| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for evaluation which enable to accurately evaluate, in a short time, the rotational accuracy of a rotary machine using a rolling bearing, including a main shaft of a machine tool, or the like. SOLUTION: The device 31 for evaluating the rotational accuracy includes a band-pass filter 17 which extracts displacement data on a band corresponding to a revolution frequency of a roller from the displacement data obtained by displacement gages 15 and 15, a measuring time determining part 19 which makes determination as to whether it is the time to perform measurement by the displacement gages 15 and 15, at any timing synchronized with a period of the extracted displacement data, a displacement data recording part 25 which records the extracted displacement data and the displacement data measured by the displacement gages 15 and 15, based on the determination of the measuring time determining part 19, a rotational accuracy calculating part 26 which calculates a change with time of non-repetitive rotational accuracy of the main shaft 8, using the recorded displacement data, and a rotational accuracy output part 27 which outputs the calculated change with time of the non-repetitive rotational accuracy. COPYRIGHT: (C)2010,JPO&INPIT
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