| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing device of a circular transmission parts which is capable of performing the cold precise machining without generating any distortion in the plastic working. SOLUTION: Mandrels 3... as a seaming means to hold and turn a circular transmission parts stock 4 in a projecting condition of a circumferential end part 4, a parting roller 6 and a stationary roller 7 to be brought into pressure contact with different parts 5a, 5b of a circumferential end part 5 of the circular transmission parts stock held by the mandrels 3... are provided for the device.
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