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TECHNICAL PAPERS

Effects of Ball Groupings on Ball Passage Vibrations of a Linear Guideway Type Ball Bearing (Pitching and Yawing Ball Passage Vibrations)

[+] Author and Article Information
Hiroyuki Ohta1

Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, Japanohta@mech.nagaokaut.ac.jp

Yoshiki Kitajima

LG Technology Department, NSK Precision Co., Ltd., 1-1 Ohnuma, Hanyu, Saitama, Japan

Soichiro Kato

LG Technology Department, NSK Precision Co., Ltd., 78 Toriba, Maebashi, Gunma, Japan

Yutaka Igarashi

Research Department, NSK Precision Co., Ltd., 78 Toriba, Maebashi, Gunma, Japan

1

Corresponding author.

J. Tribol 129(1), 188-193 (Sep 18, 2006) (6 pages) doi:10.1115/1.2401215 History: Received June 14, 2006; Revised September 18, 2006

The effects of ball groupings on the pitching and yawing ball passage vibrations of linear guideway type ball bearings (linear ball bearings) under low-speed operation were studied. For this study, the test linear ball bearings (which can retain the ball grouping in operation) with three types of ball groupings were manufactured, and the pitching and yawing ball passage vibrations of each test linear ball bearing were measured using a laser autocollimator. Moreover, a calculation method of the ball passage vibrations for a linear ball bearing with an arbitrary ball grouping was presented. According to the presented method the ball passage vibrations for three types of ball groupings were calculated. The experimental and calculated results show that the occurrence of the pitching and yawing ball passage vibrations was affected by the ball groupings. For the occurrence, the wave forms, and the amplitude of the pitching and yawing ball passage vibrations for the ball groupings, the calculated results based on the presented method almost matched the experimental results.

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Copyright © 2007 by American Society of Mechanical Engineers
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References

Figures

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Figure 2

Ball arrangements

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Figure 3

Experimental apparatus

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Figure 4

Center of gravity

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Figure 8

Calculated wave forms of ball passage vibrations (V=1.67×10−4m∕s)

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Figure 7

Coordinates of test bearing

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Figure 1

Test bearing (ball grouping I)

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Figure 6

Effect of linear velocity on rms amplitude of ball passage vibrations

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Figure 5

Measured wave forms of ball passage vibrations (V=1.67×10−4m∕s)

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