2026-05-30T22:25:56Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/401472026-02-03T11:18:51Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Martín-Béjar, Sergio
author
Bañón-García, Fermín
author
Bermudo-Gamboa, Carolina
author
Sevilla-Hurtado, Lorenzo
2025-10-09T10:00:06Z
2025-10-09T10:00:06Z
2025
Martín-Béjar, S.; Bañón-García, F.; Bermudo Gamboa, C.; Sevilla Hurtado, L. Machinability and Geometric Evaluation of FFF-Printed PLA-Carbon Fiber Composites in CNC Turning Operations. Appl. Sci. 2025, 15, 8141. https://doi.org/10.3390/app15158141
https://hdl.handle.net/10630/40147
10.3390/app15158141
Fused Filament Fabrication (FFF) enables the manufacturing of complex polymer components. However, surface finish and dimensional accuracy remain key limitations for their integration into functional assemblies. This study explores the potential of conventional turning as a post-processing strategy to improve the geometric and surface quality of PLA reinforced with carbon fiber (CF) parts produced by FFF. Machinability was evaluated through the analysis of cutting forces, thermal behavior, energy consumption, and surface integrity under varying cutting speeds, feed rates, and specimen slenderness. The results indicate that feed is the most influential parameter across all performance metrics, with lower values leading to improved dimensional accuracy and surface finish, achieving the most significant reductions of 63% in surface roughness (Sa) and 62% in cylindricity deviation. Nevertheless, the surface roughness is higher than that of metals, and deviations in geometry along the length of the specimen have been observed. A critical shear stress of 0.237 MPa has been identified as the limit for interlayer failure, defining the boundary conditions for viable cutting operation. The incorporation of CNC turning as a post-processing step reduced the total fabrication time by approximately 83% compared with high-resolution FFF, while maintaining dimensional accuracy and enhancing surface quality. These findings support the use of machining operations as a viable and efficient post-processing method for improving the functionality of polymer-based components produced by additive manufacturing.
eng
Impresión 3D
Procesos de fabricación
Polímeros
Fibras de carbono
Machinability and geometric evaluation of FFF-printed PLA-carbon fiber composites in CNC turning operations.
journal article
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URL
https://riuma.uma.es/bitstreams/d07763b4-0182-437f-be6a-13a7048cde18/download
File
MD5
fb0ea8299dedf9de9b32c105638e9e9d
138886
application/pdf
applsci-15-08141.pdf