| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a laminated heat exchanger which has high reliability and can keep strong joinability. SOLUTION: In the manufacturing method of the laminated heat exchanger comprising a core part 11 in which flow passages 15 of heat exchanging fluid are formed between two laminated metallic sheets 1A, 1B and tank parts 12 on the inlet side and the outlet side which are arranged on both ends of the core part so as to communicate to the flow passages 12, before laminating two metallic sheets and forming recessed groove parts on the surface of the metallic sheet of at least one side in places where are non-joined parts, by performing diffusion joining after laminating the metallic sheets by taking the recessed groove parts as the inside, the metallic sheets are joined each other while leaving the recessed groove parts as the non-joined parts. After performing the diffusion joining, the metallic sheets in the portions of the non-joined parts are plastically deformed and bulged by introducing a pressurized fluid into the non-joined parts. In this way, the flow passage parts in the core part and the tank parts 12 are formed at the same time. COPYRIGHT: (C)2006,JPO&NCIPI |
