Abstract
In high speed machining, the interaction between the variable drive frequencies and the excitation frequencies due to bearing defects of the spindle is studied in this paper. The interference between both phenomena causes an amplification of vibration, harmful for the machining stability and chatter, the surface quality, as well as the dynamic behavior of the spindle. Even if the implications of such interference highly affect the reliability of the machining process and the production by creating new critical speeds, this phenomenon has not been yet identified as the cause of the problem. The excited frequencies resulting from this interference imply new critical rotational speeds that should simply be prohibited while establishing cutting parameters. The observation of this phenomena help to diagnose bearing defects. Transient experimental results -conducted up to 30000 rpm- showed the interference phenomenon and pinpointed the critical speeds that can be avoided, after bearing maintenance.
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Badri, B., Thomas, M., Sassi, S. (2012). Variable Drive Frequency Effect on Spindle Dynamic Behavior in High Speed Machining. In: Fakhfakh, T., Bartelmus, W., Chaari, F., Zimroz, R., Haddar, M. (eds) Condition Monitoring of Machinery in Non-Stationary Operations. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28768-8_56
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DOI: https://doi.org/10.1007/978-3-642-28768-8_56
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-28767-1
Online ISBN: 978-3-642-28768-8
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