Improved collet and method for optimizing gripping action...

B - Operations – Transporting – 23 – B

Patent

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B23B 3/20 (2006.01) B23B 31/20 (2006.01)

Patent

CA 2157284

The present invention relates to a method and process for manufacturing an improved machine tool collet (10). The invention further relates to an improved machine tool collet (10) having design parameters optimized to maximize the gripping strength of the collet (10). The collet (10) is of the type having a plurality of gripping jaws (16) spaced around a common longitudinal axis (18) with resilient material (12) between the gripping jaws (16). The method includes calculating the total torque (TN) generated on a bar passing through the collet (10) for a given collet configuration having predetermined design parameters. At least one of the design parameters of the collet (10) is varied and the total torque (TN) generated is recalculated until the total torque (TN) reaches a maximum value for the given collet configuration. In this manner, at least one design parameter can be varied and optimized for maximizing the gripping strength of the collet (10).

La présente invention concerne un procédé de fabrication d'une pince de serrage améliorée (10) de machine outil ainsi que la pince de serrage améliorée (10) de machine outil dont les paramètres de conception ont été optimisés pour une force de serrage maximale de la pince de serrage (10). Cette dernière (10) comporte un certain nombre de mâchoires de serrage (16) espacées autour d'un axe longitudinal commun (18), et un matériau élastique (12) situé entre les mâchoires de serrage (16). Le procédé nécessite le calcul du couple total (TN) développé sur une barre passant au travers de la pince de serrage (10) selon, d'une part, une configuration spécifique de la pince de serrage, et d'autre part, des paramètres de conception prédéterminés. Au moins un des paramètres de conception de la pince de serrage (10) est soumis à variation, et le couple total (TN) ainsi développé étant recalculé jusqu'à atteindre un maximum pour la configuration concernée de la pince de serrage. Ce procédé permet donc de faire varier au moins un des paramètres de conception et de l'optimiser pour aboutir à une force de serrage maximale de la pince de serrage (10).

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