• Korean Journal of Computational Design and Engineering
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• v.8 no.1
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• pp.48-54
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• 2003

In a design-to-manufacturing environment, the product data is shared by various CAD/CAM/CAE systems with little integration or substantial data redundancy. The main purpose of this paper is to build a database containing all the features required for STEP-NC machining and to show how a STEP-NC repository can support the complete process for machining. A STEP-NC database schema has been constructed and several query functions have been built for the purpose of implementing the retrieving system of a STEP-NC database. The EXPRESS data model of ISO 14649 has been mapped to the database data definition language of the Oracle database. To apply the STEP-NC database to an industry example, the ISO 14649 part program has been stored into the STEP-NC database. To implement example scenarios, the sample query interface has been built.

• Transactions of Materials Processing
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• v.9 no.3
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• pp.293-303
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• 2000

Recent developments of Fe technology make it possible to apply CAD/CAE/CAM techniques successfully to the stamping die design among the automotive parts industries. Those successful applications are greatly attributable to the development of commercial S/W. Up to now most commercial S/W for the analysis of sheet metal forming is based on the dynamic explicit algorithm. The main characteristics of dynamic explicit algorithm is that there is no convergence problem if the time increment is taken less than the stability limit. The stability of the analysis is guaranteed in the commercial code, since the adequate time increment is computed from the so called "Courant Condition". However excess computing time is often pointed out in the dynamic explicit analysis according to the characteristics of process parameters taken. In the study, various parameters that may affect the stability and the method how to improve computational efficiency of analysis have been investigated.estigated.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2003.05a
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• pp.409-418
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• 2003

The dies & molds are a very economical production tool and a high value-added product because of its mass production capability compared to other production methods. Due to the very stiff international competitiveness, the industries meet many obstacles. At this moment, measured the status, the international trends and try to find the vision and strategy to promotion of the industry. In Korea, large portion of dies and molds are still low value-added and make large number of tools. In order to advance this industry to the high-tech area and gain competitiveness in the golbal marketplaces, effective means of resource investment and strategy should be properly provided.

• Computational Structural Engineering
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• v.4 no.3
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• pp.51-54
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• 1991

금성사는 뉴미디어 서비스, 컴퓨터와 종합정보 통신망의 결합 등 2000년대 신시장에 대한 적극적인 도전과 국내시장 개방에 대한 대처는 물론 주요 고기능 시스템을 운영할 수 있는 첨단 소프트웨어의 자체개발력 구축을 통한 국제 경쟁력을 강화하기 위하여 국산 워크스테이션을 개발하게 되었다. 썬사의 스팍스테이션 1과 100% 호환성을 갖는 MIRACLEstation 20은 스팍 RISC칩을 장착했고 운영체제는 썬 OS4.1, 또한 스팍스테이션에서 운용되는 모든 소프트웨어를 수정없이 사용할 수 있어 CAD/CAM/CAE, 금융, Software Engineering, Simulation, 국방, GIS 등의 분야에 3,300여종의 소프트웨어가 지원되는 워크스테이션이다. 이 제품은 207MB 하드디스크 1개와 1.44MB 플로피디스크 1개를 내장했고, 이더넷, TCP/IP, ONC/NFS를 기본 사양으로 LAN 및 WAN 환경에서 동기종 뿐만 아니라 타기종과 인터페이스를 용이하게 함으로써 워크스테이션의 필수요건인 네트워킹을 완벽하게 구현한다. 특히 국내 최초의 양산에 성공한 썬 클론 제품으로서 가격대비 성능면에서 뛰어난 제품이다.

• Korean Journal of Computational Design and Engineering
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• v.10 no.2
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• pp.77-88
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• 2005

This paper introduces a project for the development of an F-125 machine using 3D PLM systems including 3D CAD, CAM, CAE, PDM, and DMU systems. Here, the F-125 machine is a formula racing car equipped with a 125cc motorcycle engine. A development process and computer-integrated environment was established using 3D PLM systems on the conceptual basis of concurrent and virtual engineering. A DMU model for a full vehicle was built using CATIA V.5 and used to check interference between parts and to simulate assembly process. This DMU-based approach enables to find and fix manufacturing problems in the early design stage. All development activities have been done by the graduate and undergraduate students of the automotive engineering department of Kookmin University. Through the project, the students could acquire knowledge about car development process and 3D PLM systems in automotive industry.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 1994.03a
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• pp.7-34
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• 1994

;Recently the sheet forming simulation technology revealed great progress in the sense of practical application in the automotive, electric/electronics and aviation/space industries. The goal of sheet forming simulation is to embedded in the design engineering system which is consisted by the analysis and synthesis modules. This design simulation system predicts the slackness of sheet and estimate the formability, and search the optimum material/forming/structure conditions. This OVER-ALL OPTIMUM DESIGN can be classified as follow; 1. ANALYZING PROCEDURE: Numerical simulation based on nonlinear theories -geometry, material and friction nonlinearities- 2. OPTIMIZATION PROCEDURE: Optimum design based on mathematical programing and AI technologies, those are implemented in CAD/CAM/CAE System - Concurrent Engineering System-. In this paper, four subjects will be discussed; (1) State of arts of computer simulation technologies in Japan. (2)History of sheet forming simulation. (3) Benchmark problems. (4) Future technology in the sheet forming simulation.ation.

• Transactions of Materials Processing
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• v.12 no.5
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• pp.421-432
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• 2003

The dies & molds are a very economical production tool and a high value-added product because of its mass production capability compared to other production methods. Due to the very stiff international competitiveness, the industries meet many obstacles. For the promotion of the industry, the status and the international trends of the industry are measured. The vision and strategy are driven. In Korea, large portion of dies and molds are still low value-added and make large number of tools. In order to advance this industry to the high-tech area and gain competitiveness in the global marketplaces, effective means of resource investment and strategy should be properly provided.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.18 no.10
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• pp.110-115
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• 2019

Stationary and rotating blades can be found in a steam turbine generator and the airfoil shapes of these blades can be defined by point data from an aerodynamic design system. The main design process of blades is composed of two steps: first, the blade surface is modeled with the point data; and then, the section data is generated which contains composite curves with line segments and arcs for CAE of the blade. The surface is modeled by a curve-net defined by the point data, which may be extended to obtain the section data to model the blade. This paper presents methods for automating the above-mentioned steps, which have been implemented in the commercial CAD/CAM system, Unigraphics, with API functions written in C-language. Finally, the proposed methods have been applied to model the blade of a steam turbine generator.

• International conference on construction engineering and project management
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• 2009.05a
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• pp.1318-1323
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• 2009

In recent years, dramatic advances in information technology have motivated the construction industry to improve its productivity. Computer-based information technology includes Computer-Aided Design (CAD), Computer-Aided Engineering (CAE), Computer-Aided Manufacturing (CAM), Enterprise Resource Planning (ERP), Digital Mock-Up (DMU) and Product Data Management (PDM). Most construction industries are trying to apply these technologies for quality improvement, reduction of construction time and cost. PDM is very useful for managing data and process related to product design and manufacturing. PDM system has various functions such as drawing and engineering document management, product structure and structure modification management, part classification management, workflow management, and project management. In this paper, PDM system was applied to the design of steel-concrete composite girder bridge. To make a practical guidance for PDM implementation to bridge design, the procedure for its implementation was presented. Consequently, this paper could be useful to enhance the efficiency of bridge design.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.522-525
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• 2011

지금까지 제조업에서는 CAx(CAD, CAE, CAM) 시스템을 중심으로 설계와 생산의 효율성 증대를 이뤄왔다. 최근에는 제품을 중심으로 PLM(Product Lifecycle Management), 디지털 메뉴팩처링(Digital Manufacturing) 등의 개념을 도임하고 있으며, 이를 기반으로 설계와 생산의 효율성 증대뿐만 아니라, 디지털 제품을 중심으로 하는 제품 개발환경 구축을 통해 제조업의 불변과제 해결과 경쟁력 확보를 위해 노력하고 있다. 본 논문에서는 함정 설계와 정보 관리를 위한 프로세스 및 프레임워크 연구를 수행한다. 그리고 함정획득에 SBA 개념을 적용하기 위한 인프라스트럭쳐에 대해 연구를 수행한다. 객체 지향 개발방법론의 요구사항 분석법에 기반을 둔 SBA(Simulation-Based Acquisition) 프레임워크 정의 방법론을 정립하고 이를 바탕으로 3 차원 함정제품모델 중심의 획득업무 분석을 통해 SBA-NS 아키텍처와 함정제품정보(NSPI : Naval Ship Product Information) 참조모델을 정의하고자 한다.