| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for designing a sizing die by which a sizing die having appropriate corrective faces can be produced in order to improve the dimensional precision of sintered parts corrected and finished with the sizing die. SOLUTION: In the production of sintered parts such as a sintered gear 1 in which the distance from the center to each part in the faces to be sized changes, the tooth top 3, the tooth face 4 and the tooth bottom 5 of a tooth 2 are defined as faces to be sized, and a spring-back amount x of each face to be sized when the faces are subjected to sizing is made constant in the whole region of the sizing region, and then the extend of the constant spring-back amount x is reduced from the tooth profile 6 of the product to the central direction of the product, thereby designing the tooth profile 7 of the sizing die. COPYRIGHT: (C)2007,JPO&INPIT
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