Forecasting method of rolling pressure and roll gap pressure of DC rolling mill

Abstract

The invention discloses a forecasting method of rolling pressure and roll gap pressure of a DC rolling mill, which comprises the following steps of: (a) collecting equipment parameters and process parameters of a real DC rolling mill; (b) discretizing a roll system and a roll member; (c) assuming an initial roll gap shape; (d) setting the rolling pressure; (e) setting the roll gap pressure; (f) computing the roll gap shape h1 (y) and judging whether the roll gap shape is restrained or not, if not, going to the step d; and (g) checking the force balance condition (torque) of a working roll. The invention reasonably sets the rolling pressure and the roll gap pressure of the DC rolling mill by fully considering the influences of factors of rolling friction and the like according to the offset and alternately rolling the DC rolling mill, and forecasts the rolling pressure and the roll gap pressure of the DC rolling mill by coupling a metal model and a roll system deformation model. The forecasting method with higher precision is beneficial to not only improving the accuracy of the computation of the roll system deformation model, but also increasing the control accuracy of the thickness and the shape of the DC rolling mill, thereby improving the quality of products.

Description

technical field [0001] The invention relates to the field of plate thickness and shape control of a cold rolling mill, in particular to a method for forecasting rolling pressure and inter-roll pressure of a DC rolling mill. Background technique [0002] Shape and thickness are two major quality indicators in the production of strips. The accuracy of shape and thickness control mainly depends on the accuracy of the deformation model of the roll system. Therefore, it is very important to correctly analyze and set the force of the roll system, establish an accurate force model of the roll system, and ensure the prediction accuracy of the rolling pressure and the pressure between the rolls, which is very important for improving the control accuracy of the shape and thickness significance. For the DC rolling mill, since the work roll is offset and crossed relative to the back-up roll, the force on the roll system is obviously different from that of the ordinary four-roll mill. T...

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This affects the prediction accuracy of the rol

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