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Sculptured surfaces subdivision from 3d cloud of points and association of optimum ball cutters

机译：从3D点云和最佳球切割机的关联的雕刻表面细分

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Parts with sculptured surfaces used in molds industry,etc.are machined on multi-axis CNC milling machines.Their final shapes are obtained in three stages: roughing,semi-finishing and finishing.For all stages it is indispensable to determine largest cutters and thus most efficient cutters able to machine these surfaces without gouging and collision.Nowadays,Reverse Engineering is used to reproduce objects where their CAD models are unavailable In this process,the object is digitized to retrieve a set of dense clouds of points.In consequence,there is no relationship between points which makes the determination of optimal cutters more difficult In this paper,for finishing sculptured surfaces on 3-axis CNC milling machines directly from 3D cloud of points,an approach is proposed to partition the cloud of points into distinct regions from estimated points local shapes(concave,convex,plane,concave developable,convex developable,saddle)and then determines the optimal ball cutter for each region avoiding interferences.For this,Delaunay triangulation is used to establish geometric relationships between points.This approach reduces the product development cycle by associating an optimal cutter to each region which decreases machining times and costs and increases productivity.
机译：模具行业中使用的款式的零件。在多轴CNC铣床上加工。在三个阶段获得了最终形状：粗加工，半精加工和精加工。所有阶段都必须确定最大的刀具并因此是必不可少的最有效的切割器能够在没有刨凿和碰撞的情况下加工这些表面。目前，逆向工程用于重现它们CAD模型在此过程中不可用的对象，该对象被数字化以检索一组密集的点。在那里后果。在本文中难以确定最佳切割器之间的点之间的关系，对于直接从3D点直接从3轴CNC铣床上整理雕刻表面，提出了一种方法，将点数分成不同的区域估计点本地形状（凹，凸，平面，凹入可开发，凸出可开发，鞍座），然后确定每个regi的最佳球切割机关于避免干扰。如此，Delaunay三角测量用于建立点之间的几何关系。此方法通过将最佳切割器与加工时间和成本的每个区域相关联来降低产品开发周期，并提高生产率。

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