Study on the Arc Characteristic and Metal Transfer in Laser-MIG Double Wires Hybrid Welding

doi:10.3901/JME.2016.02.033

Abstract

Abstract: The effect of laser power, wire feeding velocity, laser-arc distance and laser defocusing distance on welding stability, arc characteristic and metal transfer are investigated with the welding system of laser-metal inert-gas(MIG) double wires hybrid welding,. Meanwhile, some parameters are selected to evaluate the welding stability, arc characteristic and metal transfer including the coefficient of variance of welding voltage, the arc offset angle and the mode and frequency for metal transfer. It is found that, when the laser power is 1 000 W, the welding process is the most stable. With the laser power increasing, the arc offset angle decreases firstly and then increases. The mode of metal transfer is globular transfer and the metal transfer frequency increases firstly and then decreases. When the wire feeding velocity is 4 m/min, the stability for the leading and trailing arc is the best. As the wire feeding velocity increases, the arc offset angle decreases firstly, then increases and finally keeps unchanged. When the laser defocusing distance is –1 mm, the metal transfer frequencies for leading and trailing wire are 8.6 Hz and 6.3 Hz respectively.

Key words: arc behavior, laser-MIG double wires hybrid welding, metal transfer, welding stability

CLC Number:

TG456

ZHU Yanli, LI Huan, XIANG Ting, XUE Long, HUANG Jiqiang. Study on the Arc Characteristic and Metal Transfer in Laser-MIG Double Wires Hybrid Welding[J]. Journal of Mechanical Engineering, 2016, 52(2): 33-40.

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