Position Tolerance Process Capability Prediction under Maximum Material Condition

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Abstract:

Process capability prediction methods for position tolerance under maximum material condition were discussed in this paper. Due to application of maximum material condition the position tolerance specification varied individually for each part, percentage normalization and minimum gap methods were introduced to calculate the position process capability index. Link was taken as an example, true position percentage normalization and minimum gap of 30 parts were calculated. Considering the true position constitution relative to position tolerance at maximum material condition, related individual percentages were used to express the result and the same tolerance size 100% was obtained as for a unilateral tolerance. Set the acceptable value was 0, minimum gap between a hole and a simulated position gauge pin is studied instead of position. The process capability prediction results of two methods were calculated by Minitab software.

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Periodical:

Advanced Materials Research (Volumes 945-949)

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107-110

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Online since:

June 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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DOI: 10.1081/qen-120001875

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DOI: 10.3403/30078857

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