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Title:
APPARATUS FOR DETECTING OPERATION OF MACHINE TOOL
Document Type and Number:
WIPO Patent Application WO/2000/009289
Kind Code:
A1
Abstract:
An operation detector (10) includes a displacement sensor (44) that detects abnormal condition from vibrations due to excessive cutting resistance or chattering of a cutting tool (18). The sensor (44) includes a coil (46) fixed to an adaptor (40), and a measuring core (50) is provided in retractive manner along a guide (48) for the coil (46). The measuring core (50) is provided on a contact part (52), which is in contact with an inner wall (56) of a movable part (28). The simplified configuration allows the operation of a machine tool to be detected automatically and accurately.

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Inventors:
MASUDA YUKIO (JP)
KOMAI YASUHIRO (JP)
Application Number:
PCT/JP1999/004222
Publication Date:
February 24, 2000
Filing Date:
August 05, 1999
Export Citation:
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Assignee:
NT ENGINEERING KABUSHIKI KAISH (JP)
MASUDA YUKIO (JP)
KOMAI YASUHIRO (JP)
International Classes:
B23Q17/09; B23Q17/12; H04B5/00; (IPC1-7): B23Q17/00; B23Q17/09; H04B15/00; H04B7/12
Foreign References:
JPS49112278A1974-10-25
JPH06114688A1994-04-26
JPH04113004U1992-10-01
JPH06320397A1994-11-22
JPH0879145A1996-03-22
JPH09144404A1997-06-03
JPH04372341A1992-12-25
JPS5914446A1984-01-25
JPS6215060A1987-01-23
Other References:
See also references of EP 1127657A4
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