Title:
主軸装置
Document Type and Number:
Japanese Patent JP5560603
Kind Code:
B2
Abstract:
By controlling an amount of preload applied to a rolling bearing that supports a spindle in accordance with the change of state of the spindle in actual machining, the rotation of the spindle is controlled in an optimal state, and the service life of the bearing is extended while the required stiffness of the spindle is ensured. When a corrected preload amount falls outside a range of a preload as a controllable region, the corrected preload amount is corrected so as to fall within the range of the preload, That is, an actually controlled preload is regulated to fall within the preset range of preload. Therefore, it is possible to ensure the stiffness of the rolling bearing or prevent heating and excessive increase in contact pressure of the rolling bearing,
Inventors:
Kunimichi Nakajima
Okawa Yuji
Takamasa Shibata
Takahito Umeki
Okawa Yuji
Takamasa Shibata
Takahito Umeki
Application Number:
JP2009169754A
Publication Date:
July 30, 2014
Filing Date:
July 21, 2009
Export Citation:
Assignee:
JTEKT Corporation
International Classes:
B23B19/02
Domestic Patent References:
| JP10089355A | ||||
| JP7096405A | ||||
| JP7042730A | ||||
| JP2007216328A |
Attorney, Agent or Firm:
Kobayashi Osamu
Kiichi Yamamoto
Kiichi Yamamoto
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