Comprehensive control method for improving rolling force of precisely rolled strip steel and thickness precision through tension compensation

Abstract

The invention provides a comprehensive control method for improving rolling force of precisely rolled strip steel and thickness precision through tension compensation. The method comprises the following steps of distinguishing three tension states comprising a micro-tension state, a large tension state and a normal tension state in a rolling process of the head of the precisely rolled strip steel; respectively calculating deformation resistance under the three tension states; setting the rolling force of the strip steel by using the rolling force in the large tension state; setting a roll gap of the head of the strip steel by using the rolling force in the micro-tension state; and performing adaptive learning by using the rolling force in the normal tension state. The problem that rolling force setting calculation, roll gap setting calculation and rolling force adaptive learning are conflicting is solved; and the setting precision of a hot rolled strip steel rolling force model and a roll gap model is improved, so that the setting precision of the precisely rolled rolling force and the controlling precision of the thickness of the head of the strip steel are simultaneously improved.

Description

technical field [0001] The present invention relates to the technical field of process control of metallurgical hot-rolled strip steel. Specifically, the present invention relates to a method for setting the rolling force of the finish-rolled strip steel. The thickness control of the head avoids the shortcomings of the previous strip steel setting method, and improves the precision of setting rolling force and thickness control of finishing rolling. Background technique [0002] The rolling force model is the most critical model for hot rolling and finishing rolling process control. The prediction accuracy of this model directly affects the rolling stability of the strip, the control accuracy of the thickness of the strip head, and the setting accuracy of the shape model. [0003] The current hot rolling model setting technology mainly improves the accuracy of strip thickness control by improving the prediction accuracy of the rolling force model and the roll gap model. Cha...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a comprehensive control method for improving the rolling force and thickness accuracy of the finished strip steel through tension compensation. The method calculates the rolling force by distinguishing three different tension states during the rolling process of the strip head , solve the problem that the actual tension does not match the set tension state in the process of rolling force calculation, and improve the accuracy of the rolling force setting and head thickness accuracy of the finished strip steel rolling

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