To meet the urgent requirement of enterprises for three-dimensional (3D) process models, an approach based on subgraph isomorphism is proposed to solve the matching problem between precursory 3D process model and 2D working procedure drawings. First, the projection drawings of the precursory 3D process model are obtained, then the primitives are extracted and the attributed adjacency graph (AAG) is constructed. Finally, by taking the 2D working procedure drawing as the AAG, and the projection drawing as the whole AAG, the matching problem between precursory 3D process model and 2D working procedure drawings is translated into the problem of subgraph isomorphism. To raise the matching efficiency, the AAG is partitioned, and the vertexes of the graph are classified effectively using the vertex’s attributes. Experimental results show that this method is able to support exact match and the matching efficiency can meet the requirement of practical applications.
基于模型的定义(Model Based Definition,MBD)技术是数字化设计与制造领域的新趋向,提出一种基于MBD的零件制造模型的管理方法。首先深入分析了MBD体系下面向工艺链的零件制造模型的构成及特点;在此基础上,针对人员、节点和流程管理三要素,建立了零件制造模型的管理方法。最后以产品数据管理系统为平台建立了集成的管理应用。该方案能进一步提高企业的数字化制造能力。
