EP 1054744 A1 2000-11-29 - METHOD AND DEVICE FOR FORMING A WORKPIECE BY APPLICATION OF A HIGH INTERNAL PRESSURE
Title (en)
METHOD AND DEVICE FOR FORMING A WORKPIECE BY APPLICATION OF A HIGH INTERNAL PRESSURE
Title (de)
VERFAHREN UND VORRICHTUNG ZUM INNENHOCHDRUCK-UMFORMEN EINES WERKSTÜCKES
Title (fr)
PROCEDE ET DISPOSITIF POUR FORMER UNE PIECE PAR APPLICATION D'UNE PRESSION INTERIEURE ELEVEE
Publication
Application
Priority
- DE 19805172 A
- EP 9900340 W
Abstract (en)
[origin: DE19805172A1] The invention relates to a method and a device (1) for forming a workpiece (2) by application of a high internal pressure in a closed high-pressure forming tool (3). The workpiece is expanded by the fluidic high internal pressure created by a pressure generator and contacts the impression (9) of the forming tool (3). To improve process reliability during the forming of workpieces by application of a high internal pressure the invention provides for the high internal pressure to be applied in the form of a pressure pulsation.
IPC 1-7 (main, further and additional classification)
IPC 8 full level (invention and additional information)
B21D 26/02 (2011.01); B21D 26/06 (2006.01)
CPC (invention and additional information)
B21D 26/037 (2013.01); B21D 26/041 (2013.01); B21D 26/06 (2013.01)
Citation (search report)
See references of WO 9941028A1
Designated contracting state (EPC)
AT DE ES FR GB IT SE
EPO simple patent family
DE 19805172 A1 19990819; DE 19805172 C2 20010607; AT 220580 T 20020815; BR 9907797 A 20001017; CA 2320096 A1 19990819; EP 1054744 A1 20001129; EP 1054744 B1 20020717; ES 2178874 T3 20030101; HU 0101218 A2 20010828; HU 0101218 A3 20010928; JP 2002502706 A 20020129; PL 342219 A1 20010521; US 6282934 B1 20010904; WO 9941028 A1 19990819
INPADOC legal status
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2003-07-09 [26N] NO OPPOSITION FILED
- Effective date: 20030422
2003-01-01 [REG ES FG2A] DEFINITIVE PROTECTION
- Document: ES 2178874 T3
2002-12-13 [ET] FR: TRANSLATION FILED
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