Guiding a mandrel or punch for piercing or cold-extrusion

Details Guiding a mandrel or punch for piercing or cold-extrusion Guiding a mandrel or punch for piercing or cold-extrusion

1981-06-01

1983-11-22

Larson, Lowell A.

Metal deforming

By extruding through orifice

Utilizing internal forming means

72272, 72273, B21C 2320, B21C 2600

Patent

active

044161395

ABSTRACT:
A piercing mandrel or punch, particularly for backward extrusion, is guided by a member which centers the mandrel or punch in the upper die cavity and is coupled thereto until abutting a centering shoulder in the die cavity; the guiding and centering function continues as the mandrel or punch begins and progresses in the cold flow-working process.

REFERENCES:
patent: 603787 (1898-05-01), Holinger
patent: 629817 (1899-08-01), Prym
patent: 1024840 (1912-04-01), Ehrhardt
patent: 2812673 (1957-11-01), Harter
patent: 3280613 (1966-10-01), Schrom
patent: 4362043 (1982-12-01), Hanson

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