ARC WELDING METHOD

摘要

An arc welding method preforms reciprocating wire feed so as to alternately perform forward feed for feeding a welding wire toward an object to be welded and reverse feed for feeding the welding wire in a direction opposite the forward feed. Thus, a short circuit state and an arc state are alternately generated between the welding wire and the object to be welded. The arc welding method includes a normal arc welding step, a normal short circuit welding step, and an abnormal arc welding step. In the abnormal arc welding step, a short circuit state occurs at a second time point, which is before a lapse of a second period from a first time point at which an arc state occurs. Further, in the abnormal arc welding step, the reciprocating wire feed continues until a third time point after a lapse of a first period from the second time point. At the third time point, the reciprocating wire feed is stopped and the abnormal arc welding step is completed. From the third time point, the welding wire is decelerated and the reciprocating wire feed is restarted.