發明
中華民國
101104338
I 472402
刀具顫振監控方法
中原大學
2015/02/11
一種刀具顫振監控方法,其係包含下列步驟:擷取一切削振動加速度訊號;於每一間隔預設時間周期內之該切削振動加速度訊號進行分割,以將每一間隔預設時間周期內之該切削振動加速度訊號分割成複數段;判斷每一該複數段之切削振動加速度訊號之增量倍數是否大於一門檻值;對每一間隔預設時間周期內之該切削振動加速度訊號進行一快速傅立葉轉換並計算其振動頻率;判斷該切削振動加速度訊號之振動頻率是否為一切刃通過頻率之倍頻;若兩種判斷皆同時符合,則提高一刀具主軸之轉速,以避免刀具顫振。 A cutter chatter monitoring method comprises the steps of capturing a cutting vibration acceleration signal; dividing the cutting vibration acceleration signal in each predetermined time period into a plurality of segments; determining whether the vibration acceleration signal of each segment is increased by a multiple greater than a threshold value; performing a Fast Fourier Transform of the cutting vibration acceleration signal in each predetermined time period; calculating a vibration frequency; determining whether the vibration frequency of the cutting vibration acceleration signal is a multiple of a cutter passing frequency; and increasing a main shaft rotating speed of a cutter to avoid cutter chatters if both aforementioned conditions are satisfied.
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