Dynamic Analysis and Design of the Spindle-Bearing System in Turn-milling Centre

In order to obtain the accurate dynamic characteristics of spindle-bearing system during the design stage, the spindle-bearing system with finite element model is simulated by virtual software, and a method which springs and damping units imitate bearing support is proposed in this paper. The proposed method can predict the regular pattern which bearing stiffness and bearing span affect natural frequency and harmonic response. The research demonstrates that the method predicts well the dynamic characteristics of the spindle-bearing system; therefore, it can be a reference for dynamic optimization design of spindle-bearing system in turn-milling center.