Optimized Design Of 3D Printing Path Compensation For Large Size FDM Model

Additive manufacturing technology is one of the five core technologies pointed out in "Made in China 2025".For the large-size FDM model,due to the large area of the contact surface of the model and the long printing path,the phase change process in the model printing process will have an uneven temperature gradient and residual stress distribution,making the printed model warped.The warped deformation of the printed model will affect the quality of the printed model and reduce the printing efficiency,and will cause the printed model to separate from the working valve table,which will cause the printing to fail and cause a lot of waste of consumables.In order to solve the problem of the warpage of the contact surface of the large-scale model,this paper conducted the following three aspects of research:(1)Analyze the three major factors of the influence of fused deposition modeling technology(FDM)on printing accuracy: early data processing error,molding processing error and model post-processing error,etc.,and establish a mathematical model of the maximum warpage deformation of the large-size model Through simulation experiments on relevant parameters,model printing parameters with relatively small warpage of the model can be obtained.(2)A layered slicing algorithm based on MATLAB software is proposed.This algorithm extracts all triangles on a layered plane and sorts these triangles twice to extract these triangles and The coordinates of the intersection point of the tangent plane finally get the outline of the tangent plane.(3)A compound scanning path planning algorithm is proposed.This algorithm is a combination of directional parallel path planning algorithm and contour parallel path planning algorithm,which improves the printing efficiency of parts and reduces the consumption of consumables.In addition,after building a large-scale model printing experimental device: 3D printer M1000,the algorithm proposed in this paper can be verified by physical printing experiments.Through the simulation experiment in Chapter 4 and the physical printing experiment in Chapter 5,it can be concluded that for the experimental samples printed in this experiment,the printing path length is reduced by 8.14%,saving printing time,improving printing efficiency,and verifying The feasibility of this algorithm.