Dynamic Characteristic Calculation of CNC Machine Tool’s Base Based on FEM

Xiao Lei Deng; Jian Chen Wang; Zhao Zhong Zhou

doi:10.4028/www.scientific.net/KEM.546.20

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 546Dynamic Characteristic Calculation of CNC Machine...

Dynamic Characteristic Calculation of CNC Machine Tool’s Base Based on FEM

Abstract:

Base is a main component of CNC machine tool, so its dynamic characteristics impact on machine tool’s machining precision and stability directly. However, the traditional analytic way cannot finish the accurate and complete calculation and analysis. So it is very necessary to make FEM dynamics research on base of machine tool. This paper employs FEM modal analysis to research the free vibration of base which is undamped. And then we can get the nature frequencies of the base’s first six modal, there are 407.79 Hz, 430.47 Hz, 501.23 Hz, 623.63 Hz, 626.51 Hz and 661.19 Hz, respectively. In addition, the first six modal shapes are also obtained. The forth frequency and the fifth frequency are much closed, so they can be considered the multiple roots for the vibration equation. The research results can provide theoretical basis for fault diagnosis，safety operation and vibration control，and the important parameters are useful for structural improvement and optimization design of the NC machine tool．

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Periodical:

Key Engineering Materials (Volume 546)

Pages:

20-24

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.546.20

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Online since:

March 2013

Authors:

Xiao Lei Deng, Jian Chen Wang, Zhao Zhong Zhou

Keywords:

Dynamic, Dynamic Characteristic, Modal Analysis, NC Machine Tool

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