Expanding collet assembly for pick-off spindle

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 31/40 (2006.01) B23B 15/00 (2006.01) B23Q 3/12 (2006.01)

Patent

CA 2496788

An expanding, inner diameter gripping collet assembly (10) for a pick-off spindle. An arbor base (18) is connected to the pick-off spindle (12) and is moveably connected to a moveable arbor (16). The moveable arbor (16) engages and is driven by the pick-off spindle nose (14). The moveable arbor (16) has motion-translating cam surfaces (65) on one end that engage corresponding surfaces on one end of an expanding collet (26). A drawplug (20) having motion- translating cam surfaces (70) that engage corresponding ones (68) on the other end of an expanding collet (26) is inserted through the moveable arbor (16) and secured into the arbor base (18). The collet assembly (10) also includes an ejector housing (22), in which an ejector (24) is positioned for sliding movement. A compression spring (60) biases the ejector (24) forwardly.

L'invention concerne un ensemble pince expansible (10) de saisie de diamètre interne pour broche amovible. La base (18) d'une tige est connectée à la broche amovible (12), et peut être connectée de manière amovible à une tige amovible (16). La tige amovible (16) vient en contact avec et est entraînée par l'extrémité (14) de la broche amovible (14). La broche amovible (16) comprend à une extrémité des surfaces (65) de came de translation qui viennent en contact avec des surfaces correspondantes à une extrémité d'une pince expansible (26). Une cheville (20) comprenant des surfaces (70) de came de translation venant en contact avec des surfaces correspondantes (68) à l'autre extrémité d'une pince expansible (26) est insérée dans la tige amovible (16) et fixée dans la base (18) de la tige. L'ensemble pince (10) comprend également un logement (22) d'éjecteur, dans lequel est positionné un éjecteur (24) de manière à effectuer un mouvement de glissement. Un ressort (60) de compression polarise l'éjecteur (24) vers l'avant.

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