Title:
MACHINE TOOL
Document Type and Number:
Japanese Patent JP2021024000
Kind Code:
A
Abstract:
To extract a tool from a main spindle without making a large impact and vibration act on the main spindle and the tool when a machine tool is operated from a long nonoperation state.SOLUTION: A machine tool 1 includes: a main spindle on which a tool is detachably installed; a tool changer for holding a plurality of tools and attaching and detaching any of the tools to/from a main spindle; a date storage unit 17 for storing a date when operation of the main spindle was last stopped; and a calculation unit 18 for calculating a stopping time of the main spindle based on the date stored in the date storage unit 17 when the tool is removed from the main spindle. When the stopping time calculated by the calculation unit 18 is longer than a prescribed threshold value, the tool changer performs a removal operation of the tool from the main spindle taking a longer time than in a case where it is equal to or less than the threshold value.SELECTED DRAWING: Figure 3
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Inventors:
ISOBE MANABU
Application Number:
JP2019140799A
Publication Date:
February 22, 2021
Filing Date:
July 31, 2019
Export Citation:
Assignee:
FANUC LTD
International Classes:
B23Q3/155; G05B19/416
Domestic Patent References:
| JP2005230971A | 2005-09-02 | |||
| JPH1142527A | 1999-02-16 | |||
| JPH0526214U | 1993-04-06 | |||
| JP2007290113A | 2007-11-08 | |||
| JP2006272473A | 2006-10-12 | |||
| JP2009241186A | 2009-10-22 |
Attorney, Agent or Firm:
Kunio Ueda
Junichiro Yanagi
Mayumi Oguri
Kunihiko Takeuchi
Junichiro Yanagi
Mayumi Oguri
Kunihiko Takeuchi