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Measurement and Evaluation of Temperature Change of Water Driven Spindle

[+] Author Affiliations
Akio Hayashi, Yohichi Nakao

Kanagawa University, Yokohama, Japan

Paper No. IMECE2016-66446, pp. V002T02A007; 5 pages
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 2: Advanced Manufacturing
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5052-7
  • Copyright © 2016 by ASME


Recently, various precision products such as lenses or mirrors are produced by the ultra-precision machine tools. Then, the single-point diamond cutting is mainly carried out using the ultra-precision machine tool. In order to generate the high accuracy and high quality machined surfaces, the high stiffness and precise rotational accuracy of the spindle is required for the ultra-precision machining tools.

The water driven spindle had been developed for the precision machine tool spindle. This spindle is driven by the generated torque due to the water flow power. Then, the rotational speed can be controlled by the supplied flow rate of water. In addition, the spindle has the water hydrostatic bearings that achieve the high bearing stiffness and precise motion accuracy. Furthermore, it is expected that the water driven spindle has the high thermal stability since the water with low viscosity is used as a coolant media.

If the thermal deformation of the spindle is caused during the machining process, the deformation degrades the machining accuracy, accordingly. Thus, it is desirable that the thermal deformation and the temperature change of each part of the spindle and machine tool structure can be controlled and minimized during machining process.

In this paper, in order to investigate the thermal stability of the water driven spindle, the measurement tests of the temperature of the water driven spindle were carried out. In addition, the power loss due to the water viscosity between the rotor and the casing of the spindle is calculated.

As a result, this paper considers the temperature change and considers the thermal stability of the water driven spindle from the results of experiments.

Copyright © 2016 by ASME
Topics: Temperature , Water



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