EP 1598129 A1 20051123 - Hot forming system for metal workpieces
Title (en)
Hot forming system for metal workpieces
Title (de)
Warmverformungsverfahren für metallische Werkstücke
Title (fr)
Système de formage à chaud pour pièces métalliques
Publication
Application
Priority
EP 04011643 A 20040517
Abstract (en)
A device including at least one transformer (1) with primer (9) seconder (10) coil ratio more than one and including a control unit (2) used to control timing and magnetute of the primer current is employed to heat a metal workpiece (4) to be subjected a subsequent forming operation. An homopolar DC generator can also be used as current source for current heating preparing workpiece for forming operation. Subsequent heating, forming and cooling processes of the metal workpiece are carried out in a controlled manner by a central synchronization unit. This process can be applicated in hot metal bulk forging, sheet forming and hot tube blowforming.
IPC 1-7
B21J 9/08; B21J 13/10; B21D 37/16; B21D 26/02; B21D 22/02; H05B 3/00; B21D 43/05; B21D 43/10
IPC 8 full level
B21D 22/02 (2006.01); B21D 26/02 (2006.01); B21D 37/16 (2006.01); B21D 43/05 (2006.01); B21D 43/10 (2006.01); B21J 9/08 (2006.01); B21J 13/10 (2006.01); H05B 3/00 (2006.01)
CPC (source: EP)
B21J 9/08 (2013.01); B21J 13/10 (2013.01)
Citation (search report)
- [YDA] US 6463779 B1 20021015 - TERZIAKIN MEHMET [TR]
- [Y] FR 2607736 A1 19880610 - CEGEDUR [FR]
- [YD] US 5515705 A 19960514 - WELDON WILLIAM F [US], et al
Citation (examination)
GB 1008572 A 19651027 - HASENCLEVER AG MASCHF
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04011643 A 20040517