頂点オフセットによる三角形メッシュのシェリング : 光造形データ作成への応用

概要

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Rapid prototyping technologies have been used in the manufacturing industry. They are particularly useful for evaluating aesthetic characteristics of product surfaces designed by CAD systems. In such situation, it is often the case that the geometric model represents only the outer shape and does not have the inside shape. Consequently the inside of the physical prototype generated using such geometric model is just filled up with material. It is wasteful with regard to manufacturing time and material volume. The aim of this research is to make a cavity by generating an inner shell geometry based on the outer surface in order to eliminate such unnecessary volume. This operation is called "shelling". It can be performed by offsetting surfaces. However, it requires complex surface intersections. This algorithm adopts vertex offsetting which is simpler and may be robust. It is shown using some examples, that shelling is useful for reducing shaping time and material volume.
公益社団法人精密工学会の論文
1998-06-05