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| A dynamic model and stability of cutting tools with varying stiffness and damping in the deep-hole drilling process |
| KONG Lingfei,CHEN Bo,WANG Jie,CUI Bo |
| 1. Key Laboratory of Shanxi Mechanical Equipment, Xi’an University of Technology, Xi’an 710048, China |
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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.
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Received: 27 June 2017
Published: 15 August 2018
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