Effects of arc pressure based inter-heat sources distance on arc plasma behavior in Pulsed Nd: YAG laser/TIG arc hybrid welding process
This work is aiming at studying the effects of arc pressure based inter-heat sources distance on the dynamic behavior of arc plasma in Pulsed Nd: YAG laser/Tungsten Inert Gas (TIG) arc hybrid welding process. First, the effect of process parameters such as height of tungsten electrode, inclination angle of TIG torch and arc current on the arc pressure on workpiece surface was investigated experimentally in order to get a quantitative understanding of the influences of TIG arc welding parameters on the arc-pressure based inter-heat sources distance d of hybrid welding process. And then hybrid welding experiments were conducted with five different d, i.e. d= -0.75 mm, -0.25 mm, 0.25 mm, 0.75 mm, and 1.25 mm. During hybrid welding processes, transient evolution of arc plasma was recorded by a high speed CCD camera. Under the conditions considered in this paper, strongest contraction of arc plasma was observed in the welding process with d= -0.25 mm. With d is less than -0.25 mm, arc plasma would become fluctuant during laser pulse duration. When d is greater than -0.25 mm, however, the increase of inter-heat sources distance resulted in the weakening of arc plasma contraction.
Pulsed Nd:YAG laser/TIG hybrid welding Arc pressure based inter-heat sources distance Arc plasma
Linjie Zhang Suck-Joo Na Jianxun Zhang
Department of Mechanical Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Department of Mechanical Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of State key laboratory of mechanical behavior for materials, Xi’an Jiaotong University, Xi’an, 710049,
国际会议
济南
英文
1-11
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）