Numerical Prediction of Feasibility to Lower Droplet Temperature in Duplex Current Feeding MIG Welding Process

Abstract

In the conventional MIG welding, it is difficult to control the droplet temperature because of the unique relationship between the welding current and the wire feed speed. This study aims to develop a novel MIG welding process with duplex current feeding (DCF-MIG), which enables to control the welding current and the wire feed speed independently by feeding the secondary current near the wire tip in addition to the conventional MIG current. In this paper, a feasibility to achieve lowering the droplet temperature using DCF-MIG welding was investigated through numerical analysis. Consequently, the decrease in the droplet temperature in the DCF-MIG welding was predicted to be feasible.