2002 davidson jk shah jj geometric tolerances a

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Unformatted text preview: e obtained from CAD model, their coordinates are expressed in the global frame of the mechanism. Figure 5; Contact graph and analysis graph Contact surfaces of these nine elementary joints (three planar joints, three edge slider joints and three point slider joints) are known as functional features and limits of their geometrical deviations are fixed by tolerancing. For confidentiality reasons, we will not give in this paper the definition drawings provided by the customer. A definition by tolerance zone is given for each type of contact surfaces. The tolerance for a surface of a planar joint is 0.3 mm, of an edge slider joint 0.2 mm and of a point slider joint 0.1mm. Each of the three tolerance zone is modelled by a deviation domain expressed at the point O representing the centre of the general frame. This operation is made for all the specifications in order to obtain the corresponding deviation domain. 250 J.-P. Petit, S. Samper and I. Perpoli This fact, the relative position of the part...
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