Intégration des comportements vibratoires dans les systèmes de Conception et Fabrication Assistées par Ordinateur (CFAO)

Abstract : This research is a generic aspect enquiry on manufacturing process by machining. Its main objective is supporting CAD/CAM systems through an integrated approach aiming to determine vibratory behavior of multi-axis chatter milling. This involves estimating instantaneous Part / Tool interactions, calculating cutting forces and finally determining process stability or instability under certain cutting conditions. Interaction geometry is made particularly complex because of tool and workpiece’s geometry as well as their relative position. In this work, we propose a generic approach based on CAD/CAM systems to extract geometric elements needed to calculate cutting forces at each point of milling path. In addition, with a view to better prediction, we rely on milling tool discretization into infinitesimal edges while developing and implementing milling simulation system for cutting forces and dynamics calculation tool in Simulink/Matlab software. This, thanks to the behavior models of machining system identified experimentally and a specific model of cutting forces incorporating delay factor. In addition, the milling process behavior is determined by applying some criteria to the hereditary system. The interoperability of these two calculation and design tools is culminated with a visual demonstrator of vibration behaviors in milling tool path. Finally, a first experimental study aiming at behavior and cutting forces models adjustment, as well as the generic approach and the demonstrator validation is realized for different milling processes.
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https://pastel.archives-ouvertes.fr/tel-01767839
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Submitted on : Monday, April 16, 2018 - 4:00:06 PM
Last modification on : Tuesday, May 14, 2019 - 4:22:40 PM

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Meriem Hayani Mechkouri. Intégration des comportements vibratoires dans les systèmes de Conception et Fabrication Assistées par Ordinateur (CFAO). Génie mécanique [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM; Ecole Nationale Supérieure des Arts et Métiers (ENSAM), Meknès, 2018. Français. ⟨NNT : 2018ENAM0013⟩. ⟨tel-01767839⟩

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