Force-field instability in surface grinding

  • Marco LeonesioEmail author
  • Paolo Parenti
  • Alberto Cassinari
  • Giacomo Bianchi


In this paper, a particular kind of non-regenerative instability in surface grinding is studied. Clear evidences have been collected suggesting that vibrations can occur suddenly even during the first grinding pass, just after wheel dressing. These circumstances exclude workpiece and wheel surface regeneration as instability origin, whereas both surfaces have to be considered initially smooth. On these bases, the stability of the dynamic system constituted by an oscillating ideal wheel (namely without waviness on the surface) immerged in a positional and velocity-dependent process force field has been studied, demonstrating that, under particular conditions, the force field generates an unstable behaviour. The instability occurrence is strictly related to the oscillation direction of the wheel centre, according to the mode shape associated to the dominant resonance, with respect to the direction of the grinding force (identified by the ratio between its tangential and normal components). The analysis leads to the identification of a simple necessary condition for instability occurrence. The analytical results are confirmed by time-domain grinding simulations and compared with experimental evidences.


Surface grinding Chatter Machine dynamics 


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Copyright information

© Springer-Verlag London 2014

Authors and Affiliations

  • Marco Leonesio
    • 1
    Email author
  • Paolo Parenti
    • 2
  • Alberto Cassinari
    • 1
  • Giacomo Bianchi
    • 1
  1. 1.CNR—Institute of Industrial Technology and AutomationMilanItaly
  2. 2.Department of Mechanical EngineeringPolitecnico di MilanoMilanItaly

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