冷轧过程组合式支承辊过盈配合面微动损伤危险位置预测  

Prediction of fretting damage location on the interference fit surface of back-up roll during strip cold rolling

作　　者：董永刚[1] 宋剑锋[1] 朱衡[1] 史卫 DONG Yong-gang;SONG Jian-feng;ZHU Heng;SHI Wei(College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;R＆D Department,CITIC Dicastal Co.,Ltd.,Qinhuangdao 066004,China)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]中信戴卡股份有限公司研发科,河北秦皇岛066004

出　　处：《塑性工程学报》2018年第4期278-284,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50775196);河北省自然科学基金钢铁联合研究基金资助项目(E2015203431);河北省博士后科研项目一等资助(2013B01)

摘　　要：为了准确预测冷轧过程组合式支承辊过盈配合面微动损伤危险位置,首先基于ABAQUS软件对辊套和辊芯装配过程以及板带冷轧过程进行数值模拟,得到了冷轧过程中组合式支承辊过盈配合面的应力分布,并提取过盈配合面对应节点位移数据基于MATLAB软件得到了微动滑移分布以及滑移轨迹,在此基础上得到了过盈装配面微动滑移速度分布,最后考虑过盈配合面平均周向应力、平均径向应力以及微动滑移速度对疲劳裂纹萌生和扩展的影响,得到了摩擦功沿轴向分布规律,并引入修正后的微动损伤评价参数Gc,基于修正后的Gc参数法预测了过盈装配面上微动损伤危险位置。In order to predict the fretting damage location on the interference fit surface between the roll sleeve and mandrel of composite back-up roll accurately,the assembling process of the roll sleeve and mandrel and strip cold rolling process were simulated by software ABAQUS,the stress distribution on the interference fit surface of back-up roll in the cold rolling process was obtained. Then the displacement distribution and track of fretting slip were determined by the simulation results of relative displacement data of the corresponding node on the interference fit surface of composite back-up roll based on the MATLAB,and the velocity distribution of fretting slip on the interference fit surface of composite back-up roll was obtained. Finally considering the effect of average circumferential stress,average radial stress,and fretting slip velocity on the fatigue crack initiation and propagation,the distribution rule of frictional work along radial direction was obtained and the modified evaluate parameter Gcof fretting damage was introduced,and the fretting damage location on the interference fit surface was predicted based on the modified parameter Gcmethod.

关 键 词：组合式支承辊 微动滑移 应力分布 摩擦功 微动损伤评价参数 

分 类 号：TG335.4[金属学及工艺—金属压力加工]