滚动直线导轨副的滚道中心距误差与承载性能的关系

静刚度和摩擦力作为导轨副关键承载性能指标，直接影响导轨副的运动精度及工作状态。基于赫兹接触理论，建立了滚道中心距误差与导轨副摩擦力和静刚度的模型，并结合理论计算模型与控制变量试验研究了导轨、滑块滚道中心距误差及滚珠过盈量对承载性能的影响规律，对比分析了滚道中心距不同误差情况下的摩擦力和静刚度。研究结果表明，静刚度相对误差为2.46%～8.20%，摩擦力相对误差为0.42%～11.33%。理论仿真值和试验实测值的一致性较好。

Relationship of Raceway Center Distance Errors and Load-bearing Performance of Rolling Linear Guide Pairs

Static stiffness and friction, as the key load-bearing performance indicators of rolling linear guide pairs, affected the motion accuracy and operation performance directly. Based on Hertz contact theory, a model of raceway center distance errors, the friction forces and static stiffness of the guide rail pairs was established. The theoretical model and controlled variable tests were combined to analyze the influences of the center distance errors for guide rail raceway, slider raceway and ball interference on the bearing performance for the guide rail pairs. The friction forces and static stiffness under different errors of the raceway center distance were compared and analyzed. The results show that the relative errors of static stiffness are as 2.46%～8.20%, and the relative errors of friction are as 0.42%～11.33%. The theoretical simulation values and the experimental values are in good agreement.