Design and tests of viscous damper for thin-walled parts

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (7) : 68-73.

CHEN Tiantian1, LI Daojing1, ZHANG Suyan2, LIU Zheng2, YANG Yiqing1

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Abstract

Chatter tends to occur during milling process of thin-walled parts due to its poor stiffness. Owing to the rapidly removal of materials, the quick changes in dynamic characteristics results in variable cutting stability. The current research focuses on the passive vibration suppression technology based on the principle of viscous damping in order to increase the damping of thin-walled parts and improve cutting stability. By taking air as an example as the filling medium, the modal test and excitation experiment of the designed damper are carried out. Modal tests show that the damper can significantly improve the damping of thin-walled parts. The vibration peak is reduced by about 60%, and the effect on the suppression of multi vibration modes is observed. The results of the excitation experiment show that the acceleration of thin-walled cylinder parts decreases by 36%-67%.

Key words

thin-walled workpiece / milling / damping / viscous damping

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CHEN Tiantian1, LI Daojing1, ZHANG Suyan2, LIU Zheng2, YANG Yiqing1. Design and tests of viscous damper for thin-walled parts[J]. Journal of Vibration and Shock, 2022, 41(7): 68-73

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