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Inspecting geometric tolerances: Uncertainty analysis in position tolerances control on Coordinate Measuring Machines

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Abstract

Conformance to a specified part geometry is key to achieve product quality. Geometric tolerance control on Coordinate Measuring Machines is a critical issue as parsimony in the set of probed points dictated by economic considerations conflicts with the requirement of full field inspection mandated by tolerance standards. Evaluation of uncertainty originated by sampling errors takes therefore a high priority level. The case of position tolerance control on a hole axis and related uncertainty analysis is examined in the paper via Monte Carlo simulation. Results exhibit a remarkable uncertainty related to a number of steps involved in the control method. A comprehensive statistical analysis is shown to be required if risk of failure to reach the correct decision in assessing part conformance is to be kept under control.

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Authors and Affiliations

  1. Dipartimento di Ingegneria Meccanica, Università di Cagliari, Piazza d'Armi, 09100, Cagliari, Italy

    Daniele Romano

  2. Dipartimento di Matematica, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy

    Grazia Vicario

Authors
  1. Daniele Romano
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  2. Grazia Vicario
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Romano, D., Vicario, G. Inspecting geometric tolerances: Uncertainty analysis in position tolerances control on Coordinate Measuring Machines. Statistical Methods & Applications 11, 83–94 (2002). https://doi.org/10.1007/BF02511447

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  • DOI: https://doi.org/10.1007/BF02511447

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