Research On Filling Algorithm And Path Planning Of Heterogeneous Functional Parts

Heterogeneous and heterogeneous functional parts refer to parts made of different materials and different structures with specific functions,which are suitable for the lightweight and versatility of parts in the fields of aerospace,electronic information confrontation and military.The traditional manufacturing method of heterogeneous and heterogeneous functional parts is electromechanical separation,which has the problems of complex process and difficult formation of complex structures.The integrated spray forming technology can realize the simultaneous spraying and solidification of supporting protective structures and functional systems,which is not only easy to achieve complex structure forming,It can also simplify the manufacturing process.However,how to improve the forming accuracy and forming efficiency is a problem that needs to be solved urgently.Therefore,this paper studies the high-precision and high-efficiency 3D printing model processing method.Firstly,in view of the large error caused by the step effect,combined with the array nozzle structure,an optimal filling method of the model based on interval scanning is proposed.The size compensation model is established by calculating the boundary inclination in real time,which effectively improves the boundary accuracy The simulation results show that the overall model printing fill rate can reach more than 99%,which can increase the model fill rate by 1.18%compared with before compensation.Secondly,for the problem of large printing error and slow speed of the surface model,a surface model block printing method based on multi-objective optimization was proposed,and a block path planning algorithm based on discrete mesh surfaces with minimum local curvature and shortest boundary connection was designed.The goal of achieving the shortest boundary of the block connection is to reduce the effect of the step effect at the surface splicing on the forming effect.The simulation results show that the overlapping rate of the motion path of the curved model after the block reaches 98%,and the path planning method of the curved model is compared with the traditional The method reduces the length of the boundary connection by 71.6%,and maximizes the use of the nozzle structure while reducing the boundary accuracy of the connection block and reduces its reciprocating path.Thirdly,the software system for surface slice model processing and printing path planning was developed,the model data preprocessing method was designed,the conversion of the three-dimensional model to motion control instructions and printing control instructions was realized,and the software was used to virtualize the filling,The algorithm is correct.Finally,the plane model and the surface model were used for jet experiments,and finally the heterogeneous and heterogeneous functional parts were printed and formed.The results show that the model filling method proposed in this paper improves the dimensional accuracy by 64%compared with the traditional method,and verifies the surface model path planning Compared with the traditional method,the method reduces the error caused by the boundary connection length by 71.6%,effectively improves the printing accuracy,and the formed sample meets the accuracy requirements.