미소직선 공구경로의 NURBS 변환

다국어 초록 (Multilingual Abstract)

NURBS (Non Uniform Rational B-Spline) is widely used in CAD system and NC data for high speed<br/>
machining. Conventional CAM system changes NURBS surface to tessellated meshes or Z-map model, and<br/>
produces linear tool path. The linear tool path is not good for precise machining and high speed machining. In<br/>
this paper, an algorithm to change linear tool path to NURBS one was studied, and the machining result of<br/>
NURBS tool path was compared with that of linear tool path. The N-post, post-processing and virtual<br/>
machining software was developed. The N-Post post-processes linear tool path to NURBS tool path and<br/>
quickly shades machined product on OpenGL view and compares a machined product with original CAD<br/>
surface. A virtual machined model of original tool path and post-processed tool path was compared to original<br/>
CAD model. The machining error of post-processed NURBS tool path was reduced to 43%. The original tool<br/>
path and NURBS tool path was used to machine general model using same machine tool and machining<br/>
condition. The machining time of post-processed NURBS tool path was reduced up to 38%.

목차 (Table of Contents)

• Abstract
  
• 1. 서론
  
• 2. NURBS 변환
  
• 3. 가상가공 시스템
  
• 4. NURBS 가공 오차
  
• 5. NURBS 가공 시간
  
• 6. 결론
  
• 참고문헌