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

摘要: 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.

Abstract: 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.