Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1992-10-08
1993-09-21
Herrmann, Allan D.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
475344, 744595, B21K 100
Patent
active
052458512
ABSTRACT:
The present invention relates to a differential pinion for automobiles or the like, a metal mold for plastic working the differential pinion, and a method for plastic working with the above metal mold. And particularly the differential pinion of the present invention is provided with an end relief section which is effective to reduce a noise and has a continuous fiber flow from a tooth face to the end relief section providing a high pitting resistance. The metal mold for plastic working the differential pinion of the present invention can provide the internal pressure working area of the die in a position deep below the open end by a required distance therefrom, thereby providing the metal mold with higher rigidity and strength. Further, in the plastic working method of the present invention, it is very easy to position the punch under pressure stress in the axial direction.
REFERENCES:
patent: 2713277 (1955-07-01), Kaul
patent: 3780413 (1973-12-01), Burgdorf
patent: 4008599 (1977-02-01), Dohmann
patent: 4299112 (1981-11-01), Kondo et al.
patent: 4942781 (1990-07-01), Hori
European Search Report; Patent No. 90117967.1.
Aoyama Susumu
Ishinaga Nobuyuki
Kobayashi Kazuto
Aida Engineering Ltd.
Herrmann Allan D.
M.H. Center Limited
Trousdell William O.
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