| 摘要 |
PROBLEM TO BE SOLVED: To provide a resistance spot welding method for steel plates by which the service life of electrodes can be lengthened without causing donut-like nugget such that fused and solidified part exists only in the outer peripheral part of the welded part. SOLUTION: When the resistance spot-welding is performed by supplying welding current between the electrodes under state of loading the pressure by interposing piled steel plates 1a, 1b with the electrodes 2a, 2b from both sides, the pressurizing force of the electrodes and the electric power amount (welding current value×electric supplying time) are adjusted so that the smallest plate thickness at the welded part after welding is not lower than 80% of the whole plate thickness of the piled steel plates. COPYRIGHT: (C)2003,JPO
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