Research On Technology Of Path Generation For Model Lightweight

Lightweight as an important means of optimizing models in current industrial applications,making 3D printing technology more marketable.As 3D printing technology matures,it becomes more and more important how to print lightweight,high-intensity models.This paper first analyzes the model pretreatment technology,and then studies the filling trajectory.The main research works are as follows:(1)For the pretreatment technology of lightweight trajectory,a fast slicing algorithm and contour offset algorithm are proposed.First,calculate the intersections between triangular facet and the tangent plane,and save the intersection line and its number.In addition,store the triangular index and line serial number in the unordered map container,then according to the topology and storage structure to connect the line segment closed loop.the contour-offset operation is performed on the closed loop,the invalid ring is removed according to the closed contour numbering principle,and an effective ring is obtained,and the pre-processing operation of the light-weight trajectory is achieved.(2)For the generation technology of lightweight trajectory,honeycomb structure and cross-path structure are proposed.The generation algorithm of cellular path includes the parameter design,filling algorithm and segmentation modeling.The cross path based on zigzag path first calculates the intersection points of each line segment,and then sorts the intersection points according to the X or Y coordinates of each scan line and connects the points are connected to fill according to the principle of even and odd intersections.Finally,Achieve the rapid generation of cross-paths.(3)For the mechanical characteristics of honeycomb parameters optimization model,a finite element simulation method using Abaqus is proposed.First,an optimized mathematical model based on least material and adaptive compressive stress trajectory was established,and the relationship between honeycomb parameters and mechanical properties is established,then,a finite element simulation model is established according to the quasi-static compressive mechanical behavior,the finite element analysis is used to verify the performance of adaptive cellular structure and the performance of cellular trajectories under non-uniform load to obtain the optimal solution.Based on the VS2008 and OpenGL development platform,we developed the software for slicing and path planning of metal 3D printing,and achieved the expected design goal.