本文以有向几何为背景陈述一个微机绘图核心程序包，用它描写数控加工零件的平面外型轮廓，并在微机上绘制各种复杂的平面图形。
In this paper, a core program package related for drawing pictures in micro computers with Oriented Geometry is presented to describe profile of machine parts in numerical control.
本次设计的主要内容是使用华中数控铣床加工典型的零件，包括平面、轮廓、内腔、孔、圆弧等。
The design of the main content is the use of huazhong nc milling machine parts, including the typical planar, outline, the inner chamber, hole, arc, etc.
本文基于刀具路径几何仿真，研究了平面曲线轮廓数控加工进给速度优化技术，这种优化技术是智能化数控加工编程的基础。
The paper presents a systematic technology of feed rate optimization on CNC planar profile milling based on geometric simulation of tool path which is the base of intelligent CNC programming.
最后，应用这种方法进行平面曲线轮廓铣削加工试验，结果证明了这种方法的优越性。
Finally, the approach is applied on an example part for profile milling, and the results prove the advantage of this approach.
目前，大型水轮机金属焊接蜗壳各分节大多采用按各分节平面展开线轮廓进行数控切割加工。
At present, each sectionalization of large-scale spiral case is produced by NC cutting according to the outstretched plane of the curve of the sectionalization.
目前，大型水轮机金属焊接蜗壳各分节大多采用按各分节平面展开线轮廓进行数控切割加工。
At present, each sectionalization of large-scale spiral case is produced by NC cutting according to the outstretched plane of the curve of the sectionalization.
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