范成法加工凸轮是一项加工工艺的革新,而加工精度又是衡量加工方法优劣的重要标志之一。为研究范成法的加工精度,本文提出了三种计算砂轮补偿后轮廓误差的方法。即精确计算法,估算法,和多元函数求微分的方法。范成凸轮用砂轮补偿后轮廓误差的计算过程是个较为繁琐的过程。在工程中,为简化计算,本文提议使用估算法。为验正其准确性,本文作者己用另两种方法验证了此种方法。 Fan Chengfa processing cam is a process of innovation, and processing accuracy is to measure the merits of one of the important processing methods. In order to study the processing accuracy of Fancheng method, this paper presents three methods to calculate the contour error after grinding wheel compensation. That is, accurate calculation method, estimation method, and multiple function differentiation method. Fan into the cam with the wheel contour compensation after the calculation of the error is a more complicated process. In engineering, in order to simplify the calculation, this article proposes to use the estimation method. To verify its accuracy, the authors of this paper have validated this method in two other ways.