Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Optical Design of a 2-kW-Level Laser Head for Metal 3D-Printing Systems

금속 3D 프린팅 시스템 구축을 위한 2 kW 급 레이저헤드 광학설계

  • Lee, Joohyung (Department of Mechanical System Design Engineering, Seoul National University of Science and Technology)
  • 이주형 (서울과학기술대학교 기계시스템디자인공학과)
  • Received : 2021.10.22
  • Accepted : 2021.11.29
  • Published : 2022.01.31
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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

Acknowledgement

이 연구는 서울과학기술대학교 교내 일반과제 연구비 지원으로 수행되었습니다.

References

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