EP 0003773 A1 19790905 - Process and apparatus for the cold extrusion of metal bushings, in particular, for tracks of track-laying tractors and the like.
Title (en)
Process and apparatus for the cold extrusion of metal bushings, in particular, for tracks of track-laying tractors and the like.
Title (de)
Verfahren und Vorrichtung zum Kaltfliesspressen von Metallbuchsen, insbesondere für Raupenketten von Raupenfahrzeugen.
Title (fr)
Procédé et dispositif pour l'extrusion à froid de coussinets métalliques, notamment pour chaînes de véhicules à chenilles.
Publication
Application
Priority
IT 4809478 A 19780217
Abstract (en)
Process and apparatus for the cold extrusion of bushings (2) from cylindrical metal pieces or slabs, carried out by means of a single extrusion step, performed into an apparatus comprising a press body with a reciprocating punch (4), cooperating with a coaxial press die (8), including a coaxial seat adapted to receive the metal slab to be transformed in a bushing as well as a upper sleeve (6), slidably mounted about said punch and acting as guiding means for correctly centering said punch with regard of said piece during the extrusion step.
IPC 1-7
IPC 8 full level
B21C 23/03 (2006.01); B21C 23/20 (2006.01); B21K 1/02 (2006.01)
CPC (source: EP)
B21C 23/03 (2013.01); B21C 23/20 (2013.01); B21K 1/02 (2013.01)
Citation (search report)
- DE 755107 C 19530316 - RHEINMETALL BORSIG AG
- GB 836706 A 19600609 - KABEL UND METALLWERKE NEUMEYER
- GB 1207407 A 19700930 - CHESTERFIELD TUBE COMPANY LTD
- FR 1573668 A 19690704
- METALWORKING PROD., Jan. 17th 1958 London, J. VERSON: "Practical tooling for could extrusion", pages 105-113. * Page 110; figure 1, page 111; figure 4, page 113 *
Designated contracting state (EPC)
BE CH DE FR GB LU NL SE
DOCDB simple family (publication)
EP 0003773 A1 19790905; IT 1155833 B 19870128; IT 7848094 A0 19780217
DOCDB simple family (application)
EP 79100356 A 19790208; IT 4809478 A 19780217