Machining time prediction device and machining time prediction method

A machining time predicting apparatus that predicts, based on a machining program, a machining time for a machine tool to machine a workpiece by controlling at least one axis, the machining time predicting apparatus comprising:

• an analysis unit that analyzes the machining program to generate an operation command for the axis;
• an execution control unit including an interpolation unit that manages execution of the operation command and to command an operation of the axis based on a result of analyzing the machining program, and an operation completion determination unit that determines that the operation of the axis has been completed;
• an axis control unit that generates a control command based on the operation command for the axis from the interpolation unit;
• a machining time predicting unit that predicts the machining time by calculating a time required for execution of the machining program;
• and
• an axis operation simulation unit that simulates, based on the control command, the operation of the axis and calculates virtual responses of the operation of the axis by simulating feedback control with a servo control model and a plant model,
• wherein the operation completion determination unit determines, based on the virtual responses, that the operation of the axis is complete,
• wherein the machining time predicting unit calculates the time required for execution of the machining program from a command time of the machining program and a waiting time, the waiting time being obtained from the control command and completion of the operation of the axis.