Papers by Keyword: NC Tool Path

Abstract: To improve efficiency of NC tool path generation for triangular Bézier surface and solve the interference issues of tool path, we proposed an algorithm of generating interference-free NC tool path based on triangular Bézier surface. The R*S tree is introduced into the algorithm and the dynamic spatial index structure of the triangular Bézier surface model is established by R*S tree; the intersection regions are acquired rapidly based on the R*S tree, so that the intersection triangular Bézier patches are located exactly; each intersection triangular Bézier patch is adaptively subdivided into many triangular planar patches in the scope of the tool path precision; the intersection curves are acquired through the intersection of triangular planar patches and cutting planes; the points on intersection curves are taken as the driving points, thus the interference-free cutter location points of triangular Bézier surface are obtained by the iterative calculation method, and then the interference-free cutter location points are connected rightly to generate NC tool path. It has been proved by examples that the algorithm of generating NC tool path based on triangular Bézier surface has strong adaptation to data type and that it can accurately and efficiently obtain the interference-free NC tool-path for the intricate triangular Bézier surface.

Abstract: To achieve the accurate duplication of product in reverse engineering, We proposed an algorithm for the optimization of NC tool-path based on scanning points, which can be realized through the following two steps. At first, we approximated NC tool-path by many tool-path segments according to the optimized accuracy. Then we adjusted the nodes of approximation tool-path so that it can match smoothing requirements. It has been proved by examples that the optimization algorithm can realize the optimization of NC tool-path for scanning points effectively and improve the efficiency of product processing significantly.

Abstract: To enhance the precision and productivity of ultra precision aspheric surface micro lens, the development of ultra-precision grinding system and process for the aspheric surface micro lens are described. In this paper, an ultra-precision grinding system for manufacturing the aspheric surface micro lens was developed by considering the factors affecting the grinding surface roughness and profile accuracy. This paper deals with the mirror grinding of an aspheric surface micro lens by resin bonded diamond wheel and with the spherical lens of BK7. The optimization of grinding conditions with respect to ground surface roughness and profiles accuracy is investigated by design of experiments.