EP 0700323 B1 19970212 - RADIAL EXTRUSION PROCESS COMBINED WITH INSIDE TUBE IRONING
Title (en)
RADIAL EXTRUSION PROCESS COMBINED WITH INSIDE TUBE IRONING
Title (de)
RADIAL-EXTRUSIONSVERFAHREN KOMBINIERT MIT INNEREM GLATTZIEHEN DES ROHRES
Title (fr)
PROCEDE D'EXTRUSION RADIALE COMBINE AVEC L'ETIRAGE DE TUBE INTERIEUR
Publication
Application
Priority
- SI 9400007 W 19940516
- SI 9300258 A 19930517
Abstract (en)
[origin: WO9426437A2] A subject of the invention is the radial extrusion process combined with inside tube ironing, which is an essence a cold extrusion process and can be reckoned among bulk metal forming processes. It enables tube shaped metal semiproducts to be formed into different final shaped parts or parts that are intended for additional working, for example by machining. The process is grounded on insertion of a tube (1), which may be on one end previously expanded, into a proper shaped die (3), where on one side there is a punch (4) which is retained with a determined force (F1) and inside which lies a free movable mandrel (5), while from the other side in working stroke the counter-punch (2) extrudes the difference of tube volume which results from ironing of the tube (1), in the direction of counter-punch (2) travel so, that the material fills up the starting clearance between the mandrel (5) and the tube (1), the space between the tube (1) and the punch (2) and arbitrary shaped space (B) in the punch (2) or in the die (3).
IPC 1-7
IPC 8 full level
B21K 21/12 (2006.01); B21C 23/20 (2006.01); B21D 22/00 (2006.01); B21D 41/00 (2006.01); B21K 21/00 (2006.01); B21K 21/08 (2006.01); B21K 21/16 (2006.01)
CPC (source: EP)
B21C 23/20 (2013.01); B21K 21/00 (2013.01); B21K 21/08 (2013.01); B21K 21/16 (2013.01)
Designated contracting state (EPC)
DE DK ES FR GB IT SE
DOCDB simple family (publication)
WO 9426437 A2 19941124; WO 9426437 A3 19950119; DE 4342562 A1 19941124; DE 69401752 D1 19970327; DE 69401752 T2 19970605; DK 0700323 T3 19970728; EP 0700323 A1 19960313; EP 0700323 B1 19970212; ES 2100068 T3 19970601; JP H08510960 A 19961119; RU 2116861 C1 19980810; SI 9300258 A 19950228
DOCDB simple family (application)
SI 9400007 W 19940516; DE 4342562 A 19931214; DE 69401752 T 19940516; DK 94916475 T 19940516; EP 94916475 A 19940516; ES 94916475 T 19940516; JP 52534694 A 19940516; RU 95122237 A 19940516; SI 9300258 A 19930517