EP 1063029 B1 20041110 - Method for hydroforming a hollow workpiece
Title (en)
Method for hydroforming a hollow workpiece
Title (de)
Verfahren zum Innendruckformen eines hohlen metallischen Werkstücks
Title (fr)
Procédé d'hydroformage d'une pièce creuse
Publication
Application
Priority
- DE 19928873 A 19990624
- US 65134900 A 20000829
Abstract (en)
[origin: EP1063029A1] A hollow metallic component (2) e.g. of aluminum, with an open end (17) is placed into a pre-heated open tool (1), parts of closing mandrels (10,11) forming closing cylinders (8,9) are fitted sealed into the component ends, and the tool is closed. A heated pressure fluid (14), e.g. air or nitrogen, is introduced via a mandrel into the component, which is now heated and plastified. The pressure fluid presses the component material into a forming nest (5) in the tool. Forming is carried out at temperatures of between 200oC and 400oC, and a pressure of between 150 and 500 bar.
IPC 1-7
IPC 8 full level
B21D 26/041 (2011.01)
CPC (source: EP US)
B21D 26/041 (2013.01 - EP US); B21D 37/16 (2013.01 - EP US); Y10T 29/49805 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1063029 A1 20001227; EP 1063029 B1 20041110; DE 19928873 A1 20010104; DE 19928873 B4 20040812; US 6349583 B1 20020226
DOCDB simple family (application)
EP 00109465 A 20000504; DE 19928873 A 19990624; US 65134900 A 20000829