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打印参数对具有网格结构的熔融沉积成型打印部件尺寸误差、表面粗糙度和孔隙率的影响

Effect of Printing Parameters on Dimensional Error, Surface Roughness and Porosity of FFF Printed Parts with Grid Structure.

作者信息

Buj-Corral Irene, Bagheri Ali, Sivatte-Adroer Maurici

机构信息

Department of Mechanical Engineering, Barcelona School of Industrial Engineering (ETSEIB), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), 08028 Barcelona, Spain.

Department of Mechanical Engineering, Vilanova i la Geltrú School of Engineering (EPSEVG), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), 08880 Vilanova i la Geltrú, Spain.

出版信息

Polymers (Basel). 2021 Apr 9;13(8):1213. doi: 10.3390/polym13081213.

DOI:10.3390/polym13081213
PMID:33918648
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8070634/
Abstract

Extrusion printing processes allow for manufacturing complex shapes in a relatively cheap way with low-cost machines. The present study analyzes the effect of printing parameters on dimensional error, roughness, and porosity of printed PLA parts obtained with grid structure. Parts are obtained by means of the fused filament fabrication (FFF) process. Four variables are chosen: Layer height, temperature, speed, and flow rate. A two-level full factorial design with a central point is used to define the experimental tests. Dimensional error and porosity are measured with a profile projector, while roughness is measured with a contact roughness meter. Mathematical regression models are found for each response, and multi-objective optimization is carried out by means of the desirability function. Dimensional error and roughness depend mainly on layer height and flow rate, while porosity depends on layer height and printing speed. Multi-objective optimization shows that recommended values for the variables are layer height 0.05 mm, temperature 195 ºC, speed 50 mm/min, and flow rate 0.93, when dimensional error and roughness are to be minimized, and porosity requires a target value of 60%. The present study will help to select appropriate printing parameters for printing porous structures such as those found in prostheses, by means of extrusion processes.

摘要

挤出打印工艺能够使用低成本机器以相对便宜的方式制造复杂形状。本研究分析了打印参数对采用网格结构获得的打印聚乳酸（PLA）部件的尺寸误差、粗糙度和孔隙率的影响。部件通过熔融沉积成型（FFF）工艺获得。选择了四个变量：层高、温度、速度和流速。采用带有中心点的二级全因子设计来定义实验测试。尺寸误差和孔隙率用轮廓投影仪测量，而粗糙度用接触式粗糙度仪测量。为每个响应建立了数学回归模型，并通过合意函数进行多目标优化。尺寸误差和粗糙度主要取决于层高和流速，而孔隙率取决于层高和打印速度。多目标优化表明，当要使尺寸误差和粗糙度最小化且孔隙率要求目标值为60%时，变量的推荐值为层高0.05毫米、温度195摄氏度、速度50毫米/分钟和流速0.93。本研究将有助于通过挤出工艺为打印假体等多孔结构选择合适的打印参数。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/a9dfbb778c85/polymers-13-01213-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/a9dfbb778c85/polymers-13-01213-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/e7df1f870a82/polymers-13-01213-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/e71c4e621a87/polymers-13-01213-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/5ecb3f8a8fd6/polymers-13-01213-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/695fb45ba065/polymers-13-01213-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/05a450e14740/polymers-13-01213-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/0a823d685001/polymers-13-01213-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/88f816615126/polymers-13-01213-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/d3797c735afd/polymers-13-01213-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/3ca6d7559cf5/polymers-13-01213-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/0f1c3dc4e2f5/polymers-13-01213-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86a7/8070634/c9ff9fdedb36/polymers-13-01213-g011.jpg
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