Cold rolled steel strip straightness feedforward control method based on transverse performance detection

Abstract

The invention relates to the field of strip cold rolling technology, in particular to a strip straightness control method of a cold tandem rolling unit. A cold rolled steel strip straightness feedforward control method based on transverse performance detection comprises the following steps: providing a detection instrument configuration method; tracking incoming material by sections; storing the yield strength value of each detection point in the width direction of each section of steel strip in a data table, wherein the yield strength values are detected by a transverse performance detector;calculating the deformation resistance values of the corresponding transverse detection points of the section of steel strip on the first rack and each subsequent rack; and finally determining the regulation quantities of strip shape control execution mechanisms of the first rack and each subsequent rack respectively according to a feedforward control algorithm so as to perform real-time control.The method provided by the invention performs feedforward control on the straightness of steel strip in the cold rolling process through online real-time detection of the transverse performance of the hot rolled incoming steel strip, and has positive significance for ensuring straightness consistence of the cold rolled steel strip in the length direction of a whole steel coil, improving the yieldof the cold rolled steel strip and guaranteeing stability and reliability of the cold rolling process.

Description

technical field [0001] The invention relates to the technical field of strip cold rolling, in particular to a method for controlling the flatness of a strip in a continuous cold rolling mill. Background technique [0002] The rapid development of modern industry puts forward higher requirements for strip steel production. Plate thickness and plate shape are two important indicators to measure the quality of strip steel. At present, the thickness deviation in the rolling direction of strip steel has been effectively controlled, but the problem of strip steel plate shape has not been well solved. Manufacturers and users pay attention to it, and its quality directly affects the yield and market competitiveness of cold-rolled strip products. Flatness refers to the difference in the longitudinal elongation of the strip in the width direction, and is one of the important indicators for assessing the quality of the strip shape. Based on the feed-forward control method of flatness...

AI Technical Summary

Problems solved by technology

The difference in the transverse properties of the incoming material has a recurring effect on the flatness of the cold-rolled strip. When the strip with a transverse property difference enters each stand, a new longitudinal elongation difference will be generated, which will eventually lead to poor cold-rolled strip. straightness

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