| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method which can simply perform projection welding even between the highly conductive materials to be welded made of copper or aluminum. SOLUTION: Regarding the projection welding method of the highly conductive materials to be welded where the first highly conductive material W1 to be welded and the second highly conductive material W2 to be welded are faced each other in such a manner that projections P1, P2 are confronted, a highly conductive metallic thin sheet W3 made of the same metallic material as that of the first highly conductive material to be welded or the second highly conductive material to be welded is interposed between the projections, and a pulse-shaped welding current is made to flow between the first highly conductive material to be welded and the second highly conductive material to be welded in a state where elastic pressurizing force is applied thereto, the highly conductive metallic thin sheet is made of the one in which a plurality of highly conductive metal foils w are superimposed, and the first highly conductive material to be welded and the second highly conductive material to be welded are provided with recessed parts V1 to V4 receiving the swelling of the highly conductive metal foils generated upon diffusion bonding around the respective projections. COPYRIGHT: (C)2011,JPO&INPIT
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