矩形端面电极电阻点焊温度场数值模拟  

Numerical simulation of the temperature field during resistance spot welding with rectangular electrode

作　　者：张小奇[1,2] 徐国成[1] 王春生[1,3] 文静[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130025 [2]吉林工程技术师范学院机电工程学院,长春130052 [3]长春轨道客车有限公司,长春130062

出　　处：《焊接学报》2009年第4期101-104,共4页Transactions of The China Welding Institution

摘　　要：基于ANSYS有限元分析软件,对电极端面为矩形的电阻点焊温度场进行数值模拟研究.在综合考虑模拟精度和具体工艺条件的基础上,对物理模型进行适当的简化处理,建立了矩形端面电极电阻点焊温度场1/4三维有限元分析模型,接触电阻采用电阻率的形式进行处理.结果表明,在焊接初期电极压力在电极端面边缘形成较大的应力分布,使得最高温度分布在电极边缘区域,随着焊接时间增加,接触电阻减小,最高温度向内部转移形成熔核,此时与传统点焊情况相似.The temperature field during resistance spot welding with rectangular electrode was simulated using ANSYS.The physical model was properly simplified on the basis of simulation accuracy and technological conditions.One-quarter three-dimensional finite element model during resistance spot welding was built in which the contact resistance was substituted by the electric resistivity.The results show that at the beginning of welding,the edge of electrodes has the highest temperature because of high stress induced by the electrode force.As welding time is longer,the contact resistance decreases and the highest temperature position moves to inside,the nugget appears to be similar with the conventional spot welding.

关 键 词：矩形端面电极 数值模拟 温度场 

分 类 号：TG402[金属学及工艺—焊接]