Method of and apparatus for forming forging blank

Details Method of and apparatus for forming forging blank Method of and apparatus for forming forging blank

2006-11-07

2006-11-07

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

C072S344000, C072S377000

Reexamination Certificate

active

07131311

ABSTRACT:
When an actuator is operated, an upper die is displaced downwardly, pressing a lower surface of a workpiece against a forming surface. After the upper die is displaced upwardly, an ejecting member is displaced upwardly to push the workpiece upwardly by a lower die. As the workpiece is displaced upwardly, an outer circumferential surface of the workpiece is squeezed by a squeezer projecting radially inwardly from an inner circumferential surface of an outer ring.

REFERENCES:
patent: 1087583 (1914-02-01), Hansen
patent: 4074559 (1978-02-01), Beane et al.
patent: 4198843 (1980-04-01), Spence
patent: 4413496 (1983-11-01), Diemer et al.
patent: 4649731 (1987-03-01), Eisenmann
patent: 5746085 (1998-05-01), Harada et al.
patent: 04-187340 (1992-07-01), None
patent: 07-323348 (1995-12-01), None
patent: 2000-071046 (2000-03-01), None

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