本文论述用圆柱体形状测量仪测量圆锥体零件的技术。为了能评价出这类零件的形状误差，本文建立了一种能消除试件相对于测量中心轴的偏心误差和倾斜误差的专门算法，即修正的牛顿－拉弗逊（Newton－Raphson）方法。本文建立的这种算法，在计算精度要求为0．1μm。的情况下，迭代次数一般为2～3次。本文还用透视投影图将这种形状误差表示出来。 This article discusses techniques for measuring cone parts with cylindrical shape meters. In order to evaluate the shape error of this kind of part, a new algorithm called Newton-Raphson is proposed, which can eliminate the eccentricity error and tilt error of the specimen relative to the measurement center axis. This algorithm established in this article, the calculation accuracy requirements of 0.1μm. The number of iterations is generally 2 to 3 times. This article also uses perspective projection diagrams to show this shape error.