JPH06262215A - Plate rolling mill - Google Patents

Abstract

PURPOSE:To control the distribution of rolled loads in the direction of plate width and to predict and control the plate crown and shape after rolling by arranging a load detecting device independently to a supporting part of each divided backup roll, further, providing a roll profile detecting device to each of all rolls other than the divided backup rolls. CONSTITUTION:An assembly of both upper and lower rolls is a mechanism supporting a work roll 1 by the divided backup rolls 2A, 2B, 2C, 3A, 3B, 3C, 3D divided into seven parts in the axial direction and a mill wherein independent load detecting devices 5, 6 are arranged on the supporting part of each divided backup roll is used. A roll profile detecting device 7 is arranged on each of all rolls other than the divided backup roll. The plate crown and shape in the time of rolling can be detected and controlled by the mill with high accuracy without time lag and automation of operation of a mill can be progressed drastically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling control of a plate rolling machine for reducing the thickness of a plate-shaped material or a band-shaped material by rolling to obtain a plate-shaped product or a band-shaped product having a predetermined thickness and a good shape. Regarding the method.

[0002]

2. Description of the Related Art In the conventional rolling technology, the strip crown / shape control of a rolled material is performed by separately arranging, for example, a strip thickness measuring instrument or a strip shape detector on the exit side of the rolling mill, Detects the plate thickness and plate shape of the rolled material, and based on the detection results, activates the work roll bender, intermediate roll bender, intermediate roll shift, roll cross mechanism, etc. to adjust the roll gap shape between the upper and lower work rolls. By doing.

However, according to this method of controlling the plate crown and shape of the rolling mill, when the rolled material has an abnormal plate crown and shape, the portion having the abnormal plate crown and shape is rolled, and the exit side of the rolling mill is rolled. The adjustment of the roll gap shape between the upper and lower work rolls is started after reaching the plate thickness measuring instrument and the plate shape measuring instrument arranged at.

For this reason, it takes a long time to complete the adjustment of the work roll gap shape, and there is a problem that the rolled material that has passed through the rolling mill during the time difference is not corrected in the plate crown shape. Moreover, in the conventional rolling mill,
The distribution of the rolling load in the strip width direction between the work rolls cannot be directly detected, and therefore the distribution of the rolling load in the strip width direction cannot be adjusted with high accuracy. There is a problem that it is difficult to control the high accuracy.

[0005]

The present invention is capable of detecting the distribution of the rolling load between the rolled material and the work rolls in the strip width direction, and controlling the distribution of the rolling load in the strip width direction. A rolling mill that can estimate and control the strip crown and shape after rolling with high accuracy, and can control the strip crown and shape without any time delay if abnormalities occur in the strip material. Is an issue.

[0006]

FIG. 1 is an explanatory view of an example of a plate rolling machine used in the present invention, (A) is a front explanatory view, and (B) is an example of arrangement of split reinforcing rolls of an upper roll assembly. FIG. The sheet rolling mill of the present invention will be described with reference to FIG.

In the present invention, at least one of the upper and lower roll assemblies (FIG. 1 is an example of both the upper and lower roll assemblies) is divided into three or more axial directions (FIG. 1 is an example of seven divisions). , Split reinforcement rolls 2A, 2B, 2
The work roll 1 is supported by C, 3A, 3B, 3C, and 3D, and an independent load detection device is provided at the support portion of each split reinforcement roll (for example, the load is provided at the support portion of the split reinforcement roll 2C). A rolling mill is used as the detection device 5C and a load detection device 6D is provided on the support portion of the split reinforcing roll 3D. In the rolling mill of the present invention, the roll profile detecting device 7 is provided for all rolls other than the split reinforcing rolls.

Reference numerals 8C and 9D in the drawing are examples of a split reinforcing roll pressing device independently arranged on each split reinforcing roll. The split reinforcing roll reduction device may be of a hydraulic type, a screw type, or an eccentric sleeve type of bearing.
Reference numeral 11 is an example of an inner housing in which a split reinforcing roll, a load detection device, and a split reinforcing roll pressure reducing device are arranged. The inner housing 11 is attached to a mill housing 12 and is vertically movable by a mill pressure reducing device 13.

FIG. 2 shows another example of the rolling mill according to the present invention, in which only the upper roll assembly is divided into three or more axial divisions, namely, reinforcing reinforcing rolls 2A, 2B, 2C, 3A, 3B, 3C, 3
The work roll 1 is supported by D, and an independent load detection device is provided at the support portion of each divided reinforcement roll (for example, the load detection device 5C is provided at the support portion of the divided reinforcement roll 2C and the divided reinforcement roll 3D is provided). The load detection device 6D is provided on the support portion), and the roll profile detection device 7 is provided on all rolls (upper work roll 1, lower work roll 15, undivided reinforcement roll 16) other than the divided reinforcement rolls. It is a rolling mill.

The rolling mill according to the present invention is a width direction plate thickness distribution / shape control device (not shown) using a rolling pattern control mechanism for split reinforcing rolls, a work roll bender or the like as an actuator.
Have. Loads detected by the respective load detection devices 5A, 5B, 5C, 6A, 6B, 6C and 6D are input to the width direction plate thickness distribution / shape control device. Further, each of the divided reinforcing roll reduction devices 8A, 8B, 8C, 9A, 9B, 9C, 9D can operate independently based on a command from the width direction plate thickness distribution / shape control device.

[0011]

[Action]

The operation of the present invention

[Table 1] ~

[Table 5] will be described.

[0013]

[Table 1]

[0014]

[Table 2]

[0015]

[Table 3]

[0016]

[Table 4]

[0017]

[Table 5]

[0018]

EFFECTS OF THE INVENTION By using the rolling control method for a sheet rolling mill of the present invention, it becomes possible to detect and control the sheet crown and shape during rolling with high accuracy without time delay, and the sheet crown and shape of the rolled sheet. The control accuracy is dramatically improved, and the automation of these rolling mill operation operations, which conventionally depended on skilled operators, can be greatly advanced. Further, in the rolling mill of the present invention, when abnormalities in the plate crown / shape of the rolled material occur, the split reinforcing rolls detect it as an anomaly in the distribution of the rolling load in the plate width direction. Shape control is also possible.

[Brief description of drawings]

FIG. 1 is an explanatory view of an example of a plate rolling machine of the present invention.

FIG. 2 is an explanatory view of another example of the plate rolling machine of the present invention.

FIG. 3 is a schematic diagram of a load acting on a work roll targeting an upper roll assembly.

[Explanation of symbols]

1: work roll, 2 (2A to 2C): split reinforcing roll,
3 (3A to 3D): split reinforcing rolls, 4: rolled material,
5 (5A to 5C): load detection device, 6 (6A to 6D): load detection device, 7: roll profile detection device, 8
(8A to 8C): Split reinforcing roll reduction device, 9 (9A to
9D): Split reinforcing roll reduction device, 11: Inner housing, 12: Mill housing, 13: Mill reduction device, 14: Bearing, 15: Lower work roll,
16: Reinforcing roll not divided, 17: Mill reduction device.

Claims (1)

[Claims] 1. At least one of the upper and lower roll assemblies has a mechanism for supporting a work roll by split reinforcing rolls which are divided into three or more parts in the axial direction, and the load detection is independently performed on the support portion of each split reinforcing roll. A plate rolling machine equipped with a device, and all rolls other than the split reinforcing rolls are equipped with a roll profile detecting device.