| 摘要 |
PROBLEM TO BE SOLVED: To solve problems in a consumable electrode gas shielded arc welding such that, in normal arc start control, there is a case where arc starting properties are inferior in accordance with welding conditions such as the kinds of welding wire and feeding rates, and, on the other hand, in retraction arc start control where, on an arc start, when welding wire is contacted with a base metal, the welding wire is slightly pulled back so as to securely generate an arc, and thereafter, it is fed once more, since the time required for the arc start per time is made longer, productive efficiency is reduced, and further, since the wear of consumables in a feed motor and a welding torch is severe, their exchanging intervals are made short. SOLUTION: The control method comprises a retraction arc start control and a normal arc start control, thus an arc start is performed in such a manner that the retraction arc start control and the normal arc start control are changed by the operating program of a welding robot. COPYRIGHT: (C)2007,JPO&INPIT
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