ANOMALY DETECTION DEVICE, MACHINE TOOL, ANOMALY DETECTION METHOD, AND PROGRAM

摘要

An anomaly detection device of a machine tool includes a time series data acquisition section for acquiring target time series data that is the time series data of a moving load in the Z-axis direction of a cutting tool of the machine tool during a drilling process, an evaluation value derivation section for deriving an evaluation value indicating a degree of similarity between at least a part of the acquired target time series data and at least a part of reference time series data that is time series data of the moving load that can be regarded as normal using singular spectrum transformation, and an anomaly determination section for determining the presence or absence of an anomaly of the machine tool based on the derived evaluation value.