FDM 3D打印工艺参数对PLA制件力学性能的影响

Influence of FDM 3D-printing Process Parameters on Mechanical Property of PLA Sample

采用五因素四水平正交试验设计,对16组不同工艺参数(打印层厚、填充密度、打印温度、填充速度、外壳厚度)的FDM 3D打印聚乳酸(PLA)制件力学性能进行了测试和结果分析,确定了影响PLA制件力学性能的主要因素,其中,外壳厚度对制件力学性能影响最为明显,打印温度影响最小,同时分析得到了在打印层厚0.15 mm,填充密度40%,打印温度210℃,填充速度60 mm/s,外壳厚度1.6 mm条件下可获得力学性能最佳的制件。最后对试验数据进行回归分析,拟合得到了FDM打印工艺参数与PLA制件力学性能指标的数学模型;通过对不同打印工艺参数的试样进行试验验证,表明该模型拟合误差小(5%以内),可靠性高,可用来对FDM 3D打印制件的加工提供参考。

This paper reported a study on the effect of FDM 3D-printing process parameters such as layer thickness,filling rate,printing temperature,filling speed,contour thickness on the mechanical property by using orthogonal test with five-factors and four-levels.The main factors affecting the mechanical properties of PLA parts were determined.The most significant influence factor is contour thickness and the least important factor is printing temperature.The optimal property sample can be obtained with the layer thickness 0.15 mm,filling rate 40%,printing temperature 210℃,filling speed 60 mm/s and contour thickness 1.6 mm.Mathematical model of the FDM 3D-printing process parameters and PLA sample mechanical property was bulit by using regression analysis and verified by using samples made by different printing parameters.The verification results show that the model error is lower than 5%and reliability is high.This model will be helpful for producing FDM 3D-printing parts.