Design and experiment of a broadband vibration-damping turning tool with a built-in dynamic vibration absorber

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (18) : 338-344.

ZHANG Minghua1, YANG Guoqing2, YANG Yiqing2,3, GAO Haoyang2, WANG Guangping4

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Abstract

There are lots of deep hole features in aviation structural parts, so large aspect ratio turning tools are needed in machining. With the increase of overhang, the stiffness of cutting tool drops sharply, which leads to intense vibration and restricts the improvement of machining efficiency and precision. Based on the dynamic modeling of the tool bar with continuous beam theory, the prediction method of frequency response function of the bar-absorber coupling system is studied. Combining with the engineering practice, a broadband vibration-damping turning tool with dynamic vibration absorber is designed. Modal experiments show that the frequency adjustment range of the built-in vibration absorber is 365 Hz-442 Hz. The dynamic stiffness of vibration damping turning tool is increased by 104.1% and 120.3%, and the damping ratio is increased by 143.5% and 175.6%. Experiments show that the amplitude of machining noise and acceleration decrease by 42% and 38% on average.

Key words

turning tool / vibration control / vibration absorber / damp

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ZHANG Minghua1, YANG Guoqing2, YANG Yiqing2,3, GAO Haoyang2, WANG Guangping4. Design and experiment of a broadband vibration-damping turning tool with a built-in dynamic vibration absorber[J]. Journal of Vibration and Shock, 2023, 42(18): 338-344

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