Chatter easily occurs during the milling process of thin-walled part

and the stability limit is varied due to the changing of part dynamics. The passive damping technology based on viscoelastic material is investigated in order to promote the damping ratio and machining stability of the thin-walled part. A methodology consisting of damping layer

restraint layer and mass layer is proposed. Modal tests show that it is effective in damping multiple modes. Finally

it is applied to the five-axis milling of thin-walled S part. Experiments under multiple configurations of cutting parameters show that the vibration amplitude is decreased by 97%.