Clamping device

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 17/26 (2006.01) B29C 45/66 (2006.01) B29C 45/67 (2006.01) B21D 26/02 (2006.01)

Patent

CA 2490719

The invention relates to a locking device for a device used for producing metal pieces that are transformed in a closed form tool. Said locking device at least comprises: - several tensioning loops (2), each of which is provided with at least one traction frame (2.2) that has a closed contour and encompasses two facing, spaced-apart segments (2.3) between which a form tool (12) can be disposed, each of said segments (2.3) having at least one contact surface (2.1) or a contact surface (2.4) and the tensioning loops (2) being pivotably fixed to a joint (8); - a contact surface (3.1) which is located above the form tool (12) or on the surface thereof and is used as a support for a contact surface (2.1) of a tensioning loop (2); and - a device (5) which generates a locking force of more than 3 MN and is provided with several force- generating elements.

L'invention concerne un dispositif de maintien en position fermée conçu pour un dispositif de production de pièces métalliques par formage au moyen d'un outil de formage fermé. Ledit dispositif de maintien en position fermée comprend au moins : plusieurs étriers de traction (2) qui comportent respectivement au moins un cadre de traction (2.2) présentant un contour fermé et comprenant deux segments (2.3) qui sont espacés l'un de l'autre et disposés l'un en face de l'autre, entre lesquels un outil de formage (12) peut être disposé et qui présentent respectivement au moins une surface d'appui (2.1) ou une autre surface d'appui (2.4), lesdits étriers de traction (2) étant respectivement fixés de manière pivotante sur au moins une articulation (8) ; une surface d'appui (3.1) située au-dessus de l'outil de formage (12) ou sur la surface de ce dernier et servant de support pour une surface d'appui (2.1) d'un étrier de traction (2) ; ainsi qu'un dispositif (5) destiné à générer une force de maintien en position fermée supérieure à 3MN et comprenant plusieurs éléments générateurs de forces.

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