Title:
NUMERICAL CONTROL DEVICE AND CHATTERING IDENTIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/208685
Kind Code:
A1
Abstract:
This numerical control device (1) is characterized by comprising: a drive command unit (15) for issuing operation commands for a main shaft (101) and feed shaft (102) of a machine tool (100); a sensor signal processing unit (11) for generating a plurality of types of state quantities on the basis of a sensor signal (200) obtained by detecting the vibration of a workpiece or a tool attached to the machine tool (100); a timing signal generation unit (16) for periodically generating and outputting a timing signal (207) at a timing synchronized with the rotation of the main shaft (101); a phase difference calculation unit (12) for generating, for each timing signal (207), dimensionless quantities representing the plurality of types of state quantities in a state space and calculating phase difference information (203) indicating the differences between the phases of the dimensionless quantities; and a vibration identification unit (13) for identifying chattering in the machine tool (100) on the basis of dispersion in the phase difference information (203).
Inventors:
IKEDA RYOSUKE (JP)
TAKAHEI KAZUKI (JP)
TAKAHEI KAZUKI (JP)
Application Number:
PCT/JP2019/015327
Publication Date:
October 15, 2020
Filing Date:
April 08, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01H3/10
Domestic Patent References:
| WO2014115395A1 | 2014-07-31 | |||
| WO2014098172A1 | 2014-06-26 |
Foreign References:
| JP2013007647A | 2013-01-10 | |||
| JPH08229772A | 1996-09-10 | |||
| JP2013240837A | 2013-12-05 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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