熔融沉积对制件工艺参数实验分析与研究

Experimental Analysis and Research on Process Parameters of Parts by Melt Deposition

针对熔融沉积制件尺寸及表面精度低的问题,提出一种提高成型件精度的新方法。该方法通过分析熔融沉积成型原理,建立数学模型研究分层厚度、成型速度、喷头加热温度各因素对精度影响,并利用Matlab仿真分析制件表面精度工艺参数。同时,将工艺参数进行3因素4水平进行多组基于正交实验法的设计,对实验结果进行实验极差分析,得出参数设定为分层厚度0.10 mm、成型速度20 mm/s、喷头加热温度220℃时效果最佳。利用快速成型设备制作样品,并通过制件测量,得出工艺参数理论推导与实验结果一致性,验证该方法能够有效地提高制件的成型精度,为提高熔融沉积制件表面精度提供一定参考价值。

Aiming at the problem of low surface accuracy and size of fused deposition parts,a new method to improve the accuracy of forming parts was proposed.By analyzing the principle of melt deposition forming,the mathematical model was established to study the influence of layer thickness,molding speed and nozzle heating temperature on the precision,and Matlab was used to analyze the surface accuracy process parameters of the parts.At the same time,the process parameters were designed by three factors and four levels based on the orthogonal experiment method.The orthogonal experiment range analysis was conducted on the experimental results.It was concluded that the best effect was achieved when the parameters were set as the layer thickness of 0.10 mm,the molding speed of 20 mm/s and the heating temperature of the nozzle was 220 ℃.The theoretical derivation of process parameters and experimental results were consistent by using the rapid prototyping equipment to produce the sample and through the measurement and comparison.It is verified that the method effectively improved the forming accuracy of the parts,and provides some reference value for improving the surface accuracy of the fused deposition parts.