Method of making a flanged tubular metallic part

Details Method of making a flanged tubular metallic part Method of making a flanged tubular metallic part

2006-03-21

2006-03-21

Larson, Lowell A. (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

C356S329000

Reexamination Certificate

active

07013696

ABSTRACT:
A method of making a flanged tubular metallic part by cold forging is provided. The method comprises a step of forming an axial depression in a blank and a flange forming step of making the depression axially deeper while causing a metal of the blank to flow radially outward thereby forming the blank into an intermediate product having a flange. The flange forming step includes axially moving an inner punch of a die assembly so as to cause a leading end of the inner punch to be positioned more forward than a backward side surface of the flange thereby causing the intermediate product to be formed with a sleeve portion that is position backward of the flange while allowing an outer punch of the die assembly to apply a biasing force to a backward side surface of the flange during formation of the flange.

REFERENCES:
patent: 2748932 (1956-06-01), Kaul
patent: 3186209 (1965-06-01), Friedman
patent: 6357274 (2002-03-01), Tanaka et al.
patent: 645083 (1962-07-01), None
patent: 4-200833 (1992-07-01), None
patent: 8-52530 (1996-02-01), None
patent: 2002-011543 (2002-01-01), None

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