The Research Based On FDM Rapid Prototyping Support Technology

Rapid prototyping technology is a revolutionary of technological breakthrough in the field of manufacturing since the 1980s. It not only different with manufacturing principles of traditional methods, more important is the first reaction of the new product development in the market. Rapid prototyping can quickly get a prototype, to respond quickly to market, and greatly shorten product develop cycles, reduce development cost. Fused Deposition Modeling (FDM) is a rapid development in recent years. RP technology can make the design idea into a physical model, but it still has some defects of accuracy, strength. It can not be make the actual physical into the product, further studies are needed to continuously improve the performance quality of molded parts to meet the requirements.Fused Deposition Modeling (FDM) process make a complex 3D processing into simplified 2D processing, using ABS plastic, wax and other materials, accumulated by the nozzle out of thermoplastic material, make production model by layer stacked. This paper based on Fused Deposition Modeling (FDM) technology principle and characteristics, using a door handles as the prototype, analysing the impact of door handles precision, intensity factors, and propose solve measures. In the first, analysis of the error of FDM process in the pre-processing, molding-process, post-processing, FDM process use the layer stacked molding, in the process of accumulation will produce staircase affects, affecting the molding surface accuracy, under the causes, and proposed measures to reduce the error:reducing the thickness, choose the direction of processing, adaptive hierarchical method, these measure can reduce the step error to get a better surface quality. This paper focuses on the support the grid width of the fused deposition modeling to study the surface quality, After careful experiments, rigorous data measurement, then have the final conclusion. surface roughness is closely related to support grid width value dependencies, Processing of handle under different support grid width value of the surface roughness is not the same. Within the optimum support grid width value, can get better handle. Through the experiment based on the model of car door handle, the processing model under different support grid width value, Using a standard plastic surface roughness instrument for measuring the surface roughness of the model, The roughness is obtained and the corresponding support grid width value curve, Analysis of reasons, finally come to the conclusion. The ABS von berg is obtained by FDM process of surface roughness in 10.4μm-12.55μm, The grid width value is 1 minimum surface roughness value, forming quality is the best.Paper of the last study on the Forming room temperature on the performance of supprting and shaping effect of hardness. By processing model at different temperature, standard plastic hardness tester for measuing hardness of the model, came to a change of hardness curve, to analyze the reasons, finally come to the conclusion. The ABS von berg is obtained by FDM process of surface hardness in 32D-45D, One of the molding temperature15 degreescentigrade-20 degrees centigrade between the highest hardness, forming quality is the best.