EP 2004341 B1 20140101 - METHOD FOR THE PRECISION EXTRUSION OF HOLLOW METAL COMPONENTS AND ASSOCIATED DEVICE
Title (en)
METHOD FOR THE PRECISION EXTRUSION OF HOLLOW METAL COMPONENTS AND ASSOCIATED DEVICE
Title (de)
VERFAHREN ZUM PRÄZISIONS-EXTRUDIEREN VON HOHLKOMPONENTEN AUS METALL UND ENTSPRECHENDE VORRICHTUNG
Title (fr)
PROCEDE D EXTRUSION DE PRECISION DE PIECES METALLIQUES CREUSES ET DISPOSITIF ASSOCIE
Publication
Application
Priority
- FR 2007000609 W 20070411
- FR 0651326 A 20060411
Abstract (en)
[origin: WO2007116151A1] The invention relates to a method for producing a hollow metal component by extrusion, in which method the deformation of a forged blank (60a) housed in a base (10) and resting on a bottom (50) is obtained by embedding a punch (16) in said forged blank (60) in the direction of extrusion (C) and drawing metal (60b) around this punch (16). This method is essentially characterized in that, at the same time as the punch (16) is embedded in the forged blank (50) in its outward stroke in the direction of extrusion (C), a compensating back-pressure (P) is applied to this material (60b) in the opposite direction (D), this compensating back-pressure (P) being adjusted both to create a back-pressure that will allow the material to be drawn around the punch (16) and to control the movement of material (60b) in the base (10) by compensating for the force involved in extruding the metal component (60b). The invention also relates to a device for implementing such a method.
IPC 8 full level
B21C 23/20 (2006.01)
CPC (source: EP)
B21C 23/205 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
FR 2899499 A1 20071012; FR 2899499 B1 20090227; EP 2004341 A1 20081224; EP 2004341 B1 20140101; ES 2451654 T3 20140328; WO 2007116151 A1 20071018
DOCDB simple family (application)
FR 0651326 A 20060411; EP 07731277 A 20070411; ES 07731277 T 20070411; FR 2007000609 W 20070411