| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a resistance spot welding method, in resistance spot welding for a parts combination comprising high-strength steel sheets, which solves the conventional problems, and can achieve higher joint strength in a shorter welding time. <P>SOLUTION: In the resistance spot welding method where a parts combination obtained by superimposing two or more steel sheets is held by a pair of welding electrodes, electric current is made to flow while applying pressure, and welding is performed, the method includes at least following two steps: a normal energization step where a nugget with a prescribed size is formed by energization; and a post-heating energization step where, while inserting the nugget under the pressurizing force same as that in the normal energization step, suspension under 1 to 20 cycles and energization in a short time are performed. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
