上海交通大学学报

上海交通大学学报（自然版）

• 金属学与金属工艺 • 上一篇    下一篇

三丝GMAW焊接过程电弧中断现象分析

华学明a，b，王飞a，b，马晓丽a，b，吴毅雄a，b，c   

  1. (上海交通大学 a.材料科学与工程学院 焊接工程技术研究所；b.上海市激光制造与材料改性重点实验室；c.金属基复合材料国家重点实验室， 上海 200240)
  • 收稿日期:2009-10-12 修回日期:1900-01-01 出版日期:2010-04-29 发布日期:2010-04-29

Research on Arc Interruption of Triplewire GMAW

HUA Xueming，WANG Fei，MA Xiaoli，WU Yixiong   

  1. (a.Welding Engineering Institute of Material Science and Engineering； b.Shanghai Key Laboratory of Materials Laser Processing and Modification；c.State Key Laboratory of Metal Matrix Composite, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2009-10-12 Revised:1900-01-01 Online:2010-04-29 Published:2010-04-29

摘要： 为揭示三丝GMAW焊接过程电弧干扰、电弧中断的原因及影响因素，基于信号采集系统和高速摄像系统同步采集焊接电流、焊接电压波形和电弧形态，理论分析三丝焊电弧偏移量的影响因素.结果表明：焊丝间距越大，电弧长度越短，焊接电流和电弧中断频率越小.针对三丝焊电弧中断现象，分析了电弧偏移量增大引起电弧长度增加从而造成电弧中断的原因.以三丝焊理论分析结果指导三丝GMAW焊工艺参数的选择，通过三丝GMAW焊接工艺参数的合理选择可获得无电弧中断的稳定焊接过程.

关键词: 三丝, 熔化极气保护焊接, 电弧中断, 电弧偏移

Abstract: To reveal the mechanism of interference and arc interruption during triplewire GMAW, signal acquisition system and highspeed camera synchronous acquisition system were developed, which sampl the welding electric waveform and arc features of triplewire GMAW. The factors of arc deflection were analyzed based on electromagnetic theory and it is concluded that arc interruption frequency decreases with the increase of interwire distance, welding current increase and with decrease of welding current. The experimental results show that there is no arc interruption of triplewire GMAW by properly selection of interwire distance and welding current combination on a base of theoretical analysis. And the longer arc length brings about arc plasma upward and arc interruption occurs due to electromagnetic force among arcs.

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