3D打印参数对FDM增材制造PLA零件力学性能的影响

A. Murariu, N. Sîrbu, Marius Cocard, I. Duma
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引用次数: 2

摘要

本文介绍了采用熔融沉积建模(FDM)技术进行3D打印工艺参数对ULTRA PLA长丝沉积材料力学性能影响的析因实验结果。通过实验规划和实验结果的统计处理,建立了目标函数与可控因素之间的依赖关系及其相互作用的数学关系。为了获得3D打印部件的高抗拉强度,需要允许尽可能薄的层沉积(h = 0.1 mm)和尽可能高的温度,接近300°C。这些工艺参数的选择不当会导致抗拉强度显著下降,甚至可能达到最大可能值的30-40%。实验结果表明,印刷速度对材料的力学性能影响不大。实际上,打印速度受到所使用打印机的技术特性的限制。在30种工艺变体上获得的实验研究结果导致建立最佳3D打印变体,这些变体对应于对客观分析功能(抗拉强度,尺寸精度,执行速度,表面质量)的要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of 3D Printing Parameters on Mechanical Properties of the PLA Parts Made by FDM Additive Manufacturing Process
Paper presents the results of factorial experiments made to establish the influence of technological parameters of 3D printing using the Fused Deposition Modeling (FDM) Technology, on the mechanical properties of the material deposited with ULTRA PLA filaments. By planning the experiments and the statistical processing of the results, mathematical relations were established regarding the dependence between the objective functions, the controllable factors and their interactions. To obtain high tensile strengths of the components made by 3D printing, regimes are required to allow the deposition of layers as thin as possible (h = 0.1 mm) and temperatures as high as possible, close to 300°C. The choice of inappropriate values of these process parameters can lead to a significant decrease in tensile strength, reaching even up to 30-40% of the maximum possible value to be reached. The experiments reveal that the printing speed does not have a major influence on the mechanical properties. Practical, the printing speed is limited by the technical characteristics of the printer used. The results of the experimental research obtained on a number of 30 process variants led to the establishment of optimal 3D printing variants that correspond to the requirements imposed on the objectively analysed functions (tensile strength, dimensional accuracy, speed of execution, surface quality).
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