Calibration method for lower stepped pad of finishing mill and automatic roll changing control method
A technology of control method and calibration method, applied in the field of hot rolling, can solve the problems of low operation efficiency, poor accuracy of the lower step pad, etc.
Active Publication Date: 2020-10-20
SHOUGANG JINGTANG IRON & STEEL CO LTD
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Problems solved by technology
[0003] The invention provides a method for calibrating the lower step pad of a finishing mill and an automatic roll change control method, which solves the technical problems in the prior art that the movement position accuracy of the lower step pad is poor and the operation efficiency is low during automatic roll change
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[0037] The embodiments of the present application provide a calibration method for the lower step pad of a finishing mill and an automatic roll change control method, so as to solve the technical problems of poor movement position accuracy and low operation efficiency of the lower step pad during automatic roll change in the prior art.
[0038] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application. , rather than limiting the technical solutions of the present application, the embodiments of the present application and the technical features in the embodiments can be combined without conflict.
[0039] see figure 1 and figure 2 , a c...
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The invention belongs to the technical field of hot rolling and discloses a calibration method for a lower stepped pad of a finishing mill and an automatic roll changing control method. The calibration method for the lower stepped pad of the finishing mill comprises the following steps of acquiring the height of a lower bearing surface of a lower back-up roll when the lower bearing surface is positioned on a back-up roll pulley; determining an Nth pad, corresponding to the height, in the lower stepped pad; pushing the Nth pad to a roll changing position through the action of a stepped pad hydraulic cylinder, and obtaining the distance L1 between the center line of the Nth pad and the center line of a lower back-up roll arc-shaped pad; and calibrating the zero position of the stepped pad hydraulic cylinder through the roll changing position, and calibrating all pads of the lower stepped pad based on the distance L1. According to the calibration method of the lower stepped pad of the finishing mill, the shifting position precision and the operation efficiency of the lower stepped pad can be improved during automatic roll changing.
Description
technical field [0001] The invention relates to the technical field of hot rolling, in particular to a calibration method for a lower step pad of a finishing mill and an automatic roll changing control method. Background technique [0002] In the production process of hot-rolled strip steel, the height of the backing plate is often adjusted by the reciprocating movement of the lower step pad to compensate the wear amount of the diameter of the work roll and the back-up roll, and the different thickness of the step pad is used to compensate the change of the diameter of the work roll. The effect of rolling line height. However, in the process of automatic roll change, the position of the step pad is often lost or inaccurate, resulting in poor accuracy of the movement position of the step pad, which seriously affects the operation efficiency; at the same time, it is easy to cause the lower support roller to fall inaccurately. equipment accidents. Contents of the invention ...
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IPC IPC(8): B21B31/08B21B37/00
CPCB21B31/08B21B37/00
Inventor 张维中张泽朋韦绍恒王震冯树成孟庆龙张彦宾闻怡龙李强
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD