Influence of Pulse Condition on Weld Penetration Shape: Control Method of Penetration Shape and Welding Deformation using the Low Frequency Pulsed Arc Welding (Report 1)

In pulsed arc welding, there are a lot of factor that have influence on weld bead shape, and the relationship between the welding parameters and the weld phenomena is complicated. So, it is often selected the welding condition by experiment and experience. In this research, we conduct the heat conduction analysis, and clarify the influence of the pulse condition of the heat source on the welding bead formation. We clarify that melting efficiency in pulsed arc welding can be improved greatly when the peak ratio is high and the frequency is low even if the average heat input was the same to no-pulsed arc welding.