Process capability indices and risk analysis for circular position tolerance zones

Michael P. Krystek

doi:10.1117/12.885643

31 December 2010 Process capability indices and risk analysis for circular position tolerance zones

Michael P. Krystek

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 75446D (2010) https://doi.org/10.1117/12.885643
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

Abstract

Position tolerance is used in geometric dimensioning and tolerancing to specify tolerances for the location of holes. The tolerance zone for holes is usually cylindrical and the allowable position tolerance is the diameter of the tolerance zone. If holes are used in flat parts, as e. g. sheet metals, it is sufficient to use circular tolerance zones. In order to assure the quality and to reduce the risk to accept products which do not fulfil the design requirements, statistical process control is used in industry. In this paper it is shown, how process capability indices and the associated risk can be calculated for circular position tolerance zones.

Citation Download Citation

Michael P. Krystek "Process capability indices and risk analysis for circular position tolerance zones", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75446D (31 December 2010); https://doi.org/10.1117/12.885643

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