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Intégration de fonctions avancées à l'inter-strate de pièces réalisées par le procédé de Stratoconception : méthodologie et développement des outils associés

Abstract : Our research works are related to rapid prototyping, and specially to the Stratoconception process. The process consists in automatically decomposing the object into a series of elementary layers, called strata. Each of these strata is directly manufactured using high-speed 2.5 axis micro-milling of slabs of material. All of these elements are then assembled in order to reconstruct the final part. If machining is automated, assembling is a manual task. An assessment of the current used methods for layers assembly show the disadvantages and the limitations of these techniques. Our contribution relates to a new assembly method: jointing. It allows the integration of assembly features into layers, it improves fixing and reduces the manufacturing time and costs. We developed a process planning system in the process to generate this features. The software tools are abled to automate this operation, by generating assembly features, their form, their dimensioning and especially their location into layers. We present various approaches of localization of these features through placement algorithms based on grids, forces of repulsion or genetic algorithm. The development of an original localization skeleton-based algorithm made it possible to optimize the placement of the features taking into account layers geometry. One second approach is proposed: complete jointing. The joint is generated from inter-layers contours induced the build-in shape problem, i.e. male and female complementary shapes machining by the tool. Lastly, we conclude the manuscript by highlighting the first industrial results through the tools integrated into the process software and the parts manufactured by this new method.
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Benoît Delebecque. Intégration de fonctions avancées à l'inter-strate de pièces réalisées par le procédé de Stratoconception : méthodologie et développement des outils associés. Autre. Université Henri Poincaré - Nancy 1, 2007. Français. ⟨NNT : 2007NAN10102⟩. ⟨tel-01748270⟩

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