Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Three Dimensional Layering Algorithm for 3-D Metal Printing Using 5-axis

3 차원 금속 프린팅을 위한 다중 3 차원 적층 알고리듬(3DL)

  • Ryu, Sua (Dept. of Mechanical Engineering, Hongik Univ.) ;
  • Jee, Haeseong (Dept. of Mechanical System Design Engineering, Hongik Univ.)
  • 류수아 (홍익대학교 기계공학과) ;
  • 지해성 (홍익대학교 기계시스템디자인공학과)
  • Received : 2014.04.21
  • Accepted : 2014.05.27
  • Published : 2014.08.01
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Abstract

The purpose of three-dimensional (3-D) metal printing using 5-axis is to deposit metal powder by changing the orientation of the deposited structure to be built for the overhang or undercut feature on part geometry. This requires a complicated preprocess functionality of providing three dimensionally sliced layers to cover the required part geometry. This study addresses the overhang/undercut problem in 3-D metal printing and discusses a possible solution of providing 3-D layers to be built using the DMT(R) machine.

5 축 기반 3 차원 금속 프린팅에서는 파트형상에 overhang/undercut 형상이 존재하여도 tilting과 rotating의 2 축을 이용하여 파트형상의 조형 방향을 자유롭게 바꾸어 지지구조물(support structure) 형상피처의 추가 없이 3-D 적층(3DL: 3-D layering)이 가능하게 된다. 이를 위해서는 overhang/undercut의 형상근처에서 국부적으로 tilting과 rotating 정보에 맞는 조형 층 적층 정보를 제공하는 새로운 전처리기(preprocessor) 기능이 필요하게 된다. 본 논문에서는 overhang/undercut 과 같은 형상들을 자동으로 진단하고 검출하여 3 차원 layering 이 가능할 수 있도록 방사형 기울기 측정법(calculation of radial gradient: CRG)과 은유적 자동 분할 알고리듬(implicit auto-partitioning algorithm: IAP)을 통해 다중 적층 알고리듬(Multi-part Layering Algorithm: MPL)을 구현함을 제시하고 이를 실제 STL 형상파일에 적용하여 제시된 이론을 검증하고자 하였다.

Keywords

References

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