Correction method for tail of strip of continuous rolling unit

Abstract

The invention discloses a correction method for the tail of a strip of a continuous rolling unit, and relates to the technical field of metal pressure machining. The method comprises the following steps that a start signal of a strip tail correction program is set, and the strip tail correction program is started when a metal detector arranged at an inlet of the continuous rolling unit detects the tail of an intermediate billet rolled piece; the difference value of roll gaps on the double sides of a second rack of the continuous rolling unit is calculated and corrected; the difference value of roll gaps on the double sides of each of the rest of racks of the continuous rolling unit is calculated and corrected; and self-learning is carried out on the correction factor of the correction value of the difference value of the roll gaps on the double sides of each rack. The correction method solves the problems that in tail lateral bending correction in the existing intermediate billet rolling process, lagging and instability exist, and consequently the correction effect is poor.

Description

technical field [0001] The invention relates to the technical field of metal pressure processing, in particular to a strip tail deflection correcting method for a continuous rolling mill. Background technique [0002] In the production process of hot-rolled coils, the slab ingot is first rolled into an intermediate billet of a certain thickness on a billet rolling mill, and then sent to the continuous rolling unit for one-time rolling into coils. In the process of rolling the intermediate billet, affected by various factors, the intermediate billet will have different degrees of side bending, which is commonly known as camber. When performing continuous rolling, if the side bending of the intermediate billet is not controlled, it will lead to cross-layer defects at the head and tail of the coil. In the current production site, the operator usually corrects the deviation by adjusting the difference between the roll gaps on both sides of the frame after observing the side ben...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for rectifying the tail of a strip in a continuous rolling mill, which can solve the problem of lagging and instability in the correction of the side bend of the tail in the existing intermediate billet rolling process, resulting in poor rectification effect

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