The combination of sliding/rolling motion can influence the degree of precision degradation of ball screw. Precision degradation modeling and factors analysis can reveal the evolution law of ball screw precision. This paper presents a precision degradation model for factors analysis influencing precision due to mixed sliding-rolling motion. The precision loss model was verified through the comparison of theoretical models and experimental tests. The precision degradation due to rolling motion between the ball and raceway accounted for 29.09% of the screw precision loss due to sliding motion. Additionally, the total precision degradation due to rolling motion accounted for 21.03% of the total sliding precision loss of the screw and nut, and 17.38% of the overall ball screw precision loss under mixed sliding-rolling motion. In addition, the effects of operating conditions and structural parameters on precision loss were analyzed. The sensitivity coefficients of factors influencing were used to quantitatively describe impact degree on precision degradation.

滑动/滚动运动的组合会影响滚珠丝杠的精度下降程度。精度退化建模和因素分析可以揭示滚珠丝杠精度的演变规律。本文提出了一种精密降级模型，用于影响混合滑动运动的精度的因素分析。通过理论模型和实验测试的比较，验证了精度损失模型。滚珠与滚道之间的滚动运动引起的精度下降占滑动运动引起的螺杆精度损失的29.09％。另外，由于滚动运动而导致的总精度下降占螺杆和螺母的总滑动精度损失的21.03％，以及在混合滑动-滚动运动下总的滚珠丝杠精度损失的17.38％。此外，分析了工作条件和结构参数对精度损失的影响。用影响因素的敏感性系数定量描述对精度下降的影响程度。