Method of net-forming an article and apparatus for same

Details Method of net-forming an article and apparatus for same Method of net-forming an article and apparatus for same

2006-04-12

2008-03-18

Banks, Derris H. (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

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

C072S353200, C072S267000, C072S057000

Reexamination Certificate

active

07343768

ABSTRACT:
A method of forming an article such as a helical gear and an apparatus for forming the article are provided. The method includes applying pulsating pressure downward to extruding the work piece and, while the pressure is applied downward, injecting fluid to surround the work piece in fluid. The method eliminates pickling processes and phosphate lube coatings typically required for extrusion and external machining steps subsequently required to remove the coating. Extrusion of a cold net-formed article is thus possible due. An apparatus for carrying out the method is also provided.

REFERENCES:
patent: 3874207 (1975-04-01), Lemelson
patent: 4831861 (1989-05-01), Hofmann et al.
patent: 1550630 (1979-09-01), None
patent: 59039443 (1984-03-01), None
Mubea Inc. marketing information provided to Young Kim in 2004 regarding high frequency spline pressing.

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