The Analysis and Research of Movement Precision ofGloboid Cam Based on the Error Modeling
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摘要: 分析影响弧面凸轮机构运动精度的几种误差因素,建立了含误差的弧面凸轮机构啮合的数学模型。采用微分精度分析法求得各误差因素对弧面凸轮机构运动精度的影响系数表达式,通过实例分析了各运动精度影响系数随弧面凸轮转角的变化规律。分析表明:各误差因素对弧面凸轮机构运动精度的影响相同,滚子半径误差对其运动精度的影响最大,轴交角误差对其运动精度的影响最小,啮合点位置对其运动精度的影响最不稳定,各影响系数与弧面凸轮机构基本结构尺寸因素相关。Abstract: :Considering several common errors of Globoidal cam to impact kinematic accuracy,a mathematical model for globoid cam with error was established. By using the differential method,the motion accuracy influence coefficient of the globoid cam was obtained. The change rule of kinematic accuracy influence coefficient with the change of globoid cam angle was analyzed via example. The analysis result shows that different error factors have different influence coefficient. The Radius error of globoid cam impact Maximumly the motion precision,and the Shaft angle error affect Minimumly the movement precision. Meshing position of the globoidal cam mechanism af-fects the kinematic accuracy instability. The influence coefficient of motion accuracy has a certain relationship with the structure factors of globoid cam.
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Key words:
- differential precision analysis method /
- error model /
- errors /
- globoidal cam
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