FDM在模具制造中精度及强度的研究

Research on Accuracy and Intensity in Mould Manufacturing Using FDM

随着熔融沉积制造(Fused Deposition Modeling-FDM)在模具行业上的进一步应用,提高模具的精度和强度成为其首要解决的关键问题,但目前高的成型精度及良好的表面质量还难以保证。在对成型工艺参数分析的基础上,考虑了熔融沉积制造过程中层厚和成型角度两个主要影响成型精度和表面粗糙度的因素,建立了成型角度和层厚之间关系的数学模型,且对模型进行了MATLAB仿真,并利用Pandey所提出的表面粗糙度模型对所建模型进行了验证。此模型为提高模具表面质量及强度提供了理论指导,同时促进了砂型用模快速制造的发展。

With the fused deposition manufacturing（FDM）further application in the mold industry,improving the accuracy and the intensity of mold becomes a key issue of its primary solution,but the current high molding accuracy and good surface quality are difficult to be guaranteed. On the basis of the analysis of the molding process parameters,considering the thickness and deposition orientation of two major factors that influence the forming accuracy and surface roughness to establish the mathematical model of the relationship between the molding direction and thickness and conduct MATLAB simulation,the module was validated by surface roughness mathematical mentioned by Pandey,and the mathematical model provided theoretical guidance for improve the surface quality and strength of the mold,while promoting the development of the sand mold for rapid manufacturing.