应用直线辅助投射法解决画法几何中图解问题

Solving graphic problems in descriptive geometry by using line secondary projection

由于在工程图学中 ,用正投影法解决画法几何中的某些度量和定位问题往往很不方便。为了简化作图 ,本文介绍了直线辅助投射法及其在解决一些工程图学问题中的应用。该法具有作图简便、应用范围广的特点。

In engineering drawing, it is always inconvenient for orthographic projection to solve some measurement and orientation problems. In order to simplify drawing, this paper introduced a method of line secondary projection. It has been proved that the presented method is very simple and effective.