| 摘要 |
PURPOSE:To join uniformly a lap point without forming a nugget by interposing the upper and lower wire electrodes having bigger limited width than the width of the lap joint on a roller electrode and by press-connecting with forming a heated press connection part at limited intervals without welding the lap joint. CONSTITUTION:The upper and lower wire electrodes 5, 5 having the contact face of the width W bigger more than three times of the width G of the lap joint 12 made of metallic plate, etc. are interposed between the upper and lower roller electrodes 3. Each heated pressure connection part 13a is then formed on the lap joint 12 and pressure-connected by adjusting the gap between the centers of adjacent heated pressure connection part 13a within the range of 0.8+ or -0.2mm.
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