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Title:
MACHINE TOOL, AND DETECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/209134
Kind Code:
A1
Abstract:
A machine tool (1) is characterized by being provided with: a front main spindle (10) provided with a front chuck (12); a rear main spindle (20) provided with a rear chuck (22); a control unit (50) which causes the rear chuck (22) to perform a fastening operation to fasten a workpiece (W), fastened to the front chuck (12), to the rear chuck (22); and a detecting unit (60) for detecting an abnormality accompanying the fastening operation of the rear chuck (22), on the basis of measured data relating to vibrations of at least one of the front chuck (12) and the rear chuck (22).

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Inventors:
INOUE ATSUSHI (JP)
MURAMATSU MASAHIRO (JP)
NOGUCHI KENJI (JP)
KAZAHARI KOHICHI (JP)
Application Number:
PCT/JP2020/014669
Publication Date:
October 15, 2020
Filing Date:
March 30, 2020
Export Citation:
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Assignee:
CITIZEN WATCH CO LTD (JP)
International Classes:
B23B25/06; B23B3/30; B23Q17/12
Foreign References:
JPH03190601A1991-08-20
JP2005001091A2005-01-06
JPS50142593U1975-11-25
JP2017209776A2017-11-30
JPS6334051A1988-02-13
JPH08300240A1996-11-19
JP2009220242A2009-10-01
JP2007326206A2007-12-20
JP2019030954A2019-02-28
Other References:
See also references of EP 3954481A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
Download PDF:
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