高速列车侧墙激光-电弧复合焊工程适应性试验研究  

Engineering adaptability of laser-MIG hybrid welding of side wall of high speed train

作　　者：汪认[1] 李小宇[2] 俞树国 

机构地区：[1]南车青岛四方机车车辆股份有限公司,266111 [2]机械科学研究院哈尔滨焊接研究所,150028

出　　处：《焊接》2015年第4期45-48,75,共4页Welding & Joining

摘　　要：试验针对高速列车3 mm和4 mm侧墙结构,采用激光-电弧复合焊接工艺方法,对焊接生产中装配常出现的错边、间隙对焊接质量影响规律开展试验研究.试验针对0～2.0 mm的间隙量和0～0.5 mm的错边量,用优化的激光电弧复合焊工艺焊接试板,焊接质量以焊接接头的抗拉强度和强度系数来考核评价.结果表明：激光-电弧复合焊接工艺对于高速列车侧墙焊接中间隙和错边的波动有较大的适应性;并且随着间隙和错边的增加,焊接接头抗拉强度和强度系数的平均值均呈下降趋势;实际生产中,间隙和错边量均不宜大于0.5 mm,试验结果表明激光-电弧复合焊有较好的工程适应性.For the production of side wall of high speed train,the laser-MIG hybrid welding experiments were carried out to study the influence of the dislocation and the gap on welding quality.The tensile test and the strength coefficient of welded joint were used to estimate weld quality for the butt welding with 0 ~ 2.0 mm gap and 0~0.5 mm dislocation.The results show that laser-MIG hybrid welding process has good adaptability to the fluctuation of gap and dislocation in the assembly of side wall of high speed train.With the increase of the gap and dislocation,the average tensile strength and strength coefficient of welded joint decrease.So the gap and dislocation are not larger than 0.5 ram in the actual production.The results show that the engineering adaptability of laser-MIG hybrid welding of side wall in high speed train is good.

关 键 词：侧墙 激光-电弧复合焊 抗拉强度 错边 间隙 

分 类 号：TG456.7[金属学及工艺—焊接]