An Approach to Investigate Dynamic Parameters of Bearings Joint Surfaces Based on the SDOF System

Abstract:

As commonly supporting parts of the spindle and the feed systems on the high-end grade CNC machine tool, the dynamic characteristics of angular contact ball bearings had been a research hot spot in the current. Aiming at solving the problem that obtained dynamic stiffness and damping of angular contact ball bearings, an approach to investigate dynamic parameters of bearings joint surfaces was proposed based on the single degree of freedom (SDOF) system, and several groups of modal testing were carried out. The dynamic characteristics of bearings joint surfaces were viewed as several viscoelastic units of spring and damper. Then, models of bearings dynamic parameters in the axial and radial directions were established, and several groups of modal simulation were carried out. The comparison of experiment and simulation results showed that the proposed approach could accurately identify dynamic stiffness and damping of bearings under different load conditions, and the errors were controlled within 7.6%.

• Periodical: Applied Mechanics and Materials (Volume 470)
• Pages: 504-509
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.470.504
• Online since: December 2013
• Authors: Lian Bao Wang*, Xiao Qiu Hu, Xiang Long Dong
• Keywords: Angular Contact Ball Bearings, Damping, Dynamic Stiffness, Joint Surface

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