| 摘要 |
PURPOSE:To increase a joining strength in plastic flow parts by forming joining groove parts positioned at the end of the impressing direction of a pushing force to have inclined planes approaching the extension line of the impressing direction of the pushing force as the groove parts are nearer to the end. CONSTITUTION:Both joining faces A and B are opposite to each other and a joining space C is formed between a change gear 1 and a clutch cone 2 when the gear 1 and cone 2 are joined in a specified joining relation. The joining space C consists of inclined planes having a gradually larger width toward an aperture C1, in other words, both the joining faces A and B are inclined planes which gradually approach the extension line of the applying direction of the pushing force F causing plastic flow as the faces A and B are nearer to the end of the applying direction. A joining material 3 is pushed into the joining space C from the aperture C1 side by the specified pushing force F by a punch to be flowed plastically, to be expanded in the crossing direction to the pushing direction, that is, the lateral direction, and to be flowed and to be filled in the joining grooves 4a, 4b, 5a, and 5b.
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