Tube drawing method and device

Details Tube drawing method and device Tube drawing method and device

2005-01-04

2005-01-04

Crane, Daniel C. (Department: 3725)

Metal deforming

By pulling workpiece through closed periphery die

Utilizing plural metal-deforming tools

C072S284000

Reexamination Certificate

active

06837091

ABSTRACT:
A method of elongating a tube (10) by way of a drawing ring (13), wherein, when elongating the tube (10), tensile forces are applied to an elongated tube portion (22) which has already passed through the effective drawing ring cross-section and that pressure forces are applied to a tube blank portion (11) which has not yet passed through the effective drawing ring cross-section, wherein the tensile forces are applied by a mandrel (16) which is positioned in the tube and which is connected to a front tube end in a form-fitting or force-locking way.

REFERENCES:
patent: 441927 (1890-12-01), Bray
patent: 2270398 (1942-01-01), Westin
patent: 2597500 (1952-05-01), Kerr
patent: 2886170 (1959-05-01), Kerr
patent: 5487292 (1996-01-01), Fox
patent: 573431 (1959-04-01), None
patent: 2218667 (1973-04-01), None
patent: 34 37 123 (1986-08-01), None
patent: 35 06 220 (1992-12-01), None
patent: 835555 (1981-06-01), None

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