METHOD OF MANUFACTURING RETAINER FOR ONE-WAY CLUTCH

摘要

PROBLEM TO BE SOLVED: To reduce man-hours and the number of dies to reduce cost, and to reduce a material cost and to simplify each molding die by the proper use of material for every function so as to be suitable for multiple kind and small quantity production. SOLUTION: The inner peripheral part of a disc-like plate material 10 is punched to form a primary molding 11 integrally having a first flange part 12 of ring shape and a large number of frame pieces 13 projected with specified length in an axis direction from the inner peripheral side of the first flange part 12. Each frame piece 13 of the primary molding 11 is axially bent in relation to the first flange 12 to form a secondary molding 14 with a large number of frame pieces 13-1 axially projected at a specified pitch in a circumferential direction at the inner peripheral part of the first flange part 12. A second flange part 15 of ring shape almost equal in outer diameter to the first flange part 12 is provided and arranged concentrically with the first flange part 12, and the inner peripheral part of the second flange part 15 is integrally fixed to each frame piece 13-1 of the secondary molding 14.