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Exploitation des études de capabilité dans le calcul statistique des tolérances géométriques de localisation

Published online by Cambridge University Press:  06 January 2012

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Abstract

L’article propose une méthodologie pour exploiter les mesures de capabilité des procédés de fabrication dans le calcul des tolérances de localisation d’un ensemble d’éléments géométriques selon les standards ISO 1101 et ASME Y14.5 avec une approche statistique. Le nombre d’éléments géométriques étudiés, les erreurs systématique et aléatoire du procédé de fabrication seront retenues et incluses dans l’approche. Un modèle mathématique explicite est développé dans le but d’identifier les fonctions de distribution statistique pour différents types de tolérances de localisation. À partir de ces distributions, nous présentons une méthodologie servant à estimer les valeurs des tolérances qui permettent de rencontrer un seuil de conformité prétabli, et vice versa. L’article présente également une série d’abaques permettant un usage industriel simple et commode. Plusieurs exemples de calculs sont illustrés et un cas d’étude y est présenté.

Type
Research Article
Copyright
© AFM, EDP Sciences 2011

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References

Références

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