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通过引入凸轮机构的压力角和凸轮法线长的概念,应用矢量分析的方法,给出了平底摆动从动件凸轮机构的理论凸轮轮廓的矢量方程和考虑凸轮法向误差的实际凸轮轮廓的矢量方程。研究了凸轮轮廓的法向误差与凸轮机构运动精度之间的关系,推导出了从动件摆角、角速度和角加速度误差的计算公式。分析确定了影响从动件摆角、角速度和角加速度误差的主要因素。指出了提高和改善凸轮机构的运动精度和性能的措施和途径,对于设计制造高精度凸轮机构具有重要的指导意义。
By introducing the concept of pressure angle and cam normal length of cam mechanism, the vector equations of the theoretical cam profile of cam mechanism with flat-bottomed oscillating follower and the vector of actual cam profile considering cam normal error are given by means of vector analysis. equation. The relationship between the normal error of the cam profile and the movement accuracy of the cam mechanism is studied, and the formula of the error of the follower ’s swing angle, angular velocity and angular acceleration is deduced. The main factors influencing the error of the follower’s swing angle, angular velocity and angular acceleration were analyzed. The measures and ways of improving and improving the movement accuracy and performance of the cam mechanism are pointed out, which have important guiding significance for the design and manufacture of the cam mechanism with high precision.