Research On Fused Deposition Modeling Technology For High-performance Thermoplastic Material

With the progress of technology,the manufacturing industry has also developed,especially the rapid development of additive manufacturing technology,and Fused Deposition Modeling technology is a kind of non-metallic material printing process,because of its simple structure,and high material utilization rate is widely used,however,there are still many problems to be solved in the high performance thermoplastic material molding of Fused Deposition Modeling technology,This paper takes Poly Ether Ether Ketone as an example.As a kind of high-performance thermoplastic material,it is located at the top of the performance pyramid.The mechanical properties of the material are very excellent,and its strength and modulus are higher than other resin materials.The main research work of this paper includes the following four points:(1)By understanding the principle and method of melting deposition forming,the distortion deformation mechanism of FDM forming components was analyzed,and its mathematical model was established to get the factors poignant the distortion deformation of the forming components.The distortion deformation quantity was calculated through the particular model,and eventually the finite part code was used for simulation analysis to match the theoretical price and simulation results.(2)The electrical control system of melting deposition molding was designed.Aiming at the characteristics of low precision and slow response speed of 3D printing temperature control,a new temperature control algorithm was proposed,and the algorithm was optimized and simulated.The simulation analysis was carried out,and finally the experiment was carried out to verify that the algorithm could realize fast response and improve the anti-interference of temperature control of sprinkler head.(3)A five-factor and four-level orthogonal experiment was designed to review the results of nozzle temperature,chamber temperature,hot bed temperature,layer thickness and molding speed on the mechanical properties of PEEK components,and also the optimized method parameter combination was obtained.Mechanical characterization was conducted by suggests that of tensile compression experiment,fracture morphology observation,nondestructive testing,etc,failure varieties of formed components beneath totally different method parameter mixtures were analyzed by typical samples,and also the effects of filling rate and filling technique on tensile strength of specimens were analyzed,and also the effects of PEEK and CF-PEEK materials on tensile strength were co Mpared and analyzed.Finally,the influence of warmth treatment method parameters on the mechanical properties of the specimen was analyzed,and also the response surface technique was designed to optimize the warmth treatment parameters,providing a basis for the later experiment.(4)By analyzing the factors that affect the surface quality,the influence of 16 groups of different process parameter combinations on the surface roughness of FDM forming parts was explored,and the influence degree of the process parameters affecting the surface roughness of the specimen was obtained through range analysis.Finally,the molding accuracy was co Mpared for specific models.