B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
B23B 31/20 (2006.01) G06F 15/60 (1990.01)
Patent
CA 2122155
2122155 9405453 PCTABS00030 A method (70) for manufacturing a machine tool collet (10) and a machine tool collet (10) having design parameters optimized to maximize its gripping strength. The collet (10) is of the type having a plurality of gripping jaws (16) spaced around a longitudinal axis (18) with resilient material between the jaws (16). The method (70) includes calculating the total torque generated on a bar passing through the collet (10) for a given collet configuration, including the torque generated just prior to a toggle condition occurring between the jaws (16) and the bar and the maximum moment force generated at a toggle condition. At least one of the design parameters of the collet (10), such as jaw thickness or number of jaws, is varied and the total torque generated is recalculated until the total torque reaches a maximum value for the given collet configuration.
Power Tool Holders Incorporated
Riches Mckenzie & Herbert Llp
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