垂直平面内二维超声振动铣削系统稳定性研究
Study on the Stability of Two Dimensional Ultrasonic Vibration-Milling System in Vertical Plane

为研究垂直平面内二维超声振动铣削系统的稳定性，建立了垂直平面内二维超声振动铣削稳定性模型，采用全离散法对二维超声振动铣削稳定性进行了研究，利用Matlab软件进行了数值仿真，获得了系统的稳定性叶瓣图。铣削钛合金材料颤振实验结果表明，主轴转速在1000～3500 r/min范围内，数值仿真结果与实验结果吻合较好，验证了垂直平面内二维超声振动铣削稳定性模型的正确性。在垂直平面内施加二维超声振动能提高系统的稳定性，轴向切深极限最大提高了约13.6%。
In order to study the stability of the two dimension ultrasonic vibration milling system in vertical plane, the stability model of a two-dimensional ultrasonic vibration milling in vertical plane is established. The stability of the two dimensional ultrasonic vibration milling is studied using the full discrete method. The stability of the system is obtained by numerical simulation using Matlab software. The results of chatter test for milling titanium alloy material show that the numerical simulation results are in good agreement with the experimental results when the speed was 1 000～3 500 r/min. The correctness of the stability model of two dimensional ultrasonic vibration milling in vertical plane is verified. The stability of the system can be improved by applying two dimensional ultrasonic vibration in the vertical plane. The axial depth limit maximum of cut is increased by about 13.6%. The research fills up the blank of the two-dimensional ultrasonic vibration assisted milling stability study.