熔融沉积3D打印参数对PETG-Tough薄壁不同角度尺寸精度的影响

Effect of Process Parameters of Fused Deposition 3D Printing on the Dimensional Accuracy of PETG-Tough Thin Wall at Different Angles

以熔融沉积成型(FDM)3D打印的聚对苯二甲酸乙二醇酯-1,4-环己烷二甲醇酯薄壁制件的不同倾角度数的尺寸精度作为研究对象设计正交试验,研究层高、挤出温度、回抽距离对FDM 3D打印不同倾角度数尺寸精度的影响,并使用极差分析与方差分析对结果数据进行处理,得到最优的参数组合。结果表明,挤出温度与回抽距离的变化对尺寸误差的影响很小,层高对不同倾角的影响规律不同:对25°、30°倾角,尺寸误差呈先降低后增大的趋势;对35°倾角,尺寸误差呈先略微增大后降低的趋势;对40°及以上的倾角,尺寸误差呈增大趋势。最后通过试验结果分析了单因素不同水平对不同倾角尺寸精度的影响,得出挤出压力、悬垂距离、材料黏度和走线方式是产生尺寸误差的主要原因。

The dimensional accuracy of thin-walled parts produced from fused deposition molding(FDM)3D printing at different inclination angles was studied based on the orthogonal experiment,the influences of layer height,extrusion temperature,and extraction distance on the dimensional accuracy of FDM 3D printing at different inclination angles were studied.Range analysis and variance analysis were used to process the resulting data and we obtained the optimal parameter combination.The results show that the changes of extrusion temperature and suction distance have little effect on the size error.Besides,the influences of layer height on different inclination angles are different:for 25°and 30°inclination angles,the size error decreases and then increases;for 35°inclination angle,the size error slightly increases and then decreases;for inclination angles≥40°,the size error has an increasing trend.Finally,the influences of single factor and different levels on the accuracy of different inclination angle dimensions were analyzed through experimental results,and it is found that extrusion pressure,suspension distance,material viscosity and wiring methods are the main reasons for size errors.