Développement d'une technique originale de mesure des efforts de coupe en usinage à grande vitesse basée sur la technologie des paliers magnétiques actifs : applications au fraisage des matériaux aéronautiques

Abstract : We have developed an original cutting forces measurement method which doesn't need complementary instrumentation of the machine tool. It is based on analysis of information provided by Active Magnetic Bearings (AMB) of the spindle. Cutting forces are obtained by combining command voltages of AMB saved during machining and eight AMB/tool Transfer Functions (FT) experimentally measured when the rotor doesn't move. Our cutting forces measurements are in good agreement with Kistler and Dyna TK dynamometer in their application field (respectively 1 kHz and 8 kHz). Taking account of gyroscopic effects need to replace the eight experimental AMB/tool FT by those obtained using a finite element analysis of the set rotor/toot-holder/tool in our cutting forces measurement method. Frequency spectrum of cutting forces is similar to the one measured by piezoelectric dynamometers in their application field. Moreover, spectral arrays appear at frequencies greater than 9 kHz on spectrum of cutting forces. Cutting forces that are measured using command voltages of AMBs are multiplied by stiffness at the end of the tool obtained by the finite elements simulation to provide the measurement of the displacement of the tool during machining.
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Sébastien Auchet. Développement d'une technique originale de mesure des efforts de coupe en usinage à grande vitesse basée sur la technologie des paliers magnétiques actifs : applications au fraisage des matériaux aéronautiques. Autre. Université Paul Verlaine - Metz, 2004. Français. ⟨NNT : 2004METZ029S⟩. ⟨tel-01750054⟩

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