Method for forecasting strip shape and leaning during abnormal rolling of ultrathin strip of six-roller mill

Abstract

A method for forecasting the strip shape and leaning during abnormal rolling of an ultrathin strip of a six-roller mill comprises the following computer-executed steps of 1, collecting main equipment and process parameters during the abnormal rolling of the six-roller mill to be forecast; 2, collecting the main rolling process parameters of a strip during the abnormal rolling; 3, determining process variables related in the forecasting process; 4, dividing units and solving an influence function; 5, forecasting the outlet strip shape and the leaning width during the abnormal rolling of the ultrathin strip; 6, outputting the outlet strip shape and the leaning width during the abnormal rolling of the ulrtatin strip, and finishing the strip shape and leaning forecasting during the abnormal rolling of the ultrathin strip of the six-roller mill. The method for forecasting the strip shape and leaning during abnormal rolling of the ultrathin strip of the six-roller mill can quantitatively forecast the outlet strip shape and the leaning condition at the roller end of work rollers when abnormal factors exist, thus providing basis for the processing on the strip shape and the leaning under the rolling condition of the ultrathin strip steel of the six-roller mill.

Description

technical field [0001] The invention relates to the field of metallurgical cold rolling, in particular to a method for predicting the shape and pressure of an ultra-thin strip in a six-high rolling mill during abnormal rolling. Background technique [0002] With the intensification of market competition, users have increasingly strong demand for strip thickness reduction, requiring manufacturers to provide thinner products. However, according to actual field experience, for a six-high rolling mill, as the thickness of the strip decreases, the work roll end pressing phenomenon becomes more obvious, resulting in an abnormal increase in rolling pressure, and the accuracy of the shape and thickness cannot be reached. Requirements, affecting the quality of the finished strip. In addition, due to the asymmetry of the left and right bending forces between the work roll and the middle roll in the rolling process, there is a certain amount of deviation in the strip, the center line ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an abnormal rolling method for ultra-thin strips in a six-high mill to solve the problem of inaccurate or even impossible forecasting of the exit shape and the width of the crimp during the abnormal rolling process of the ultra-thin strip in the on-site six-high mill. This method can realize the following three functions: (1) Quantitatively predict the occurrence of strip deviation, asymmetric roll shape, misalignment of rolling center line and roll center line, Exit shape and roll end pressure of work rolls under the action of abnormal factors such as asymmetric roll bending and asymmetric roll shifting; (2) Quantitative prediction of normal factors such as symmetrical roll bending, symmetrical roll shifting, and tilting of six-high rolling mills The value of the exit shape and the pressure of the work roll end during the action; (3) Quantitatively predict the exit shape of the six-high mill and the pressure of the work roll end under the combined action of normal and abnormal factors

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