Global Patent Index - EP 1054744 A1

EP 1054744 A1 20001129 - 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

EP 1054744 A1 20001129 (DE)

Application

EP 99906169 A 19990120

Priority

  • DE 19805172 A 19980210
  • EP 9900340 W 19990120

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

B21D 26/06; B21D 26/02

IPC 8 full level

B21D 26/02 (2011.01); B21D 26/06 (2006.01)

CPC (source: EP)

B21D 26/037 (2013.01); B21D 26/041 (2013.01); B21D 26/06 (2013.01)

Designated contracting state (EPC)

AT DE ES FR GB IT SE

DOCDB simple family (publication)

DE 19805172 A1 19990819; DE 19805172 C2 20010607; AT 220580 T 20020815; BR 9907797 A 20001017; CA 2320096 A1 19990819; DE 59902034 D1 20020822; 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

DOCDB simple family (application)

DE 19805172 A 19980210; AT 99906169 T 19990120; BR 9907797 A 19990120; CA 2320096 A 19990120; DE 59902034 T 19990120; EP 9900340 W 19990120; EP 99906169 A 19990120; ES 99906169 T 19990120; HU 0101218 A 19990120; JP 2000531264 A 19990120; PL 34221999 A 19990120; US 60195400 A 20000928