The tool with large aspect ratio is widely used in machining workpieces with deep cavity and deep hole characteristics. With the increase of the suspension length

the equivalent stiffness of the tool decreases

which leads to strong cutting vibration. The design of large aspect ratio turning tool with built-in piezoelectric ceramic damper can transform the vibration of main structure into the vibration of damper mass and the electric energy output of piezoelectric ceramic

so as to improve the vibration reduction effect. The modal experiment shows that the resonance peak value of the damped tool is reduced by 80.1% compared with the original tool. Finally

several cutting experiments were carried out. After adding damper

the peak value of tool’s FRF decreased by 72%

and the surface roughness of the workpiece decreased by 67.2%. At the same time

the output voltage signal collected is 1.1–10.1V

which was closely related to the cutting vibration.