4.4 Process analysis of rotational parts,4.4.1 Typical parts machined by CNC machine tools,4.4.2 machining of complicated parts,4.4.3 Process analysis of the spindle of CA6140,表4.11 CA6140型车床主轴加工工艺过程简表,粗加工阶段,半精加工,Application of the basic rules in process planning,classification of process phases rough machining, self-finish machining finish machining selection of reference surface Principle of locating datum surfaces unchangeable Principle of coincident locating surfaces Principle of being datum