Method for producing aluminum drums having highly smooth surface

Details Method for producing aluminum drums having highly smooth surface Method for producing aluminum drums having highly smooth surface

1988-01-27

1989-02-21

Crane, Daniel C.

Metal deforming

By pulling workpiece through closed periphery die

Utilizing plural metal-deforming tools

B21C 124

Patent

active

048054356

ABSTRACT:
A method for producing aluminum drums having highly smooth surfaces, the method including two steps; the preparation of an aluminum pipe by extrusion, and the drawing of the pipe through a die unit, wherein the die unit comprises a die and a plug, the die having an approach angle of 45.degree. to 75.degree. C. and the plug having an approach angle of 10.degree. to 20.degree..

REFERENCES:
patent: 2355734 (1944-08-01), Katz
patent: 3798943 (1974-03-01), Benteler et al.
patent: 3847001 (1974-11-01), Thamasett
patent: 4161112 (1979-07-01), Stump

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