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Real-time monitoring of the flexural and torsional vibration of the main axle of a numerically-controlled machine tool

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Abstract

We describe and investigate a method to monitor flexural and torsional vibration of the main axle in a numerically controlled machining tool. The method uses the Doppler-frequency shift of a laser beam. More specifically, the axle vibration is measured using the differential method of two parallel beams and Mach–Zehnder heterodyne interference. The two beams irradiate a symmetrical section of the main axis with equal light intensity. The resulting Doppler frequency shift of the scattered light is affected by both flexural and torsional vibration. The scattered beam interferes with a reference beam. The interference signal after mixing is measured with a photoelectric detector. By using frequency discrimination, we can decouple the transient rotation speed from the torsional vibration of the machine tool. Our experimental results indicate that the transient linear velocity deviation of our measuring system is less than ±0.3 mm/s. Our study shows that it is possible to measure the vibration in a machine tool spindle at high speed rotation with good reliability.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 61505169), and also was supported by Key projects in Sichuan province department of education (No. 15zd1114), and the natural science foundation of Southwest University of science and technology (No. 14zx7160), and was supported by the Key Project of Fundamental Co-construction of Sichuan Province in China (No. 13zxzk06).973 of Ministry of Science and technology of China (Grant No. 2013CB035405).

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Authors and Affiliations

  1. National Numerical Control System Engineering Research Center, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, People’s Republic of China

    Yuan Xiu-kun & Tang Xiao-qi

  2. College of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang City, 621010, Sichuan Province, People’s Republic of China

    M. A. Guo-lu

Authors
  1. Yuan Xiu-kun
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  2. Tang Xiao-qi
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  3. M. A. Guo-lu
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Correspondence to Yuan Xiu-kun.

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Xiu-kun, Y., Xiao-qi, T. & Guo-lu, M.A. Real-time monitoring of the flexural and torsional vibration of the main axle of a numerically-controlled machine tool. J Opt 46, 352–357 (2017). https://doi.org/10.1007/s12596-016-0385-7

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  • DOI: https://doi.org/10.1007/s12596-016-0385-7

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