Title:
工作機械の主軸装置
Document Type and Number:
Japanese Patent JP6684673
Kind Code:
B2
Abstract:
A main spindle device for a machine tool includes a main spindle, a cushioning member, and an arithmetic unit. The cushioning member is disposed on a position where a vibration displacement of a rotator exists. The arithmetic unit uses data of a tool to be used to analyze a vibration mode in a free vibration of the rotator based on a support rigidity of a bearing, masses of respective parts of the rotator including the tool, an attenuation coefficient, and an equation of motion derived from rigidity and inertia by a rotation. An outer diameter of a sleeve positioned outside the bearing is changed such that a position of an antinode of the vibration or a position on which a vibration displacement exists in the vibration mode matches a position of the cushioning member inside the main spindle to change a preload on the bearing.
Inventors:
Koike Kazunari
Naoki Kawada
Naoki Kawada
Application Number:
JP2016141640A
Publication Date:
April 22, 2020
Filing Date:
July 19, 2016
Export Citation:
Assignee:
Okuma Corporation
International Classes:
B23B19/02; B23Q11/00; F16C25/08
Domestic Patent References:
| JP2010201587A | ||||
| JP5138408A | ||||
| JP2004150563A | ||||
| JP61252044A | ||||
| JP2014094420A | ||||
| JP8174306A | ||||
| JP2004508509A |
Foreign References:
| US6505972 |
Attorney, Agent or Firm:
Yoshiki Ishida