On the computational geometry of pocket machining
On the computational geometry of pocket machining
A generic solution to polygon clipping
Communications of the ACM
An efficient automatic tool path generator for 2 1/2 D free-form pockets
Computers in Industry
Computational geometry in C (2nd ed.)
Computational geometry in C (2nd ed.)
IGB-offset for plane curves—loop removal by scanning of interval sequences
Computer Aided Geometric Design
Rapid Prototyping and Manufacturing: Fundamentals of StereoLithography
Rapid Prototyping and Manufacturing: Fundamentals of StereoLithography
High Performance Machining for Die/Mold Manufacturing - R&D in Progress
SSM '98 Proceedings of the IFIP TC5 WG5.3 International Conference on Sculptured Surface Machining
A unified method for invalid 2D loop removal in tool-path generation
Computer-Aided Design
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Precision z-level contour machining is important for various computer-aided manufacturing (CAM) applications such as pocket machining and high-speed machining (HSM). This paper presents a new z-level contour tool-path generation algorithm for NC machining of triangulated surface models. Traditional approaches of z-level machining rely on the creation of accurate CL (cutter location) surfaces by surface offsetting or high-density z-map generation, which is computationally expensive and memory demanding. In contrast, this paper presents a novel approach to the generation of CL data directly from the section polygon of a triangulated surface model. For each polygon vertex of the contour, the offset direction is determined by the normal to the edge, while the offset distance is not fixed but is determined from the cutter shape and the part surface. An interference-free tool-path computation algorithm using fillet endmills is developed. Since there is no need to create a complete CL surface or high-density z-map grids, this proposed method is highly efficient and more flexible, and can be directly applied to triangulated surfaces either tessellated from CAD models, or reconstructed from 3D scanned data for reverse engineering (RE) applications.