Various values of the tolerances allow to translate

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Unformatted text preview: ance anlysis". 6th CIRP CAT, Enschede (The Netherlands), 1999. Surfaces Seam Analysis J.-P. Petit*, S. Samper*, I. Perpoli* * Laboratoire de Mécanique Appliquée, LMécA/ESIA, BP 806, 74016 ANNECY Cedex, France Abstract: we present an analysis of gap and flush defects for automotive exterior body panels. We will consider position deviations of parts and those deviations are traduced through the concept of small displacements torsor. Thus it is possible to use the model of clearances and deviations domains. This method allows modeling geometric specifications on parts (deviation domains) and clearances in joints (clearance domains). The seam analysis is made in order to verify if the tolerances are compatible with specifications. By our solving, we obtain the set of relative displacements between two parts. This set of displacements is a 6D domain (3 translations plus 3 rotations) and is not visible for the designer, thus we compute a corresponding zone on parts in order to see the results. This post processor zone is shown in a CAD environment. It is then possible to the designer to see consequences of its tolerancing choices. Keywords: tolerancing analysis, surfaces seam, deviation domains, CAD. 1. INTRODUCTION A mechanism is composed of manufactured part...
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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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