单位宽度轧制力对热轧带钢凸度的影响规律

Effect of Unit Width Rolling Force on Hot Rolling Strip Profile

为了建立高精度的热轧带钢凸度计算数学模型 ,根据带钢凸度计算理论 ,采用影响函数法开发了四辊轧机带钢凸度影响率计算软件 ,系统地分析了单位宽度轧制力、轧辊直径和压下量对单位宽度轧制力影响率的影响规律·结果表明单位宽度轧制力影响率随带钢宽度的增加呈抛物线变化 ;轧辊直径和压下量对单位宽度轧制力影响率有一定的影响 ;建立了高精度单位宽度轧制力影响率的数学模型 ,确定了单位宽度轧制力影响率基本值及工作辊直径、支撑辊直径、压下量对单位宽度轧制力影响率修正系数的 6次拟合系数 。

In order to build the high accuracy mathematic model of hot roll strip profile,the influence ratio calculation software is developed with influence coefficients method,based on the theory of strip profile′s calculation. The ground value of special rolling force influencing ratio were calculated. The hexad polynomial fitting coefficients of special rolling force influencing ratio revised coefficients(revised by work roll diameter and back up roll diameter) were computed. The universal calculation model of special rolling force influencing ratio was built. The influence of special rolling force and roll diameters on hot roll diameters on hot roll strip profile were analyzed systematically. It is shown that along with the increasing of strip width,the changing curves of special rolling force influence ratio in 4 high mill change as parabola,the effect of work roll diameter and back up roll diameter on special rolling force influencing ratio play an important role. The simulation can be supplied for the strip profile control and the optimization of model coefficients.