Title:
SPINDLE DEVICE OF MACHINING CENTER
Document Type and Number:
WIPO Patent Application WO/2011/037140
Kind Code:
A1
Abstract:
Loads acting on all bearings (131, 132, 133) which axially support a spindle (12) according to changes in the state of the spindle have been derived, and further the raceway surface/contact surface pressure of each of the bearings has been analyzed, thus making it possible to accurately grasp the state of each of the bearings. Meanwhile, when the raceway surface/contact surface pressure exceeds a threshold value, the raceway surface/contact surface pressure is controlled so as not to exceed the threshold value by changing working conditions, and further when the raceway surface/contact surface pressure exceeds the threshold value even if the working conditions are changed, the spindle is controlled so as to be stopped, thus making it possible to prevent the seizing of each of the bearings. As a result, the spindle can be controlled with high accuracy to improve the working accuracy.
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Inventors:
MATSUNAGA Shigeru (5-8 Minamisemba 3-chome, Chuo-ku, Osaka-sh, Osaka 02, 〒5428502, JP)
Application Number:
JP2010/066415
Publication Date:
March 31, 2011
Filing Date:
September 22, 2010
Export Citation:
Assignee:
JTEKT CORPORATION (5-8 Minamisemba 3-chome, Chuo-ku Osaka-sh, Osaka 02, 〒5428502, JP)
株式会社ジェイテクト (〒02 大阪府大阪市中央区南船場３丁目５番８号 Osaka, 〒5428502, JP)
株式会社ジェイテクト (〒02 大阪府大阪市中央区南船場３丁目５番８号 Osaka, 〒5428502, JP)
International Classes:
F16C19/52; B23B19/02; B23Q5/58; B23Q15/12; B23Q17/00; F16C41/00; G05B19/18
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