• CDE review
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• v.17 no.3
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• pp.12-17
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• 2011

• Bulletin of the Society of Naval Architects of Korea
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• v.34 no.4
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• pp.33-38
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• 1997

국내의 조선업계는 생산성 향상을 위해 10여년전 부터 CAD/CAE/CAM 시스템을 한 선박 설계 및 생산 시스템의 전산화/자동화를 꾸준히 추진해 왔으며 최근에는 CIM(Computer Integrated Manufacturing)구축을 위한 노력을 경주하고 있다. 국외에서도 CIM을 구축하기 위한 노력이 계속적으로 지속되고 있는데, 한 예로서 일본의 Hitachi 조선소는 1993년 부터 PHI(Product model by Hitachi zosen)프로젝트를 통해 CIM을 CAE, CAD, CAM, 공장 자동화(FA), 생산계획/관리 및 경영관리 등의 요소로 구성되는 컴퓨터 지원에 의한 정보의 통합적 관리라는 개념으로 정의하고, 이들 각 구성요소를 network을 통해 유기적으로 연결하므로서 설계 및 생산에 관계되는 정보를 서로 교환하고 공유할 수 있도록 추진하고 있다. 이처럼 CIM을 실현하기 위해서는 서로 다른 시스템들간의 정보를 원활히 교환하고 공유할 수 있는 환경이 구축되어야 한다.

• International Journal of CAD/CAM
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• v.2 no.1
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• pp.55-67
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• 2002

In many areas of industry, it is desirable to have fast and reliable systems in order to quickly obtain suitable solid models for computer- aided analyses. Nevertheless it is well known that the data exchange process between CAD modelers and CAE packages can require significative efforts. This paper presents an approach for geometrical data exchange through triangulated boundary models. The proposed framework is founded on the use of STL file specification as neutral format file. This work is principally focused on data exchange among CAD modelers and FEA packages via STL. The proposed approach involves the definition of a topological structure suitable for the STL representation and the development of algorithms for topology and geometry data processing in order to get a solid model suitable for finite element analysis or other computer aided engineering purposes. Different algorithms for model processing are considered and their pros and cons are discussed. As a case study, a prototype modeler which supports an exporting filter for a commercial CAE package has been implemented.

• Computational Structural Engineering
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• v.2 no.4
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• pp.5-10
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• 1989

CAD/CAM 과정에서 컴퓨터 그래픽은 매우 중요한 역할을 하고 있고, 앞으로 이 분야에서 그래픽 응용과 그 기법의 개발은 무궁할 것으로 예측된다. 또한 전 공정의 총합 CAD 과정에서 이들 컴퓨터 그래픽과 공학해석의 접속은 필수불가결할 것이다. 공학해석 분야에는 현재 유한요소법이 대종을 이루고 있으나 아직도 이러한 해석분야와 그래픽분야를 완전하게 접속시켜 전 공정의 설계를 컴퓨터로 자동화 하는데는 많은 시간이 요할 것 같다. 그러나 컴퓨터 하드웨어 값이 지속적으로 하락하고 저렴한 CAD 관련 소프트웨어가 개발될 것을 예상해 볼 때 설계 및 제작 자동화가 가까운 장래에 대단히 큰 진전을 이룰 수 있을 것으로 보인다.

• International Journal of CAD/CAM
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• v.9 no.1
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• pp.17-24
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• 2010

For several years, researchers have focused on improving the integration of the CAD, CAM and Analysis through a better communication between the various analysis tools. This tendency to integrate the CAD/Analysis and automation of the corresponding processes requires data sharing between the various tasks using an integrated product model. We are interested in this research orientation to CAD/CAM/Analysis integration by rebuilding the CAD model (BREP), starting from the Analysis results (deformed mesh). Because this problem is complex, it requires to be split into several complementary parts. This paper presents an original interoperability process between the CAD and CAE. This approach is based on a new technique of rebuilding the CAD surface model (Nurbs, Bezier, etc.) starting from triangulation (meshed surface) as a main step of the BREP solid model. In our work, the advantages of this approach are identified using a centrifugal pump example.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.04a
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• pp.108-108
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• 1996

• 기계와재료
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• v.3 no.4 s.10
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• pp.5-16
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• 1991

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.11 no.2
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• pp.89-100
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• 1993

This paper is a study on the earth volume calculation using CAD and LISP(LIST Processing) in the route alignment. The utility enlargement in the industry field and the considerable progress of computer make the automatic design and manufacture for the development of CAD/CAM/CAE technique possible, and the automatic design of civil engineering works is continuously progressive. In this study we are intend to improve an effect of civil engineering work by the automatic earth volume calculation in route alignment. This paper aims to construct the automatic design system of civil engineering work and the procedures; (1) The programming of the self-scanning program of the land information introducing Digital Terrain Model concept in the map (2) Systematic algorithm construction using LISP and grafting CAD system (3) Automatic design and calculation of the mass curve and earth volume.

• Korean Journal of Computational Design and Engineering
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• v.20 no.1
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• pp.44-54
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• 2015

Solving partial differential equations (PDEs) on a manifold setting is frequently faced problem in CAD, CAM and CAE. However, unlikely to a regular grid, solutions for those problems on a triangular mesh are not available in general, as there are no well-established intrinsic differential operators. Considering that a triangular mesh is a powerful tool for representing a highly-complicated geometry, this problem must be tackled for improving the capabilities of many geometry processing algorithms. In this paper, we introduce mathematically well-defined differential operators on a triangular mesh setup, and show some examples of their applications. Through this, it is expected that many CAD/CAM/CAE application will be benefited, as it provides a mathematically rigorous solution for a PDE problem which was not available before.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.40 no.3
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• pp.327-336
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• 2016

Manufacturers of aircraft engines have introduced computer-aided manufacturing (CAM) software to operate and control computerized numerical control (CNC) machine tools. However, the generation of a CAM model is a time consuming and error-prone task since machining procedure and operational details are manually defined. For the automatic generation of a CAM model, feature recognition techniques have been widely studied. However, their recognition coverage is limited so that complex shapes such as a jet engine cannot be fully developed. This study presents a novel approach to quickly generate a CAM model from a CAD model using shape search techniques. Once an operator sets a machining operation as a reference operation, the same shapes as the shapes referenced by the operation are searched. The reference operation is copied to the positions of the searched shapes. The proposed method was verified through experiments with a jet engine compressor case.