在我厂承揽的某钢铁公司大型设备配件生产过程中，遇到了一批细长轴的加工，直径从80～13Omm，长度由270～6549mm不等。以如图1所示的传动轴为代表，在普通车床上加工，其表面粗糙度、尺寸精度和几何精度等都很难达到设计要求。为解决这一工艺难题，我们采取在通常精车后安排一 In the process of manufacturing large equipment parts of a steel company that our factory has contracted, we have encountered a series of slender shafts with diameters of 80 ~ 130mm and lengths of 270 ~ 6549mm. As shown in Figure 1 as the representative of the drive shaft, the ordinary lathe processing, the surface roughness, dimensional accuracy and geometric accuracy are difficult to meet the design requirements. To solve this process problem, we take one after the usual fine car arrangement