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SHAFT THICKENING METAL MOLD, SHAFT THICKENING DEVICE, STEPPED SHAFT MANUFACTURING METHOD AND STEPPED SHAFT
SHAFT THICKENING METAL MOLD, SHAFT THICKENING DEVICE, STEPPED SHAFT MANUFACTURING METHOD AND STEPPED SHAFT
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机译：轴厚金属模具，轴厚设备，阶梯轴的制造方法和阶梯轴
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摘要
To provide a shaft thickening metal mold and a shaft thickening device which are suitably used for shaft thickening of a shaft material having a large diameter part and are excellent in durability, and to provide a manufacturing method for a stepped shaft having two large diameter parts, and a stepped shaft.SOLUTION: A shaft thickening metal mold 120 in a shaft thickening device 100 used for manufacture of a stepped shaft 1 comprises metal mold pieces 140 to 142 which are combined with each other thereby forming a ring form fitting to an outer periphery of a shaft material 2 and are divided in a circumferential direction of the ring form so as to be detachable in a radial direction with respect to the shaft material 2. The metal mold pieces 140 to 142 respectively have: a molding surface which is located on one end side in axial direction of the ring form, and molds an enlarged part 6 of the shaft material 2; an inner diameter surface located on an inner diameter side of the ring form; and a pair of abutting surfaces which abut against adjacent other metal mold pieces in the circumferential direction of the ring form. each corner part, which is formed by the molding surface, the inner diameter surface and the abutting surface, is chamfered.SELECTED DRAWING: Figure 7
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