超声波椭圆振动切削加工系统稳定性研究

Study on machining stability of ultrasonic elliptical vibration cutting system

切削加工系统的稳定性是影响零件加工质量的重要因素之一。通过建立超声波椭圆振动切削系统动力学模型,对超声波椭圆振动切削系统稳定性进行了分析,从理论上预测出超声波椭圆振动切削的稳定极限,并对其进行Matlab仿真,得出稳定极限图。最后介绍了高温合金材料弱刚度零件加工试验情况,证实了与普通加工系统相比,超声波椭圆振动切削加工系统处于分离状态时具有更高的加工稳定性,可以提高弱刚度零件的加工质量。

Machining system stability is one of the important factors of influencing machining quality. The machining stability of ultrasonic elliptical vibration cutting system is analyzed by means of the established dynamic model of the ultrasonic elliptical vibration cutting system to predict the theoretic stability limit of the ultrasonic elliptical vibration cutting. The stability limit curve of the machining system is drawn with Matlab. The testing situation of the face cutting of the high temperature alloy workpiece with weak rigidity are processed, which proves that the stability of ultrasonic elliptical vibration cutting system is higher than that of ordinary cutting systems when it is in separating status. As a result, it can improve the machining quality of the workpieces with weak rigidity.