| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that, in a material having the low specific resistivity such as aluminum, a welding starting end is subjected to insufficient heat input and incomplete penetration under the same condition as that during the stationary welding period, and occurrence of crater at a welding terminating end can be reduced by controlling the welding voltage and the wire feeding rate, however the crater state can not be consistently formed only by making an adjustment so that the welding voltage and the wire feeding rate during the end welding period become those during the stationary welding period to those during the welding completing point of the end welding period. SOLUTION: Excellent welding quality can be realized by performing the welding with the pulse current waveform different from that the stationary welding period during the start welding period and the end welding period according to the set material of a welding wire and the set material of an object to be welded. COPYRIGHT: (C)2009,JPO&INPIT
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