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DED 적층 방식을 활용한 원통면 경사 적층에 관한 연구
김영일(Yeoung-Il Kim) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.5
The Directed Energy Deposition (DED) is a representative metal additive manufacturing method. Owing to its strong point of repairment, its application is gradually spreading in aerospace applications, power generation, military components, and mold making. 5-axis cladding is needed to repair damage, such as wear and scratches on cylindrical surfaces to circular-shaped parts, including sleeves and liners. Furthermore, the condition of cladding on inclined parts must also be considered to prevent interference between the nozzle and the part. In this study, the effects of changes in scanning speed due to the 5-axis control system and differences from the height of laser beam irradiation due to inclination are evaluated among the items that should be additionally considered in 5-axis cladding compared to 3-axis cladding. Moreover, the trends of the width and height of the clad are identified by different tilting angles via single line cladding. Lastly, cladding methods on cylindrical surfaces at various angles are proposed to enhance the clad quality and post-processing efficacy. These results can be applied with 5-axis cladding on inclined surfaces, including cylindrical surfaces.
김영일(Yeoung-Il Kim),강민석(Min-Seog Kang) 산업기술교육훈련학회 2019 산업기술연구논문지 (JITR) Vol.24 No.4
To reduce the almost manual labor of creating a wiring diagram of a ship engine, a method of automatically generating it is proposed. The proposed method consists of two steps: First, databases for information including engine hierarchy are searched and a symbol library for various kinds of instruments in the wiring diagram is constructed. Then the wiring diagram is developed in a specific format according to the decision rules of the database and symbol library. The method is implemented on the commercial computer-assisted design/computer-assisted manufacturing (CAD/CAM) system, Unigraphics with application program interface (API) routines. Furthermore, it was found that the diagram generation time was shortened by applying the system to different works.