Extrusion press for extruding tubes

Details Extrusion press for extruding tubes Extrusion press for extruding tubes

1978-02-02

1980-06-10

Crane, Daniel C.

Metal deforming

By extruding through orifice

Utilizing internal forming means

72253R, B21C 2300, B21C 2310

Patent

active

042066263

ABSTRACT:
In tube extrusion presses, there are two steps in production. Firstly, a mandrel pierces a hole through the center of a billet, the tip of the mandrel ending up just within the opening of the extrusion die. Secondly, the now hollow cylindrical billet is extruded through the die and over and around the tip of the mandrel to produce a tube. To limit the movement of the mandrel, stroke-limiting rods are provided which pass through bores in a part attached to the mandrel and in a fixed part of the press. The rods can be held fast in one or both of these bores, or released to slide through them, depending on the stage reached in the extrusion process.

REFERENCES:
patent: 2063563 (1936-12-01), Sparks
patent: 2672234 (1954-03-01), Lorant
patent: 2903130 (1959-09-01), Reichl
patent: 3391566 (1968-07-01), Linnerz et al.
patent: 3468152 (1969-09-01), Croseck et al.
patent: 3651680 (1972-03-01), Groos
patent: 3664168 (1972-05-01), Shtin
patent: 3675457 (1972-07-01), Groos
patent: 3709013 (1973-01-01), Petsch
patent: 4050281 (1977-09-01), Sibler

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