一、引言机床是一种机械结构,工作时受交变力作用就要“响应”。当交变力的频率与机床结构的某一固有频率相接近时,机床就要产生共振现象,这就是强迫振动。切削过程中产生的交变力往往会引起自激振动,通常简称为颤振。颤振不仅机理复杂,而且危害性更大,因它不象强迫振动那样易于“对症下药”。颤振使加工质量恶化,功率消耗倍增,甚至导致刀具和机 First, the introduction Machine tool is a mechanical structure, work by the role of alternating force will “respond.” When the frequency of alternating force with a certain natural frequency of the machine structure close to the machine to produce resonance phenomenon, which is forced vibration. The alternating force generated during the cutting process tends to cause self-excited vibration, often referred to simply as chatter. Flutter is not only complicated in mechanism, but also more damaging because it is less prone to “prescribing the right remedy” than forced vibration. Flutter deteriorates the machining quality, doubling the power consumption and even leads to knives and machines