| 摘要 |
The present invention is to provide an arc welding method which prevents arc start failure when arc start is performed even in a circumstance that slag has been generated when arc welding has been finished. According to the present invention, welding is performed by using CO_2 gas as shielding gas, feeding a welding wire (100) toward an object to be welded (200), and, at the same time, applying welding current between the welding wire (100) and the object to be welded (200), and generating arc with the welding current. The arc welding method includes: a welding process for performing welding of the object to be welded (200) by controlling the welding current; and a welding completion process for performing control for making a waveform of the welding current a trapezoid shape when welding of the object to be welded (200) is finished. |
