DEFLECTIONS AND FREQUENCY ANALYSIS IN THE MILLING OF THIN-WALLED PARTS WITH VARIABLE LOW STIFFNESS

Authors

  • Serhii Kononenko National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools http://orcid.org/0000-0002-3874-4772
  • Sergey Dobrotvorskiy National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools
  • Yevheniia Basova National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools http://orcid.org/0000-0002-8549-4788
  • Magomediemin Gasanov National Technical University «Kharkov Polytechnic Institute» http://orcid.org/0000-0002-2161-2386
  • Ludmila Dobrovolska National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools http://orcid.org/0000-0001-8318-8552

DOI:

https://doi.org/10.14311/AP.2019.59.0283

Keywords:

thin-walled parts, undesirable deflections, end milling, modal analysis, harmonic response analysis

Abstract

The disadvantage of the geometry of thin-walled parts, in terms of processing, is the low ability to resist static and dynamic loads. It is caused by the elastic deformation of elements with a low stiffness. Modelling approaches for the evaluation of deflections during machining are presented. Mathematical models of deflections, cutting forces and harmonic response are proposed. The processes of material removal and deflection of a thin-walled sample at the critical points are modelled. A frequency analysis was performed, consisting of a modal analysis of natural frequencies and a harmonic response analysis. As a result, a graph of the deflections amplitude from the frequency of driven harmonic oscillations is generated. The analysis of the obtained values was performed. As a result, the resonance frequency and maximum amplitude of oscillations for the operating parameters are determined.

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Author Biographies

  • Serhii Kononenko, National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools
    Postgraduate at the Department of the technology of mechanical engineering and metal-cutting machine tools of the Educational and scientific institute of mechanical engineering and transport
  • Sergey Dobrotvorskiy, National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools
    Doctor of technical sciences, Full Professor, Professor at the Department of mechanical engineering and metal-cutting machine tools of the Educational and scientific institute
  • Yevheniia Basova, National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools
    PhD, Associate Professor at the Department of the technology of mechanical engineering and metal-cutting machine tools of the Educational and scientific institute of mechanical engineering and transport
  • Magomediemin Gasanov, National Technical University «Kharkov Polytechnic Institute»
    Vice-rector for Scientific-and-Pedagogical Work, Candidate of Technical Sciences, Professor of NTU “KhPI”
  • Ludmila Dobrovolska, National Technical University «Kharkov Polytechnic Institute», Department of Technology of Mechanical Engineering and Metal-Cutting Machine Tools
    Ph.D., Docent, Associate Professor at the Department of the technology of mechanical engineering and metal-cutting machine tools of the Educational and scientific institute of mechanical engineering and transport

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Published

2019-07-01

Issue

Vol. 59 No. 3 (2019)

Section

Articles