NONLINEAR TECHNIQUES TO CHARACTERIZE PRECHATTER AND CHATTER VIBRATIONS IN THE MACHINING OF METALS

摘要: In this paper we report on the use of Poincare sections, phase plane portraits and false nearest neighbor techniques to understand bifurcations in lathe cutting aluminum. The experiments presented here offer further evidence deterministic tool vibrations below classical onset chatter. While chatter exhibits strong periodic content, these prechatter dynamics exhibit both quasiperiodic chaotic vibrations. method neighbors predicts an embedding dimenion between 4 6 for conditions while showing a random characteristic no-cutting running machine. A one-dimensional delay-differential equation model is which some characteristics sections experimental time series.