Abstract
Among machining chatter control methods, spindle speed variation (SSV) method is certified as a feasible and effective way: machining chatter can be suppressed by continuously and periodically fluctuating the spindle speed of the machine tool. This paper presents a systematic stability analysis of SSV method for machining chatter suppression based on a machining chatter model of non-linear delay differential equation. The theoretical results are verified by results of numerical simulations and experiments. Some important results are achieved: the stability increment index (SII) of SSV cutting over constant speed cutting is derived; the mechanism of SSV method revealed by means of internal energy analysis; a formula for selecting the SSV amplitude is proposed based on the internal energy analysis of the SSV cutting and the instantaneous sideband effect, which is meaningful for practical application of SSV cutting.
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