JPS61169110A - Method and device for controlling sheet-camber of rolling stock - Google Patents

Abstract

PURPOSE:To prevent the sheet camber of a rolling stock and to obtain a product of excellent quality by using a processing means for offsetting a work roll based on the data, etc. of the previously set rolling conditions and the amount of sheet camber of a rolling stock. CONSTITUTION:The work roll 1 of one side of work rolls 1, 2 is enabled to offset in the direction parallel to the advancing direction of a rolling stock 6 by a hydraulic cylinder 5. A processing unit 8 obtains the required amount of offset based on the data 11 of a work roll diameter and a pass schedule, etc. obtained from a process computer to transmit a command sginal to a servovalve 10. The servovalve 10 controls the flow rate of a pressurized fluid from a pump tosupply it to the hydraulic cylinder 5. The cylinder 5 is actuated by the liquid to offset the roll 1 to the direction of rolling line by a prescribed amount. In this way, the sheet-camber of a clad sheet is easily prevented, and this method can be applied to all rolling mills.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for controlling warp of a rolled material, which can prevent warpage of a rolled material.

[Conventional technology]

If there is a warpage in the finished rolled material, it is difficult for the rolled material to enter the leveler, difficult to shear in subsequent processes, processing on the finishing line, and conveyance, and it is not good in terms of product quality. There are problems such as.

[Problem that the invention seeks to solve]

However, in the conventional means, there was no means for effectively preventing board warpage.

The present invention has been made in view of the above circumstances, with the object of making it possible to easily control board warpage.

[Means for solving problems]

In the present invention, the rolled material is rolled by offsetting at least one of a pair of work rolls in a direction parallel to the rolling material progress direction, and the warping of the rolled material is opposite to that which occurs when rolling is performed without offset of the work rolls. The plate warpage is given to the entire rolling side.

[For production]

Therefore, in the present invention, a plate warp that is opposite to the plate warp when rolling is performed without offset of the work rolls is provided, thereby canceling the plate warp of the rolled material.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 shows one embodiment of the present invention, in which (]) (2) is a work roll, (31 (4) is a backing roll, and the work roll (]) is a rolled material by a fluid pressure cylinder (5). (6) can be offset in a direction parallel to the traveling direction of the fluid pressure cylinder (5).Also, the signal pressure detected by the position detector (7) which detects the position of the piston rod of the fluid pressure cylinder (5) is detected by the high process computer. Data (11) such as the work roll diameter and cutting schedule can be input to the arithmetic and control device (8), and from the arithmetic and control device (8), a pump (9) is used to pump the fluid pressure cylinder. A command signal can be output to a servo valve (10) that controls the amount of pressurized liquid fed to (5).

During rolling, the work roll diameter is determined from the process computer.
Data such as path schedule (01) is sent to the arithmetic and control unit (8).
), and based on these data (11), the arithmetic and control unit (8) calculates the work roll (]) from the board warpage prediction formula.
(2) is calculated when rolling is performed without offset, and the offset amount e necessary to prevent the sheet warpage is calculated, and the result is sent as a command signal to the servo valve 00). The amount of pressurized liquid from the pump (9) is controlled by the servo valve 00) and supplied to the fluid pressure cylinder (5), and the fluid pressure cylinder (5) is operated to move the work roll (1) in the direction of the rolling line. is offset by a predetermined amount.

When rolling is performed in such a state, the rolled material (6) is given a warpage in a direction that cancels out the warpage that occurs when rolling is performed without using the work roll (1) in the off-seller 1-1. The subsequent rolled material (6) becomes straight. For this reason, rolled material (6
) also has no risk of being caught by rollers, etc. when passing through a leveler etc. in the post-process, and processing in the post-process is easy, and the product quality is also good. If rolling is performed without offsetting the work roll (1), and a downward convex warpage occurs in the rolled material (6), move the work roll (1) in the direction of movement of the rolled material (6). On the other hand, if rolling is performed with an offset toward the downstream side, the warpage of the rolled material (6) can be canceled out. This is because the advanced area on the work roll (1) side shifts to the downstream side of the rolled material (6), causing an upward convex warp in the rolled material (6), which cancels out the warpage. It is.

Fig. 2 shows another embodiment of the present invention, which differs from the previous embodiment in that there is a sheet warp detector (1) such as a shape meter on the exit side of the rolling mill.
2) is arranged so that the warped state of the rolled material (6) after rolling can be detected and fed back to the arithmetic and control device (8). By feeding back the board warp state in this way, the arithmetic and control unit (8) uses the signal detected by the board warp detector (12) to prevent the work roll (1) from warping and straightening the board. ) is controlled in a closed loop than in the case of FIG. 1, so that a straighter rolled material can be obtained.

In the embodiments of the present invention, the case where the upper work roll is offset has been explained, but it is also possible to offset the lower work roll or the upper and lower work rolls, and the fluid pressure Rather than providing one set of cylinders for the work roll to be offset, two sets of cylinders may be provided before and after the work roll to be offset, and other various changes may be made within the scope of the invention. , etc., of course.

〔Effect of the invention〕

According to the present invention, since plate warpage can be controlled arbitrarily, it is possible to prevent the plate warpage of the rolled material and straighten it, and as a result, the rolled material can be easily processed in the post-process. It is possible to obtain products of good quality, and it has various excellent effects such as being particularly effective in rolling clad materials and being applicable to all rolling mills.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of one embodiment of the present invention, and FIG. 2 is an explanatory diagram of another embodiment of the present invention. In the figure (+1 (2+) is the work roll, (5) is the fluid pressure cylinder, (6) is the rolled material, (7) is the position detector, (8) is the arithmetic control unit, 00) is the servo valve, and 01) is data, (1
The figure shows a board warp detector.

Claims (1)

[Claims] 1) Rolling of a rolled material by offsetting at least one of a pair of work rolls in a direction parallel to the rolling direction of the rolled material, and sheet warping that occurs when rolling is performed without offsetting the work rolls. A method for controlling plate warpage of a rolled material, characterized by applying a plate warp in the opposite direction to that of the rolled material. 2) A means for offsetting at least one of the pair of work rolls in the rolling material progressing direction, a control valve for controlling the pressure fluid supplied to the offsetting means, and preset data such as roll diameter and pass schedule. Warpage of a plate of a rolled material, characterized in that a calculation control device is provided which calculates the amount of warpage of the rolled material from the amount of warpage of the rolled material, calculates the amount of offset of a work roll for canceling the warp, and issues a command to the control valve. Control device.