JPS62197208A - Method and device for forming and controlling edge of metal plate - Google Patents

Abstract

PURPOSE:To obtain high quality rolled stocks having rectangular shape edge surfaces without meanders by detecting a pressing force in the plate width direction of a right and a left edger roll forming edges positioned right under a screw-down device of a rolling mil and controlling a right and a left rolling screwdown force to make a right and a left pressing force equal. CONSTITUTION:Both edges of a rolled stock 3 bitten and extended to the full roll width by shift of work rolls 1 and 2 are pressed by edger rolls in the rolling direction positioned right under the work rolls 1 and 2 and edge surfaces 23 are formed into a rectangular shape. A right and a left pressing force P1 and P2 are detected by a pressing force adjusting device 9 through a pressing force detector 25. A difference DELTAP between the pressing forces P1 and P2 is obtained by a proportional arithmetic element 26 and a screwdown adjusting device controls a right and a left screwdown device so as to make the DELTAP zero. In this method, meanders of the stock 3 are eliminated and the stock 3 has a good rectangular edge surfaces 23 with the highly accurate plate width.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for controlling edge forming of a metal plate.

[Prior Art] When a plate is flat rolled by a rolling mill, edge drops occur at the widthwise ends of the plate a due to bending of the rolls, etc., as shown in FIG. 6(a), and the plate is restrained in the width direction. This causes radial flow and increases edge drop. In addition, the quality of the product deteriorates, such as a decrease in sheet width accuracy and a deterioration in the shape of the sheet width edge, which causes problems such as a decrease in yield.

For this reason, conventional tapered rolls and edgers are used at the end of the body.
Accordingly, in the process before final flat rolling, the edges of the sheet are raised (edge-up) and then flat rolling is performed to reduce edge drops.

[Problems to be Solved by the Invention] However, even if the width of the plate is reduced using the above-mentioned edger for the purpose of reducing edge drop or improving the width accuracy of the plate, flat rolling for bookkeeping the plate is not possible. When machined, a large width return occurs, resulting in edge drops at the width ends of the plate a, as shown in FIG. 6(b), and a decrease in plate width accuracy.

FIG. 7 compares the state of change in sheet width when flat rolling is continuously performed after edgering with the result of full-pass flat rolling. Even if edgers are applied with width reduction amounts of 1E, 2E, and 3E, it is clear that when flat rolling is repeated, a width return Is, 28.3S occurs, approaching the result of all-pass flat rolling. The width reduction of the plate is performed with tension applied to the plate to prevent buckling, but there is a limit to the amount of width reduction due to buckling, and it is not possible to reduce the width by too much. In particular, when the width of the front and rear ends of the plate is reduced, the tension cannot be applied due to the loss of tension, so the width end of plate a remains with edge drops and sagging as shown in Figure 6 (a). It becomes. In addition, even if an attempt was made to detect the width reduction force in order to uniformly reduce the width of the left and right edges of plate a, it was not possible to accurately detect the width reduction force, especially in thin plates because the plate is prone to buckling. .

The present invention has been developed by focusing on these conventional problems, and is an edge forming technology that can uniformly form both ends into a rectangular shape even when the plate is meandering, even if it is a thin plate. is intended to provide.

[Means for solving the problems] The present invention attempts to solve the above technical problems, and
In an edge forming method in which both end faces in the width direction of a plate are pressed by edger rolls from left and right immediately below the rolling part of a rolling mill, the pressing (=I) by the edger rolls is
The present invention relates to a metal plate edge forming control method and apparatus, characterized in that the force is detected and the left and right rolling forces of a rolling mill are controlled so that the detected left and right pressing forces are equalized.

[Function] Therefore, in the present invention, the radial flow in the board width direction is reliably restrained by the edger roll immediately below the rolling down, and the rolling down at both width ends is always equalized by adjusting the left and right horizontal rolling forces. By adjusting the position of the plate in the width direction, it is possible to form a plate with an excellent edge shape.

[Implementation example] An embodiment of the present invention will be described below based on the drawings.

Fig. 1.2 shows an example of the present invention, in which the upper and lower work rolls 1, 2 are shifted to opposite sides in the axial direction, and one of the body ends of the upper and lower work rolls 1.2 is aligned with the width of the plate 3. In a rolling apparatus adapted to perform rolling according to the end surface, a width end restraining device 6 is provided between the shaft boxes 4 and 5 at the shaft ends of the upper and lower work rolls 1 and 2.

Regarding one of the width end restraining devices 6, this device 6 has a lower pulling roll mount 7 and an upper pressing roll mount 8. The pull roll mount 7 is attached to the push roll mount 8 by a pull adjustment device 10 so as to be adjustable in the roll axis direction, and the pull roll mount 7 is attached to the push roll mount 8 so as to be adjustable in the roll axis direction, thereby adjusting the relative position. can be changed.

Further, both the frames 7 and 8 can be fixed together with fixing screws 11. Further, the pulling roll mount 7 is supported by an elongated hole 12 and a support bolt 13 so as to be movable in the roll axis direction with respect to the lower axle box 5.

At the front and back positions in the traveling direction of the plate 3 at the tip of the pulling roll mount 7, there are pulling rolls 15 and 16 having grooves 14 on the outer periphery.
is horizontally rotatably mounted via a vertical shaft 17, and on the press roll pedestal 8 at a position outside the pull rolls 15 and 16 is a press roll 19. having a groove 18 on its outer periphery. 20 is rotatably mounted via a vertical shaft 21, and the rolls 15.16, 19.20 cause a disc roll 22 with a required diameter to move into the groove 14.1.
It is horizontally rotatably pressed and supported from four locations on the outer periphery via 8.

The disc roll 22 is pressed against and supported by the body end surface 23 of the upper work roll 1 while being in contact with the outer peripheral upper surface of the lower work roll 2 .

Further, the width end restraining device 6 is similarly constructed in a point-symmetric manner at both axial ends of the work roll 1.2.

According to the above, the width direction of the plate 3 can be restrained, but when the plate 3 meanders, the amount of width reduction on one side of the width end face of the plate 3 becomes abnormally large, and the amount of width reduction on the other side becomes abnormally large. A left/right imbalance occurs that is small or zero. For this purpose, the following control device is provided.

In the above configuration, the reaction force acting on the width end restraining device 6 via the pressing rolls 19, 20 is caused by the shaft 24 of the pressing adjusting device 9.
Therefore, a pressing force detection device 25 such as a strain gauge is provided on the shaft 24 to detect the pressing forces P+ and P2 of the pressing rolls 19 and 20. Furthermore, the detected pressing forces P+ and P2 are compared by a comparator 26 as shown in FIG. Reduction device 29
．． The rolling force of 30 is adjusted via the rolling adjustment device 31, thereby adjusting the widthwise position of the plate 3, and thus always rolling down both widthwise end surfaces of the plate 3 under the same conditions to obtain a good edge shape. It is made to be moldable.

In addition, the pulling roll 15.16 and the pressing roll 19°2
For example, as shown in FIG. 4.5, the pressing spring 32 is
, 33, the work rolls 1, 2 are supported by a required pressing force against the outer circumferential surfaces of the bodies. Incidentally, in place of the pressing springs 32 and 33, an actuator is provided to adjust the position of each roll 15.16° 19.20 in accordance with changes in the thickness of the plate 3 to automatically adjust the position or pressing force. You can also make it happen.

During rolling, the axle box 5 to which the width end restraint device 6 is attached is
In a state in which the axial positions of the upper and lower work rolls 1 and 2 are shifted and adjusted so that the side roll body end surface 23 coincides with the width end of the plate 3, the pulling roll 15 is adjusted by the pulling adjustment device 10.
．． Disc roll 22 between 16 and pressing roll 19 and 20
After being firmly supported, the outer periphery of the disc roll 22 is supported by the pressing adjustment device 9 so as to be pressed against the body end surface 23 of the work rolls 1 and 2, and the plate 3 is rolled in this state.

At this time, the plate 3 tries to extend in the longitudinal direction and the width direction by rolling down, but the disc roll 22
Because it is constrained by Furthermore, by shifting the upper and lower work rolls 1 and 2, rolling is performed so that the body end face 23 coincides with the widthwise end of the plate 3, thereby suppressing the bending of the rolls and preventing edge drops at the ends of the plate 3. It can be prevented.

In addition, when the plate 3 meanders in the above, the pressing force of the left and right disc rolls 22 changes, which causes the detection device 25
is detected, the difference between the left and right pressing forces is calculated by the comparator 26, and based on the difference, the left and right rolling forces by the rolling down devices 29 and 30 are adjusted by the rolling down adjustment device 31, and the meandering of the plate 3 is corrected. be done.

Therefore, both ends of the plate 3 in the width direction are always uniformly lowered in width by the disc rolls 22, so that no abnormal load is applied to one of the width end restraint devices, as shown in FIG. 6(c). It is possible to roll a plate 3 having a rectangular shape and having high width dimension accuracy as shown in FIG. Therefore, it is possible to improve product quality and yield.

Note that the present invention is not limited to the above-mentioned embodiments, and the width end restraint device may be mounted on a shift block other than the roll axle box to improve operability during roll conversion, or may be mounted on a bar shifter. In the case of the system, it is possible to place it on a bar and adjust the movement by itself, the drive system of the adjustment device that performs pushing and pulling can be selected from various types, it is not limited to the system of shifting rolls, and It goes without saying that the force detection method, detection position, etc. can be arbitrarily selected, and that various changes can be made without departing from the gist of the Ikensui idea.

[Effects of the Invention] As described above, according to the method and apparatus for controlling the edge forming of a metal plate of the present invention, the width edge of the plate is held down by the edge roll of the width edge restraining device immediately below the rolling of the work roll. , it is possible to reliably restrain the radial flow in the width direction of the plate without buckling the plate, and the horizontal reduction force on the left and right sides can be adjusted according to the load acting on the left and right width edge restraint devices. This prevents meandering of the plate and controls the rolling reduction amount at both ends in the width direction to always be equal, making it possible to roll high-quality plates with rectangular shapes that are always uniform at both ends. It can have a great effect.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
3 is an overall front view showing the outline of the present invention,
Fig. 4 is a sectional view showing details of the pressing roll, Fig. 5 is a sectional view showing details of the pulling roll, Fig. 6 is a diagram showing the shape of the rolled plate, and Fig. 7 is a flattening after width reduction. It is an explanatory diagram for showing width return by rolling. 1 is the upper work roll, 2 is the lower work roll, 3 is the plate, 4
, 5 is an axle box, 6 is a width end restraint device, 7 is a pulling roll mount,
8 is a pressing roll frame, 9 is a pressing adjustment device, 10 is a pulling adjustment device, 11 is a fixing screw, 13 is a support bolt, 15.1
6 is a pulling roll, 19.20 is a pressing roll, 22 is a disc roll, 23 is a body end surface, 25 is a pressing force detection device,
26 is a comparator, 29.30 is a reduction device, and 31 is a reduction adjustment device.Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Scope of Claims] 1) In an edge forming method in which edger rolls press both end faces in the width direction of a plate from left and right directly below the rolling part of a rolling mill, the pressing force by the respective edger rolls is detected. A method for controlling edge forming of a metal plate, comprising controlling the rolling force on the left and right sides of a rolling mill so that the detected pressing forces on the left and right sides are equalized. 2) Immediately below the rolling part of the rolling mill, a width edge restraining device is provided to press and support edger rolls on both end surfaces in the width direction of the plate, and the pressing force acting on each of the width edge restraining devices is detected. A comparison calculator for comparing the detected pressing forces from both the detection devices, and a reduction adjustment device for controlling the reduction force of the left and right reduction devices of the rolling mill based on the signal from the comparison calculation unit. A metal plate edge forming control device characterized by: