| 摘要 |
The present invention relates to a method and process for manufacturing an improved machine tool collet. The invention further relates to an improved machine tool collet having design parameters optimized to maximize the gripping strength of the collet. The collet according to the invention is of the type having a plurality of gripping jaws spaced around a common longitudinal axis with resilient material between the gripping jaws. The method includes calculating the total torque generated on a bar passing through the collet for a given collet configuration having predetermined design parameters. The total torque includes the torque generated just prior to a toggle condition occurring between the gripping jaws and the bar and the maximum moment force generated between the gripping jaws and the bar at a toggle condition. At least one of the design parameters of the collet, 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. In this manner, at least one design parameter can be varied and optimized for maximizing the gripping strength of the collet. |
