| Summary: | 碩士 === 國立中興大學 === 機械工程學系 === 90 === The purpose of this study was to develop a new theoretical model that can be used to generate the tool-path for any user-defined contour with islands.
For arrangement of entities, an originally special method was proposed and used to find a point inside the profile, which can help to determine the cutting direction along the profile automatically. For offset processing, the voronoi diagram was used to produce degenerative point. By comparing the offset of the line segment with the distance to degenerative point, whether the line segment after offsetting should be degenerated out or not can then be decided. And hence the included angle of two entities can be used to decide the way of connecting. As to the elimination of overcutting, an intuitive and versatile method was proposed to lessen the complexity in using the method interference index.
Besides, a direction-parallel machining approach was adopted to generate the tool-path. Through the tool-path simulation, unnecessary bugs can then be avoided before NC encoding. Finally, four cases were presented in this study to verify the correctness and feasibility of this approach for practical application.
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