铝合金复合焊旁路焊接参数对焊缝成形的影响  

Influence of Bypass Parameters in Hybrid Welding on Aluminum Alloy

作　　者：邱元棋 薛诚[1] 熊震宇[1] 单俊[1] 

机构地区：[1]南昌航空大学航空制造工程学院,南昌330036

出　　处：《南昌航空大学学报（自然科学版）》2014年第1期48-52,共5页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：南昌航空大学研究生创新基金(YC2012001);江西省教育厅科技项目(GJJ13502;GJJ12448)

摘　　要：由于铝合金线膨胀系数大,热导率高,焊接时热输入向母材一侧快速流动,在较大的热输入情况下容易使产生熔透不均匀、焊接变形、塌陷等问题。因此,本研究通过TIG-MIG复合焊试验,在改变焊接工艺参数的条件下,研究了旁路脉冲TIG中峰值电流、脉冲频率以及脉宽占空比分别对焊缝熔宽、余高和熔深的影响,并获得了参数阈值,为实现铝合金控制热输入的高效焊接提供了参考。Due to the large linear expansion coefficient and high thermal conductivity of aluminum alloy, the heat input would rapidly flow to the base material during welding, especially in the case of the large heat input, which causes the problem of uneven welding penetration, welding deformation, collapse and so on. Therefore, under the conditions of changing welding parameters, this study researched the relationship between bypass in the pulse TIG peak current, pulse frequency, pulse width ratio and weld width duty ratio, weld residual high, depth of molten by using MIG - TIG hybrid welding test. And the threshold value of parameters are obtained, which provide some reference to achieve efficient control of heat input in welding aluminum alloy.

关 键 词：MIG-TIG复合焊 旁路参数 高效焊接成型 

分 类 号：TG406[金属学及工艺—焊接]