摘要
基于微机三维计算机辅助设计（ＣＡＤ）系统，针对三维约束装配的过程，阐述了约束装配过程中零件引用、引用顺序、施加装配约束、装配分析、装配编辑修改、二维装配图生成的主要技术．
Basing on three dimensional CAD system on PC, this paper illuminated the main technology in the course of constrain assembly, that includes instancing part, instancing order, applying assembly constraints, analysing assembly editing assembly, creating assembly drawing views.
