铝钢电阻单元焊冲裁过程建模  

Modeling of Punching Processes of Resistance Element Welding of Aluminums and Steels

作　　者：何冠中 楼铭[1,2] 马运五 李永兵[1,2] HE Guanzhong;LOU Ming;MA Yunwu;LI Yongbing(State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai,200240;Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures,Shanghai Jiao Tong University,Shanghai,200240)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室 [2]上海交通大学上海市复杂薄板结构数字化制造重点实验室

出　　处：《中国机械工程》2018年第7期864-869,881,共7页China Mechanical Engineering

基　　金：国家自然科学基金-中国汽车产业创新发展联合基金资助重点项目(U1764251)

摘　　要：针对铝钢异种材料电阻单元焊工艺的铆钉冲裁过程,建立了冲裁过程二维轴对称有限元仿真模型,对冲裁过程中接头的几何形貌演化以及应力分布特征进行了分析,并利用该模型研究了铆钉头部形貌、铆钉腿部形貌、落料模凸台宽度、落料模凸台高度和铆钉与落料模间隙等五个几何特征对冲裁过程及冲裁接头质量的影响规律,提出了铆钉和模具几何形貌的优化建议。Addressing to the punching phase of resistance element welding(REW)processes,a two-dimensional axisymmetric finite-element model was developed,through which the geometrical evolutions and stress distributions of joints were studied.Moreover,the influence rules of five geometrical parameters on punching processes and joint qualities were analyzed,which consisted of rivet head shapes,rivet shank shapes,boss heights,boss widths and the gaps between rivets and dies.Some optimization suggestions of geometric shapes of the rivets and dies were also proposed.

关 键 词：电阻单元焊 异种材料连接 冲裁过程 有限元模型 

分 类 号：TG386.2[金属学及工艺—金属压力加工]