Extrusion punch and method of construction

Details Extrusion punch and method of construction Extrusion punch and method of construction

1980-09-03

1983-01-18

Larson, Lowell A.

Metal deforming

By extruding through orifice

Indirect extrusion

72267, 72479, 403381, 403273, 403299, 29447, B21C 2318, B21C

Patent

active

043686346

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: 1989948 (1935-02-01), Singer
patent: 2955847 (1960-10-01), McKenna
patent: 3514140 (1970-05-01), Ely et al.
patent: 3552173 (1971-01-01), Biginelli
patent: 3561242 (1971-02-01), Biginelli
patent: 3677060 (1972-07-01), Loquist
patent: 3698749 (1972-10-01), Yonkers
Machinery (May 1968) pp. 104-110, "Tool Design Tips for Cold Extrusion", Designing with kennametals, (1967) by Kennametal Inc.

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