OpenCASCADE를 이용한 CAD 모델의 오류 진단 시스템의 개발

초록

Automotive engineers involved in a new car project use various CAD systems that are chosen based on work requirements. For example, engineers in Hyundai Motors are using Pro/Designer and Alias for the style design, but they use CATIA to design parts and assemblies, ANSYS for FEM analysis, and Pro/Engineer to design en­gines. Because they use different CAD systems, they have difficulties in collaborative design. Data, which con­tains errors, is transferred between CAD systems. It is difficult to find out such errors in a large CAD model. An evaluation method for CAD models has been developed in this study. This diagnosis tool analyses a STEP or an IGES file generated from a CAD system, and produces a quantitative error report. The tool has been tested with actual data sets. This paper proposes an algorithm that produces mathematical error values of entities of IGES models that have geometrical data, and entities of STEP models that have topological data, and inspects every part of a model. To develop this system, we have used the OpenCASCADE kernel, which is an open source ker­nel developed by Matra Datavision of France.

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