Droplet transfer and spatter generation in DC-AC pulse tandem gas metal arc welding

被引：12
|
作者：
Kang, Sanghoon [1 ,2 ]
Kang, Minjung [1 ]
Jang, Yong Hoon [2 ]
Kim, Cheolhee [1 ,3 ]
机构：
[1] Korea Inst Ind Technol, Joining R&D Grp, Incheon, South Korea
[2] Yonsei Univ, Sch Mech Engn, Seoul, South Korea
[3] Portland State Univ, Dept Mech & Mat Engn, Portland, OR 97207 USA
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2020年 / 25卷 / 07期
关键词：
Gas metal arc welding; tandem welding; AC pulse; pulse synchronisation; arc interference; droplet transfer; spatter generation; BEHAVIOR; ALLOY; PHASE; GMAW;
D O I：
10.1080/13621718.2020.1786262
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Tandem welding increases productivity in gas metal arc welding (GMAW). We investigate asynchronous DC-AC pulse tandem GMAW. We analyse welding arc and droplet behaviour for two tandem welding processes, DC standard-AC pulse and DC pulse-AC pulse. Spatters were generated by attractive and repulsive arc interferences. The attractive arc interaction hinders stable droplet transfer and the repulsive one can induce short-circuiting of the hanging droplets. We examine the effect of process parameters on droplet transfer and spatter generation. During DC pulse-AC pulse tandem GMAW, high peak current of the DC pulse increases arc stiffness and enhances droplet detachment. The observed consistency in arc length, droplet formation, and droplet transfer confirms the stability of asynchronous DC pulse-AC pulse tandem GMAW.
引用
收藏
页码：589 / 599
页数：11
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