| 摘要 |
PROBLEM TO BE SOLVED: To stably form a weld zone regardless of the kind or the combination of works and thereby generate high weld strength between the works. SOLUTION: In a first energizing section, an electrode 5 is pushed into metal plates 2, 3 and the metal plates 2, 3 are pressurized and energized with such a small current as not to form a weld zone between the metal plates 2, 3. Successively, the metal plates 2, 3 are energized in a second energizing section with such a large current as to have a current value higher than that in the first current section and as to enable welding between the metal plates 2, 3. Thus, a joined body having an annular weld zone 11 formed between the metal plates 2, 3 is obtained. COPYRIGHT: (C)2008,JPO&INPIT
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