Computer-numerical-control compensation of a programmed tool path for precision grinding (nd) (Engineering Materials). [1 drawing]
A drawing is given of a device to compensate for errors in grinding wheel size and shape. A wheel-shape compensation technique was developed that utilizes a computer numerical control (CNC) system and an ultrasonic/acoustic wheel setter. The wheel setter consists of a steel ball that is acoustically coupled to a piezo-electric crystal via a support post. The ceramic crystal is split in half and connected differentially in series for use with a differential amplifier. The acoustic-emission-detector assembly and ball-support post are mounted in a yoke having high ultrasonic losses; which, in turn, reduces the coupling due to external shock and vibration, but provides a stable mounting medium for attaching the setter to the machine. When the rapidly rotating grinding wheel touches the wheel-setter ball, the induced vibration causes the ceramic crystal to send an electrical signal to the associated electronics, which tells the CNC that contact has occurred. This action allows the operator to use the wheel setter to determine the relative location of the grinding wheel on the machine and to properly position the grinding wheel in order to fabricate the desired part. The electronic system is described in engineering drawing given.
- Research Organization:
- Oak Ridge Y-12 Plant, TN (USA)
- OSTI ID:
- 7256957
- Report Number(s):
- CAPE-2560
- Resource Relation:
- Other Information: 1 drawing
- Country of Publication:
- United States
- Language:
- English
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