Control method of lateral thick difference of cold-rolling strip steels

Abstract

The invention discloses a control method of the lateral thick difference of cold-rolling strip steels, which realizes the feedforward control of the lateral thick difference of the cold-rolling strip steels by detecting the shapes of the profiles of hot-rolling supplied materials in real time on the basis of a profiler configured on an inlet of a No.1 rack. The control method mainly comprises thefollowing steps of: (1) configuring a strip steel profile shape detector on the inlet of the No.1 rack of a cold-rolling mill, and detecting the shapes of the profiles of the hot-rolling supplied materials in real time; (2) calculating to obtain the characteristic value vectors of the profiles of the cold-rolling strip steels positioned on the inlet of the No.1 rack through the measured values ofthe shapes of the profiles of the hot-rolling supplied materials; (3) respectively determining the compensation amount of a working bending roll, an intermediate bending roll, a supporting tilting roll, an upper shifting roll, a lower shifting roll and an intermediate shifting roll of the No.1 rack according to the difference of the actual values of the characteristic vectors of the profiles of the cold-rolling strip steels positioned on the inlet of the No.1 rack and the target values of the characteristic vectors; and (4) when the lateral thick difference is output in a controlling way, adopting the actual distribution of the flatness of a roll gap outlet as a constraint condition. The invention can further enhance the quality of the cold-rolling strip steels of cold-rolling mill products and ensure the stability of a cold-rolling production process.

Description

technical field [0001] The invention relates to a rolling method of strip steel, in particular to a method for controlling the thickness distribution of the cross-section of strip steel on a cold rolling mill. Background technique [0002] The geometric dimension accuracy of the plate and strip includes the plate thickness accuracy, that is, the longitudinal thickness difference, flatness and transverse thickness difference, and the plate width and other quality indicators. The "transverse thickness difference" in this paper is defined as the distribution of strip thickness along the width direction on the vertical plane perpendicular to the longitudinal direction. [0003] According to the different processing methods of the cold rolling mill for the transverse thickness difference of the hot-rolled incoming material, the existing cold-rolling mills can be divided into the following three situations. First, the unit does not detect the transverse thickness difference of th...

AI Technical Summary

Problems solved by technology

A cold rolling mill with this configuration usually does not involve the overall measurement and control of the strip cross-section

In addition, in the pre-setting control system of rolling parameters, the edge drop control and the flatness of the strip are not considered comprehensively, but the dynamic feedback adjustment of basic automation is used to eliminate mutual interference. lack of reasonable division of labor

This relatively independent system will theoretically cause frequent adjustments to the actuators of the feedback control of the end rack

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