| 摘要 |
PROBLEM TO BE SOLVED: To provide an eccentric body shaft gear of an eccentric oscillation type speed reducer that can make finishing costs (while maintaining predetermined quality).SOLUTION: There is provided a method of manufacturing an eccentric body shaft gear of an eccentric oscillation type speed reducer 10 which includes an eccentric body shaft 18 having first and second eccentric bodies 20 and 22, and an eccentric body gear 30 for rotating the eccentric body shaft, the eccentric shaft gear having a fitting hole 30P, in which a gear fitting part 70 provided for the eccentric body shaft is fitted, at its radially center part. The method include: a process A of forming a tooth part 30T at an outer periphery of a raw material of the eccentric body shaft gear; a process B of forming the fitting hole in the radial center of the raw material of the eccentric body shaft gear; and a process C3 of subjecting the tooth part to high-frequency hardening to make tooth surfaces higher in hardness than an inner peripheral surface of the fitting hole. |
