Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1996-06-24
1998-05-05
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
723532, 723552, 2989334, B21D 2200
Patent
active
057460850
ABSTRACT:
A method of forming a gear through cold plastic working comprises preparing a disc-like blank, and pressing conically a central portion of the blank with a uniform pressure from upper and lower sides to cause plastic deformation in the blank thereby to form a gear along a gear-shaped die arranged around the periphery of the blank. The blank material is restrained to flow radially at peripheral end faces of the blank during the forming of the gear.
REFERENCES:
patent: 3370450 (1968-02-01), Scheucher
patent: 3832763 (1974-09-01), Schober
patent: 3910091 (1975-10-01), Samanta
patent: 4939829 (1990-07-01), Maki et al.
"University/industry collaboration leads to precision forge production facility", pp. 322, 324, Mettalurgia Aug. 1990.
Harada Koji
Kanamaru Hisanobu
Butler Rodney
Hitachi , Ltd.
Larson Lowell A.
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