Method of hydrostatic extrusion

Details Method of hydrostatic extrusion Method of hydrostatic extrusion

1976-02-12

1976-10-05

Lanham, C.W.

Metal deforming

With 'coating' of work

72 60, 72DIG31, B21B 4500

Patent

active

039837300

ABSTRACT:
A method of lubricating a metal billet during an extrusion process where at least two lubrication systems are used. Each of the lubrication systems has a different viscosity and the systems can be of the same material or two different material compositions. A solid-lubrication system immediately adjacent to the billet functions primarily as a die lubricant while a liquid-lubrication system immediately adjacent the container is pressurized by the advance of a sealed ram in contact with the billet. The liquid lubrication system forms a thin film of pressurized liquid lubricant adjacent the container wall and substantially reduces or virtually eliminates friction thereupon during extrusion of the billet under hydrostatic or quasi-hydrostatic conditions.

REFERENCES:
patent: 3072251 (1963-01-01), Sauve
patent: 3345842 (1967-10-01), Richards
patent: 3382691 (1968-05-01), Green
patent: 3451240 (1969-06-01), Sauve
patent: 3580019 (1971-05-01), Beresnev et al.
patent: 3677048 (1972-07-01), Fuchs, Jr.
Bulleid Memorial Lectures, 1965, vol. IIIB, "Recent Developments in Cold Forming," H. L. Pugh, pp. (3)29- 3(34).

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