A Way to Weld Sheet Metal with Double-Electrode GMAW

Abstract:

This paper designed a double-electrode GMAW(gas metal arc welding) system. This system includes main arc and bypass arc. Main arc (Base metal current: I_bm) is supplied with Constant Current power (CC mode) and bypass arc (bypass current: I_bp) is Constant Voltage power (CV mode). Main arc electrode used common carbon wire, bypass arc electrode used water cool copper. Welding experiment shows this DE-GMAW can change common metal transfer into spray transfer with lowest critical total current (I_total) 200 amps. When I_bm decreases and bypass voltage increases, this critical current will increase and it is less than 230 amps when keeping spray transfer. High speed video proved that metal transfer is changed from spray transfer to globular transfer.

• Periodical: Advanced Materials Research (Volume 651)
• Pages: 333-337
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.651.333
• Online since: January 2013
• Authors: Guo Hong Ma, Yu Ming Zhang
• Keywords: Double-Electrode, GMAW, Sheet Metal, Spray Transfer

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