车削刀具可以是精车刀具 或粗车刀具。粗车刀具刀尖半径较小，用 于深切削。
Turning tools. Turning tools can be either finishing or rough turning tools. Rough turning tools have small nose radii and are employed when deep cuts are made.
数控车削加工顺序一般按先粗后精，先远后近的原则确定。
The numerical control turning processing order is generally determined according to the principle, first rough then essence, first far then near.
介绍了一种新颖的粗车自动循环加工控制软件的设计方法，利用这种方法控制软件不必进行大量繁琐的数值计算，即可实现车削循环控制，达到高效高速的目的。
The paper analyses the NC cycle machining in several aspects, such as the efficiency and application of the NC procedure, and gives some practical examples in NC programming.
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