Design And Development Of Induction Heating Fuse Additive Manufacturing Device And Research On Molding Process

At present,metal additive manufacturing mainly uses metal powder and metal wire as printing materials.The traditional powder-feeding additive manufacturing technology has many problems,such as high equipment cost,low material utilization rate,and easy environmental pollution.In contrast,wire additive manufacturing technology can effectively improve material utilization and reduce manufacturing costs.The FDM process is mainly heated by resistance heating,so the heating rate is slow and the temperature is not high enough,which is difficult to meet the requirements of high melting point metal wire printing.This greatly limits the printing performance of the FDM process,making it mainly used for printing on plastics and low-melting metal filaments.Based on the above situation,in order to improve the forming performance of the FDM process,based on the principle of electromagnetic induction heating and the structural basis of FDM,an induction heating fuse nozzle is designed for high melting point metals and an induction heating fuse additive manufacturing device is integrated.The feasibility of the induction heating fuse additive manufacturing process was studied and the properties of the formed samples were analyzed.The main work of this paper is as follows:(1)The design of the induction heating fuse head and the overall integration of the device.Using electromagnetic induction heating technology as the heat source of the FDM molding process,an induction heating fuse additive manufacturing device was developed.An induction heating fuse head has been independently developed.The heating head has the advantages of cleanliness and efficient heating,and theoretically realizes the limitation of the type of metal wire,which provides the equipment basis for the preliminary exploration of fused deposition molding of 7075 aluminum alloy wire.(2)Experiment of induction heating fuse additive manufacturing process.Using 7075 aluminum alloy welding wire as the experimental material,the feasibility of the induction heating fuse additive manufacturing process was verified.First,the influence of the parameters of the induction heating fuse additive manufacturing process on the line height and line width of the forming melt channel was studied through a single-layer and single-pass experiment;secondly,a single-layer multi-pass forming experiment was carried out to verify the two-dimensional forming of the process.Feasibility;Finally,the feasibility of the multilayer molding of the process is verified by the multi-layer deposition molding experiment.(3)Performance analysis of the molded specimens.In order to explore the mechanical properties of the formed parts produced by this process,preliminary studies on the metallographic structure,microhardness and tensile strength of the experimental samples formed by 7075 aluminum alloy were carried out,and the feasibility of the process was investigated from the mechanical properties.The later process improvement provides theoretical reference and equipment optimization guidance.This research provides a new heat source reference for fused deposition modeling technology,improves the printing performance of fused deposition modeling technology,and plays a certain role in promoting the application and promotion of high melting point metal wire printing technology.