Self-oscillation regeneration control by irregular tooth pitches

DOI

10.2991/avent-18.2018.77How to use a DOI?

Keywords

regenerative self-oscillations; control; difference of tooth pitches

Abstract

Machining of workpieces under low rigidity of equipment is often accompanied by excitation of self-oscillations impeding the technological process. Among the causes of selfoscillations, there is their regeneration on the cutting surface. Self-oscillation regeneration can be controlled by target impacts on changes of phase shifts between mark oscillations and current system oscillations. These impacts can be exercised by choosing a cutting speed or its modulation or using irregular teeth pitches. The latter method is more promising for practical application. Therefore, the article describes the results of experimental studies on the influence of the difference of adjacent alternate teeth pitches on the efficiency of self-oscillation control when boring holes, turning non-rigid shafts and end-milling non-rigid workpieces. The designs of experimental multi-tooth boring and turning heads and end mills which can randomly adjust tooth pitches are described. A step-by-step discrete increase in the difference of tooth pitches decreased the self-oscillation amplitude in all experiments where these tools were used. Near self-oscillation suppression was at the value of pitch difference close to a half self-oscillation wave-length. In a wide range of this value, selfoscillations can be controlled as well but the result is rather worse. The experimental data are interpreted in terms of the theory of regenerative self-oscillations.)

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - V M Svinin
AU  - A V Savilov
AU  - T V Zarak
PY  - 2018/05
DA  - 2018/05
TI  - Self-oscillation regeneration control by irregular tooth pitches
BT  - Proceedings of the International Conference "Aviamechanical engineering and transport" (AVENT 2018)
PB  - Atlantis Press
SP  - 399
EP  - 405
SN  - 2352-5401
UR  - https://doi.org/10.2991/avent-18.2018.77
DO  - 10.2991/avent-18.2018.77
ID  - Svinin2018/05
ER  -