| 摘要 |
PROBLEM TO BE SOLVED: To automatically control a welding electric current Iw to be a proper value while manually adjusting a welding speed and a feed speed of a filler wire 4 to make a weld quality uniform corresponding to a temperature rise of a base material due to the progress of a welding process in non-consumable electrode arc welding manually carried out using the filler wire 4. SOLUTION: In a method for controlling an welding current in non-consumable electrode arc welding carried out by manually feeding the filler wire 4 to a molten pool, wire voltage Vw between the filler wire 4 and the base material 2 is detected, and a feed speed Fw of the filler wire 4 is calculated based on the wire voltage Vw, and the welding current Iw is automatically changed according to the feed speed Fw of the filler wire 4. COPYRIGHT: (C)2007,JPO&INPIT
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