| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent malfunction of droplet constriction detection control when a plurality of welding power sources are simultaneously used.SOLUTION: A common workpiece 2 is welded using arcs 31, 32 generated by a first welding power source PS1 and a second welding power source PS2, respectively, the first welding power source PS1 has a droplet constriction detection control function, and a maximum change ratio of a second welding current Iw2 of the second welding power source PS2 during arc period is set to be smaller in a case in which a first welding current Iw1 from the first welding power source PS1 is supplied than in a case in which the first welding current is not supplied. Consequently, even if the second welding current Iw2 changes due to a sudden change of an arc length, malfunction of a droplet constriction detection control of the first welding power source PS1 can be suppressed.</p> |
