NURBS-based adaptive slicing for efficient rapid prototyping

Abstract This paper presents slicing algorithms for efficient model prototyping. The algorithms directly operate upon a non-uniform rational B-spline surface model. An adaptive slicing algorithm is developed to obtain an accurate and smooth part surface. A selective hatching strategy is employed to further reduce the build time by solidifying the kernel regions of a part with the maximum allowable thick layers while solidifying the skin areas with adaptive thin layers to obtain the required surface accuracy. In addition, it provides a generalization to the containment problem with mixed tolerances for slicing a part. The article also developed a direct method for computing skin contours for all tolerance requirements. Some case studies are presented to illustrate the developed algorithms and the selective hatching and adaptive slicing strategy. The developed algorithms have been implemented and tested on a fused deposition modeling rapid prototyping machine. Both the implementation and test results are discussed in the paper.

[1]  Peter A. Jacobs,et al.  Adaptive slicing with sloping layer surfaces , 1997 .

[2]  Georges Fadel,et al.  Expert system-based selection of the preferred direction of build for rapid prototyping processes , 1995, J. Intell. Manuf..

[3]  Debasish Dutta,et al.  An accurate slicing procedure for layered manufacturing , 1996, Comput. Aided Des..

[4]  Paul F. Jacobs,et al.  Stereolithography and other RP&M technologies , 1996 .

[5]  Zhengyi Yang,et al.  Layer-based machining: Recent development and support structure design , 2002 .

[6]  K. H. Lee,et al.  Generating Optimal Slice Data for Layered Manufacturing , 2000 .

[7]  Jean-Pierre Kruth,et al.  Material incress manufacturing by rapid prototyping techniques , 1991 .

[8]  Les A. Piegl,et al.  The NURBS Book , 1995, Monographs in Visual Communication.

[9]  Sanjay G. Dhande,et al.  Real time adaptive slicing for fused deposition modelling , 2003 .

[10]  André Dolenc,et al.  Slicing procedures for layered manufacturing techniques , 1994, Comput. Aided Des..

[11]  Gill Barequet,et al.  A data front-end for layered manufacturing , 1997, SCG '97.

[12]  Han Tong Loh,et al.  Optimal orientation with variable slicing in stereolithography , 1997 .

[13]  Jan Helge Bøhn,et al.  Accurate exterior, fast interior layered manufacturing , 1997 .

[14]  N. M. Aziz,et al.  A model for interfacing geometric modeling data with rapid prototyping systems , 1995 .

[15]  Ron Jamieson,et al.  Direct slicing of CAD models for rapid prototyping , 1995 .

[16]  Georges M. Fadel,et al.  Efficient slicing for layered manufacturing , 1998 .

[17]  Shuo-Yan Chou,et al.  Determining fabrication orientations for rapid prototyping with Stereolithography apparatus , 1997, Comput. Aided Des..

[18]  Ram D. Sriram,et al.  Progress towards an international standard for data transfer in rapid prototyping and layered manufacturing , 2001, Comput. Aided Des..

[19]  Debasish Dutta,et al.  Region-based adaptive slicing , 1999, Comput. Aided Des..

[20]  Seth Allen,et al.  On the Computation Of Part Orientation Using Support Structures in Layered Manufacturing , 1994 .

[21]  Jan Helge Bøhn,et al.  Adaptive slicing using stepwise uniform refinement , 1996 .

[22]  Zhu Hu,et al.  Determination of optimal build orientation for hybrid rapid-prototyping , 2002 .

[23]  Han Tong Loh,et al.  Considerations and selection of optimal orientation for different rapid prototyping systems , 1999 .

[24]  Jan Helge Bøhn,et al.  Local adaptive slicing , 1998 .

[25]  Denis Cormier,et al.  Specifying non‐uniform cusp heights as a potential aid for adaptive slicing , 2000 .