不同拘束条件下坡口间隙对焊接变形的影响  

Influence of groove gap on welding deformation under different constrain conditions

作　　者：马国[1] 蹤雪梅 田艳峰 占小红[3] 

机构地区：[1]江苏徐州工程机械研究院,221004 [2]徐工集团工程机械有限公司,高端工程机械智能制造国家重点实验室,221004 [3]南京航空航天大学材料科学与技术学院,211106

出　　处：《焊接学报》2017年第9期19-22,共4页Transactions of The China Welding Institution

摘　　要：坡口间隙的存在及其在不同拘束条件下会对焊接变形产生不同影响.以平板对接多层多道焊为研究对象,将坡口间隙作为考虑因素添加到焊接数值模拟模型中,采用试验测量与焊接仿真相结合的方法,在不同拘束条件下研究坡口间隙对焊接变形的影响效果,为进一步利用数值方法解决焊接变形问题提供了参考依据.结果表明,相同拘束条件下,有无坡口间隙对焊接变形趋势影响并不明显,但对残余变形数值大小影响显著,且在弹簧拘束条件下焊接变形结果差别最大;被焊平板存在坡口间隙时,弹簧拘束条件下的模拟结果与自由状态下焊接试验获得的焊接变形结果最为一致.Groove gap and constrain condition affect the welding deformation. Combining experimental measurement and numerical simulation,the effect of groove gap under different constrain conditions on welding deformation is investigated by considering the groove gap in the numerical model for multi-layer and multi-pass butt welding of flat sheet. The results show that groove gap has little effect on the trend of welding deformation,but has significant impact on the values of residual deformation,and the largest difference appears under the spring constrain condition. When groove gap exists during butt welding of flat sheet,the simulated result of welding deformation under spring constrain condition is consistent with those measured by welding experiments in a free state.

关 键 词：坡口间隙 多层多道焊接 拘束条件 焊接变形 

分 类 号：TG404[金属学及工艺—焊接]