[ Technical Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 1, pp.92-98

ISSN: 2508-5107 (Online)

Print publication date 15 Feb 2021

Received 21 Dec 2020 Revised 24 Dec 2020 Accepted 29 Dec 2020

DOI: https://doi.org/10.7735/ksmte.2021.30.1.92

금속 3D 프린팅 공정의 결함 분석

최병주^a ; 양재영^a ; 이문구^a ; 전용호^a^{, *}

Defect Analysis of Metal 3D Printing Process

Byungjoo Choi^a ; Jaeyoung Yang^a ; Moongu Lee^a ; Yongho Jeon^a^{, *}

aDept. of Mechanical Engineering, Ajou University

Correspondence to: ^*Tel.: +82-31-219-3652 E-mail address: princaps@ajou.ac.kr (Yongho Jeon).

초록

Metal 3D printing is attracting attention as a new production technology. However, various problems need to be solved regarding it. In particular, defects occurring in the process of melting and solidification are relatively serious than those occurring in the traditional casting or cutting process. To solve this problem, this study introduced a tomography using a high-speed camera that can monitor the melting pool. This confirmed the possibility of finding defects by detecting an abnormality in the melting pool. In addition, if it is combined with the YOLO model, which is the latest object detection algorithm, it is judged that the integrity of the parts produced by the casting or cutting process can be secured by stopping or recovering the process through real-time inspection.

Keywords:

Metal 3D printing, Melting pool tomography, Cross-sectional analysis, Object detection, YOLO

Acknowledgments

본 연구는 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구 과제입니다(No. 20206410100080).

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Byungjoo Choi

Postdoctoral researcher in Department of Mechanical Engineering, Ajou University.His research interest is Metal 3D printing with Manufacturing machine design and material analysis.

E-mail: dasom@ajou.ac.kr

Jaeyoung Yang

B.Sc. candidate in the Department of Mechanical Engineering, Ajou University.His research interest is Precision machine design and control.

E-mail: yang950805@ajou.ac.kr

Moongu Lee

Professor in the Department of Mechanical Engineering, Ajou University.His research interest is design and control of precision system control.

E-mail: moongulee@ajou.ac.kr

Yongho Jeon

Professor in the Department of Mechanical Engineering, Ajou University.His research interest is Novel manufacturing processes.

E-mail: princaps@ajou.ac.kr