The approach presented here is centred on a systematic construction technique of surface models of forged parts. After having presented a construction scheme, some coherence checking routines for the generated forms are presented. Effectively, any defect related to the construction process leads to disasters at the machining stage or during other treatments, i.e. : modification of the part geometry, simulation of the forging process, part dimensioning, etc. The developments introduced here arerelated to the set up of a systematic process of surface creation, to the identification of the entities used during this process and of the operators involved. An approach guaranteeing the compatibility of the construction parameters of the surface isalso presented.
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