通过叶盘叶片偏置面的直纹包络面逼近，确定叶盘通道粗加工区域，给出了四坐标插铣刀位轨迹生成算法。

The rough milling region of the open blisk tunnel is determined by generating the ruled envelope surface of the blades offset surface, and the algorithm.

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改变正前角成形铣刀只能用作粗加工的观念，可将正前角成形铣刀用于成形面的精加工。

The conception that the form-milling cutter can only be used to rough finish the workpiece should be changed. This kind of form-milling cutter can also be used to finishing-machine workpiece.

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该循环可以用于粗加工和精加工。 在精加工时要求一个端面铣刀。

You can mill a optional rectangular plane by using CYCLE71.

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