Post-Processing of FDM 3D-Printed Polylactic Acid Parts by Laser Beam Cutting

Polymers
Mahmoud MoradiHamid Falavandi

Abstract

In this paper, the post-processing of 3D-printed poly lactic acid (PLA) parts is investigated. Workpieces are manufactured by fused deposition modeling (FDM) 3D printing, while they may have defects in some areas such as edges. A post-processing is introduced here for 3D-printed samples by low power CO2 laser. The thickness of the FDM samples are 3.2 mm and printed by optimum conditions. Effects of process parameters such as focal plane position (-3.2-3.2 mm), laser power (20-40 W), and laser cutting speed (1-13 mm/s) are examined based on the design of experiments (DOE). Geometrical features of the kerf; top and bottom kerf; taper; ratio of top to the bottom kerf are considered as output responses. An analysis of the experimental results by statistical software is conducted to survey the effects of process parameters and to obtain regression equations. By optimizing of the laser cutting process; an appropriate kerf quality is obtained and also optimum input parameters are suggested. Experimental verification tests show a good agreement between empirical results and statistical predictions. The best optimum sample with 1.19 mm/s cutting speed, 36.49 W power and 0.53 mm focal plane position shows excellent physical features afte...Continue Reading

References

Jun 16, 2018·Dental Clinics of North America·Rujuta A KatkarGerald T Grant
Mar 1, 2019·Materials Science & Engineering. C, Materials for Biological Applications·Antonio GloriaM Domingos
Apr 28, 2019·Materials·Mahdi BodaghiSaeed Norouzi
Sep 25, 2019·Polymers·Yuhan LiaoKhalid Lafdi

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