Dynamics of stainless steel turning: Analysis by flicker-noise spectroscopy |
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Authors: | Grzegorz Litak Yuriy S Polyakov Serge F Timashev Rafał Rusinek |
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Institution: | 1. Department of Applied Mechanics, Lublin University of Technology, PL-20-618 Lublin, Poland;2. USPolyResearch, 906 Spruce St., Ashland, PA 17921, USA;3. Department of Computer Science, New Jersey Institute of Technology, Newark, NJ 07901, USA;4. Karpov Institute of Physical Chemistry, ul. Vorontsovo pole 10, Moscow, 103064, Russia;5. Institute of Laser and Information Technologies, Russian Academy of Sciences, ul. Pionerskaya 2, Troitsk, 142092, Russia |
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Abstract: | We use flicker-noise spectroscopy (FNS), a phenomenological method for the analysis of time and spatial series operating on structure functions and power spectrum estimates, to identify and study harmful chatter vibrations in a regenerative turning process. The 3D cutting force components experimentally measured during stainless steel turning are analyzed, and the parameters of their stochastic dynamics are estimated. Our analysis shows that the system initially exhibiting regular vibrations associated with spindle rotation becomes unstable to high-frequency noisy oscillations (chatter) at larger cutting depths. We suggest that the chatter may be attributed to frictional stick-and-slip interactions between the contact surfaces of cutting tool and workpiece. We compare our findings with previously reported results obtained by statistical, recurrence, multifractal, and wavelet methods. We discuss the potential of FNS in monitoring the turning process in manufacturing practice. |
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Keywords: | Flicker-noise spectroscopy Cutting dynamics Turning process Chatter Time series analysis |
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