Browse > Article

Surface Reconstruction for Cutting Path Generation on VLM-Slicer  

Lee, Sang-Ho (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
An, Dong-Gyu (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Yang, Dong-Yeol (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Journal of the Korean Society for Precision Engineering / v.19, no.7, 2002 , pp. 71-79 More about this Journal
Abstract
A new rapid prototyping process, Variable Lamination Manufacturing using a 4-axis-controlled hotwire cutter and expandable polystyrene foam sheet as a laminating material of the part (VLM-S), has been developed to reduce building time and to improve the surface finish of parts. The objective of this study is to reconstruct the surface of the original 3D CAD model in order to generate mid-slice data using the advancing front technique. The generation of 3D layers by a 4 axis-controlled hot-wire cutter requires a completely different procedure to generate toolpath data unlike the conventional RP CAD systems. The cutting path data for VLM-S are created by VLM-Slicer, which is a special CAD/CAM software with automatic generation of 3D toolpath. For the conventional sheet type system like LOM, the STL file would be sliced into 2D data only. However, because of using the thick layers and a sloping edge with the firstorder approximation between the top and bottom layers, VLM-Slicer requires surface reconstruction, mid-slice, and the toolpath data generation as well as 2D slicing. Surface reconstruction demands the connection between the two neighboring cross-sectional contours using the triangular facets. VLM-S employs thick layers with finite thickness, so that surface reconstruction is necessary to obtain a sloping angle of a side surface and the point data at a half of the sheet thickness. In the process of the toolpath data generation the surface reconstruction algorithm is expected to minimize the error between the ruled surface and the original parts..
Keywords
VLM-Slicer; Cutting path; Surface Reconstruction; Advancing Front Technique;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 J. Park, M. J. Tari and H. T. Hahn, 'Characterization of the Laminated Object Manufacturing(LOM) Process,' Rapid Prototyping Journal, Vol. 6, No. 1, pp. 36-49, 2000   DOI   ScienceOn
2 P. F. Jacobs, Stereolithography and other RP&M Technologies from Rapid Prototyping to Rapid Tooling, ASME Press, 1996
3 P. Kullkarni, A. Marsan, D. Dutta, 'A review of process planning techniques in layered manufacturing,' Rapid Prototyping Journal, Vol. 6, No. 1, pp. 18-35, 2000   DOI   ScienceOn
4 Y. Zheng, S. Choi, B. Mathewson and W. Newman, 'Progress in Computer-Aided Manufacturing of Laminated Engineering Materials Utilizing Thick,Tangent-Cut Layers,' Solid Freeform Fabrication Symposium, pp. 355-362, 1996
5 I. Cho, K. Lee, W. Choi and Y. A. Song, 'Development of a new sheet deposition type rapid prototyping system,' I. J. of Machine Tools & Manufacture, Vol. 40, pp. 1813-1829, 2000   DOI   ScienceOn
6 R. L. Hope, P. A. Jacobs and R. N. Roth, 'Rapid Prototyping with Sloping Surfaces,' Rapid Prototyping Journal, Vol. 3, No. 1, pp. 12-19, 1997   DOI   ScienceOn
7 '선형 열전단 시스템을 이용한 가변 적층 쾌속 조형방법 및 쾌속조형장치,' 국내특허, 특허 출원 번호 제2000-18175호, 2000
8 A. Novc, S. Kaza, Z. Wang and C. Thomas, 'Techniques for Improved Speed Accuracy in Layered Manufacturing,' Solid Free Fabrication Sympoium Proceedings, pp. 609-617, 1996
9 T. Mueller, 'Tutorial, Fundamentals of Rapid Prototyping,' Tom Mueller Express Pattern Co., 2000
10 이상호, 김태화, 안동규, 양동열, 채희창, '가변 적층 쾌속 조형공정 개발을 위한 단위형상조각 자동 생성 소프트웨어 개발 및 적용 예,' 한국정밀공학회지, 제 18 권, 제 8호, pp. 64-70, 2001
11 E. Keppel, 'Approximating complex surfaces by triangulation of contour lines,' IBM Journal of research and development, Vol. 19, No. 1, pp. 2-11, 1975   DOI
12 '선형 열전단 시스템을 이용한 단속적 재료 공급식 가변적층 쾌속조형 공정 및 장치,' 국내특허, 특허 출원 번호 제2001-0040212호, 2001
13 안동규, 이상호, 양동열, 신보성, 박승교, 이용일, '발포 폴리스티렌 폼을 이용한 가변 적층 쾌속 조형 공정 및 장치 개발,' 한국정밀공학회지, 제 18권, 제 8 호, pp. 54-63, 2001   과학기술학회마을
14 C. K. Lee and R. E. Hobbs, 'Automatic adaptive finite element mesh generation over arbitrary two dimensional domain using advancing front technique,' Computers and Structures, Vol. 71, pp. 9-34, 1999   DOI   ScienceOn
15 P.L. George, Automatic Mesh Generation, John Wiley & Sons, 1991, pp. 137-158