Patent ID: 7145101

Claim:
An output control method for a pulse arc welding in which welding is performed by causing a welding current to flow for one pulse period including a peak period with a flow of a peak current and a base period with a flow of a base current, and by applying a welding voltage between a welding wire and a matrix material, the method comprising the steps of: preliminarily setting external characteristics of a welding power source by a slope Ks, a welding current reference value Is and a welding voltage reference value Vs; detecting an absolute value va of the welding voltage and an absolute value ia of the welding current during welding; calculating integration Svb=∫(Ks×ia−Ks×Is+Vs−va)dt from a starting point of an n-th pulse period; ending the n-th pulse period when the integration Svb becomes no smaller than zero during a base period following a predetermined peak period; and starting a (n+1)-th pulse period subsequent to the n-th pulse period.