点焊电极球面半径对熔核尺寸的影响  

Effect of spherical radius of spot welding electrode on nugget size

作　　者：李茹娟[1] 李萌盛[1] 王洋[1] 严红丹[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《焊接学报》2008年第6期105-108,118,共5页Transactions of The China Welding Institution

摘　　要：在影响点焊质量的诸多因素中,电极半径的作用不容忽视。利用ANSYS软件,建立1/2轴对称模型,在解决接触问题的基础上,对点焊过程进行数值模拟,定量研究了球形电极端面半径变化对低碳钢点焊熔核尺寸的影响,分别计算出采用不同电极球面半径点焊时的熔核尺寸,并通过实际施焊验证了模拟的准确性。结果表明,电极球面半径变化对熔核直径、工件焊透率有显著影响,而对热影响区外围空间尺寸影响不大,计算结果与试验结果误差在10%以内。Spherical radius is a very important factor which can affect the quality of spot welding.After solving the contact problem,an axial symmetry model to simulate the welding process was established.Effects of spherical radius of electrode on low-carbon steel resistance spot welding nugget size were investigated quantitatively through ANSYS software.Nugget sizes were simulated by adopting different eletrode radius,and accuracy of simulation was verified by welding experiment.Results indicate that electrode sphe...

关 键 词：点焊 温度场 数值模拟 

分 类 号：TG44[金属学及工艺—焊接]