Simulation Analysis Of Fused Deposition Modeling Printer Head Device

As the most representative technology in the "Third Industrial Revolution",additive manufacturing has triggered the upgrading of industrial chain and promoted the development of national economy.Fused deposition modeling technology is one of the most widely used technologies in additive manufacturing process.In this technology,the printer head device is the core component,and its performance significantly affects the accuracy and efficiency of product molding.In this paper,the simulation of the melt flow characteristics in the printer head and the fluid-thermal-solid coupling analysis of the whole printer head device structure are carried out.According to the simulation results,the combination optimization of the structural and manufacturing materials of the printer head device is carried out,and the improvement scheme of the printer head device structure is proposed.The research results of this paper are as follows:(1)Based on the principle of fused deposition modeling technology and the structure of the nozzle device,the three-dimensional model of the printer head device is established and simplified properly.The finite element software is used to set the mesh,boundary conditions and material parameters of the model.Finally,according to the characteristics of ABS material,the corresponding material viscosity model was developed with UDF(User-Defined Function)language.(2)By using the finite element software to simulate the melt flow in the flow passage of the printer head device,the law of the melt temperature field,pressure field and velocity field changing in the flow passage is obtained,and the influence of different feed speed,different heating temperature and different flow passage structure parameters on the melt flow characteristics is analyzed.(3)The finite element software is used to simulate the fluid-thermal-solid coupling of the whole printer head device,that is,the results of melt flow and the analysis results of temperature field of the printer head device are loaded into the printer head at the same time as the load.And the total deformation of the printer head device during the printing process is simulated.At the same time,the thermal-solid coupling analysis of the printer head device is carried out,and the result calculated by the two coupling methods are compared.(4)Based on the results of melt flow and the simulation of fluid-thermal-solid coupling,the structure and manufacturing materials of the heating block and the nozzle in the printer head device are combined and optimized,and the scheme of improving the structure of the heating block in the printer head device is put forward,the printer head device before and after the improvement is compared and analyzed,the result can not only reduce the deformation of the printer head structure during printing,but also improve the efficiency and stability of heat transfer in the printer head,which provides a reference for the subsequent optimization of the manufacturing material of the printer head device and the device structure.