滚珠丝杠副静力学特性分析

摘要

Based on the Hertz Contact Theory, the mathematical model of the ball screw's axial contact deformation and stiffness is established considering the factor of lead angle and using traversal method to calculate the dimensionless contact displacement. The calculation results show that the axial contact deformation of double nut ball screw than nut ball screw reduces by 60% , stiffness increases by 80% , increasing the lead angle is helpful to improve the positional accuracy of machine.%以赫兹接触理论为基础,考虑螺旋角的影响,通过遍历法计算量纲为1的接触位移,建立滚珠丝杠副轴向接触变形与刚度的数学模型.计算结果表明:双螺母滚珠丝杠副的轴向接触变形量比单螺母的减小60％,刚度提高80％,增大螺旋角,有利于提高机床进给系统的定位精度.