Global Patent Index - EP 0678351 B1

EP 0678351 B1 2000-02-16 - Method of producing a multi-belt pulley, form tool for carrying out the method and pulley thus obtained

Title (en)

Method of producing a multi-belt pulley, form tool for carrying out the method and pulley thus obtained

Title (de)

Verfahren zur Herstellung einer Mehrfachriemenscheibe, Formwerkzeug zur Durchführung des Verfahrens und so hergestellte Riemenscheibe

Title (fr)

Procédé de fabrication d'une poulie à gorges multiples, outil de formage mis en oeuvre par ce procédé et poulie ainsi obtenue

Publication

EP 0678351 B1 (FR)

Application

EP 95400617 A

Priority

FR 9403336 A

Abstract (en)

[origin: EP0678351A1] A tool (1) is claimed for mounting on a press and designed for forming a pulley blank (P) made up of a rim (J) completely cylindrical around a symmetrical axis (X) and a wheel disc (F). The tool comprises a punch (10) and a die bottom (20) able to be applied on the two opposite respective faces of the wheel disc. The punch has an outer radial surface (11) that is completely cylindrical around the symmetrical axis (X) situated at the inner radial side of the rim (J). An extraction ring (30) is mounted to slide on the punch (10), being able to come into contact with the free edge of the rim (J). A die (40) is mounted to slide on the die bottom (20) and has an inner radial surface (41) that is completely cylindrical around the symmetrical axis (X), able to cover the rim (J) and forming thus with the punch (10) an annular space with a width greater than the initial thickness of the rim (J). The method of using this tool in the fabrication of a multiple grooved pulley and the pulleys thus produced are also claimed. <IMAGE>

IPC 1-7 (main, further and additional classification)

B21D 37/08; B21D 53/26

IPC 8 full level (invention and additional information)

B21D 53/26 (2006.01)

CPC (invention and additional information)

B21D 53/261 (2013.01)

Designated contracting state (EPC)

BE DE ES FR GB IT

EPO simple patent family

EP 0678351 A1 19951025; EP 0678351 B1 20000216; DE 69515075 D1 20000323; DE 69515075 T2 20000914; ES 2143014 T3 20000501; FR 2717718 A1 19950929; FR 2717718 B1 19960628

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