Milling chatter suppression of thin-walled part by rotary passive damper with tunable stiffness
YANG Yiqing, XIE Richeng, XU Dongdong
School of Mechanical Engineering and Automation, Beihang University, Beijing 100191,China；
Beijing Engineering Technological Research Center of High-Efficient & Green CNC Machining Process and Equipment, Beijing,100191,China
Abstract：Chatter is caused because of the poor rigidity of thin-walled parts during the milling process, which restricts the machining quality and efficiency. A novel rotary passive damper with variable stiffness is designed, and its natural frequency can been changed through rotating the damper orientation. The design geometry is determined based on the vibration theory and finite element method (FEM).The optimal installation angle for chatter suppression of thin-walled parts milling is determined after performing modal tests. Finally, the vibration suppression performance is verified by cutting experiments. It shows that the amplitude of the damped frequency response function for the damper orientation of 80° is dropped to 9.8% by comparing to the undamped case. The optimal vibration suppression is reached when the damper is oriented to 20°. Comparing with the orientation 80°, the amplitude of the damped frequency response function is further reduced to 13.6% and the experimental critical depth of cut is increased by 1.8 times.
杨毅青，谢日成，徐东东. 旋转变刚度阻尼器抑制薄壁零件铣削颤振[J]. 振动与冲击, 2018, 37(2): 72-75.
YANG Yiqing, XIE Richeng, XU Dongdong . Milling chatter suppression of thin-walled part by rotary passive damper with tunable stiffness. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(2): 72-75.
