JP3511796B2 - Control method of strip moving direction changing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a case where a strip-shaped material such as a steel strip is continuously subjected to a plurality of treatments, and the like. The present invention relates to a control method of a belt-shaped material advancing direction changing device guided by.

[0002]

2. Description of the Related Art When a plurality of treatments are continuously performed on a steel strip, there is a case where the traveling direction of the steel strip is changed between processing devices due to a layout problem of the entire equipment. And, as the belt-shaped material advancing direction changing device used at that time, it is provided with a floater in which a guide surface for ejecting a fluid is provided on the peripheral surface of the cylindrical body,
There is a device in which a band-shaped material is spirally wound around the guide surface and guided in a floating state (see Japanese Patent Laid-Open No. 6-340360, etc.).

[0003]

However, in this apparatus, since the steel strip is guided while being spirally bent, the steel strip tends to have a shape with a small bending strain due to rigidity, particularly in the case of a steel strip having a large plate thickness. You will be guided in a twisted state. That is, as shown in FIG. 12, the design pass line L ₀ in which the pass line of the steel strip S is parallel to the peripheral surface of the cylindrical body 1 forming the floater.
Therefore, it shifts to the twisted pass line L ₁ which is not parallel to the peripheral surface. At that time, in the plate width direction of the steel strip S (the direction along the axial direction of the cylindrical body 1), there is a difference in the flying height from the peripheral surface of the cylindrical body 1 (point A <point B), and the flying height is small. At (point A), the steel strip S may come into contact with the peripheral surface of the cylindrical body 1.

Therefore, it is effective to wind the steel strip around the floater in a state in which the fluid ejection amount on the side where the levitation amount becomes small is made larger than that at the side where the levitation amount becomes large so that the above-mentioned difference in levitation amount does not occur. However, when the steel strip to be passed is a plate with different rigidity connected, the switching timing between the fluid ejection amount control according to the preceding sheet material and the fluid ejection amount control according to the succeeding sheet material Is difficult.

For example, when the preceding material has a higher rigidity than the succeeding material, if the fluid ejection amount is controlled according to the difference in the flying height expected for the preceding material until the connecting portion is separated from the floater, Since the difference in the flying height expected for the material is smaller than that for the preceding material, the following problems may occur.

That is, as shown in FIG. 13, since the flying height is small, the side on which the fluid ejection amount is largely controlled (point A).
Then, on the side (point B) where the control amount is too large and the flying amount is too large, and the flying amount is too large, the fluid ejection amount is controlled to be small (the point B), and the flying amount becomes too small. At the point B side, the steel strip may come into contact with the peripheral surface of the cylindrical body. In FIG. 13, time t
₁ indicates the time when the connecting portion between the preceding material and the following material reaches the guide surface of the floater. Time t ₃ is the time after the connecting portion has come out of the guide surface and is switched to the fluid ejection amount control according to the difference in the flying height expected for the succeeding material. Also, at time t ₁
Immediately after that, the point where the line showing the flying height on the side of point B intersects the horizontal axis shows the contact between the steel strip S and the circumferential surface of the cylindrical body.

The present invention has been made paying attention to such a point, and in a belt-shaped material advancing direction changing device which changes the advancing direction while spirally guiding the belt-shaped material in a floating state by jetting fluid. An object of the present invention is to appropriately control the ejection amount of a fluid even when a strip-shaped material in which plate materials having different rigidity are connected is passed.

[0008]

In order to solve the above-mentioned problems, the invention of claim 1 is provided with a floater provided with a guide surface for ejecting fluid on the peripheral surface of a cylindrical body, and a band-shaped member is provided on the guide surface. In a control method of a belt-shaped material advancing direction changing device that changes the advancing direction of a belt-shaped material by spirally winding and guiding the material in a floating state, a fluid jet is ejected to at least one of the belt-shaped material advancing portion and the retreating portion of the guide surface. Providing flow rate adjusting means for individually adjusting the amount so that there is a difference on both sides in the width direction of the strip-shaped material,
In the case where a strip-shaped material in which plate materials having different rigidity are connected is threaded, from the time the connection portion reaches the guide surface until it exits,
A control method of a belt-shaped material advancing direction changing device characterized by controlling the flow rate adjusting means so as to perform a flow rate adjustment between a flow rate adjustment according to a preceding plate material and a flow rate adjustment according to a subsequent plate material. provide.

According to a second aspect of the present invention, in the method of the first aspect, the flow rate adjustment according to the preceding plate material to the flow rate adjustment according to the subsequent plate material is continuously performed from the time when the connecting portion reaches the guide surface to the time when it exits. It is characterized in that the flow rate adjusting means is controlled so as to adjust the flow rate that changes with time.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing a belt-shaped material advancing direction changing device to which a method corresponding to an embodiment of the present invention is applied, and FIG. 2 is a schematic side view showing the arrangement of the device and the belt-shaped material. .

As shown in these figures, the guide surface 2 that makes the surfaces of the steel strip S face each other is located at the same axial center portion of one semicircular surface 11 of the cylindrical body 1 and has the same center line. The spiral of the book is provided as an outer shape line 21 in the width direction and is provided with a predetermined width (a size sufficiently larger than the width of the guided steel strip S) in the axial direction. A large number of through holes (fluid ejection ports) are provided on the entire surface of the guide surface 2. Such a guide surface 2 is formed, for example, by forming a portion corresponding to between the two outlines 21 of the cylindrical body 1 with punching metal.

Further, a fluid (a gas such as air or a liquid) is introduced into the cylindrical body 1 at a predetermined pressure by a fluid introducing device (not shown), and the introduced fluid is introduced into the guide surface 2 from the inside of the cylindrical body 1. It is designed to be ejected toward the surface of the steel strip S through the through hole. The fluid in the cylindrical body 1 is jetted from the entire guide surface 2 at the same pressure. Then, the steel strip S spirally wound around the guide surface 2 is guided in a spiral state in a floating state by the jet fluid from the guide surface 2, so that the traveling direction is changed.

On the other hand, in the cylindrical body 1, on both sides of the guide surface 2 in the widthwise direction of the guide surface 2 at the starting point 2a side (strip material entering portion) and the end point 2b side (strip material exiting portion) in the traveling direction of the steel strip. A plate which is bent with a curvature along the inner peripheral surface of the cylindrical body 1 at the positions (4 places) where the contour lines at both ends in the width direction are formed to be the same as the spiral contour line 21 of the guide surface 2. Shaped cover 3a
~ 3d are provided. The covers 3a to 3d are for individually closing the respective widthwise end portions of the guide surface 2 on the start point side and the end point side.

Each of the covers 3a to 3d is a cylindrical body 1.
A hydraulic cylinder 4 having a cylinder portion 41 fixed at a predetermined position therein allows the cylinder body 1 to move in the axial direction. The cylinder portion 41 of the hydraulic cylinder 4 is fixed to, for example, a bracket projecting from the inner surface of the cylindrical body 1, and the tip of the rod portion 42 has the end faces in the width direction of the covers 3a to 3d (the end face opposite to the guide face). The end face is pushed and pulled by advancing and retracting the hydraulic cylinder 4, so that the width of closing the guide face 2 by the covers 3a to 3d is changed.

Therefore, by setting the widths of the two covers 3a, 3b installed on the starting point side of the guiding surface 2 to close the guiding surface 2 to different values, the axis of the cylindrical body 1 on the starting point side of the guiding surface 2 can be set. The amount of fluid jetted to both ends of the steel strip S along the direction can be made different. That is, both ends of the steel strip S along the axial direction of the cylindrical body 1 in this embodiment correspond to the widthwise both sides of the strip-shaped material in the present invention. Similarly, by setting different widths for closing the guide surface 2 by the covers 3c and 3d on the end point side of the guide surface 2, the guide surface 2
On the end point side of, the amount of fluid jetted to both ends of the steel strip S along the axial direction of the cylindrical body 1 can be made different.

Here, on the starting point side and the ending point side of the guide surface 2,
At each position, the introduction or derivation angle of the steel strip S is an obtuse angle θ.
₁Side (obtuse angle side) B and acute angle θ₂Side (sharp side)
With A, the flying height on the acute angle side A is dull depending on the rigidity of the steel strip S.
It becomes smaller than the flying height on the corner side B. Therefore, the rigidity of the steel strip S
Difference in flying height between acute angle side A and obtuse angle side B
The amount of fluid ejected on the acute angle side A is proportional to the amount of twist.
The cover is placed on the acute angle side A so that it is more than the obtuse angle side B.
Width H that closes the guide surface 2 by the bars 3a and 3d_a, H _dTo
Guide surface 2 by covers 3b and 3c arranged on obtuse angle side B
Width H to close_b, H _CMake it smaller. For example, in FIG.
As shown in (a), the fluid jet located below the steel strip S
The obtuse angle side B closes the mouth (guide surface 2) with a predetermined width, and the acute angle side A
Then try not to block it. As a result, the acute angle side A and the obtuse angle
Since the flying height of the steel strip S is the same on side B,
The steel strip S is not twisted.

On the other hand, in this embodiment, as shown in FIG. 2, a plate thickness change point (welding point) detector 5 is provided at a position which is a predetermined distance before the starting point 2a of the guide surface 2, and is, for example, illustrated. By the control device which is not provided, each of the covers 3a to 3 from the plate thickness change point detection signal from the plate thickness change point detector 5 is detected.
The movement amount of the hydraulic cylinder 4 fixed to d is controlled.

That is, when the plate thickness change point detector 5 detects a change point of the plate thickness (a connecting portion of the plate materials S ₁ and S _{2 having} different plate thicknesses), the time when the change point reaches the starting point 2a of the guide surface 2 t
₁ , the block widths of the guide surface 2 on the obtuse angle side and the acute angle side corresponding to the plate material S ₁ up to then are calculated from the values corresponding to the plate material S ₁ .
Each hydraulic cylinder 4 is adapted to move so as to be changed to a value between a value corresponding to the plate material S ₁ and a value corresponding to the plate material S ₂ . After that, this change point is tracked, and at time t ₂ when this change point leaves the end point 2b of the guide surface 2, the closing widths of the guide surface 2 on the obtuse angle side and the acute angle side are changed to values according to the plate material S _2. As described above, each hydraulic cylinder 4 is adapted to move.

FIG. 1A shows a state in which the fluid ejection amount is controlled according to the plate material S ₁ , and FIG. 1C shows a state in which the fluid ejection amount is controlled according to the plate material S ₂ . 1 (b)
Shows a state in which the fluid ejection amount is controlled when the plate thickness change point α is on the guide surface 2 between these states. In this example, the plate material S ₁ is a steel strip having a plate thickness of 0.8 mm, and the plate material S ₂ is the same type of steel strip having a plate thickness of 0.2 mm, both having a plate width of 1000 mm and a flying height of 10 mm. There is.

Steel strip S having a plate thickness of 0.8 mm₁Has high rigidity
As kinking becomes a problem, as shown in Figure 1 (a), levitating
Due to the large amount difference, only the obtuse side B is covered by the covers 3b and 3c.
Obi S ₁The guide surface 2 (fluid ejection port) located below
It is necessary to close it, but if the plate thickness is as thin as 0.2 mm, the rigidity will increase.
Since the twist can be neglected a little, Fig. 1 (c)
As shown in Fig. 3, the guide surface 2 is closed by the covers 3a to 3d.
All widths are the same. Then, the plate thickness change point α is the guide surface 2
While it is on top, as shown in FIG. 1B, each cover 3a
The closing width of the guide surface 2 by ~ 3d is the same as that in the case of FIG. 1 (a).
The average value in the case of FIG.

[0021] By doing so, as shown in FIG. 3, at time t ₁ ~t ₂ subjected to intermediate fluid ejection amount control as in the case of the plate S ₁ and the plate S _2, the guide surface 2 There is no significant difference between the flying height on the acute angle side A and the flying height on the obtuse angle side B on the start side and the end point side of the steel strip S and the circumferential surface of the cylindrical body 1 (guide surface) on either side. It is possible to prevent contact with 2).

Further, if the cover width of the guide surface 2 by each cover is continuously changed from the value in the case of the plate material S ₁ to the value in the case of the plate material S _{2 at} the times t _{1 to} t ₂ , As shown in FIG. 4, since it is possible to prevent the flying height on the acute angle side A and the flying height on the obtuse angle side B from largely changing, the traveling direction can be changed while the steel strip S is stably passed. preferable.

In the above-described embodiment, while the plate thickness changing point α is on the guide surface 2 of the floater, the closing width of the guide surface 2 by each of the covers 3a to 3d is set in the case of the preceding material and the case of the succeeding material. Although the average value is used, the value is not limited to this as long as it is a value between the values in each case, and an appropriate value may be selected according to the difference in rigidity between the preceding material and the following material.

Further, in the above embodiment, as the flow rate adjusting means, the covers 3a to 3d which cover both end portions in the width direction of the guide surface 2 from the inside of the cylindrical body 1 and are movable in the axial direction of the cylindrical body 1 are used. However, the moving direction of the covers 3a to 3d may be a direction along the spiral of the guide surface 2 as shown in FIG.
Further, although the hydraulic cylinder 4 is used as the moving means of the covers 3a to 3d, instead of this, for example, a pneumatic cylinder, a rack and pinion, a linear motor or the like may be used.

As the flow rate adjusting means other than the above-mentioned embodiment, there may be mentioned one provided with a large number of hinged opening / closing plates 10 along the axial direction on the inner peripheral wall of the guide surface 2 as shown in FIG. Thereby, for example, by opening the opening / closing plate 10 in order from the width direction center side of the guide surface 2 at a predetermined opening degree,
The amount of fluid ejected at each end of the guide surface 2 in the width direction is adjusted.

Further, as shown in FIG. 7, separate fluid supply pipes 11 are provided on the acute angle side A and the obtuse angle side B, and the fluid is jetted from the nozzle 12 provided at the tip thereof toward the lower surface of the steel strip S. It may have a structure. In this case, the flow rate adjusting valve 13 is interposed in the fluid supply pipe 11 and the flow rate adjusting valve 13 is adjusted to eject fluids having different pressures on the acute angle side A and the obtuse angle side B.

Further, in the above-mentioned embodiment, the inside of the cylindrical body 1 is used as one common chamber, and the fluid is supplied into the chamber to uniformly eject the fluid from all the fluid ejection ports formed on the guide surface 2. However, instead of this, as shown in FIGS. 8 and 9, the guide surface 2 is divided into two regions in the width direction and the steel strip traveling direction to be divided into four regions, and the chambers 14a which are independent in each region are provided. 14d may be provided in the cylindrical body 1 and the amounts of fluid ejected from the chambers 14a to 14d may be differentiated. Further, in this case, the chambers 14a and 14d on the acute angle side A and the chambers 14b and 14c on the obtuse angle side B may be common chambers.

In FIGS. 10 and 11, the steel strip traveling direction of the guide surface 2 is divided into a starting point side, an intermediate position, and an end point side, and the starting point side and the end point side are divided into an acute angle side A and an obtuse angle side B. The guide surface 2 may be divided into five regions, and independent chambers 15a to 15e for each region may be provided in the cylindrical body 1 so that the amount of fluid ejected from each region can be individually controlled.
By doing so, twisting of the steel strip S can be prevented by providing a fluid ejection amount difference that cancels out the flying amount difference assumed on the acute angle side A and the obtuse angle side B, and the flying amount at the intermediate position can be set as the starting point. It is possible to make the flying height uniform over the entire guide surface 2 by setting appropriate values according to the side and the end point side, so that it becomes possible to more stably change the traveling direction by the floater.

Further, in the above-described embodiment, the control is performed so as to make the fluid ejection amount different between the acute angle side A and the obtuse angle side B on both the start point side and the end point side of the guide surface 2, but only one of them is used. You may go in. In that case, control on the end point side of the guide surface 2 is more effective in preventing twisting of the steel strip.

Further, in the above-mentioned embodiment, as the strip-shaped material to which the plate materials having different rigidity are connected, the steel strips having different plate thicknesses are connected, but the difference in rigidity is caused also by the difference in material. Also, when a strip-shaped material in which plate materials of different materials are connected is passed, the flow rate adjusting means may be similarly moved.

[0031]

As described above, according to the method of the present invention, since the fluid ejection amount is appropriately controlled while the connecting portion of the plate materials having different rigidity is on the guide surface of the floater, the rigidity is different. It is possible to stably change the traveling direction of the belt-shaped material connected with the plate materials by the belt-shaped material traveling direction changing device including the floater.

In particular, according to the method of claim 2, there is an effect that it is possible to more stably change the advancing direction of the belt-shaped material connected with the plate materials having different rigidity by the device.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a strip material traveling direction changing device to which a method corresponding to an embodiment of the present invention is applied,
(A) shows a state where the preceding plate material S ₁ is guided by the device, (b) shows a state where the connecting portion α is guided,
(C) shows the state in which the subsequent plate S ₂ is guided.

FIG. 2 is a schematic side view showing the arrangement of the belt-shaped material traveling direction changing device and the belt-shaped material of FIG.

In one embodiment of the present invention, the flying height on the acute angle side A and the flying height on the obtuse angle side B at the start point side and the end point side of the guide surface at times t _{1 to} t ₂ when the connecting portion is guided. It is a graph which shows.

In another embodiment of the present invention, the flying height on the acute angle side A and the levitation on the obtuse angle side B at the start point side and the end point side of the guide surface at times t _{1 to} t ₂ when the connecting portion is guided. It is a graph which shows quantity.

FIG. 5 is an explanatory diagram showing another example of the flow rate adjusting means.

FIG. 6 is an explanatory diagram showing another example of the flow rate adjusting means.

FIG. 7 is an explanatory diagram showing another example of the flow rate adjusting means.

FIG. 8 is an explanatory diagram showing another example of the flow rate adjusting means.

9 is a schematic vertical sectional view of FIG.

FIG. 10 is an explanatory diagram showing another example of the flow rate adjusting means.

11 is a schematic vertical sectional view of FIG.

FIG. 12 is an explanatory view showing a twist generated in a steel strip guided by a floater.

FIG. 13: In the conventional example, the flying height and obtuse angle on the acute angle side A at the start point side and the end point side of the guide surface at time t ₃ after leaving the guide surface from the time t ₁ when the connecting portion reaches the guide surface. Side B
5 is a graph showing the flying height of the.

[Explanation of symbols] 1 cylindrical body 2 guideway 2a Start point of guide surface (entrance of strip) 2b End point of guide surface (exit part of strip) 3a-3d cover (flow rate adjusting means) 4 Hydraulic cylinder (flow rate adjusting means) 11 semicircular surface S Steel strip (strip material) α connection part

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadaaki Yakusaku 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works (56) Reference JP-A-51-25274 (JP, A) JP-A 6-340360 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65H 23/32 B21B 39/20 B21D 43/00 B65H 20/14 B65H 23/032

Claims (2)

(57) [Claims] 1. A traveling direction of a strip-shaped member comprising a floater having a guide surface for ejecting a fluid provided on a peripheral surface of a cylindrical body, and spirally winding the strip-shaped member around the guide surface to guide the strip-shaped member in a floating state. In the control method of the strip material advancing direction changing device, the fluid ejection amount is individually adjusted to at least one of the strip material advancing portion and the retreat portion of the guide surface so that a difference is produced between the strip material widthwise both sides. When a band-shaped material in which plate materials having different rigidity are connected is passed through by providing a flow rate adjusting means, the flow rate is adjusted according to the preceding plate material from the time when the connection portion reaches the guide surface until it exits. A control method for a strip-shaped material advancing direction changing device, characterized in that the flow rate adjusting means is controlled so as to perform a flow rate adjustment between a flow rate adjustment according to a subsequent plate material. 2. The flow rate adjustment that continuously changes from the flow rate adjustment according to the preceding plate material to the flow rate adjustment according to the subsequent plate material during the period from when the connecting portion reaches the guide surface until it exits. The control method of the belt-shaped material advancing direction changing device according to claim 1, wherein the flow rate adjusting means is controlled.