Abstract
The dynamic characteristics of linear rolling guide joint have great influence on the dynamic characteristics of machine tools. In this paper, the relative deformation of guide interface was analyzed based on Hertz theory and normal contact stiffness of guide joint was calculated first. Then, the vibration model of linear rolling guide joint was performed. The kinetic energy and potential energy of carriage-rail system was derived. Based on Lagrange’s approach, motion equilibrium equations of different vibration modes were derived. At last, vibration test was designed to get natural frequencies and mode shapes of the carriage. The natural frequencies agreed well with the values calculated by analytical approach. The research results provided a theoretical foundation for obtaining vibration characteristics parameters of linear rolling guide joint and a reliable way for analysis of the dynamic characteristics of similar machine joints
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