Tis paper proposes a three-dimensional (3D) model on manufacturing toleran- cing for mechanical parts. The work presented relies on research conducted at the LURPA on the computation of 3D tolerance chains for mechanisms. Stating From these works, the authors proposed a formalization of the problem within the More specific context of manufacturing tolerances. Models of the workpiece, the Set-ups and the machining operations are provided. The main originality is to Model the machining set-up as a mechanism.
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