基于切削过程中刀杆振动的动态特性,建立了借以反映刀具磨损的物理模型和数学模型,由此提出了通过检测刀杆上两主振模态方向上振动加速度信号的频段相干函数来在线监测车刀的磨损过程,并制定了相应的判别准则。试验结果表明,该法灵敏度较高,抗切削条件干扰性强,具有良好的应用前景。 Based on the dynamic characteristics of the cutter bar vibration in the cutting process, a physical model and a mathematical model to reflect the tool wear are established. The on-line monitoring is proposed by detecting the coherence function of the vibration acceleration signal in the direction of the two main vibration modes of the cutter bar Tool wear process, and developed a corresponding criterion. The test results show that the method has high sensitivity and strong anti-cutting interference, and has good application prospects.