TRACEABILITY OF THREAD RING CALIBRATION ON A CO-ORDINATE MEASURING MACHINE |
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| A. Sostar, B. Acko |
- Abstract:
- Thread rings are widely used for screw thread gauging. They can be calibrated on 1D measurement machines with ball probes, by using control thread plug gauges, or on three co-ordinate measurement machines (CMMs) by using special probes and software. The last method is used in our laboratory for calibrating rings from 5 to 300 mm. The calibration procedure based on this method was accredited by RvA which is EAL member and signatory or MRA. The basic problem by creating the procedure was traceability of the CMM measurement. Since the CMM is used as a calibration device in this case, simple periodical performance tests are not sufficient for assuring traceability at a certain level of uncertainty. Therefore, a special substitution method was involved. Reference standards in the substitution procedure are gauge rings, which are calibrated on 1D measurement instrument by using laser interferometer as the linear measurement system. Reference values are set by combination of gauge blocks. Basic approaches are presented in the paper.
- Keywords:
- traceability, calibration, screw thread ring
- Download:
- IMEKO-WC-2000-TC8-P227.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000