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Méthodologie de conception pour la réalisation de pièces en Fabrication Additive

Abstract : The aim of this thesis is to propose a design methodology to produce parts using additivemanufacturing (AM). Compared to standard manufacturing processes, as machining, forming, casting ormolding, AM processes have new features for manufacturing multi-material parts, nondetachableassemblies or complex shapes. The arrival of this new technology involves a paradigm shift that requiressupport to designers to develop quality products. Also the mechanical and finishing specifications of theparts obtained by AM depend on their orientation during the manufacturing. Furthermore, depending onthe process, the desired geometry and the orientation, it could be necessary to integrate a support in orderto ensure manufacturability of the part. We define a design methodology that respects the integrity of thedigital channel and whose purpose is to produce a sliced numerical model ready to be manufactured on anAM machine. For this, our methodology is based on data from functional specification and businessknowledge of the process indicated by the designer, to automatically propose a first solid geometry whichsatisfies all these requirements. After this first step, a step of topological optimization restricts the volumeof the part in order to reduce its weight, cost and manufacturing time. Finally, if necessary, optimizedsupport ensuring the manufacturability of the part is generated according to the same criteria. Thismethodology is accompanied by an industrial case study as well as of two experiments to observe thepossibility to finish parts made of ABS with acetone. The first experiment is an experimental design whichmeasures the obtained surface finish based on the temperature of the acetone, the operating time, theinclination of the surfaces of the piece and its thickness. The second experiment is a tensile stress testdesigned to observe a change in the mechanical resistance of the part. Regardless of the type of machineand the AM process, the methodology we propose is a first concrete step towards obtaining directlycompliant parts, whether for industrial or domestic use.
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Submitted on : Thursday, July 16, 2015 - 12:08:47 PM
Last modification on : Friday, August 5, 2022 - 2:54:00 PM
Long-term archiving on: : Saturday, October 17, 2015 - 11:02:36 AM


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  • HAL Id : tel-01176962, version 1


Nicolas Boyard. Méthodologie de conception pour la réalisation de pièces en Fabrication Additive. Génie mécanique [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2015. Français. ⟨NNT : 2015ENAM0015⟩. ⟨tel-01176962⟩



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