are conditions. This reduction amount can be adjusted in the range of 3 to 8 mm, for example, according to the amount of L warp left on the exit side of the small diameter work rolls 29 to 34 and the pitch width of each large diameter work roll.

Next, a method for adjusting the pitch width in the conveyance direction of the steel plate 11 will be described with reference to FIG. FIG. 6 shows the result of numerical analysis of the relationship between the pitch width of each large-diameter work roll 35 to 37 and the L warpage.
In performing this numerical analysis, the diameter of each large-diameter work roll was set to 180 mm. In addition, the amount of reduction of the large-diameter work roll 36 located above the steel plate 11 was 5 mm.
From FIG. 6, by adjusting the pitch width of each large-diameter work roll 35-37 between 90-95 mm, there is a condition that can adjust the L warp to the zero point (the part circled in FIG. 6). I understand. This pitch width can be adjusted in the range of 90 to 105 mm, for example, according to the amount of L warp left on the exit side of the small diameter work rolls 29 to 34 and the amount of reduction of the large diameter work rolls.

As described above, after the steel plate 11 is stretched by the stretching device 12 using the tension roller leveler 10 according to the present embodiment, the C warpage and the L warpage of the steel plate 11 are sequentially corrected, whereby the L of the steel plate 11 is corrected. It can be seen that the warp can be corrected and the quality can be further improved.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, it included in the rights scope of the present invention when configuring the tension roller level La of the part or combination present invention all of the respective embodiments and modifications described above.
Moreover, in the said embodiment, although demonstrated about the case where the curvature of the longitudinal direction of a steel plate was corrected, if it is a metal plate, it will not be limited to this, For example, a copper plate, a copper alloy plate, an aluminum plate, or The present invention can also be applied to an aluminum alloy plate or the like.

And in the said embodiment, although the case where two units | sets of the steel plate expansion | extension apparatus were installed was demonstrated, according to the length which the steel plate extends, one unit | set may be sufficient and three or more units | units may be sufficient.
Moreover, in the said embodiment, the arrangement | positioning position of the small diameter work roll located in an exit side is made into the upper direction of a steel plate among several small diameter work rolls, and the large diameter located in an entrance side among several large diameter work rolls The work roll was placed below the steel plate. However, the arrangement position of the small-diameter work roll positioned on the exit side can be set below the steel plate, and the arrangement position of the large-diameter work roll positioned on the entry side can be set above the steel plate.

Furthermore, in the said embodiment, the case where each small diameter work roll arrange | positioned under the steel plate was integrally raised by the entrance side jack and the exit side jack, and the amount of reduction was gradually reduced was demonstrated. However, the upper frame provided with each small-diameter work roll arranged above the steel plate is moved up and down by a jack or the like as an elevating means, so that each small-diameter work roll is lowered integrally, and the amount of reduction is gradually increased. It can also be made smaller.

10: tension roller leveler, 11: steel plate (metal plate), 12: extension device, 13: width direction warpage correction device, 14: longitudinal direction warpage correction device, 15: base table, 16, 17: roll, 18: upper frame , 19: lower frame, 20, 21: backup roll, 21a: upper mount, 22: jack, 23: upper roll, 24: lower roll, 25: upper frame, 26: lower frame, 27: backup roll, 28 : Jack, 29 to 34: Small diameter work roll, 35 to 37: Large diameter work roll, 38: Upper frame, 39: Lower frame, 40, 41: Backup roll, 42: Incoming jack, 43: Outgoing jack, 44: Roll

Claims (5)

In the tension roller leveler in which the metal plate extension device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the metal plate conveyance direction,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. the warpage left in the exit side to give warpage of opposite, possess a large-diameter work roll at least three odd number of correcting warpage generated in the longitudinal direction of the metal plate,
The large-diameter work rolls, a tension roller leveler in which reduction amount and said adjustable der Rukoto. In the tension roller leveler in which the metal plate extension device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the metal plate conveyance direction,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. the warpage left in the exit side to give warpage of opposite, possess a large-diameter work roll at least three odd number of correcting warpage generated in the longitudinal direction of the metal plate,
The large-diameter work rolls, a tension roller leveler in which the pitch width of the conveying direction of the metal plate and said adjustable der Rukoto. In the tension roller leveler in which the metal plate extension device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the metal plate conveyance direction,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. the warpage left in the exit side to give warpage of opposite, possess a large-diameter work roll at least three odd number of correcting warpage generated in the longitudinal direction of the metal plate,
Each small-diameter work rolls which are arranged below or above the metal plate, a tension roller leveler, wherein the inclined pressure can der Rukoto gradually reduce the reduction ratio and move integrally. In the tension roller leveler in which the metal plate extension device, the width direction warpage correction device, and the longitudinal direction warpage correction device are sequentially arranged in the metal plate conveyance direction,
The longitudinal warpage correction device is alternately arranged on both sides of the metal plate in the thickness direction, and gradually reduces the warp generated on the metal plate, leaving a warp on one side in the thickness direction of the metal plate on the exit side. An even number of small-diameter work rolls are alternately arranged on the downstream side of the small-diameter work roll and on both sides in the thickness direction of the metal plate, and the diameter is larger than the small-diameter work roll. the warpage left in the exit side to give warpage of opposite, possess a large-diameter work roll at least three odd number of correcting warpage generated in the longitudinal direction of the metal plate,
The diameter of the large diameter work rolls, a tension roller leveler according to claim 5 times or less der Rukoto 3.5 times the diameter of the small-diameter work roll. The tension roller leveler according to any one of claims 1 to 4 , wherein the number of the small-diameter work rolls is at least six.

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