通过正交切削实验获得不同切削速度下的切屑,在扫描电镜下测量不同切削速度下切屑的微观几何形态与仿真结果进行比较。结果表明,仿真模型较好模拟了切屑的微观几何形态。对钛合金切削加工过程中的锯齿形切屑形成过程进行了仿真,分析了锯齿形切屑形成过程中等效应力、等效应变、等效应变率的分布变化规律。 The cutting chips with different cutting speeds were obtained by orthogonal cutting experiments. The micro-geometry of chips at different cutting speeds was compared with the simulation results under the scanning electron microscope. The results show that the simulation model better simulates the micro-geometry of the chip. The formation process of sawtooth chips in the cutting process of titanium alloy was simulated. The variation of the equivalent stress, equivalent strain and equivalent strain rate in the process of sawtooth chip formation was analyzed.