Patent ID: 8604387
Filing Date: 2013-12-10
Classification: B23K

Abstract:
1. A control method for an arc welding apparatus having a neck determination part, a control state storage part, an arc/short-circuit determination part and a welding output control part, said method comprising: detecting welding voltage; calculating a change amount of the welding voltage; determining neck of a droplet based on the change amount of the welding voltage and a neck determination threshold of a droplet using the neck determination part, the neck being generated prior to a transition from a short circuit state to an arc state; storing a short-circuit processing state using the control state storage part at a time at which neck is determined; after said determining of neck, determining any one of an arc period and a short-circuit period using the arc/short-circuit determination part based on the welding voltage; and determining that neck is wrongly determined in said determining of neck, and carrying out a short-circuit processing from the stored short-circuit processing state using the welding output control part in response to a short-circuit period being determined by the arc/short-circuit determination part when a first predetermined period has passed after said determining of neck.