Wide and thick plate shape buckling and plate convexity control method

Abstract

The invention discloses a wide and thick plate shape buckling and plate convexity control method. The method comprises CVC roll shape curve optimization and rolling process dynamic parameter adjustment. CVC roll shape curve optimization utilizes a rolling force model and an inter-roll elastic deformation model between a roll system and a rolled piece to solve a CVC working roll shape curve and a CVC supporting roll shape curve, and rolling process dynamic parameter adjustment utilizes plate shape buckling control of a variable roll gap adjustment model and plate convexity control of a variable stiffness adjustment model. When a rolling mill is used for rough rolling or finish rolling, a technological method combining plate shape buckling control rolling, plate shape buckling and plate convexity comprehensive control rolling and plate convexity control rolling is adopted, the problem that the difference between plate shape buckling and the plate convexity of the wide and thick plate along the transverse section is too large is effectively solved, and the straightness and the plate convexity of the wide and thick plate are reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgical production, in particular to a method for controlling the curvature and convexity of wide and thick plates. Background technique [0002] Plate shape, like thickness and width, is an important index to measure the geometric accuracy of plate and strip. Strips with poor shape not only make the follow-up process difficult to operate, resulting in waste products, but because the thickness of wide and thick plates is generally more than 50mm, and the maximum width can exceed 5m, the internal residual stress is difficult to eliminate, so the shape of wide and thick plates has always been a problem. A hot topic of research at home and abroad, the large flatness caused by the curvature of the plate and the large difference in the plate convexity on the transverse section are an important issue for the high rejection rate of wide and thick plates, so effectively adjust the plate curvature and plate ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for controlling the flatness and convexity of wide and thick plates, which solves the problem of controlling the shape of wide and thick plates by optimizing the roll shape curve and adjusting the dynamic parameters of the rolling process after the rolls are worn out.

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