Metal deforming – Process – Tube making or reshaping
Patent
1974-10-04
1976-04-20
Lanham, C. W.
Metal deforming
Process
Tube making or reshaping
72 60, 72264, 72265, B21B 1702
Patent
active
039509796
ABSTRACT:
A chamber having a first end and a second end and receiving a billet having an aperture therethrough slidably receives through the first end a die. A mandrel slidably extends through the second end of the chamber into the aperture of the billet and has a conical section extending into the zone of deformation of the die. Hydraulic cylinders having piston rods operatively associated with the die and the mandrel advance the die into the chamber through the first end thereof against the billet end, and simultaneously and at the same velocity retract the mandrel from the second end of the chamber, the zone of deformation of the die and the conical section of the mandrel defining a converging annular passageway through which the billet is extruded to produce tubing. Another set of hydraulic cylinders is operatively interposed between the die and the mandrel to compensate for forces tending to separate the die and mandrel during extrusion of the billet therethrough, whereby to maintain the positions of the die and mandrel relative to each other fixed and thus to maintain constant the geometry of the annular passageway.
REFERENCES:
patent: 2063563 (1936-12-01), Sparks
patent: 3454495 (1969-07-01), Schneider
patent: 3526119 (1970-09-01), Wasser
patent: 3677048 (1972-07-01), Fuchs
patent: 3807032 (1974-04-01), Nilsson
patent: 3808860 (1974-05-01), Yamaguchi et al.
Duzan James R.
Kelley D. P.
Lanham C. W.
Rosen A. S.
Western Electric Company Inc.
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