Method for controlling roll gap during finish rolling of strip steel

Abstract

The invention discloses a method for controlling a roll gap during finish rolling of strip steel. According to the method for controlling the roll gap during finish rolling of the strip steel, a set calculation model of the roll gap is , wherein the Gap in the formula is the set calculation value of the roll gap; a set calculation value of the outlet thickness of the strip steel is Fh; a width compensation and gain value is Gwid; an oil film compensation and gain value is Goil; an on-load roll gap value is S; a roll gap value when a roller is calibrated is S0; roll force is F; roll force when the roller is calibrated is F0; a roller gap self-learning coefficient is Lcs; a width compensation coefficient is WCX; initial rolling mill rigidity is M; rolling mill rigidity during calibration is M'; a roll gap value corresponding to a pressure value which is calculated when a rolling mill constant is calculated with the pressing method and is called initial roll gap value is Sj.

Description

technical field [0001] The invention belongs to the technical field of steel rolling automatic control, and in particular relates to a method for controlling the roll gap in the finish rolling process of strip steel. Background technique [0002] As an important quality index to measure plate and strip, thickness accuracy has become the focus of general attention in the metallurgical industry at home and abroad. One of the root causes of strip thickness fluctuations is due to fluctuations in the rolling mill roll gap. Therefore, the main reason for the thickness deviation of the strip is the problem of the roll gap, and the setting accuracy of the roll gap will directly affect the final rolling dimensional accuracy of the product. [0003] The main task of the roll gap setting model is to calculate the roll gap setting value, and finally achieve the control of the roll gap of the rolling mill. The roll gap control of the strip steel finishing rolling process is to use the r...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for controlling the roll gap in the finishing rolling process of strip steel, which solves the problem of zero point drift of the roll gap in the bouncing model and the problem of low accuracy of the roll gap self-learning model in the rolling process, so as to improve the precision of the roll gap in the finishing rolling process of the strip steel Set the accuracy, so as to achieve the purpose of improving the thickness accuracy of the finished hot-rolled strip steel

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