JPS6156715A - Method and equipment for roll bending - Google Patents

Abstract

PURPOSE:To reduce the generation of roll marks by providing a double-chock bending device to the axial end of a work roll and supporting horizontally the roll by bringing short-body rolls into contact with the middle part of the roll. CONSTITUTION:Both axial ends of a work roll 1 are mounted on chocks 2, 3 respectively, and horizontal cylinders 4, 5 are connected to the chocks respectively by directing the cylinders 4, 5 to mutually opposite directions. Further, proper mumber of short-body rolls 6 are arranged at desired intervals at the middle part of work roll 1 to connect a cylinder 7 to each roll 6. When the roll 1 is provided with horizontal bending, the roll 1 is bent in the form of double bending system by operating respective cylinders 4, 5; and further, the rolls 6 are brought into contact with the middle part of roll 1 in accordance with the deflection curve of roll 1 by operating each cylinder 7 separately. In this way, the contacting surface pressure of each short-body roll 6 is reduced, and the generation of roll mark is also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a roll bending method and apparatus in a rolling mill (-) equipped with a steam-equipped rolling mill (-) for bending work rolls in water direction (-).

[Conventional technology]

In recent years, in order to control the shape of a rolled plate, at least one of the upper and lower backing rolls (2) supported work rolls is appropriately offset from the rolling line connecting the axes of the upper and lower backing rolls 1, and On the offset work roll, a roll with a shorter body (hereinafter referred to as a short body roll) than the work roll that has been hit multiple times in the length direction of the roll body, and the short body roll are individually pressed horizontally with respect to the work roll (the double-pressing property is adjusted by T). A pressing machine has been developed which is equipped with a horizontal pending device and a pressing device for making the rolling plate ′≦≦°C.

[Problem that the invention seeks to solve]

However, in such conventional rolling mills, in order to horizontally bend the work roll (direct pressing of the two short body rolls uses force (contact surface pressure), Marks were generated and transferred to the rolled plate, causing product temperature deterioration.

Therefore, a method was devised in which a presser roll is interposed between the short body roll and the work roll, but even in this case, the roll marks generated on the presser roll are transferred to the rolling plate via the work roll. I had the same problem as above.

The present invention aims to reduce the occurrence of roll marks by applying the bending force of the above-mentioned work rolls (two pairs) while reducing the force of pressing by the short body rolls.

[Means for Solving the Problems] The present invention provides horizontal force support by providing a double bending device at the shaft end of a horizontal bending roll such as a work roll or a presser roll, and placing a short body roll in the middle part. Take the configuration with the device installed.

[Effect J] Therefore, the horizontal bending of the horizontal bending roll is applied at the end of the roll shaft, and the intermediate part is better able to receive only the water force generated during rolling.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

In FIG. 1, (1) is a work roll, and two chocks (21 (31) are attached to both shaft ends of the work roll (1), and each chock (21 (31) is attached with a horizontal cylinder (41), respectively). (51 are connected in opposite directions to form a so-called double chock bearing device, and furthermore, a short body o-le (6) is installed at the intermediate part of the work o-ru (11) at a required interval (2 A support cylinder (7) is connected to each of the short rolls (6).

When bending the work roll (1) in the horizontal direction using such a configuration, operate each cylinder (4J (51W) at the end of the roll shaft to move the work roll (1) to the roll shaft. Double chock bending method from the end (see the two-dot chain line).

Furthermore, each cylinder (7) is operated separately to move the short body roll (6) to a position corresponding to the deflection curve of the work roll (IJ).
Contact the middle part of the roll.

Also, the operations may be performed in the reverse order of the above-mentioned operation method. That is,
After moving the position of the short body roll (6) according to the amount of deflection of the work roll (1) (= the bending curve to be applied), the second work roll (1) is brought into contact with the short body roll (6). Furthermore, in order to make the above operation method more effective, the load or force acting on the short body roll (6), work roll (1), etc. can be detected with a pressure gauge (9). (Secondly, the contact pressure between the short body roll (6) and the work roll (1) can be adjusted.

When horizontal bending is performed in this way, the short body roll (6
), the bending reaction force of the work roll (1) does not act, and only the horizontal force generated during rolling acts (2). Therefore, the contact of the short-turn roll (6) with the work roll (1) Since the surface pressure is reduced, the occurrence of roll marks is reduced.

On the other hand, if the above operation allows the occurrence of roll marks equivalent to the conventional one, the corresponding m IIP+
Since the pressing of the roll (6) can increase the force, the work roll (1) is given an even greater deflection,
The ability to control the shape of the rolled plate is the same as above.

Figure 2 shows another embodiment of the present invention '1'', in which a presser roll (8) is attached to and retracts from the work roll (1), and the presser roll (8) is similar to that shown in Figure @1. In this method (second), the work roll (1) is bent by the presser roll (8), and the work roll (1) is bent.
The horizontal force applied during rolling is supported by the short body roll (6) via the presser roll (8).

It should be noted that the present invention is not limited to the above-mentioned embodiment, and instead of the 7 cylinders, a moving device using a screw may be provided, and the moving device may be provided with a melon detector. Of course, various changes can be made without departing from the gist.

〔Effect of the invention〕

As explained above (2) According to the present invention, in a rolling mill equipped with work rolls that bend horizontally, the work rolls, presser rolls, etc. are bent by a double chock bending device on the roll shaft. It is possible to reduce the repelling surface pressure from the short body roll in contact with the intermediate portion, and to reduce the occurrence of roll marks, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of a roll venting device of the present invention, and FIG. 2 is a schematic plan view of another embodiment of the present invention. (1) is the work roll, (2) (3j is the chock, (4
) (5) is water\(flat linda, (6) is short body roll, (
7) indicates a support cylinder.

Claims (1)

[Scope of Claims] 1) A roll bending method characterized by supporting the bending curve of the work roll with a short body roll in a rolling mill that bends the work roll in a substantially horizontal direction. 2) A roll bending method in which the bending curve of the work roll is supported by a short body roll via a presser roll in a rolling mill that bends the work roll in a substantially horizontal direction. 3) In a rolling mill that bends work rolls in a substantially horizontal direction, a double chock bending device is provided at the shaft end of the work roll, and a horizontal force support device is provided in the middle of the work roll to bring the short body roll into contact. A roll bending device featuring: 4) In a rolling mill that bends a work roll in a substantially horizontal direction, a presser roll is attached to the work roll, a double chock bending device is provided at the shaft end of the presser roll, and a short body is installed in the middle of the presser roll. A roll bending device characterized by being provided with a horizontal force support device that brings the rolls into contact.