| Fused Deposition Modeling is one kind of the Rapid Prototyping techniques.Which has developed rapidly in recent decades.However,its processing precision is affected by various factors.The scanning mode is one of the most important factors.In this paper,the scanning mode of the Fused Deposition Modeling is analyzed and optimized by theoretical analysis,with ANSYS finite element analysis as a tool,and the experimental verification is also carried out.The specific work is as follows:The factors affecting the precision of Fused Deposition Modeling are studied:the errors caused by material shrinkage and molecular orientation shrinkage,the errors caused by data format of model,the errors caused by model slicing,mechanical system errors,etc.In view of various error factors,the measures that can be taken are briefly outlined.The scanning method of Fused Deposition Modeling is studied:The existing scanning method is analyzed,the influence of various scanning method on model shrinkage and precision is summarized,and a new scanning method is proposed,and compared with the traditional scanning method.Two scanning method are simulated and analyzed:the process and characteristics of Fused Deposition Modeling are studied,and the requirements of ANSYS numerical simulation data model,reasonable assumptions and simplification are carried out,and the analysis model of Fused Deposition Modeling was established.The properties of ABS resin such as elastoplastic,phase change,enthalpy and heat conduction are also studied.According to the Fused Deposition Modeling process,the numerical simulations of the two scanning method are completed by APDL programming technology under the same external load and constraint by using the birth and death technology of ANSYS.The file format of G_code is analyzed,the processing document is compiled,and two kind of models are machined.The data is counted and compared with the simulation analysis results:the simulation results is consistent with the experimental data. |
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