Abstract: Aiming at the milling vibration problem of aerospace thin-walled workpieces in the process of milling weight reduction grid, the simulation, theoretical and experimental research were carried out. Based on the principle of direct speed feedback control, an active damping device (ADD) was used to suppress the milling vibration of thin-walled parts with weight reduction grid. First, the principle of direct speed feedback control used by ADD was theoretically verified, and then ANSYS finite element analysis software was used to conduct modal simulation analysis on thin-walled parts with weight reduction grid. Finally, a milling vibration suppression test bench was built to compare the vibration suppression effect of ADD on thin-walled parts with weight reduction grid under different working conditions. The experimental results show that ADD can effectively suppress the milling vibration of thin-walled parts under different working conditions, with a maximum reduction of 79.98%; ADD has the characteristics of a bandwidth of action frequency and can suppress multi-frequency milling vibration; ADD has a vibration suppression effect on thin-walled workpieces with different residual thickness of grid, that is, ADD is effective in the milling process of thin-walled workpieces from thick to thin; ADD can reduce the surface roughness of the workpiece with weight reduction grid.

Key words:  milling vibration; active damping device (ADD); active vibration control; thin-walled workpieces; actuator

WANG Jian, HE Li-dong, YANG Jian-jiang. Vibration control of milling thin-walled workpieces based on active damping technology［J］.Journal of Mechanical & Electrical Engineering, 2022,39(2):262-268.