| 摘要 |
An output control method is provided for a pulse arc welding in which a welding current flows for one pulse period consisting of a peak period with a flow of a peak current and a base period with a flow of a base current. External characteristics of a welding power source are preliminarily set by a slope Ks, a welding current reference value Is and a welding voltage reference value Vs. The absolute value va of the welding voltage and the absolute value ia of the welding current during welding are detected. The integration Svb=∫(Ksxia-KsxIs+Vs-va) dt is calculated from a starting point of an n-th pulse period. The n-th pulse period is ended when the integration Svb becomes no smaller than zero during the base period. Then, the (n+ 1 )-th pulse period is started.
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