Stability analysis of titanium alloy milling by multiscale entropy and Hurst exponent
Department of Applied Mechanics, Lublin University of Technology, Nadbystrzycka 36, 20-618, Lublin, Poland
* e-mail: firstname.lastname@example.org
Revised: 28 August 2015
Accepted: 1 September 2015
Published online: 7 October 2015
This paper discusses the problem of stability in a milling process for titanium super-alloy Ti6242. The phenomenon of chatter vibration is analysed by the multiscale entropy method and Hurst exponent. Although this problem is often considered based on stability lobe diagrams, theoretical findings do not always agree with experimental results. First, a stability lobe diagram is created based on parameters determined by impact testing. Next, cutting forces are measured in an experiment where the axial cutting depth is gradually increased. Finally, the obtained experimental signals are investigated with respect to stability using the multiscale entropy method and Hurst exponent.
© The Author(s), 2015