JPS61262408A - Rolling device - Google Patents

Abstract

PURPOSE:To prevent the bending of small-diameter work rolls and to make possible the substantial provision of a rolling effect by using the upper work roll having a small diameter, providing press rolls before and behind said roll and controlling driving devices in such a manner that the horizontal force to be exerted to the work rolls attains a prescribed value. CONSTITUTION:The upper work roll 1 is made of the small-diameter roll in order to obtain a high draft and is disposed with the press rolls 7, 7 before and behind said roll to prevent the roll bending. An intermediate roll 5 and the lower work roll 2 are respectively driven by driving devices M1, M2. Horizontal force and direction are detected via a load cell 11 and a direction discriminator 12 when the horizontal force is exerted to the roll 1 with the above- mentioned constitution. The signal is compared with the set value of a pressing force setter 14 by a calculator 13. The torque distribution of the driving devices M1, M2 is controlled with controllers 18, 19 if there is a difference therebetween. The bending of the small-diameter work roll 1 is thereby prevented and the rolling effect as the small-diameter roll is substantially provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rolling apparatus that can fully exhibit the effect of small-diameter work rolls.

[Conventional technology]

Generally, it is known that when a plate material is rolled using a small diameter work roll, an extremely high rolling reduction ratio can be obtained. As an example of a rolling mill using such a small-diameter work roll, as shown in FIG. A five-high rolling mill was developed in which an intermediate roll 5 was disposed between the small-diameter work roll 1 and the upper backing roll 3.

In addition, 4 is a lower backing roll, and 6 is a plate material. In the case of such a rolling mill, since the permissible transmission torque of the drive device for the upper work roll 1 is small due to the strength, the intermediate roll 5 and the lower work roll 2 are moved by the drive device M1. It is driven by M2.

[Problems to be Solved by the Invention] However, in such a rolling mill, the horizontal force due to the frictional force exerted by the intermediate roll drive torque on the upper work roll, the front and rear tension difference of the plate material 6, etc. act on the upper work roll 1. Therefore, the upper work roll 1 is easily bent in the horizontal direction, which not only makes it impossible to fully exhibit the effect of the small diameter work roll, but also makes it difficult to achieve sheet thickness accuracy in the width direction due to the horizontal bending of the small diameter work roll.

The present invention prevents horizontal bending of small-diameter work rolls so that the effects of small-diameter work rolls can be fully exhibited.

[Means for Solving the Problems] The present invention includes forming one of the upper and lower work rolls to have a small diameter, and providing an intermediate roll between the small-diameter work roll and a backing roll on the side of the small-diameter work roll; and the other working opening are driven by drive devices, respectively, in which a presser foot for increasing the lateral rigidity of the small-diameter work roll and the presser roll are provided at front and rear positions of the small-diameter work roll. A horizontal pushing device is arranged to press the small-diameter work roll, and a detector is provided to detect the horizontal force applied to the small-diameter work roll, and each drive device is controlled so that the signal from the detector becomes a predetermined value. The configuration includes a control device that sends commands.

[Function] Therefore, the lateral rigidity of the small-diameter work roll is improved, and when a horizontal force is applied to the small-diameter work roll, it is detected by the detector, and the torque distribution of the vertical drive Ronil is controlled based on the value, and the intermediate roll and The torque of the other work roll is controlled.

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

FIG. 1 shows a rolling apparatus of the present invention, and the same reference numerals as in FIG. 3 indicate the same parts.

At the front and back positions of the upper work roll 1 in the rolling line direction, presser O-lures 7 are disposed for increasing the lateral rigidity of the upper work roll 1 (reducing the amount of bending of the roll in the horizontal direction). As shown in Figure 2, the axle box 8 of the presser roll 7.
, 8 are incorporated in the axle box 9 of the upper work roll 1 so as to be movable in the rolling line direction, and the axle box 8.8 is a cylinder 10.1 attached to the upper work roll axle box 9 as a lateral pushing device.
017) Connect the rod ends via load cells 11.11. Therefore, the horizontal force acting on the upper work roll 1, O-
It is detected by the load on the docel 1'1.11.

Further, 12 is a load cell 11. a direction discriminator for determining whether the signal from ii is the upstream side in the rolling line direction or the downstream side; 13;
is the load cell 11 sent via the direction discriminator 12
．． Calculator 15 and 16 respectively compare and calculate the signal from 11 and the setting value from force setter 14 for pressing.
Arithmetic units 18.19 compare and calculate the signals from the speed setter 11 with the signals from the speed setter 11. This is a controller that sends drive commands to M2.

In such a configuration, the upper work roll 1 is held in its front and back positions by the presser roll 7.7, so that even if a horizontal force is applied, horizontal bending is prevented. The horizontal force at this time is detected by the load cell 11.11, and furthermore, the direction discriminator 12 discriminates whether it is acting in either direction of the rolling line. Then, the signal from the direction discriminator 12 and the signal from the pressing force setting device 14 are compared in the force generator 13, and if there is a difference, the signals are calculated. ! 1
Sent to 5.16. Arithmetic units 15 and 16 operate on the signal from speed setter 17 and send it to controllers 18 and 19. Based on this signal, the controllers 18 and 19 output drive commands to the drive device M1 that drives the intermediate roll 5 and the drive device M2 that drives the lower work roll 2, respectively.
, 2 are distributed so that the horizontal force detected by the load cells 11, 11 is equal to or within the range of the value of the setting device 14, and torque balance control is performed.

In the above embodiment, the load cell It, 11 was used to detect the horizontal force acting on the upper work roll 1, but the differential pressure of the pressure liquid supplied to the cylinders 10 and 10 may also be taken out. It goes without saying that the lower work roll 2 may be formed to have a smaller diameter instead of the upper work roll 1, and that various changes can be made without departing from the gist of the invention.

[Effects of the Invention] As explained above, the rolling apparatus of the present invention has the excellent effect of preventing the small-diameter work roll from bending in the horizontal direction and fully exhibiting the small-diameter work roll effect. obtain.

[Brief explanation of drawings]

FIG. 1 is an overall explanatory diagram of the rolling apparatus of the present invention, FIG. 2 is a partial explanatory diagram, and FIG. 3 is an explanatory diagram of a conventional example. 1 is an upper work roll, 2 is a lower work roll, 3 is an upper support roll, 4 is a lower support roll, 4 is a lower support roll, 5 is an intermediate roll, 6 is a plate material, 7 is a presser roll, 10 is a cylinder, 1
1 is an O-drive cell, 13° 15.16 is a computing unit, 14 is a force setting device for pressing, 17 is a speed setting device, 18.19 is a controller, M+ and M2 are drive devices.

Claims (1)

[Claims] 1) One of the upper and lower work rolls is formed to have a small diameter, and an intermediate roll is provided between the small-diameter work roll and a backing roll on the small-diameter work roll side, and the intermediate roll and the other work roll are each driven by a drive device. In the rolling mill, a presser roll for increasing the lateral rigidity of the small-diameter work roll and a lateral pushing device for pressing the presser roll against the small-diameter work roll are arranged in front and rear positions of the small-diameter work roll,
The rolling method further comprises a detector for detecting the horizontal force applied to the small-diameter work roll, and a control device for sending control commands to each of the drive devices so that the signal from the detector becomes a predetermined value. Device.