| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of machining a workpiece in a machine tool capable of securing working accuracy by surely preventing warmup operation from being performed more than necessary and starting the machining of the workpiece after thermal deformation is surely stabilized without relying upon a worker and also provide a behavior measuring device. SOLUTION: This method of machining a workpiece in a machine tool includes a first step of continuously measuring the position of the edge of a tool attached to a spindle (step S4), a second step of calculating the displacement of the tool edge position from a result of the measurement (step S5), a third step of monitoring a time period during which the displacement is within a preset allowable displacement (step S8), a fourth step of continuing the warm-up operation when the time period during which the displacement is within the allowable displacement is shorter than a preset range of time, and terminating the warm-up operation when the time period reaches the range of time (step S9), and a fifth step of starting machining the workpiece when the warm-up operation is terminated (step S10). COPYRIGHT: (C)2009,JPO&INPIT
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