Chatter milling modeling of active magnetic bearing spindle in high-speed domain |
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| Authors: | Etienne Gourc,Sé bastien Seguy,Lionel Arnaud |
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| Affiliation: | aUniversité de Toulouse, INSA, ICA (Institut Clément Ader), 135 avenue de Rangueil, F-31077 Toulouse cedex 4, France;bUniversité de Toulouse, ENIT (École Nationale d'Ingénieurs de Tarbes), LGP (Laboratoire Génie de Production), 47 avenue d'Azereix, BP 1629, F-65016 Tarbes cedex, France |
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| Abstract: | A new dynamical modeling of Active Magnetic Bearing Spindle (AMBS) to identify machining stability of High Speed Milling (HSM) is presented. This original modeling includes all the minimum required parameters for stability analysis of AMBS machining. The stability diagram generated with this new model is compared to classical stability lobes theory. Thus, behavior's specificities are highlighted, especially the major importance of forced vibrations for AMBS. Then a sensitivity study shows impacts of several parameters of the controller. For example, gain adjustment shows improvements on stability. Side milling ramp test is used to quickly evaluate the stability. Finally, the simulation results are then validated by HSM cutting tests on a 5 axis machining center with AMBS. |
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| Keywords: | Chatter Machining dynamics High-speed milling Spindle Active magnetic bearing |
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