Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1981-01-05
1982-08-03
Gilden, Leon
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72356, B21D 2200
Patent
active
043422136
ABSTRACT:
A tulip-shaped metal part such as a yoke component of a tri-port type constant velocity universal joint is manufactured by single-stage closed chamber extrusion of a solid cylindrical metal rod. The metal rod is inserted into two opposingly engaged dies to protrude into a space defined in the dies and is axially pressed against an impressed surface to cause gradual and continuous cleavage of the rod into three branched portions, which are forced into three chambers arranged and shaped like three petal-like arms of the desired tulip-shaped metal part. The branched portions of the metal material are extruded within the three chambers in directions parallel to the direction of the pressing force exerted on the metal rod, with continued application of a back pressure in opposition to the extruded portions of the metal material to shape the ends of the petal-like arms during the extrusion process.
REFERENCES:
patent: 3893325 (1975-07-01), Soto
patent: 3974677 (1976-08-01), Castellani
patent: 4094183 (1978-06-01), Meltler
patent: 4287747 (1981-09-01), Koshimara
Ishii Shoju
Koshimaru Hajime
Gilden Leon
Nissan Motor Co,. Ltd.
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