Research on metal transfer in dual bypass MIG welding of aluminum

Yu Shi, Zuoyan Chen, Cheng Xue, Xiaopei Liu, Yuming Zhang

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The dual bypass metal inert gas (DB-MIG) arc welding method is presented and an experimental system is established. In this method, a conventional MIG welding arc is used as main arc and two symmetrical TIG welding arcs with controllable current are introduced as bypass arc. A coupled arc is formed by main and bypass arcs to carry out welding. Due to the shunt effect of bypass arc, base metal input current can be decreased effectively while wire melting current keeps high, and bypass arc force has great influence on metal transfer. A special narrow-band-filter system is built to realize high speed video of metal transfer behaviors without laser backlight, and high speed photographic images under different bypass current parameter conditions are obtained. Analysis results show that metal transfer mode changes with the change of current parameters of bypass arc. Then the changes in the forces acting on the droplet and the effects of these changes on the metal transfer behaviors are analyzed and the experimental phenomena are explained. Analysis shows that the bypass arcs and currents lower the critical current needed to achieve the desired spray transfer.

Original languageEnglish
Pages (from-to)76-79+85
JournalJixie Gongcheng Xuebao/Chinese Journal of Mechanical Engineering
Volume46
Issue number20
DOIs
StatePublished - Oct 20 2010

Keywords

  • Aluminum alloy
  • Dual bypass arcs
  • MIG welding
  • Metal transfer

ASJC Scopus subject areas

  • Mechanical Engineering
  • Computer Science Applications
  • Applied Mathematics

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