冷轧带钢板形分段接触式检测过程的力学建模与仿真  

MECHANICS MODELING AND SIMULATION OF PIECEWISE CONTACT FLATNESS STRESS MEASUREMENT PROCESS IN COLD ROLLING

作　　者：张清东[1] 文杰[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《工程力学》2013年第7期235-241,254,共8页Engineering Mechanics

基　　金：国家科技支撑计划项目(2011BAE13B05);国家自然科学基金项目(50675021;51075031)

摘　　要：建立了冷轧带钢板形应力分段接触式检测过程的ANSYS有限元模型,引入欧式距离方法表征检测误差,分析了在不同板形缺陷模式下,板形辊弯曲变形、板形辊分段区域宽度、板形辊直径、带钢包角、带钢厚度、卷取张力、带钢张力横向分布不对度等因素对板形检测精度的影响。仿真结果表明:随着板形辊弯曲变形程度的增大,板形应力检测精度大幅度降低。随着板形辊分段区域宽度的增大,板形检测精度大幅度降低;而随着板形辊分段区域宽度的减小,板形检测精度提高,但提高的幅度随着分段区域宽度的减小而越来越小。卷取工艺张力越低,板形检测精度越低;且当卷取张力增大到某一值时,再继续增大卷取张力对板形检测精度影响甚小。随着卷取张力横向分布不对称度的增大,板形检测精度降低。板形检测辊直径大小、带钢包角的变化以及带钢厚度的变化对板形检测精度没有影响。A finite element model of a piecewise contact flatness stress measurement process in cold rolling is established. Euclidean distance method is introduced to characterize the measurement error. The influences of relevant factors on measurement accuracy are analyzed in different flatness defect patterns, such as the bending of a flatness measuring roll, piecewise roll width, diameter of the roll, strip wrap angle, strip thickness, coiling tension, lateral distribution of coiling tension, and so on. Simulation results show that as the bending deformation of the strip flatness measuring roll increase, the flatness measurement accuracy is significantly reduced. A significant reduction of flatness measurement accuracy appear while the piecewise roll width increase; when the piecewise roll width decrease, the accuracy is improved more and more slowly. The greater the coiling tension, the higher the measurement accuracy. But when the coiling tension reaches a certain value, the accuracy no longer increase. As the asymmetry degree of coiling tension lateral distribution increase, the flatness measurement accuracy is reduced. The changes of the roll diameter, strip wrap angle, and the strip thickness do not affect the measurement accuracy.

关 键 词：板形缺陷 板形检测 板形辊 分段接触式 有限元法 

分 类 号：TH823[机械工程—仪器科学与技术]