基于有限元分析的冷连轧辊缝设定模型研究

STUDY ON THE ROLL GAP SETUP MODEL OF COLD TANDEM ROLLING BASED ON FEM

针对冷连轧有限元分析中辊缝设定需要多次调试的问题,在河钢唐钢1740 mm冷连轧有限元模型研究基础上,开发了一种可以快速确定各机架辊缝设定值的冷连轧辊缝设定模型。利用各机架轧机弹性变形数据拟合出轧制力对出口厚度与辊缝之差的轧机弹性变形公式,同时利用各机架轧件塑性变形数据拟合出轧制力对轧件真应变的轧件塑性变形公式。轧机弹性变形公式和轧件塑性变形公式联立求解出辊缝设定公式,即可通过已知入口厚度和出口厚度确定辊缝设定值。利用该公式对S5机架新增的计算工况条件进行了辊缝预测,并与实际所需辊缝进行对比,偏差控制在5.92%以内,辊缝设定模型可靠。

Aiming at the problem that the roll gap setting needs to be adjusted for many times in the finite element analysis of cold tandem rolling,based o the research work of the finite element model of 1740 mm cold tandem rolling mill of HBIS Tangsteel,this paper introduces a model for the roll gap setup of cold tandem rolling which can quickly determine the set value of the roll gap of each stand.Firstly,the mill elastic deformation equation of rolling force on the difference between exit thickness and roll gap is fitted by using the elastic deformation data of each stand,and the plastic deformation equation of rolling force on the true strain of steel strip is fitted by using the plastic deformation data of each stand.Then,the formula of roll gap setting can be solved by using the elastic deformation equation of the mill and the plastic deformation equation of the steel strip,and the set value of the roll gap can be determined according to the thickness of entrance and exit.Using this formula,roll gap prediction is made for the new calculation conditions of S5 stand.Comparing with the actual required roll gap,it can be known that the deviation is within 5.92%.The roll gap setting model is reliable.