パルスアーク溶接方法、溶接物の製造方法および溶接用電源装置

摘要

PROBLEM TO BE SOLVED: To restrain the occurrence of a spatter in pulse arc welding.;SOLUTION: In a pulse arc welding method using shield gas and a welding wire, a repeating welding period T_w includes a first period T₁, a second period T₂, and a third period T₃. In the first period T₁, a first peak current value I_p1 is supplied with a first pulse width of 10 msec or less as a welding current I. In the second period T₂ following the first period T₁, a second peak current value I_p2 having a larger current value than the first peak current value I_p1 is supplied with a second pulse width of 100 nsec or less as the welding current I. In the third period T₃ following the second period T₂, a base current value I_b having a smaller current value than the first peak current value I_p1 is supplied as the welding current I.;SELECTED DRAWING: Figure 4;COPYRIGHT: (C)2019,JPO&INPIT