WORKING JIG, DIE SET USING THE WORKING JIG AND MANUFACTURING METHOD FOR WORKING JIG

Abstract: according to an embodiment, a working jig has a body formed of metal having wear-resistance. a tapered surface is formed in an outer circumference of a distal end portion of the body. the tapered surface has a shape in which a diameter decreases toward an end face of the body. a center hole is formed in the body. slits are formed at a plurality of positions in a circumferential direction of the body. the slits extend from the end face to positions in a length direction of the body in a direction along an axis. chuck elements are formed between the slits which are adjacent to each other in the circumferential direction of the body. punching portions are formed at distal ends of the chuck elements, respectively.

Inventor(s): Yohei MITSUMORI

CPC Classification: B21D39/048 (WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire ))

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