機械系CADのための設計資料グラフおよびテーブル活用支援の一手法

概要

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In automated search of a design database to support mechanical design, it is necessary to recognize a shape pattern which represents a design object. This paper introduces the concept of d surface relation graph (SRG) for recognizing shape patterns from a 3D boundary representation scheme of a solid object (a B-rep model). In SRG, the nodes and arcs correspond to the faces and edges shared by two adjacent faces, respectively. An attribute assigned to an arc is given by an integer which discriminates the relationship between two adjacent faces. The +sign of the integer represents the geometric convexity of the solid, and the -sign the concavity at the shared edge. The input shape is recognized by comparison with the predefined features which are subgraphs of the SRG. A hierarchy of the database for supporting the design is presented. A search for the design database is also discussed. The usefulness of this method is illustrated by some application results.
社団法人日本機械学会の論文
1992-12-25