A dynamic model and stability of cutting tools with varying stiffness and damping in the deep-hole drilling process

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (16) : 190-197.

KONG Lingfei,CHEN Bo,WANG Jie,CUI Bo

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Abstract

Considering the practical layout of tool systems in deep-hole drilling, a drilling system model with varying stiffness and damping support was proposed, which includes a gyroscopic effect and regenerative chatter.Relying on the Euler-Bernoulli beam theory and the transfer matrix method, some important locally-designing information in detail could be considering, such as the intermediate support, oil supply device and cutting tool parameters.A series of experimental investigations was carried out to confirm the accuracy and effectiveness of the dynamic model proposed in this paper.Based on the aforementioned content, the dynamic stability features based on conditions of various drilling depths, tool rotation speeds and electric currents applied were obtained, and the effect of intermediate support with varying stiffness and damping was validated in the phenomenon of lobe suppression.These relevant results built a solid foundation for predicting and targeting active control of vibration behaviors in the deep-hole machining process.

Key words

Deep hole drilling / Vibration suppression / Varying stiffness and damping / System modeling / Stability

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KONG Lingfei,CHEN Bo,WANG Jie,CUI Bo . A dynamic model and stability of cutting tools with varying stiffness and damping in the deep-hole drilling process[J]. Journal of Vibration and Shock, 2018, 37(16): 190-197

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