The deviations b of the measurement results from the

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Unformatted text preview: asurement strategy, evaluation criteria and environmental conditions, are explicitly pointed out, thus become transparent and can be subsequently assessed in regard to their correlations. This is the basis to reduce the measurement uncertainty by decreasing the several influences’ effect systematically. Monitoring Coordinate Measuring Machines 4. MONITORING OF CMMS WITH CAR PARTS 131 In order to verify the above mentioned procedure a horizontal-arm CMM for measuring car sheet metal parts in series production of a German automotive company has been monitored. As representative part a shaft collet has been selected. The working standard was calibrated at the reference CMM of the measurement centre of the Chair Quality Management and Manufacturing Metrology (QFM). 4.1. Calibration of a shaft collet The measurement centre of QFM is accredited by PTB1 as DKD2-calibration laboratory (DKD-K-36501) for DKD-calibration of standard geometrical features on prismatic workpieces according to ISO 17025. The measuring room (Class 1 acc. guideline VDI/VDE 2627) has almost perfect environmental conditions, e.g. a temperature stability of 20 °C ± 0.1 °C all over the year. According...
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