基于信噪比的FDM快速成型工艺参数优化分析

Optimization of Process Parameters for FDM Rapid Prototyping Based on SNR

目的研究FDM快速成型系统中工艺参数,优化工艺参数寻找最优工艺参数组合,提高成型件X、Y、Z方向尺寸精度.方法依据六因素三水平L_(27)(3^(13))正交表安排成型方向、分层厚度、填充线宽等重要可控工艺参数对成型件X、Y、Z方向尺寸精度影响实验,并利用参数设计中信噪比分析方法对实验结果进行优化分析,确定X、Y、Z方向最优尺寸精度工艺参数组合.结果从X、Y、Z方向信噪比响应表可观察出X、Y、Z方向最优尺寸精度参数组合为A_2B_3C_3D_3E_3F_1、A_2B_2C_2D_2E_3F_2、A_1B_1C_3D_3E_1F_2.结论通过信噪比分析方法优化后的工艺参数可有效提高成型件尺寸精度,优化后的工艺参数具有广泛的适用性,对用户合理选择工艺参数提供参考价值.

In order to improve the products dimension accuracy in X、Y、Z directions, the paper studied the fused deposition modeling （FDM）rapid prototyping to find the optimal process parame- ters. Based on six factors and three levels L27 （3^13）, the orthogonal experiment was designed to dis- cover the effects of the forming orientations, slice height, contour width and other controlled process parameters on the products dimension accuracy in X, Y,Z directions, and the signal-to-noise ratio（SNR） was used to optimize the experimental results to determine the optimum processing parameters combination. The response table showed that the optimum parameter combination were A2 B3 C3 D3 E3 F1、A2 B2 C2 D2 E3 F2 ,A 1 B1 C3 D3 E1 F2. The confirmatory experiment results revealed that the proposed method could improve the dimension accuracy of the products effectively, and the op- timized process parameters have a wide application range and provide valuable reference for choo- sing reasonable process parameters.