Metal deforming – By use of closed-die and coacting work-forcer
Patent
1987-07-24
1988-09-27
Bray, W. Donald
Metal deforming
By use of closed-die and coacting work-forcer
291592, 72329, 72359, B21D 2200
Patent
active
047732482
ABSTRACT:
The present invention relates to a process for the manufacture of parts having a tooth profile and boss by means of a press machine. The process of the present invention comprises a blank with a boss, which is produced in a prior operation by machining, cold forging, warm forging or other method, being positioned on a female die having a tooth profile formed thereon on a mirrored surface, said female die having a 20.degree.-150.degree. taper at its inlet, and having a shape conforming to the bottom configuration of said blank, and wherein an ironing process is performed by means of a punch having a shape conforming to the top configuration of said blank.
REFERENCES:
patent: 3258834 (1966-07-01), Rork
patent: 3688549 (1972-09-01), Ohnishi et al.
patent: 3694127 (1972-09-01), Takahashi et al.
patent: 4509353 (1985-04-01), Ike et al.
patent: 4672729 (1987-06-01), Hoguchi et al.
Bray W. Donald
Kabushiki Kaisha Yokoyama Seisakusho
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