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Aiming at the disadvantages of low efficiency and low utilization ratio of NC machine tools which are caused by 2D process, 3D process was explored for the rotor. Firstly, the typical process of rotor was used as a template, then machine tool model, cutting tool model and rotor model were set up. Next, NC programming, virtual machining, program correction were carried on by EdgeCAM and Vericut software. Finally, the 3D process specification as well as the processing video were obtained. The original paper process was compared with the 3D process. The results indicate that the latter clearly shows the whole process of the rotor, which can guide the new staff to complete his tasks and reduce the learning time. So it can greatly improve the efficiency, and reduce production costs. [ABSTRACT FROM AUTHOR]