首先将加工曲面分片，选取合适的初始点。
The machining surface is divided into some chip and a right initial point is selected at first.
数控铣削加工曲面过程中，刀具的运动轨迹是影响加工质量的一个重要因素。
In the process of CNC milling, movement locus of cutting tool is important influence factor on cutting quality.
只要已知被加工曲面的参数表达式，就可运用点涉法在该曲面上生成非球面刀的数控加工轨迹。
As soon as the parametric representation of the sculptured surface is known, the NC machining path on it is determined for the nonspherical cutters.
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