离合器齿毂型轧中减薄率对回弹的影响  

Effect of thinning rate on springback in clutch hub profile rolling

作　　者：方璇璇 卢知渊 申昱 FANG Xuan-xuan;LU Zhi-yuan;SHEN Yu(Institute of Forming Technology and Equipment,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China;Research Institute of Technology of Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014000,China;Institute of Inner Mongolia,Shanghai Jiao Tong University,Shanghai 200030,China)

机构地区：[1]上海交通大学材料科学与工程学院塑性成形技术与装备研究院,上海200030 [2]内蒙古第一机械集团股份有限公司工艺研究所,内蒙古包头014000 [3]上海交通大学内蒙古研究院,上海200030

出　　处：《塑性工程学报》2022年第1期41-45,共5页Journal of Plasticity Engineering

基　　金：特种车辆及其传动系统智能制造国家重点实验室开放课题(GZ2019KF004);2020年“科技兴蒙”上海交通大学行动专项。

摘　　要：针对离合器齿毂型轧中回弹现象明显和几何精度低的问题,以薄壁筒形件作为坯料,开展了离合器齿毂型轧工艺研究。分析了齿毂型轧工艺相关的运动规律、材料流动特性和受力特点。为研究减薄率对成形件回弹量的影响,对型轧后的离合器齿毂内外齿形尺寸进行测量,获得了回弹量沿齿毂高度方向的分布规律及减薄率对成形件回弹量的影响规律。结果表明:回弹量随着成形件高度的增加而增加,随减薄率的增加而减小;回弹是由壁厚减薄后残余应力引起的弯曲变形;随着减薄率的增大,成形件弯矩和回弹量减小。Aiming at the problems of explicit springback and low geometric accuracy in clutch hub profile rolling,taking the thin-walled cylinder as blank,the profile rolling process of hub was studied.The motion rules,material flow characteristics and force characteristics of hub rolling process were analyzed.To study the influence of thinning rate on the springback amount of formed parts,the internal and external dimensions of profile rolled clutch hub were measured,and the distribution law of springback amount along the direction of hub height,as well as the influence law of thinning rate on the springback of the formed parts was obtained.The results show that the springback amount increases with the increase of the height of formed part and decreases with the increase of thinning rate;the springback is the result of bending deformation,which is caused by the residual stress after the wall thickness is thinned;with the increase of thinning rate,the bending moment and springback amount of the formed parts are decreased.

关 键 词：离合器型轧 回弹 减薄率 离合器齿毂 

分 类 号：TG335[金属学及工艺—金属压力加工]