| 摘要 |
PROBLEM TO BE SOLVED: To obtain satisfactory welding quality by improving the controllability of arc length when the arc length is set to be high in a consumable electrode gas shielded arc welding using a welding source having constant current properties, . SOLUTION: In the consumable electrode gas shielded arc welding method, welding voltage Vw between a base metal and a welding wire is set by the set value Vs of the welding voltage; the welding voltage Vw under welding is detected; the detected value Vd of the welding voltage is subjected to moving averaging to calculate the average value Vra in the movement of the welding voltage; at this time, when the set value Vs of the welding voltage is less than a beforehand decided standard value of high arc length, the average value Vra in the movement of the welding voltage is decided as the control set value Vs of the welding voltage; at the time when the set value Vs of the welding voltage is higher than the standard value of high arc length, the set value Vs of the welding voltage is decided as the control set value Vsc of the welding voltage; and the welding current values Isc, Iw by constant current properties are changed in such a manner that the detected value Vd of the welding voltage is made almost equal to the control set value Vsc of the welding voltage. COPYRIGHT: (C)2006,JPO&NCIPI
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