Method and apparatus for producing a stepped hollow article

Details Method and apparatus for producing a stepped hollow article Method and apparatus for producing a stepped hollow article

1984-02-02

1986-04-08

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72354, 72359, B21D 2832

Patent

active

045804311

ABSTRACT:
A method and apparatus for producing a stepped hollow component such as, for example, a gear blank. A solid slug, provided with a disc portion and a projecting portion, is placed in a rigid cylindrical recess formed between a counterpunch and a hollow mold. An annular upper surface of the disc portion and a side surface of the projecting portion are precompressed by an outer punch so as to restrain an outer periphery of the solid slug. A closed-base hole is formed in a center of the solid slug by a plastic deformation caused by an inner punch. The plastic deformation by the inner punch causes material of the solid slug to flow biaxially in the radial and axial direction of the solid slug.

REFERENCES:
patent: 1352911 (1920-09-01), Paque
patent: 2586336 (1952-02-01), Huck
patent: 2621344 (1952-12-01), Friedman
patent: 3280613 (1966-10-01), Schrom
patent: 3842646 (1974-10-01), Kuhn

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