摩擦系数对四对轮CR-ECA大应变技术的影响  

Effect of friction coefficient on 4 pairs of CR-ECA large-straining deformation

作　　者：朱新董[1] 许晓静[1] 崇凯[1] 赵梓皓[1] 成城[1] 费震旦[1] 

机构地区：[1]江苏大学先进成形技术研究所,镇江212013

出　　处：《机械设计与制造》2011年第11期144-146,共3页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(5107479);江苏省自然基金重点项目(BK2007707)

摘　　要：集成传统轧制(conventional rolling)和等通道转角变形(equal channel angular deforma-tion)的新型大应变技术(CR-ECA大应变技术),是一种实现材料连续塑性大变形的有效手段。利用三维有限元分析软件Deform_3D对4对轮CR-ECA大应变技术进行了仿真计算。研究了4对轧制轮在不同摩擦系数下对工件应变、轧制轮扭矩及出口速度的影响。结果表明:摩擦系数是一个重要的技术参数;工件内部应变大小随着摩擦系数的变化而变化;随着摩擦系数的逐渐增大,轧制轮总扭矩逐渐增加,驱动性能提高;出口速度呈逐渐增大趋势,生产效率逐渐提高。A new severe plastic deformation（SPD）procedure called CR-ECA deformation procedure integrating conventional rolling with equal channel angular deformation is an effective method to make the material realize the continuous large strain deformation.The procedures with four pairs of rollers were simulated numerically by using finite element code DEFORM-3D.And the influences of four pairs of rollers on the work-piece effective strain,the torque of rollers and the output velocity under different friction coefficient were investigated,which results show that the friction coefficient between each pairs of rollers has significant influences on the CR-ECA deformation procedure.The magnitudes of effective strain are changed by the varied friction coefficient.With the increase of the friction coefficient,the total torque of rollers may increase gradually which may lead to a better driving performance for CR-ECA deformation procedure,the output velocity is increased gradually which makes the production more effective

关 键 词：摩擦系数 有限元仿真 大应变 出口速度 

分 类 号：TH16[机械工程—机械制造及自动化] TG332[金属学及工艺—金属压力加工]