| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration suppressing apparatus which can achieve an exact optimum rotational speed, and further can shorten the time necessary for calculating the optimum rotational speed from the beginning of chatter vibration. SOLUTION: The vibration suppressing apparatus 10 comprises vibration sensors 2a to 2c for detecting the acceleration of the vibration of a rotary shaft 3 during rotation in the time domain, and a control unit 5 which calculates the frequency of the chatter vibration and the acceleration of the vibration of the rotary shaft 3 in the frequency domain at the frequency of the chatter vibration based on the acceleration of the vibration in the time-domain detected by the vibration sensors 2a to 2c, and also calculates the optimum rotational speed based on specified parameters and turns the rotary shaft 3 at the calculated optimum rotational speed when the calculated acceleration of the vibration in the frequency domain exceeds a specified threshold value. COPYRIGHT: (C)2009,JPO&INPIT
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