Machining step monitoring apparatus and machining step monitoring method

A machining step monitoring apparatus configured to monitor a machining machine that performs cycle machining that repeats a single cycle, the machining step monitoring apparatus configured to determine whether the machining machine is operating normally, the machining step monitoring apparatus comprising:

• a data segmentation unit configured to define machining start time and machining end time of each single cycle, the data segmentation unit configured to segment, from a first physical quantity that temporally changes during the cycle machining in the machining machine, first measurement data indicating the first physical quantity from the machining start time to the machining end time for each single cycle;
• a data length adjuster configured to generate second measurement data by adjusting a data length of the first measurement data to match with a data length of determination reference data indicating, as a reference, a change in the first physical quantity during the single cycle in a case where the machining machine is normally operating;
• and
• a determination processor configured to compare the second measurement data with the determination reference data to determine whether the machining machine is normally operating.