Control method of automatic deviation correction during rolling of hot continuous rolling mill

Abstract

The invention relates to the field of deviation correction in hot continuous rolling, in particular to a control method of automatic deviation correction, which comprises the following steps of: 1, controlling the opening of a side guide plate in a strip steel entering state; 2, opening the side guide plate position detection to control roller gap deviation correction; 3, opening the side guide plate pressure detection to control roller gap deviation correction; and 4, controlling the opening of the side guide plate in a strip steel throwing state, closing the side guide plate pressure detection when the tail of the strip steel leaves from a first stand, and entering the control of the opening of the side guide plate until the strip steel completely leaves from a continuous rolling stand. The control method is perfected by using the traditional equipment condition, adopts a positive and effective means for the treatment of deviation, realizes automatic deviation correction on the strip steel, improves the rolling stability, is accurate in control and capable of ensuring the stability of hot rolling production, and has wider popularization value.

Description

technical field [0001] The invention relates to the field of deviation correction in hot rolling and continuous rolling, in particular to a control method for automatic deviation correction. Background technique [0002] In the process of continuous hot rolling, the continuous rolling process of strip steel is a complex process of technological change, the key of which involves the plastic deformation of hot rolled strip steel; due to the state of equipment of each stand and the characteristics of strip steel, there are certain particularities , its absolutely ideal rolling stock does not exist. Even for strips with the same variety and specification, as long as there is a difference in one aspect, it will affect the stability of the entire continuous rolling process. These differences include: temperature difference on both sides of the strip, thickness difference on both sides of the strip, Differences in side plate shape, etc., may cause instantaneous strip deviation dur...

AI Technical Summary

Problems solved by technology

[0006] 1. It is almost impossible to detect the deviation of the strip at the initial stage and delay the disposal time by relying entirely on the naked eye to judge the deviation of the strip;

[0007] 2. Due to the fast running speed of the strip during the rolling process, the response time completely dependent on manual control is insufficient, which will directly affect the rolling stability of the subsequent strip and the control of the edge quality of the strip;

[0008]3. Since the shape and temperature of the strip steel often change, once the operator performs leveling according to the previous strip steel, it will lead to wrong adjustments

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