Patent ID: 9242285
Filing Date: 2016-01-26
CPC Classification: B21D,B21K,F16H,Y10T

Claim Text:
1. A manufacturing device for a drive plate that manufactures a drive plate including (i) a plate portion that transfers a drive force and (ii) a ring gear portion provided at an outer periphery of the plate portion, the manufacturing device comprising: a compression punch that compresses a side wall portion of a raw material in an axial direction, the raw material including a bottom surface portion and the side wall portion which is cylindrical and provided to extend upright from an outer peripheral end portion of the bottom surface portion; a compression die disposed to face the compression punch in the axial direction and having a toothed shape formed on an inner peripheral surface of the compression die; and a die that restrains the bottom surface portion, wherein when the compression punch compresses the side wall portion, which is disposed inward of the inner peripheral surface of the compression die, in the axial direction, the compression punch presses the raw material against the compression die, and thereafter the compression die is pushed by the compression punch to form a toothed shape on the side wall portion while both the compression die and the compression punch are relatively moving in the axial direction with respect to the die that restrains the bottom surface portion to form the ring gear portion.