頑健なブレンド処理のための境界表現の拡張に関する研究（第2報） : − 一般の終端問題，面線ブレンド問題および大域問題への対応−

概要

論文の詳細を見る
A solid model representing a product requires filleting or blending, which rounds a specified edge or vertex, in order to make a production model for manufacturing purpose such as mould die model. Many research algorithms for blending have been proposed and commercial CAD/CAM system vendors have implemented blend functions for their systems, however, the practicing users of CAD/CAM systems in the manufacturing industry are suffering from the inability of current blending functions, such as some “holes” in the solid models because of the failure of the blending. It is regarded that the current major solid model structure, the Boundary-Representation (B-rep) lacks the sufficient structure for making robust blending surfaces. In this research, several additional conditions for the B-rep that includes “extended surfaces” that make the blending algorithm simple and robust are proposed. In this report, it is shown that the proposed conditions are effective in the general termination case of edge blending. It is also shown that proposed approach can be applicable to the face-edge blending problem and global blending problem. Several examples are shown to verify the effectiveness of the proposal.