Method for setting plate shape and plate convexity off-line prediction of PC rolling mill

Abstract

The invention relates to a method for setting plate shape and plate convexity off-line prediction of a PC rolling mill, aiming at the rolling distinctiveness of the PC rolling mill and comprising thefollowing step: (a) collecting an actual equipment parameter and a technological parameter of the PC rolling mill; (b) discretizing a roll system and a roll piece; (c) setting an initial technologicalparameter; (d) computing transverse distribution values of the rolling pressure and front tensile stress of a unit length; (e) computing pressure among rollers and the distribution value of outlet thickness; (f) performing the convergence theorem by the maximum value of the transverse distribution variable quantity of the outlet thickness, if the not convergent, turning to the (d) step; and (g) judging plate shape condition to optimize a crossing angle and a roller bending force according to the distribution condition of plate convexity and the front tensile stress. The invention has high prediction precision of the rolling pressure and the plate convexity, computed crossing angle and roller bending force optimization and good rolling plate shape, not only enhances the plate shape controlcapability of the PC rolling mill but also achieves the industrial application precision requirement.

Description

technical field [0001] The invention relates to a rolling production process technology of a PC rolling mill, in particular to an off-line forecast setting method for the PC rolling mill plate shape convexity. Background technique [0002] In industrial production, flatness is a major indicator of strip steel. With the wide application of AGC technology in strip mills, the longitudinal thickness accuracy of strip steel has reached a high level, while the quality of strip steel strip shape quality has become increasingly prominent. Since the PC rolling mill has a very significant effect on improving the shape of the strip and controlling the crown of the rolled piece, it is widely used in the hot and cold rolling of strip steel. The PC rolling mill has two control means for shape control: intersection angle and roll bending force. In production practice, the plate shape of the PC mill is poor due to factors such as too small setting of the crossing angle, improper setting o...

AI Technical Summary

Problems solved by technology

In the past, the metal deformation model and roll system deformation model established for ordinary four-high rolling mills did not consider the rolling characteristics of PC rolling mills, so it is not suitable to be directly applied to PC rolling mills, there are certain errors, and the shape control results are not ideal

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