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Valutazione dell'incertezza nelle misure ottenute con Macchine di Misura a Coordinate (CMM) - note pratiche
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Gauge blocks measurements by mechanical comparison: aspects of the uncertainty budget through the analysis of an interlaboratory comparison
No full textIl design of experiment (DOE) come strumento per la valutazione della variabilità sperimentale con macchine di misura a coordinate (CMM): un’applicazione industriale
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Management Uncertainty analysis of point by point sampling complex surfaces using touch probe CMMs
No full textThe paper describes a study concerning point by point scanning of complex surfaces using tactile CMMs. A four factors-two level full factorial experiment was carried out, involving measurements on a complex surface configuration item comprising a sphere, a cylinder and a cone, combined in a single assembly. An investigation on the source and effects of different uncertainty contributors during this complex surface measurement was carried out. The factors involved are machine, probe, and operator, as well as procedure, dependant. The results obtained from the experiments were analysed in terms of deviations from CAD model, repeatability, and measuring uncertainty. Statistical analysis and uncertainty budget are presented
Optimization of a complex surface measurement with touch probe CMM using the design of experiments
No full textFactors affecting measurement uncertainty in industrial CMM work
No full textAn investigation is described, aimed at estimating effects of several factors on measurement uncertainty within an industrial environment. The case study concerns mainly tolerance verification on a coordinate measuring machine (CMM) of a rather complex part. Obtained results highlight the importance of probe qualification in the case at hand, and show how substantial savings in cycle time may be obtained
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