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IJAT Vol.9 No.3 pp. 297-302
doi: 10.20965/ijat.2015.p0297
(2015)

Paper:

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Performance of High-Speed Precision Air-Bearing Spindle with Active Aerodynamic Bearing

Hiroshi Mizumoto*, Yoichi Tazoe**, Tomohiro Hirose**, and Katsuhiko Atoji**

*Tottori University
4-101 Koyama-Minami, Tottori, Tottori 680-8550, Japan

**Nachi-Fujikoshi Corp.
1-1-1 Fujikoshi-Honmachi, Toyama 930-8511, Japan

Received:
January 14, 2015
Accepted:
April 11, 2015
Published:
May 5, 2015
Creative Commons License
Keywords:
active control, aerostatic bearing, aerodynamic bearing, machine tool, piezoelectric actuator
Abstract
A high-speed precision air-bearing tool spindle with active aerodynamic bearing is proposed for improving the quality of machining using small-diameter cutting and grinding tools. The spindle is basically supported by aerostatic radial and thrust bearings. According to the spindle vibration detected by capacitance sensors, the wedge angle of the active aerodynamic bearing was controlled using piezoelectric actuators, thereby suppressing the spindle vibration. In the present paper, the performances of a prototype air-bearing spindle with single-row active aerodynamic bearing and an improved air-bearing spindle with double-row bearings are reported. Through experiments, it was demonstrated that the maximum rotational speed controlled by the active aerodynamic bearing is 800 Hz (48,000 min-1), and that the amplitude of spindle vibration can be suppressed to <50 nm at the rotational speed of 500 Hz (30,000 min-1).
Cite this article as:
H. Mizumoto, Y. Tazoe, T. Hirose, and K. Atoji, “Performance of High-Speed Precision Air-Bearing Spindle with Active Aerodynamic Bearing,” Int. J. Automation Technol., Vol.9 No.3, pp. 297-302, 2015.
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