Browse > Article
http://dx.doi.org/10.14775/ksmpe.2022.21.01.090

Optical Design of a 2-kW-Level Laser Head for Metal 3D-Printing Systems  

Lee, Joohyung (Department of Mechanical System Design Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.21, no.1, 2022 , pp. 90-94 More about this Journal
Abstract
Metal 3D-printing technology enables the manufacture of complex features or internal structures, which is not possible in fabrication by conventional cutting methods. The most successful types of metal 3D printing have been powder bed diffusion and directed energy deposition, which use laser heads exploiting high-power laser sintering metal powder. In this study, a cost-effective optical design was proposed for a 2-kW-level fiber laser head. Only two commercial lenses, a beamsplitter and a window, are used in the laser head, satisfying the technological requirements. According to the optical design, the spot size was 2.54 mm, and the stand-off distance from the laser head was 295 mm. The intensity distribution was Gaussian. Thus, smooth power sintering was possible without any laser spot marks. Monte Carlo analysis was employed to verify the consistency of the optical performance under conventional assembly tolerance.
Keywords
Metal 3D Printing; Laser Head; Optical Design;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Ngo, T. D., Kashani, A., Imbalzano, G., Nguyen, K. T., & Hui, D., "Additive manufacturing (3D printing): A review of materials, methods, applications and challenges," Composites Part B: Engineering, Vol. 143, 2018.
2 Zhang, J., Wang, J., Dong, S., Yu, X., & Han, B., "A review of the current progress and application of 3D printed concrete," Composites Part A: Applied Science and Manufacturing, Vol. 125, 2019.
3 DebRoy, T., Mukherjee, T., Milewski, J. O., Elmer, J. W., Ribic, B., Blecher, J. J., & Zhang, W., "Scientific, technological and economic issues in metal printing and their solutions", Nature materials, Vol. 18, No. 10, pp. 1026-032, 2019   DOI
4 Froes, F. H., and B. Dutta., "The Additive Manufacturing (AM) of Titanium Alloys." Advanced Materials Research, Vol. 1019, 2014.
5 Wood, R. M., Laser-Induced Damage of Optical Materials, CRC Press, 2003.