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1. (WO2001036121) METHOD FOR FORMING AN INITIAL PROFILE OR A TOOL OF THE KIND AND A PROFILE THEREFOR

Pub. No.:    WO/2001/036121    International Application No.:    PCT/CH2000/000594
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Thu Nov 09 00:59:59 CET 2000
IPC: B21D 26/033
B21D 7/00
Applicants: ALCAN TECHNOLOGY & MANAGEMENT LTD.
LEPPIN, Christian
GEHRIG, Markus
Inventors: LEPPIN, Christian
GEHRIG, Markus
Title: METHOD FOR FORMING AN INITIAL PROFILE OR A TOOL OF THE KIND AND A PROFILE THEREFOR
Abstract:
The invention relates to a method for forming an initial profile (10, 10x, 15, 16) or a tool of the kind that is provided with a profile chamber, by means of inner high pressure in such a way that an end profile is formed, whereby said pressure is generated in the sealed profile chamber by an active means that can flow. Said method is especially used for forming until the end profile rests on the wall of the forming chamber. Before forming by means of inner high pressure, the initial profile is formed at a distance to the free ends thereof and crosswise in relation to the longitudinal axis thereof to reach a cross-section with advantageous bending properties. The middle line of the component is formed and the cross-section thereof is deformed by means of inner high pressure during bending.