生产一线对机械零件圆柱度的测量一直没有新的进展,所采用的方法不论是两点法或三点法,都由于受圆柱度误差棱数的影响,仅限于对零件圆柱度误差作大致的判断。借助工程软件pro/Engineer的仿真优化模块,对偏角三点法测量圆柱度误差进行了研究,得出了圆柱度误差的棱数、最佳偏角值和放大比之间的关系。 There is no new progress in measuring the cylindricality of the mechanical parts in the production line. The methods adopted are the two-point method or the three-point method, which are all affected by the error of the cylinder degree and are limited to the approximate error of the cylindricality of the part judgment. With the aid of the simulation software of Pro / Engineer, the error of cylindricity measured by the three-point declination method was studied. The relationship between the number of edges, the optimum declination value and the magnification ratio was obtained.