Paper shows the characteristics of CNC machining, spare parts during processing of the process to develop a reasonable NC process planning.
论文显示了数控加工特点，零件在加工过程中的工艺性，制定出合理的数控工艺规划。
This system can recognize the features automatically and make process planning with human-computer interaction, and then generate STEP-NC program.
该系统可进行自动特征识别，经人机交互方式进行工艺规划，最终生成STEP-NC数控程序。
Using this method, the post-machining inner surface is obtained, and it makes the cutting locus planning in NC machining process possible.
在此基础上得到加工后内廓曲面，为数控加工中刀具轨迹的规划奠定了基础。
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