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Title:
APPARATUS FOR DETECTING DEFECT IN WORKPIECE
Document Type and Number:
WIPO Patent Application WO/2019/146010
Kind Code:
A1
Abstract:
Disclosed is an apparatus which is for detecting a defect in a workpiece, and is capable of detecting, with high accuracy, a defect in a machined and molded product with a relatively simple configuration. An apparatus for detecting a defect in a workpiece according to the present invention is configured to detect a defect in a workpiece manufactured by a machining device (H1) driven by a motor (H108), the apparatus being provided with: a phase determining unit which determines an operation phase of the machining device on the basis of a current flowing in the motor; and a defect determining unit which determines whether there is a defect in the workpiece, on the basis of the angular speed of a rotor of the motor in the predetermined operation phase determined by the phase determining unit.

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Inventors:
NAKAHARA TAKASHI (JP)
MAKI KOHJI (JP)
DEGUCHI KENTA (JP)
HORI MASAHIRO (JP)
KANEKO SATORU (JP)
Application Number:
PCT/JP2018/002079
Publication Date:
August 01, 2019
Filing Date:
January 24, 2018
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
B29C45/76; B23Q17/09
Domestic Patent References:
WO2004080690A12004-09-23
WO2013018189A12013-02-07
Foreign References:
JPH0357616A1991-03-13
JPS62119021A1987-05-30
JP2012076454A2012-04-19
JP2017154448A2017-09-07
JP2005161557A2005-06-23
JPS6056853A1985-04-02
JPS59201748A1984-11-15
JPS59187439A1984-10-24
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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