Method of making profiled work of aluminum or aluminum alloy by

Details Method of making profiled work of aluminum or aluminum alloy by Method of making profiled work of aluminum or aluminum alloy by

1977-04-21

1978-09-26

Lanham, C.W.

Metal deforming

With cleaning, descaling, or lubrication of work or product

Mechanical cleaning

72253R, B21C 2332, B21C 3506

Patent

active

041160304

ABSTRACT:
The method of making a profiled work of aluminum or aluminum alloy comprises the steps of loading a billet of aluminum or aluminum alloy in a container having an extruding die at its one end and urging the billet against the extruding die by a ram so as to extrude the billet through the die to form a profiled work of aluminum or aluminum alloy with its cross-section conforming with that of the die. A disc of aluminum or aluminum base alloy containing at least one or two elements selected from the group consisting of elements B, Be, Ti, Zr, W, Mo and V is located between the extruding die and the billet before the billet is extruded. The element contained in the disc forms very hard and fine abrasive particles and the abrasive particles are extruded together with the mass of the billet through the extruding die so that the material of the billet sticking to the bearing surface of the extruding die is removed from the bearing surface and the bearing surface is polished so as to prevent the material of the billet from further sticking to the bearing surface thereby permitting the extruding velocity to be raised without causing any surface defects such as flaws, die-lines, pick-up and scores, while the brilliance of the surface of the extruded profiled work is raised and no local decolorization in the surface occurs after anodic oxidation treatment of the profiled work.

REFERENCES:
patent: 2047237 (1936-07-01), Updegraff
patent: 2135193 (1938-11-01), Moorhead
patent: 2971644 (1961-02-01), Sejournet
patent: 3919870 (1975-11-01), Wassen

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