RESEARCH OF DYNAMIC PHENOMENA OCCURRING DURING INTERMITTENT GRINDING

Authors

  • Volodymyr Tonkonogyi Odessa National Polytechnic University, Odessa, Ukraine
  • Alexey Yakimov Odessa National Polytechnic University, Odessa, Ukraine
  • Liubov Bovnegra Odessa National Polytechnic University, Odessa, Ukraine
  • Lina Maizlis Odessa National Polytechnic University, Odessa, Ukraine
  • Anastasia Filanovych Odessa National Polytechnic University, Odessa, Ukraine

DOI:

https://doi.org/10.20998/2078-7405.2019.90.12

Keywords:

cutting ledge, irregular circle, elastic systems of the machine, shock resonance,

Abstract

The purpose of scientific research is to determine the conditions for the creation in the elastic system of useful vibrations that promote self-sharpener the cutting microrelief of the intermittent circle, and the detection of the conditions for appearance the shock and parametric resonances. It was established that with the increase of the circumferential speed of the grinding discontinuous circle VKR, the amplitude of forced oscillations A decreases, and the regions of parametrical stability of the system of the grinding machine are shifted in the direction of decreasing the number of slots n on the working surface of the circle. It has been established that in the studied intervals of numbers of cutting protrusions 5≤n≤40 and the discontinuity factor 0,3≤N≤40, with the decrease of the limb depth of cutting tL, the range of variation of amplitudes of forced oscillations A is narrowed, and the boundaries of the regions of the parametric stability of the system of the machine are expanded. It has been established that in order to maintain the amplitude of the forced oscillations A at a constant level and to prevent the exit from the parametric stability zone of the elastic system, it is necessary, when H- increasing the factor of discontinious N to decrease the number of openings on the discontinious grinding tool. It is established that with the increase in the number of cutting protrusions n in a discontinuous circle, the amplitude of forced oscillations A is decreasing, and the boundaries of the stability regions are expanded. Conditions of discontinuous grinding are found, where in the elastic system of the grinding machine there is no shock and parametric resonance and there is the possibility of self-sharpening of the cutting microrelief of the working surface abrasive tool during its operation.

Author Biographies

Volodymyr Tonkonogyi, Odessa National Polytechnic University, Odessa

Director of the Institute of Industrial Technologies, Design and Management, Professor of the Department, Doctor of Technical Sciences, Odessa National Polytechnic University, Odessa

Alexey Yakimov, Odessa National Polytechnic University, Odessa

Head of the department, doctor of technical sciences, professor, Odessa National Polytechnic University, Odessa

Liubov Bovnegra, Odessa National Polytechnic University, Odessa

Deputy Head of the Department of Educational Work, Associate Professor, Odessa National Polytechnic University, Odessa

Lina Maizlis, Odessa National Polytechnic University, Odessa

Odessa National Polytechnic University, Odessa

Anastasia Filanovych, Odessa National Polytechnic University, Odessa

Odessa National Polytechnic University, Odessa

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Published

2019-05-01

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