Development of Digital 3D Real Object Duplication System and Process Technology

디지털 3차원 실물복제기 시스템 및 공정기술 개발

  • 이원희 (한국기계연구원 정보장비연구센터) ;
  • 안영진 (한국기계연구원 정보장비연구센터) ;
  • 장민호 ((주)솔루션닉스) ;
  • 최경현 (제주대학교 기계에너지시스템공학부) ;
  • 김동수 (한국기계연구원 정보장비연구센터)
  • Published : 2006.04.01

Abstract

Digital 3D Real Object Duplication System (RODS) consists of 3D Scanner and Solid Freeform Fabrication System (SFFS). It is a device to make three-dimensional objects directly from the drawing or the scanning data. In this research, we developed an office type SFFS based on Three Dimensional Printing Process and an industrial SFFS using Dual Laser. An office type SFFS applied sliding mode control with sliding perturbation observer (SMCSPO) algorithm for control of this system. And we measured process variables about droplet diameter measurement and powder bed formation etc. through experiments. In case of industrial type SFFS, in order to develop more elaborate and speedy system for large objects than existing SLS process, this study applies a new Selective Dual-Laser Sintering (SDLS) process and 3-axis Dynamic Focusing Scanner for scanning large area instead of the existing f lens. In this process, the temperature has a great influence on sintering of the polymer. Also the laser parameters are considered like that laser beam power, scan speed, and scan spacing. Now, this study is in progress to evaluate the effect of experimental parameters on the sintering process.

Keywords

References

  1. Terry, T. Wohlers, 'Wohlers Report 2003,' Wholer Associates, 2003
  2. Paul, A. Williams, 'A New Process To Fabricate Prototypes Directly From CAD Model,' PhD. Thesis, MIT, pp. 2-3, 1990
  3. Kim, J. S.'The Control of SFFS in the Office Environment and It's Integration,' PNU M.S Thesis, pp. 35-39. 2004
  4. Lee, W. H., Kim, D.S. and Lee, M.C., 'Development of a SFF System Based on Three Dimensional Printing Process,' Korean CAD/CAM conference, 2005
  5. James, C.N., 'Selective Laser Sintering: A Definition of the process and an Empirical Sintering Model,' PhD Thesis, The Univ. of Texas at Austin, May 1993
  6. John, D.W. and Carl, R.D., 'Advances in Modeling the Effects of Selected Parameters on the SLS process,' Rapid Prototyping Journal, Vol 4, pp.90-100, 1998 https://doi.org/10.1108/13552549810210257
  7. Benda, J., 'Temperature Controlled Selective Laser Sintering,' Proceeding of the Solid Freeform Fabrication Symposium, Univ. of Texas at Austin, TX, Vol.5, pp.277-284, 1994
  8. Festa, R., Manca, O. and Naso, V, 'A Comparison between Models of Thermal Fields in Laser and Electron Beam Surface Processing,' International Journal of Heat and Mass Transfer, Vol.31, pp.99-106, 1998
  9. Badrinarayan, B., 'Study of the Selective Laser Sintering of Metal-polymer powders,' PhD Thesis, The Univ. of Texas at Austin, December, 1995
  10. Chang, M.H., Yoo, H.W., 'Development of measurement path setting automation techniques for Full 3D automated measurement,' Papers collection from 2nd Digital 3D Real Object Duplication System(RODS) Development Workshop, Korea Institute of Machinery and Materials, 2004
  11. Miller, D., Deckard, C. and Williams, J., 'Various beam size SLS workstation and enhanced SLS model,' Rapid Prototyping Journal, Vol.3, No.1, pp4-11, 1997 https://doi.org/10.1108/13552549710169237
  12. Chua, C. K., Leong, K. F. and Lim, C. S., 'Rapid Prototyping: Principles and Applications,' World Scientific Publishing, 2nd Edition, 2003
  13. Chen, K., 'INTELLIGENT SCANNING IN SELECTIVE LASER SINTERING' The Univ. of Texas at Austin, Ph. D. Thesis, 1998
  14. Kim, D.S., Lim, H.E. and Kim, S.J., 'A Study on the industrial type SFPS using SLS Process,' KSPE Fall conference, pp.1299-1302, 2004