These contact points are obtained from cad model

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Unformatted text preview: s which present deviations. To answer to functional requirements (assemblability, accuracy, non interference…), the designer has to define limits of those geometry deviations through a tolerancing. Once this work is done, it is possible to check if the chosen tolerancing satisfy requirements thanks to an operation called tolerance analysis. We distinguish two kind of tolerance analysis: the statistical analysis (not detailed in this paper) and the worst case analysis. We propose in the following a worst case method of tolerance analysis based on the model of clearances and deviations domains. Several works deal with domains (volumes) to translate geometrical specifications or to propose analysis methods. For example, Shah and Davidson use the hypothetical volume called Tolerance Map (T-map) in their approach [Davidson et al., 2002]. For its part, Teissandier has developed a tolerancing model leading on a tool named Proportioned Assembly Clearance Volume (PACV) [Teissandier et al., 1999]. In our point of view, those methods are limited and can deal only with simply cases of assemblies. We propose through our approach to treat a concrete industrial example of tolerance analysis. This example is th...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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