Hydraulic swage press

Details Hydraulic swage press Hydraulic swage press

2005-02-22

2005-02-22

Crane, Daniel C. (Department: 3725)

Metal deforming

By three or more coacting relatively movable tools

Concurrently actuated tools

C029S237000

Reexamination Certificate

active

06857305

ABSTRACT:
The present specification discloses a swaging press including a piston member co-operable with a plurality of die shoes to drive the die shoes inwardly upon axial movement of the piston member during a swaging operation, the piston member having a frusto-conical recessed region divided into a plurality of circumferentially disposed bearing surface zone of a defined axial length, each of the bearing surface zones having an inner axial end with a numerical radius of curvature less than or equal to the radius of curvature of a circular line forming the lateral edges of each of the bearing surface zones at the inner axial end whereby at least 50% of the outer bearing surface of each said die shoe remains in bearing engagement with the adjacent said bearing surface zone over the axial movement of the piston member during a swaging operation.

REFERENCES:
patent: 2988727 (1961-06-01), Berndt
patent: 3768298 (1973-10-01), Olive-Jones et al.
patent: 4306442 (1981-12-01), Schrock
patent: 4614107 (1986-09-01), Norin
patent: 4766808 (1988-08-01), Schrock
patent: 5657656 (1997-08-01), Evans et al.
patent: 6415488 (2002-07-01), Muto
patent: 25 23 159 (1976-12-01), None
patent: 199 58 103 (2001-03-01), None

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