有公共对称平面的回转面交线分析及计算机绘图

The analysis and CAD of rotative surface's intersects with common symmetric plane

通过对有公共对称平面的回转面交线进行分析 ,提出用三点定义二次圆锥曲线 ,确定其投影曲线方程。用高级语言编程实现该类交线在交互软件中的准确绘制。所绘交线与理论形状的投影作图十分接近 ,可以满足工程制图的要求。

By the analysis of the intersection of rotative planes with common symmetric planes, a conclusion is drawn that three points can define the quadratic conical equation of the projection and then the exact draft of these kinds of intersecting lines can be done in the interactive software by high-level programming language. The drawn intersecting line is similar to the shape of its theoretical projection and can satisfy the require ment of engineering drawings.