Masayuki Hariya

Automatic Hexahedral Mesh Generation with Feature Line Extraction

Abstarct. An improved method using feature line extraction is described for automatically generating hexahedral meshes for complex geometric models that automate the normally interactive operations (such as model editing). Testing showed that the time taken for these interactive operations was significantly reduced, making it possible to quickly generate hexahedral meshes with sufficient quality for complex models. Application of this method to mechanical part models showed that it shortened the time to generate a mesh in about 10% the time required with the previous method.

Technique for checking design rules for three-dimensional CAD data

A technique was developed for checking whether three-dimensional CAD shape satisfies design rules. Many design rules related to reliability and manufacturability should be considered in the design stage. Our technique automatically recognizes feature shapes such as a rib and boss from a CAD model shape, and it checks the shape and arrangement. The effectiveness of the technique was demonstrated in a test of the injection-molded part.

Development of support system for providing knowledge from displayed documents

Because knowledge and experience, which are derived from design and analysis in product design, are not always reflected in the design process, product flaws that have previously occurred would reappear. It is necessary to develop a system that provides designers with the knowledge and design rules of a design process. We developed a useful design-information delivery system using running software/documents displayed on the PC monitor. This system extracts search keywords from a design-information database. In a validation test, a designer was warned of vibration and sliding when evaluating the strength of a product.