几种典型相贯线的数学分析

Several typical mathematical analyses of intersect line

相贯线作图是机械制图教学中的难点内容。学习者对相贯线形状缺乏正确的认识是重要原因之一。采用空间解析几何的知识推导出几种典型相贯线的投影方程,并对投影形状进行讨论。

Intersect line drawing is one of the most difficult parts in the engineering drawing teaching.The lack of correct understanding of the shape of intersect line of the students is one of the reasons that cause that problem.This essay describes several mathematical analysis methods of intersect line by the way of analytic geometry,and mainly discusses the shape of vertical shadow.