| 摘要 |
<p> The stability of arc welding performed by cyclically repeating forward feed and reverse feed of a welding wire is improved in the present invention. An arc welding control method, in which a forward-feed period and a reverse-feed period at a feed speed (Fw) are cyclically repeated, the output of the welding power source is controlled at a constant voltage so as to be equal to a voltage target value (Ecr), and welding is performed by repeating a short-circuit period and an arc period, wherein during the forward-feed period (Tas) during the arc period, the voltage target value (Ecr) is reduced over time. As a consequence thereof, during the forward-feed period (Tas) within the arc period, even if the arc length is shortened and the welding voltage (Vw) is reduced, the welding current (Iw) can be reduced, thereby making it possible to keep the short-circuit occurrence timing fixed, and improve stability of the welding state.</p> |
