Quenching chatter instability in turning process with a vibro-impact nonlinear energy sink

• DOI: 10.1016/j.jsv.2015.06.025
• Publication Date: 2015-07-05T12:18:01Z
• Authors: E. Gourc; S. Seguy; G. Michon; A. Berlioz; B.P. Mann
• Keywords: Sink (geography)

Abstract This paper investigates the passive control of chatter instability in turning processes using a vibro-impact nonlinear energy sink (NES). The workpiece is assumed to be rigid and the tool is flexible. A dynamical model including a nonlinear cutting law is presented and the stability lobes diagram is obtained. The behavior of the system with the vibro-impact NES is investigated using an asymptotic analysis. A control mechanism by successive beating is revealed, similarly to the strongly modulated response in the case of NES with cubic stiffness. It is shown that such a response regime may be beneficial for chatter mitigation. An original experimental procedure is proposed to verify the sizing of the vibro-impact NES. An experimental setup is developed with a vibro-impact NES embedded on the lathe tool and the results are analyzed and validated.