Abstract

This paper describes one method of reverse engineering that machines a free form shape without descriptive model. A portable five-axes 3D CMM was used to digitize point data from physical model. After approximation by rational B-spline curve from digitized point data of a geometric shape, a surface was constructed by the skinning method of the cross-sectional design technique. Since a surface patch was segmented by fifteen part, surface merging was also implemented to assure the surface boundary continuity. Finally, composite surface was transferred to commercial CAD/CAM system through IFES translation in order to machine the modeled geometric shape.

Keywords

• Reverse Engineering;
• Physical model;
• Digitize;
• Approximation;
• Rational B-Spline Curve;
• Skinning

• 역공학;
• 실물모형;
• 디지타이즈;
• 근사;
• 유리 B-Spline 곡선;
• 스키닝;