Research On The Slicing Technology For 3D Printing Based On FDM

3D printing manufacturing technology can shorten the design time, reduce the risk of product processing. The slicing technology of 3D printing is the basis and soul of model manufacturing.3D printing based on FDM in hierarchical process is particularly important for the model of data processing, supporting structure design, generation method, hierarchical processing algorithms and filling of the layer outline scanning algorithm research.This article has carried on the detailed introduction and analysis of the file format STL of the 3D printing standard, with the implementation language of Visual C++, the visualization of STL data model could be realized by the significant ability in interactive scene process and rendering of OpenGLThrough the research of manufacturing precision and the analysis of mechanism of the rapid prototyping of fused deposition, basing of automatic generation method of STL model supporting structure, the automatic recognition of the region that need additional support, especially of the indiscernible point of suspension and the suspension wires could be solved,as well as the design of structures with variety of support type support.Choosing the model based on STL to be hierarchical processed, do the PS Packet Sequencing to the triangular patch firstly, then use the integrated arithmetic of obtaining the slice contours through the method of directed weighted recursive, which is the directed weighted recursive algorithm of packet sort. Using this layering algorithm can reduce the establishment time of the topology relation between patches, and the node that was achieved by this algorithm was ordered arranged, can be directly obtained the closed contour of end to end.Planning the scanning path according to the internal layer contour data, planning the completion of the formation of the tool path, then the tool path was input in the 3D printing manufacturing system so the NC program could be generated. This article will analyze and study the algorithm of path planning, and the path planning method, which is combine the outline scanning and sub-regional scanning will be proposed and implemented, as well as transforming into NC program, and put into 3D printing system with the form of x3g.