Method of manufacturing extruded seamless hollow materials

Details Method of manufacturing extruded seamless hollow materials Method of manufacturing extruded seamless hollow materials

1989-10-17

1990-11-06

Spruill, Robert L.

Metal deforming

By extruding through orifice

Utilizing internal forming means

B21C 2308, B21C 2504

Patent

active

049675834

ABSTRACT:
A method of manufacturing extruded seamless hollow materials characterized in that, prior to extruding a hollow billet from container liner through extrusion dies, a process wherein a centering jig for holding the tip portion of mandrel at the center of extrusion is provided on the extruding side or in the extrusion dies on the extruding side of the container liner, a process wherein the tip portion of mandrel is inserted into the centering jig to be held and a process wherein the hollow billet is pressurized to fill up said billet in the container liner are included.

REFERENCES:
patent: 1400071 (1921-12-01), Jacobsen
patent: 2893553 (1959-07-01), Kreidler
patent: 3347079 (1967-10-01), Rowell
patent: 4104903 (1978-08-01), Rowell et al.
The Extrusion of Metals, by Pearson and Parkins (1960), pp. 85-88.
Assoc. of Light Metals ed., "Aluminum Handbook", 1st ed., pp. 461-462 (1963), Asakura Shoten.
Former Light Metal Rolling Committee of Industry and Aluminum Handbook Editorial Committee ed., "Aluminum Handbook".

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