检测辊安装精度对冷轧带钢在线板形信号的影响

Effect of Detection Roll Installation Precision on Online Shape Signal of Cold Rolling Strip

基于几何关系和板形检测理论,建立了针对检测辊安装误差的在线板形信号误差补偿模型。结合轧机设备布局特点和工艺参数,针对固定包角和变包角两种安装方法,从水平误差和垂直误差2个方面,对在线板形信号进行综合误差的定量补偿。对于固定包角方式,检测辊安装精度的板形补偿量可设定为一常数;对于变包角方式,则需要根据变动态包角计算公式,在线实时计算动态补偿量。基于理论分析和工业实际数据,制定适合轧机自身特点的检测辊允许安装误差,才能最大限度地提高板形检测精度,使综合补偿后的板形曲线更真实地反映在线冷轧带钢的实际板形状况。以某1050冷轧机为例,其水平误差和垂直误差建议分别控制在0.03和0.05mm以内,才能满足基本的板形控制技术要求。

Based on the geometry and shape detection theory,the shape signal compensation model for installation error of the detection roll was established.Combined with two installation methods of the fixed wrap angle and the variable wrap angle,comprehensive compensation of the cold rolling strip shape signal was done based on the horizontal error and the vertical error.For the fixed wrap angle,the shape compensation amount could be set to a constant.For the variable wrap angle,dynamic compensation amount must be calculated based on the dynamically wrapping angle formula.Based on the theoretical analysis and practical industrial datum,suitable allow installation error could be developed by mill characteristics to maximize shape detection accuracy,and comprehensive compensation shape curve could more realistically reflect the actual shape status of online cold rolling strip.For example of a 1050 mill,the horizontal tilt amount was recommended less than 0.03 mm,the vertical tilt amount was controlled in less than 0.05 mm,the basic shape control technology requirements could be satisfied.