To provide an abnormality detection device capable of detecting deflection of a tool and roundness of a machine hole during machining in drilling by the rotary tool, and also to provide a machine tool equipped with the abnormality detection device.
Cutting force in a radial direction acting on a workpiece in drilling by the rotary tool is directed, the frequency analysis of the detected cutting force is carried out, and a frequency component corresponding to the spindle rotational number of the cutting force and a frequency component corresponding to a value obtained by multiplying the spindle rotational number of the cutting force by the number of blades are extracted. The deflection of the tool is calculated by a frequency component corresponding to the spindle rotational number of the extracted cutting force and the roundness of the machine hole is calculated by a frequency component corresponding to a value obtained by multiplying the spindle rotational number of the extracted cutting force by the number of the blades. The calculated deflection of the tool is compared with the threshold of the deflection of the tool and comparison result is outputted, the calculated roundness of the machine hole is compared with the threshold of the roundness of the machine tool and comparison result is outputted. In this way, the deflection of the tool and the deterioration of the roundness of the machine hole are detected as abnormality.
| JP2634231 | INDUSTRIAL APPLICABILITY: Cutting surface inspection device |
| WO/2021/015239 | TOOL HOLDER, MACHINE TOOL, AND DATA COLLECTION SYSTEM |
| JPH10166243 | NUMERICAL CONTROLLER |
KYOI MASAYUKI
WATANABE SHINOBU
ISHIGURO JUNJI
| JPH11309648A | 1999-11-09 | |||
| JPH08243882A | 1996-09-24 | |||
| JPH06198547A | 1994-07-19 | |||
| JPS62193750A | 1987-08-25 | |||
| JPH09174383A | 1997-07-08 | |||
| JPH04372341A | 1992-12-25 | |||
| JP2000131209A | 2000-05-12 |
Yuji Toda
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