DE3101123

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 a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HAJIME, KOSHIMARU, MACHIDA, JP, SHOJU, ISHII, TOKIO/TOKYO, JP
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL FORGE FURNACES FORGING HAMMERING MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING TRANSPORTING
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Beschreibung
Zusammenfassung:	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.