| 摘要 |
PROBLEM TO BE SOLVED: To provide a tool position correction method of a machine tool capable of exactly estimating a draw-in amount of a tool generated by the thermal expansion of a tool mounting part of a spindle and the tool, correcting a tool position with high accuracy, and efficiently improving the processing accuracy of a workpiece. SOLUTION: The tool position correction method includes: a first step (S1, S2) for detecting a temperature of the tapered part of the spindle and a temperature of a bed and calculating a temperature increase value of the tapered part of the spindle from the difference of the detected temperatures; a second step (S3-S6) for calculating the draw-in amount of the tool corresponding to the temperature increase value calculated at the first step based on the corresponding relation of the preliminarily obtained draw-in amount of the tool caused from the thermal expansion of the tapered part of the spindle and the temperature increase value of the tapered part of the spindle; and a third step (S7) for correcting a tool position by only the calculated draw-in amount of the tool. COPYRIGHT: (C)2010,JPO&INPIT
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