Feedback control method for edge thinning of single taper work roll shifting mill

Abstract

The invention provides a feedback control method for edge drop of a taper work roll shifting mill (T-WRS). A feedback control model is established specific to edge drop of cold-rolled silicon steel with a five stand cold rolling T-WRS as an object and the minimum lateral thick difference of the cold-rolled silicon steel as an objective function, that is to say, according to the feedback coordination control model for edge drop, specific to different modalities of an edge drop deviation signal actually measured by an edge drop instrument at an outlet of S5 namely a fifth stand, precise control over edge drop is achieved through processing of the edge drop deviation signal, fitting of the edge drop deviation signal, calculation of regulation values of work roll shifting rolls of all stands and limiting processing of the regulation values of the shifting rolls of all the stands in coordination with the S1-S3 stands. According to the feedback control method, defects of edge drop of band steel can be reduced, and the lamination rate of finished products of the cold-rolled silicon steel is increased, so that the rate of the edge drop average value smaller than or equal to 10 [mu]m of the silicon steel products reaches 100%, and the rate of the edge drop average value smaller than or equal to 8 [mu]m reaches 98.5%. A good control effect is achieved.

Description

technical field [0001] The invention belongs to the field of cold rolling process control, and in particular relates to a feedback control method for edge thinning of a single-taper work roll shifting mill used for cold rolling silicon steel rolling. Background technique [0002] Cold-rolled silicon steel, as a high-efficiency, energy-saving, and large-volume excellent soft magnetic functional material that is prioritized by the country, is the top priority in the adjustment of the variety structure of my country's iron and steel industry. It is widely used in fields such as electric power, electromechanical, post and telecommunications, and military industry. The lateral thickness difference is an important quality index of silicon steel products, which determines the lamination coefficient of silicon steel. Therefore, in order to improve the efficiency of motors and transformers, the requirements for the lateral thickness difference of silicon steel are extremely high. The ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a side thinning feedback control method suitable for single-taper work roll shifting cold rolling mills, aiming to solve the problem of low control accuracy of strip transverse thickness uniformity in the production process of cold-rolled silicon steel, and improve the quality of silicon steel products. Lamination rate and magnetic permeability, to achieve the purpose of improving the quality and market competitiveness of silicon steel products

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