Extrusion punch

Details Extrusion punch Extrusion punch

1978-12-04

1981-06-02

Larson, Lowell A.

Metal deforming

By extruding through orifice

Utilizing internal forming means

72273, B21C 2600, B21C 2318

Patent

active

042703786

ABSTRACT:
An extrusion punch, especially for use in a back extrusion process, wherein a hard wear resistant material is joined on one end to a steel punch body. The hard wear resistant material is joined on at the tip of a steel body so as to prevent wear due to abrasion on the punch caused by the material being extruded in a die means. The hard wear resistant end cap on the tip of the steel body is joined so that it may easily and quickly be replaced when the punch is in position on the machine thereby providing less down time for maintenance on the extrusion press. The method of joining the hard wear resistant end cap to the steel body minimizes the conditions which tend to fracture hard wear resistant material.

REFERENCES:
patent: 781422 (1905-01-01), Hayden et al.
patent: 1802843 (1931-04-01), Singer
patent: 2955847 (1960-10-01), McKenna
patent: 3677060 (1972-07-01), Loqvist
Designing with Kennametal (1967) by Kennametal Inc., pp. 1-47.
"Tool Design Tips for Cold Extrusion", Machinery, May 1968, pp. 104-110.

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