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Développement d'une méthodologie de réduction des défauts géométriques : application à l'usinage 5-axes de composants de turbomachine

Abstract : This study contributes to the improvement of complex-workpiece of turbomachine production. These parts are mainly composed of flow passages frequently delimited by blades, where the main function is to transfer power between a flow and a mechanical system. So, the geometry of these workpieces is fundamental to obtain a good efficiency of the system. However, blades and/or tool deflections and interferences generate geometrical errors which can reduce the efficiency. To efficiently reduce these problems, a global approach is used. It starts with the study of the workpieces design, Design For Manufacturing approach is used with the definition on fabricability indicators for the 5-axes machining of turbomachine components. This approach ensures that the designed workpieces can be economically produced. Thereafter, a method of selecting machining strategy is proposed; it is based on criteria which express functional request of the workpiece and economical needs. Second part of this thesis deals with the definition of a new approach to reduce interferences problem during the flank milling of non developable surfaces. This method - Computation of Adapted Tool Shape - optimizes the tool shape for a tool path and a surface, to increase the satisfaction of functional requirements of the workpiece. The last part of this study determines the application domain of CATS method, using academic and industrial surfaces.
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https://pastel.archives-ouvertes.fr/pastel-00005522
Contributor : Ecole Arts Et Métiers Paristech <>
Submitted on : Tuesday, April 6, 2010 - 8:00:00 AM
Last modification on : Friday, July 17, 2020 - 2:55:36 PM
Long-term archiving on: : Friday, September 10, 2010 - 2:41:05 PM

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  • HAL Id : pastel-00005522, version 1

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Julien Chaves-Jacob. Développement d'une méthodologie de réduction des défauts géométriques : application à l'usinage 5-axes de composants de turbomachine. Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2009. Français. ⟨NNT : 2009ENAM0026⟩. ⟨pastel-00005522⟩

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