Study Of Shape Control Efficiency Function On Cold Rolling Mill

Plate and strip products are the backbone of the steel industry. The shape control isthe key technology for strip mill. The modern high technology of cold-rolled strip usuallyhave a variety of strip shape adjustment method. In the practical application, we needcomprehensive use of various shape regulatory measures to eliminate the shape deviation.Efficiency function is used to describe the control property of the flatness controlactuator on cold mill. Considering that efficiency function is great importance to flatnesscontrol, the theoretical studies on efficiency function are developed in this paper to graspits basic pattern and varying regularity. In this dissertation, UC Mill is selected as theobject of the research work.Based on the efficiency function mode and carried on the comprehensive in-depthanalysis and research. By comparing the control algorithm of efficiency function modelwith the algorithm of conventional model, the superiority of efficiency function model isproved.A special mathematical model is built up to calculate the efficiency functions of workroll bending and skewing under the condition that wide thin strip is rolled. Based onFORTRAN language, prepare of calculation programs to achieve function calculation forbending roll and roll shifting under the conditions of different parameters.Use of efficacy function numerical model for work roll bending, middle roll bendingand intermediate roller move transversely this several of the most common shape controlof the means of efficacy function to perform comprehensive research. The roll systemdeformation and rolling piece deformation is thoroughly analyzed. Explore the adjustmentprinciple of roll’s bending and roll’s shifting, and on this basis, analyze the efficiencyfunction of relationship between the affecting factors and the bending roll and roll shifting,understand function between the main influence factors and secondary influence factorsand the impact of factors for efficacy .In this paper, we research, summarize the control effect of flatness controlmechanism, compare its regulation characteristics. The results not only helps to shape control technology, but also plays an important role in perfecting the shape control theory.