Programming spindle speed variation for machine tool chatter suppression

Abstract This paper presents a novel method for programming spindle speed variation for machine tool chatter suppression. This method is based on varying the spindle speed for minimum energy input by the cutting process. The work done by the cutting force during sinusoidal spindle speed variation S 3 V is solved numerically over a wide range of spindle speeds to study the effect of S 3 V on stable and unstable systems and to generate charts by which the optimum S 3 V amplitude ratio can be selected. For on-line application, a simple criterion for computing the optimal S 3 V amplitude ratio is presented. Also, a heuristic criterion for selecting the frequency of the forcing speed signal is developed so that the resulting signal ensures fast stabilization of the machining process. The proposed criteria are suitable for on-line chatter suppression, since they only require knowledge of the chatter frequency and spindle speed. The effectiveness of the developed S 3 V programming method is verified experimentally.

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