工艺参数对并联3D打印机成型精度影响分析

Influence Analysis of Process Parameters on Molding Accuracy of Parallel 3D Printer

为提高并联3D打印机的打印成型精度,针对影响其打印成型精度的主要工艺参数进行试验分析,对打印头温度、打印速度、分层厚度和工作平台温度这四项工艺参数设计4因素3水平的9组正交试验,通过因素极差图和方差分析,研究各个因素水平对打印件x、y、z方向尺寸精度、圆孔直径和表面粗糙度的影响程度,并得到对打印成型精度影响较小的最佳工艺水平组合。结果表明,打印头温度、分层厚度对打印件尺寸精度影响较为显著,打印速度对表面粗糙度影响较为显著。

In order to improve the printing precision of parallel 3D printers, the main process parameters affecting the printing precision are tested and analyzed. 9 sets(4 factors, 3 levels) orthogonal test are designed for print head temperature,print speed, layer thickness and working platform temperature. Through the factor range diagram and variance analysis, this paper studies influence degree of each factor and level on the dimensional accuracy, circular hole diameter and surface roughness of the print in the x, y, and z directions. It is the best process level combination that is less affected by the accuracy of print molding. The results show that the print head temperature and layer thickness have a significant effect on the dimensional accuracy of the print, and the print speed has a significant effect on the surface roughness.