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Etude dynamique de l'usinage et de l'interaction pièce-outil par mesure des déplacements : application au fraisage et au tournage.

Abstract : ln order to counter tool vibrations problem during machining operations, two different approaches were developed. The first is the tool vibration . prediction, through increasingly sophisticated machining operation models. The second is an experimental approach with the instrumentation of machining centers to monitor and understand the behavior of the tool during machining. Under the second approach, many sensor technologies are used. The aim of this work is to study the behavior of the tool using non-contact dis placement sensor to measure directly the tool vibrations during the machining operation. This approach used in milling and turning allow the study of various aspects of the tool-workpiece interactions. The first point is the investigation of cutting the phenomenon, with the possibility of drawing the tool trajectory in three dimensions or in the plan. The second point is the study of stability or instability of the machining operation. Subsequently, measurements of displacements are used to determine the cutting forces, either for milling or turning operation. The forces applied on the tool will cause its deflection; this deflection is measured by the non-contact displacement sensors. For the milling, a specific calculation method, using Frequency Response Function (FRF) of the tool has been implemented. It allows cutting forces calculation for high spindle speeds. Finally, the reconstruction of the workpiece surface was done. The measured tool displacements are superimposed on the theoretical tool trajectory to determine the surface aspect and profile of the actual machined surface during the operation.
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https://pastel.archives-ouvertes.fr/pastel-00005924
Contributor : Ecole Arts Et Métiers Paristech <>
Submitted on : Thursday, April 1, 2010 - 8:00:00 AM
Last modification on : Friday, July 17, 2020 - 2:55:40 PM
Long-term archiving on: : Thursday, September 30, 2010 - 9:11:12 PM

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  • HAL Id : pastel-00005924, version 1

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Vincent Moreau. Etude dynamique de l'usinage et de l'interaction pièce-outil par mesure des déplacements : application au fraisage et au tournage.. Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2010. Français. ⟨NNT : 2010ENAM0005⟩. ⟨pastel-00005924⟩

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