| 摘要 |
PURPOSE:To perform stable welding that generates little spatter in consumable electrode type gas shielded arc welding by using an arc current pulse current consisting of main pulse current and sub-pulse current. CONSTITUTION:When a base metal to be welded 18 by generating an arc 17 between a consumable welding wire 16 in welding torch 15 and a base metal to be welded 16 under the presence of shielding gas, welding current is set to pulse current constituted of current values 6, 7, 8. In this case, current generating devices 3, 4, 5 are switched by a time 2 to be times 9, 10, 11, 12 to obtain pulse current having main pulse 13 and sub-pulse 14 of smaller current than the main pulse. A droplet is formed at the end of the welding wire by the main pulse current 13, and the droplet is separated from the tip of the wire 16 to a molten pool by the sub-pulse 14. Thus, stable consumable electrode type gas ghielded welding that generates little spatter can be performed. |
