| 摘要 |
PROBLEM TO BE SOLVED: To enhance engagement strength of recess-projection engagement while improving attachment working efficiency of a tank body and a core plate in a radiator wherein the tank body and the core plate are attached by recess-projection engagement. SOLUTION: A projecting part 5f fitting into a recessed part 5e is formed by plastic working such as coining after mutually attaching the tank body 5b and the core plate 5a. By this, malfunction such as the projecting part 5f sliding on the tank body 5b does not occur in principle when attaching the tank body 5b and the core plate 5a. Accordingly, the engagement strength of recess-projection engagement can be enhanced while improving attachment workability of the tank body 5b and the core plate 5a when attaching the tank body 5b and the core plate 5a by recess-projection engagement. COPYRIGHT: (C)2005,JPO&NCIPI
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