A Control Method for Preventing Strip Finish Rolling Drift

Abstract

The invention discloses a control method for preventing tail flicking in steel-strip precision rolling. The control method comprises the following steps: an i-2 rolling mill executes a steel throwing action, and a signal of the steel throwing action is sent to a control terminal; after receiving the signal that the i-2 rolling mill executes the steel throwing action, the control terminal sends a control command to an i# angle control assembly, so that the angle of an i# loop supporting arm is reduced from a normal rolling angle to a small angle; an i-1 rolling mill executes a steel throwing action, and a signal of the steel throwing action is sent to the control terminal; after receiving the signal that the i-1 rolling mill executes the steel throwing action, the control terminal sends a control command to the i# angle control assembly, so that the angle of the i# loop supporting arm is reduced from the small angle to the steel throwing angle, wherein the normal rolling angle is larger than the small angle which is larger than the steel throwing angle, and i is a natural number which is equal to or greater than 3. Through the adoption of the method, when the tail part of the steel strip falls in a loop, the applied force is reduced, so that the vibration of the tail part is reduced; therefore, the probability of tail flicking accidents during steel throwing in steel-strip precision rolling can be reduced or avoided.

Description

technical field [0001] The invention relates to the technical field of control equipment or methods specially suitable for metal rolling mills or processed products, in particular to a control method for preventing tailing in strip finishing rolling. Background technique [0002] Strip tailing in hot continuous rolling is an abnormal production phenomenon, which generally occurs in the production of thin gauge, hard material, wide-rolled pieces and silicon steel. When tailing phenomenon occurs in production, especially continuously, it will cause strip tail Folding and broken tails cause great harm to the manufacturer. The folded and broken tails are easy to damage the roll surface and cause roll marks on the product. In this way, the roll needs to be changed in the middle of rolling: if the broken pieces come into contact with the rolled piece, they will also be damaged. It often causes scratches on the surface of the rolled piece or rolling waste piles of steel; the broken...

AI Technical Summary

Problems solved by technology

[0006] The method to eliminate the defect of tailing scraping of the strip is an after-the-fact relief for the tailing that has already occurred, and it cannot fundamentally prevent the tailing of the strip during the rolling process.

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