Modélisation et optimisation numérique de l'emboutissage de pièces de précision en tôlerie fine

Abstract : The present study deals with an industrial project proposed by a luxembourgian enterprise and in collaboration with the luxembourgian research centre Henry Tudor (Laboratory of Industrial Technologies (LTI)). The main objective is to build a numerical approaches for the determination of the initial blank shape contour and tools shape for 3D thin metallic precision parts obtained by stamping, knowing the 3D CAD geometry of the final part. The purpose of the present procedure is to replace the expensive and time consuming experimental trial and error optimization method. Two numerical approaches have been proposed, the first is regarding the determination of the blank shape. An estimation of the blank shape can be given using the Inverse Approach. Update of the blank shape will then be continued by iterations combining heuristic optimization algorithms and incremental stamping codes. The second approach is based on precise finite element models and on spring-back compensation algorithm. The numerical approaches are tested in the case of a special stamping process where the parts are pressed in one or more steps using a manual press, without blank holder and by the mean of complex shape tools
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Mohamed Azaouzi. Modélisation et optimisation numérique de l'emboutissage de pièces de précision en tôlerie fine. Autre. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL098N⟩. ⟨tel-01752909⟩

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