YAG激光与脉冲MIG复合焊接

研究了YAG(掺钕钇铝石榴石 ,Nd 3:Y3Al5O1 2 )激光与脉冲MIG电弧复合焊接铝合金的新工艺 ,设计制造了复合焊接机头 ,探讨了各种规范参数对焊缝成形的影响规律及激光与电弧的复合作用。结果表明 ,在比较宽的参数范围内YAG激光 -脉冲MIG复合焊接铝合金焊缝成形美观 ,无气孔等缺陷 ,熔深与激光单独焊比增加 4倍 ,与脉冲MIG焊接比增加 1倍以上 ,焊速显著提高 ,是一种理想的焊接工艺。

Study of YAG Laser-Pulsed MIG Hybrid Welding Process

In this paper,YAG laser pulsed MIG arc hybrid welding process for aluminum alloy has been studied.A welding head for YAG laser pulsed MIG arc hybrid welding has been designed and manufactured,which was mounted on an arc welding robot.In order to find out the optimum welding parameters,the effects of YAG laser power and defocusing distance,the distance between laser beam and arc center,the welding speed and arc current,as well as AC/DC pulse arc on the weld bead formation have been investigated.By means of a high speed video camera,the behavior of pulsed arc and laser induced plasma plume were observed.The experiment results showed that in a wide range of parameters with YAG laser pulsed MIG arc hybrid welding for aluminum alloy,the weld formation was very sound.The weld penetration was increased by more than 4 times compared with YAG laser only,and the welding speed was obviously increased compared with MIG only.It has been proved that the YAG laser pulsed MIG arc hybrid welding for aluminum alloy is a perfect process.