Roll gap learning coefficient correcting method in roll gap regulating process of hot continuous rolling strip steel precision rolling

Abstract

The invention relates to a roll gap learning coefficient correcting method in a roll gap regulating process of hot continuous rolling strip steel precision rolling. The method comprises the following steps: when a roll gap is regulated by adopting a roll gap setting calculating model, performing positive correcting on a roll gap learning coefficient when the situations of a super-thick strip steel head size, a slightly small learning regulating amount or reverse learning appear; performing negative correcting on the roll gap learning coefficient when the situations of a super-thin strip steel head size, a slightly small learning regulating amount or reverse learning appear, wherein the roll gap learning coefficient correcting formula is lcs-n=lcs-o+dh-act*a, in the formula, lcs-n is the roll gap regulating value which is obtained after the calculating of the model by utilizing current strip steel actual data, and is used for calculating the roll gap of a next piece of strip steel; and lcs-o is the roll gap regulating value which is used when the current strip steel setting calculating is performed; and the a is a regulating coefficient. According to the roll gap learning coefficient correcting method in the roll gap regulating process of the hot continuous rolling strip steel precision rolling, the roll gap learning coefficient is corrected in real time according to actual production when specific judgment conditions are satisfied on the basis of an existing roll gap setting calculating model, so that the purposes of regulating the roll gap quickly and precisely and improving the strip steel thickness rolling precision are achieved.

Description

technical field [0001] The invention relates to the technical field of hot continuous strip steel finish rolling, in particular to a method for correcting roll gap learning coefficients in the roll gap adjustment process of hot continuous strip steel finish rolling. Background technique [0002] In the production process of hot-rolled strip steel, the adjustment of the roll gap of the finishing mill is to use the roll gap setting calculation model to give the initial setting of the roll gap of each stand, and then adjust the roll gap through the first-level PLC actuator; in practical applications, There is a deviation in the initial setting value of the roll gap, which can only be corrected by the self-learning method. Therefore, the self-learning of the roll gap calculation model is an important means to improve the accuracy of the model setting. The learning process is to use real-time information to calculate the roll gap learning coefficient according to the change of th...

AI Technical Summary

Problems solved by technology

After analyzing the calculation model of roll gap setting, it is found that when the thickness deviation of the strip head is out of tolerance, the learning amount is too small or even reversed during the roll gap adjustment process, which affects the strip thickness accuracy

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