精镗头回转精度的动态测量是属于“刀具回转型”,目前通常使用捷克机床研究所提出的VUOSO方法。基于同一原理,本文提出“时基显示-线值图示法”来反映动态回转精度,可部分地排除基圆失真误差,又可分辨随机误差,同时也便于计算机处理数据。在评定方法上本文采用LSC即最小二乘方圆圆心来评定,建立了数学模型。 Precision boring head rotation accuracy of the dynamic measurement is a “tool rotary type”, currently used by the Czech Machine Tool Research Institute proposed VUOSO method. Based on the same principle, this paper presents a “time base display - line graphic representation” to reflect the dynamic rotation accuracy can be partially ruled out the base circle distortion error, but also to resolve random errors, but also easy to computer processing data. In the assessment method, this paper adopts LSC, which is the center of the least squares circle, to evaluate and establish the mathematical model.