Abstract
This paper presents a new damping boring bar with a variable stiffness dynamic vibration absorber (VSDVA) based on dynamic vibration absorber theory. The new designed VSDVA is installed in a cavity which is in the front of the damping boring bar. A new vibration reduction method is proposed by adjusting the stiffness of the VSDVA to adapt the different cutting parameters. The dynamic model of the damping boring bar system is established. The influences of the excitation frequency and the overhang length of the VSDVA on the amplitude ratio are discussed, and the optimal curves are obtained. The damping zone and non-damping zone are obtained as well. These analyses provide a theoretical basis for the design of the damping boring bar and the choice of cutting parameters. The proposed damping boring bar is tested with excitation experiments, impact tests, and boring experiments. The results show that the vibration is reduced, which verifies the feasibility of the proposed method. The accuracy of the dynamic model is substantiated by comparing the experimental data with the theoretical data.
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Liu, X., Liu, Q., Wu, S. et al. Research on the performance of damping boring bar with a variable stiffness dynamic vibration absorber. Int J Adv Manuf Technol 89, 2893–2906 (2017). https://doi.org/10.1007/s00170-016-9612-2
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DOI: https://doi.org/10.1007/s00170-016-9612-2