| 摘要 |
PROBLEM TO BE SOLVED: To provide a resistance spot welding method by which higher joint strength can be achieved in a shorter welding time, in resistance spot welding of a set of sheets including high-strength steel sheets. SOLUTION: The invention relates to the resistance spot welding method in which a set of sheets with two or more steel sheets stacked are held between a pair of welding electrodes and welded by conducting an electric current while pressurizing the sheets. The method includes at least two processes of a regular conduction process in which a nugget with a prescribed diameter is formed by conduction and a postheating conduction process in which a pressurizing force is increased more than in the regular conduction process to have quiescence of 1-20 cycles and short conduction. COPYRIGHT: (C)2010,JPO&INPIT |
