Data for: Effect of main arc voltage on arc behavior and droplet transfer in tri-arc twin wire welding
With the latest developments in the welding technology, newer and more advanced welding processes have been developed, GMAW has been modified to obtain faster deposition. The development trend of welding has gradually changed from single-wire to double-wire and single-arc into multi-arc. These new welding methods have demonstrated significant advantages in terms of deposition rate and welding speed. However, all of them are based on the traditional GMAW principle. During the welding process, the welding wire, the arc, and the work-piece are connected in series. Hence, the welding current in the conventional GMAW is the same for the anode and the cathode. Thus, increasing the welding current to improve the deposition rate would also cause an increase in the base metal heat input, which may lead to welding deformation and weld metal performance degradation. Therefore, in order to improve the welding deposition rate, the traditional GMAW must be changed. Novel a tri-arc twin wire arc welding has been developed to provide an alternative way to increase the deposition rate and obtain a stale welding process. And solve the questions about high deposition rate, low heat input of the twin wires. This study created a tri-arc twin wires welding method that can adjust the current of wire and workpiece. It introduced three arcs between the twin wires and the weld workpiece. The current flowing through the wires and the workpiece were independently controlled by variable polarity power supply and the DC (Direct Current) pulse power supply. The introduction of the M arc changed the distribution of arc energy during the welding process, increase the M arc current could reduce heat input and increase production efficiency.