关键词: 装配顺序规划, 计算机辅助工艺规划, 三维空间分析, 几何约束, 方向包围盒, 分离轴定理

Abstract: Aiming at the 3D spatial assembly sequence reasoning problem, a 3D-Geometry Constraints Analysis (GCA) method was proposed. Integrated with the Oriented Bounding Box (OBB) and Separation Axis Theory, the assembly GCA method was extended to be able to solve the 3D assembly problems. Accordingly, the corresponding computer-aided analysis system was developed and illustrated by a case study. The analysis results demonstrated that the 3D-GCA method was able to deduce the 3D Assembly Precedence Relations（APRs）and the geometric feasible assembly sequences correctly and completely.

Key words: assembly sequence planning, computer aided process planning, 　3D spatial analysis, geometry constraints, oriented bounding box, separation axis theory