| 摘要 |
<P>PROBLEM TO BE SOLVED: To bond three or more metal sheets with sufficient strength by one-side spot welding. <P>SOLUTION: A slit S passing through an upper metal sheet 1 and an intermediate metal sheet 2 is formed between a pair of electrodes 10 and 20, in which the width of a slit 2a in the intermediate metal sheet 2 is smaller than the width of a slit 1a in the upper metal sheet 1, to provide a level difference S0 between the slit 1a and the slit 2a. <P>COPYRIGHT: (C)2012,JPO&INPIT |
