Chatter milling modeling of active magnetic bearing spindle in high-speed domain

Etienne Gourc (1) , Sébastien Seguy (1) , Lionel Arnaud (2)

1 ICA - Institut Clément Ader
2 LGP - Laboratoire Génie de Production

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.

Mots clés: Machining dynamics; Spindle; Chatter; Active magnetic bearing; High-speed milling

Domaines: Génie mécanique [physics.class-ph]

Etienne Gourc, Sébastien Seguy, Lionel Arnaud. Chatter milling modeling of active magnetic bearing spindle in high-speed domain. International Journal of Machine Tools and Manufacture, 2011, 51 (12), pp.928-936. ⟨10.1016/j.ijmachtools.2011.08.008⟩. ⟨hal-00752041⟩