ABNORMALITY DETECTION DEVICE COMPRISING ABNORMALITY DETECTION FUNCTION OF MACHINE TOOL AND ABNORMALITY DETECTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide an abnormality detection device and an abnormality detection method comprising a function for detecting a symptom of breakage, before a main axis of a machine tool is broken.;SOLUTION: An abnormality detection device for detecting abnormality or breakage of a main axis 12 or a main axis motor 14 comprises the main axis motor 14 and a motor control device 16. The motor control device 16 comprises: a timing part 42 for timing a main axis stop time since the main axis motor 14 accelerated to a predetermined rotation speed starts inertia travel, until the main axis motor 14 is stopped; a storage part 44 for storing the main axis stop time measured by the timing part 42; and a comparison part 46 for comparing plural pieces of data related to the main axis stop time stored in the storage part 44, and based on the comparison result, determining presence/absence of abnormality of the main axis or main axis motor.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT