Transducer calibration verification fixture for multiple spindle torque units

摘要

A transducer calibrating and testing assembly is provided for calibrating the spindle transducers in a multiple spindle machine tool without the need for completely dismantling the machine to perform the calibration operation. The transducer calibrating and testing assembly includes support housing means, and torque applying means, including a test bolt and nut, for applying a known torque to the spindle as measured by a master transducer. The torque applying means is supported by and contained substantially entirely within the support housing means. Torque releaser means for manually or automatically releasing the torque applied by the torque applying means to enable the serial performance of several calibration tests is also provided. The support housing means of the present testing assembly engages the stationary housing portion of the machine spindle, and the torque applying means is driven by the machine spindle drive to apply and maintain the desired torque, which is measured by a master transducer and indicated on a readout display. A separate readout display permits comparison of the torque output of the spindle torque transducers with that of the master transducer so that the accuracy of the spindle transducer can be ascertained.