FDM工艺参数对CF/PETG制件尺寸精度的影响  

Effect of FDM process parameters on dimensional accuracy of CF/PETG parts

作　　者：田国强 吴凯 高森森 许小奎 陈中中[2] TIAN Guoqiang;WU Kai;GAO Sensen;XU Xiaokui;CHEN Zhongzhong(School of Mechanical Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州航空工业管理学院机械工程学院,郑州450046 [2]郑州大学机械与动力工程学院,郑州450001

出　　处：《工程塑料应用》2024年第8期104-109,116,共7页Engineering Plastics Application

基　　金：河南省科技攻关计划项目(202102210080);郑州航院研究生教育创新计划基金项目(2023CX60)。

摘　　要：碳纤维(CF)增强聚对苯二甲酸乙二酯-1,4-环已烷二甲酯(CF/PETG)材料在护具、晶格结构、假体制造等行业得到广泛应用。熔融沉积成型(FDM)作为复杂零件成型的主要技术在增材制造生产中广泛使用,但工艺参数选择不当会导致制件成型精度较低。以商用CF/PETG线材为对象,采用FDM工艺制备了试验样件,研究了喷嘴温度、热床温度、层厚、填充率4个主要工艺参数对制件尺寸精度的影响。设计了L25(54)正交试验,进行了试验样件尺寸测量和误差计算,并采用极差分析确定了X,Y,Z每个方向上最佳工艺参数组合和四个因素的影响主次顺序。利用综合分析法对制件综合尺寸精度进行分析,得到了因素的影响顺序为:热床温度>层厚>填充率>喷嘴温度,确定了最优工艺参数组合为喷嘴温度245℃、热床温度65℃、层厚0.20 mm、填充率10%。采用优化的工艺参数进行CF/PETG塑件实物的3D打印制造,并通过逆向精度分析方法进行塑件实物精度评价,验证了优化的工艺参数能够为CF/PETG塑件的精度改善提供数据参考,进而指导实际应用。Carbon fiber(CF)reinforced polyethylene terephthalate-1,4-cyclohexanedimethanol(CF/PETG)materials have been widely used in industries such as protective gear,lattice structure,and prosthesis manufacturing.Fused deposition modeling(FDM),a primary technique for forming complex parts,is extensively employed in additive manufacturing,but improper selection of process parameters can lead to lower forming accuracy of the parts.Based on commercial CF/PETG wire as raw material,experimental samples were fabricated via FDM process to investigate the effects of four main process parameters,namely nozzle temperature,hot bed temperature,layer thickness,and filling rate,on the dimensional accuracy of samples.A L25(54)orthogonal experiment was designed,sample size measurement and error calculation were conducted,and range analysis was used to determine the optimal combination of process parameters in each direction of X,Y,Z and the order of influence of four factors.A comprehensive analysis method was employed to analyze the overall dimensional accuracy of the samples,and the order of factors was obtained as follows:hot bed temperature>layer thickness>filling rate>nozzle temperature.The optimal parameter combination was nozzle temperature 245°C,hot bed temperature 65°C,layer thickness 0.20 mm,and filling rate 10%.The 3D printing of CF/PETG plastic parts was performed using optimized process parameters,and the accuracy evaluation of the plastic parts was carried out through reverse accuracy analysis method.It was verified that the optimized process parameters can provide data reference for the accuracy improvement of CF/PETG parts,and guide practical applications.

关 键 词：碳纤维 聚对苯二甲酸乙二酯-1 4-环已烷二甲酯 熔融沉积 精度 正交试验 逆向精度评价 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]