Process for manufacturing hollow bodies

Details Process for manufacturing hollow bodies Process for manufacturing hollow bodies

1997-09-09

1999-02-09

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 62, 72 56, B21D 2602

Patent

active

058680233

ABSTRACT:
Hollow bodies such as construction elements for vehicle manufacture can be produced by forming a preform in the form of a longitudinal body or sheets of aluminum or its alloys by means of a high internal pressure process or by superplastic forming in a tool. In this process the preform is heat treated locally before forming, on places of high elongation during the forming process and/or the tool for the forming process is equipped with local surface characteristics of different friction such as roughness patterns or with smoothed surfaces.

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patent: 5671629 (1997-09-01), Valyi
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Metals handbook, 8th edition, vol. 1, Properties and Selection of Metals, Feb. 1966, p. 865.
Patent Abstracts of Japan, vol. 016, No. 507 (M-1327), Oct. 20, 1992.
Patent Abstracts of Japan, vol. 016, No. 449 (C-0986), Sep. 18, 1992.
Patent Abstracts of Japan, vol. 016, No. 467 (M-1317), Sep. 29, 1992.

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