Chatter identification in turning process based on vibration analysis using Hilbert-Huang transform

  • Agus Susanto Department of Railway Engineering, State Polytechnic of Madiun, Serayu No. 84, 63131, Madiun, Indonesia. Phone: (0351) 452970; Fax: (0351) 492960
  • K. Yamada Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan
  • R. Tanaka Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan
  • Y. A. Handoko Department of Mechanical & Aerospace Engineering, Bandung Institute of Tech., Bandung, Indonesia. Division of Rolling Stock, INKA, Indonesia
  • M. F. Subhan State Polytechnic of Malang, Soekarno Hatta No.9, 64151, Malang, Indonesia
Keywords: chatter, turning, time-frequency analysis, Hilbert-Huang transform, short-time Fourier transform

Abstract

In machining process, the increasing cutting depth is aimed to accelerate machining operations in a short time. However, the increasing cutting depth can cause chatter vibration at any time. Chatter can accelerate tool wear and lead to poor machined surface. This paper studied the application of Hilbert-Huang transform (HHT) to analyse chatter caused by the increasing cutting depth during operation. Chatter vibration is typical of non-stationary and non-linear vibration signals, therefore it should be analysed by appropriate signal processing; HHT. In this research, initially “hammering tests” were conducted to observe dynamic modal parameters of cutting system; modal mass, damping ratio, and stiffness. Then stability lobe chart was generated based on those dynamic modal parameters to determine cutting parameters. Second, turning tests were conducted and then vibrations obtained in turning tests were analysed using HHT for chatter detection. The results were then compared by conventional signal processing; short-time Fourier (STFT) transforms. The results show that the empirical mode decomposition (EMD) of HHT process separated complex vibrations into simple components and isolated chatter from the others. The chatter was isolated in the first IMF. Therefore, chatter can be identified by EMD process. In the spectrum analysis, HHT spectra showed its superiority over STFT spectra. HHT spectra provided high time resolution and high frequency resolution both rather than STFT spectra that provided blurry and blocked spectra. The implication is that HHT can be applied to monitor the machining process.    

Published
2020-06-23
How to Cite
Susanto, A., Yamada, K., Tanaka, R., Handoko, Y. A., & Subhan, M. F. (2020). Chatter identification in turning process based on vibration analysis using Hilbert-Huang transform. Journal of Mechanical Engineering and Sciences, 14(2), 6856 - 6868. https://doi.org/10.15282/jmes.14.2.2020.25.0537
Section
Article