Research On Path Planning Strategy And Its Application Based On FDM

As a new kind of molding processing technology with a variety of advanced techniques,the additive manufacturing technology has been a hotspot of research and attention due to its advantages compared to traditional processing methods and its wider use in recent years. The scanning path planning is a very important step in the process planning of additive manufacturing. The quality of path planning affects the forming parts’ performance directly.Based on the research of the existing scanning paths,a novel scanning path planning,with changing distance of filling path, algorithm is proposed in this article .And the algorithm application and the performance of forming parts are analyzed and studied.According to the research of the molding process and process planning of the additive manufacturing ,a creating algorithm of scanning path planning which has changing distance of filling path based on density value is presented. The creating algorithm can realize the uneven distribution of the material inside the contour based on the giving density value to create the structure which has square holes with different sizes. Firstly, the algorithm offsets the contour loops produced by slicing on CAD model, and the information of the filling path lines can be got after unit division, giving the density value and treatment of density value.Finally, the information is used to obtain the intersection points of the contour offsets and filling path lines, and reorder the points to complete the scanning path planning.With the purpose of improving the rigidity of the forming parts, the topology optimization of continuum structure based on variable density method is used to optimize the distribution of the material inside the contour. Combine the result of the topology optimization with the scanning path planning algorithm in this article to complete the path planning of the part. The precision of density value and mechanical properties of the forming parts are analyzed using MATLAB and ANSYS software. Finally, use the experiment result to verify the simulation results.After completion of feasibility verifying of the algorithm, the structure and mechanical parameters estimation of the porous structure has been done with the Gibson-Ashby model.Establish the Representative Volume Element (RVE) and through the simulation calculation of RVE, using ANSYS software to get simulation value of the porous structure’s elastic modulus.Through the compression experiment, the experimental value of the elastic modulus was obtained,and use it to modify the simulation model.