滚珠直线导轨副, 赫兹弹性接触, 弹性梁, 滑块裙部变形, 有限元分析

Based on the Hertzian contact theory and elastic beam theory, a theoretical model of the vertical stiffness of preloaded linear motion guide considering the flexibility of the carriage was established. By comparing the calculated vertical rigidity of the linear motion guide with the measured results proposed in a literature, the effectiveness of the proposed theoretical model was verified. The validation of the side face deformations were verified through FEA. With relative errors less than 3.5%, the calculated outward carriage deformations match the FEA results well. Clearly, the theoretical model can deal with the vertical stiffness of preloaded linear motion guide more accurately compared with the present models.

linear motion guide, Hertzian contact, elastic beam, side face deformation, finite element analysis(FEA)