《机床与液压》 Hydromechatronics Engineering

文章详情

稿件标题: Modal and harmonic response analysis of spindle system on CNC worm wheel gear grinding machine
稿件作者: 牟红刚, 张金泉, 许祥根, 陈烨
关键字词: Spindle system; Modal analysis; Harmonic response analysis; Resonance vibration; Critical speed
文章摘要: Based on the characteristics of simple harmonic vibration of CNC worm wheel gear grinding machine in the process of grinding, a three-dimensional finite element model of the spindle system was established. Modal analysis and harmonic response analysis were carried out through finite element software ANSYS. The natural frequencies and modes of the spindle system were obtained by the modal analysis. The effect of supporting stiffness of ball bearings to the natural frequencies was evaluated. The deformation-frequency response curve was obtained by analyzing the harmonic response of the spindle system. Lastly, the resonance vibration was verified by the critical speed. The results showed that the increasing supporting stiffness of the ball bearing was conducive to the improvement of the spindle system's natural frequencies. When the frequency of grinding exciting force was in the vicinity of 600 Hz, deformation-frequency response curve showed a peak response to 6.56 . In order to avoid resonance vibration, the operating speed of the spindle system should avoid the first-order critical speed.
收录刊物: 2014.12
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