Easy removed die core device used for cold swaging

Details Easy removed die core device used for cold swaging Easy removed die core device used for cold swaging

1998-02-18

1999-11-16

Hail, III, Joseph J.

Metal deforming

Tool and/or tool holder

Including flexible or yieldable tool or support

72398, 29894362, B21B 2500

Patent

active

059836989

ABSTRACT:
An easy removed die core device used for cold swaging comprising a mandrel, two end supporting members, an outer spring and a plurality of inner springs, wherein, the mandrel is extended into the position between the two end supporting members which are provided with coaxial stepped stubs, each stub is provided with a C shaped locking ring, so that the inner and the outer springs can engage each with a stub in a coaxial arrangement, and can resist the swaging force by their inherent resiliency; the end supporting members are provided each with a cam lever which is used to mount or dismantle the inner and the outer springs between the end supporting members in a easy way, while the threads on the outer spring has on the lateral shoulders thereof cutting angles, so that when the springs are drawn out of the inner wall of the shaped workpiece, the rough edges on the inner wall formed during forging can be planed simultaneously thereby, thus the objects of easy removing the die core device and rough edges planing can be obtained.

REFERENCES:
patent: 1120271 (1914-12-01), Buescher
patent: 2633978 (1953-04-01), Brown
patent: 2723426 (1955-11-01), Pelley
patent: 3814565 (1974-06-01), Cahour et al.
patent: 4428220 (1984-01-01), Rammesten
patent: 4502308 (1985-03-01), Kelly
patent: 4746386 (1988-05-01), Sato et al.
patent: 4930338 (1990-06-01), Tokura

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