Tool for cold forging tubular members

Details Tool for cold forging tubular members Tool for cold forging tubular members

1987-10-28

1988-12-20

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 58, 294211, B23D 1700

Patent

active

047917962

ABSTRACT:
An improved cold forging tool to exert radial forces outwardly to form a tubular member outwardly into an annular member which includes a central body having external recesses and external shoulders at each end, a resilient sleeve surrounding said central body and having its ends positioned within said external recesses, a passage through the central body to communicate between a pressure supply line connected to the end of the body and the interior of said resilient sleeve, and first and second dual segmented, expandable anti-extrusion ring positioned between the central expansion portion of said resilient sleeve and each of said shoulders, a resilient ring retaining each of said segmented rings in surrounding relationship to the ends of said resilient sleeve to prevent extrusion of the resilient sleeve during the forming of the tubular member and a shoulder on said body limiting the radial outward movement of the rings abutting the external body shoulders.

REFERENCES:
patent: 2997093 (1961-08-01), Harris
patent: 3343916 (1969-03-01), Fisher et al.
patent: 4330144 (1982-05-01), Ridenour
patent: 4382373 (1983-05-01), Pettersson
patent: 4388752 (1983-06-01), Vinciguerra et al.
patent: 4608739 (1986-09-01), Miller
patent: 4662663 (1987-05-01), Schmitz
patent: 4724693 (1986-02-01), Tedder

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