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쾌속조형의 속도를 향상시키기 위한 알고리즘
An Algorithm to Speed Up the Rapid Prototyping

고민석   (아주대학교 산업공학과 대학원UU0000892  ); 장민호   (단국대학교 기계공학과UU0000336  ); 왕지남   (아주대학교 산업공학과UU0000892  ); 박상철   (아주대학교 산업공학과UU0000892  );
  • 초록

    While developing physical prototype from CAD model, rapid prototyping mainly focuses on two key points reducing time and material consumption. So, we have to change from a traditional solid model to building a hollowed prototype. In this paper, a new method is presented to hollow out solid objects with uniform wall thickness to increase RP efficiency. To achieve uniform wall thickness, it is necessary to generate internal contour by slicing the offset model of an STL model. Due to many difficulties in this method, this paper proposes a new algorithm that computes internal contours computing offset model which is generated from external contour using wall thickness. Proposed method can easily compute the internal contour by slicing the offset surface defined by the sum of circle swept volumes of external contours without actual offset and the circle wept volumes. Internal contour existences are confirmed by using the external point. Presented algorithm uses the 2D geometric algorithm allowing RP implementation more efficient. Various examples have been tested with implementation of the algorithm, and some examples are presented for illustration.


  • 주제어

    쾌속 조형 .   속비움 .   균일한 벽 두께 .   원 자취 부피 .   2D 커브 오프셋.  

  • 참고문헌 (16)

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    3. Li, C. L., Yu, K. M. and Lam, T. W., "Implementation and evaluation of thin-shell rapid prototype," Computers in Industry, Vol. 35, Issue 2, pp. 185-193, 1998 
    4. Alexander, P. and Dutta, D., "Layered manufacturing of surfaces with open contours using localized wall thickening," Computer-Aided Design, Vol. 32, No. 3, pp. 175-189, 2000 
    5. Chiu, W. K. and Tan, S. T., "Using dexels to make hollow models for rapid prototyping," Computer-Aided Design, Vol. 30, No. 7, pp. 539-547, 1998 
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    7. Choi, B. K. and Park, S. C., "A pair-wise offset algorithm for 2D point-sequence curve," Computer-Aided Design, Vol. 31, No. 12, pp. 735-745, 1999 
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    12. Ganesan, M. and Fadel, G., "Hollowing rapid prototyping parts using offsetting techniques," in: Proceedings of the 5th International Conference on Rapid Prototyping, pp. 10-12, 1994 
    13. Xiuzhi, Q. and Brent, S., "A 3D surface offset method for STL-format models," Rapid Prototyping Journal, Vol. 9, No. 9, pp. 133-141, 2003 
    14. Daniel, L. and Anderson, D. L., "Role of Rapid Prototyping in Preoperative Planning and Patient Specific Implant Generation," Biomedical Engineering Conference, Vol. 31, No. 2, pp. 558-559, 1996 
    15. Maekawa, T., "An overview of offset curves and surfaces," Computer-Aided Design, Vol. 31, No. 3, pp. 165-173, 1999 
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