• 한국CDE학회논문집
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• 제2권1호
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• pp.1-10
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• 1997

Finding the optimum route of ship's pipes is complicated and time-consuming process. Experience of designers is the main tool in this process. To reduce design man-hours and human errors a design expert system shell and a geometric modeler is used to automate the design process. In this paper, a framework of the intelligent CAD system for pipe auto-routing is suggested, which consists of general-purpose expert system shell and a geometric modeler. The design expert system and the geometric modeling kernel have been integrated. The CADDS5 of Computervision is used as the overall CAD environment. The Nexpert Object of Neuron Data is used as the expert system shell. The CADDS5 ISSM is used as the interface that creates and modifies geometric models of pipes. Existing algorithms for the routing problem have been analyzed. Most of them are to solve the 2-D circuit routing problems. Ship piping system, specially within the engine room, is a complicated, large scale 3-D routing problem. Methods of expert system have been used to find the route of ship pipes on the main deck.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 가을 학술발표회 논문집
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• pp.371-376
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• 2004

This study presents a way to generate and manage engineering information by applying steel bridge information model with 3D shape to existing application program. ACIS solid modeling kernel is used to visualize 3D geometric shape of steel bridge on the AutoCAD program. The shape information of 3D solid model can be connected to structural design information of steel bridge by an application module based on information model. The application module for manipulating steel bridge information can be easily developed by ObjectARX programming library supporting functional expansion of AutoCAD program. End-users can use the application module without any additional environmental setup on the AutoCAD. Thus this study facilitates information management of steel bridge by using ACIS solid modeler and ISO/STEP methodology.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2001년도 춘계학술대회 논문집
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• pp.535-539
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• 2001

The aim of this paper presents to develop a computer-aided design system for water gate on AutoCAD R2000system. The developed system has been written in AutoCAD and Visua ILISP with a personal computer, and is composed four modules which are the gate-lifter input module, guide-frame input module, template input module and upgrade module. Based on knowledge-based rules, the system is designed by considering several factors, such as width and height of a water gate, material, object of product and maximum depth of water. Employing the developed system enable the designer and manufactures of water gate to be more efficient in this field, and its potential capability for enhancement included FEM(Finite Element Method) and quotation system.

• 소성∙가공
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• 제16권3호
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• pp.163-171
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• 2007

Due to the complicated character of the hemming process for automobile panels, it is very difficult to setup a consistent and reliable die design guide rule that require subtle decision of experienced experts and multiple trials during hemming die design and making. In this paper an automatic die design system of hemming units is pursued by presenting some algorithms, in which geometric data and constraints of the hemming units were converted to formula. The geometries and kinematics of all part for two kinds of hemming units, 2-link type and 4-link type were analysed kinematically to build the design algorithm. The algorithms were verified by automatic drawing used AutoCAD VBA program in example for the hemming unit design of a bonnet.

• 한국의류학회지
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• 제22권3호
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• pp.303-311
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• 1998

We developed a pattern drafting computer program using a popular CAD program for the purpose of the automatic manufacturing and education based on the concept of the easy -order-system which can easily reflect body characteristics and design favors of individuals to the ready-made clothing. The programs were written in Auto LISP which can utilise most of frictions of the Auto CAD, and the result of the design for an full-pleated skirt was shown. Also, we devised an easy way to set the location of reference points by inputting of tangential angle only for the use of the cubic spline curve which can represent body shape very well. Finally, by marking down all of symbols needed in manufacturing process, we completed the automatic pattern drafting program to make it useful as an industrial pattern without any amendment or correction in cutting and sewing operation.

• Steel and Composite Structures
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• 제18권5호
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• pp.1239-1258
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• 2015

This paper presents a master-slave constraint method, which may substitute the conventional transformed-section method, to account for the changes in cross-sectional properties of composite members during construction and to investigate the time-dependent performance of steel-concrete composite bridges. The time-dependent effects caused by creep and shrinkage of concrete are considered by combining the age-adjusted effective modulus method and finite element analysis. An efficient computational tool which runs in AutoCAD environment is developed to simulate the construction process of steel-concrete composite bridges. The major highlight of the developed tool consists in a very convenient and user-friendly interface integrated in AutoCAD environment. The accuracy of the proposed method is verified by comparing its results with those provided by using the transformed-section method. Furthermore, the computational efficiency of the developed tool is demonstrated by applying it to a steel-concrete composite bridge.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2001년도 가을 학술발표논문집 Vol.28 No.2 (1)
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• pp.538-540
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• 2001

최근 전세계적으로 치열한 시장 경쟁이 벌어지고 있는 세계화 시대에서 특히, 제조 업종에 종사하는 업체들이 살아남기 위해서는 새로운 제품들을 최적시에 시장에 출하하는 것이 최대 관건으로 등장하고 있다. 이를 극복하기 위해서는 생산성 향상에 의한 납기 단축 도모는 물론, 제품 설계에 소요되는 시간과 설계의 시행착오에 의한 납기 지연을 줄이는 것이 필수적인 과제이다. 이러한 배경으로 설계에 있어 컴퓨터를 이용하여 합리적인 설계를 이루고자 노력이 이루어지고 있다. 보통 설계하기 위해서 AutoCAD를 이용하고 있으나, 실제로 AutoCAD 환경에서 심도 있는 설계를 위해서는 개별적인 제품 하나 하나에 대한 설계를 해야한다는 제약과, 통계적인 수치값을 얻지 못한다는 한계점을 갖고 있다. 본 논문에서는 AutoCAD에서의 설계 제약을 극복하기 위해, 한 제조 회사의 설계 자동화 시스템(GDS: Gloating automatic drawing system)에서 도면에 대한 정보를 자동 생성하기 위한 응용 시스템 설계 및 구현한 사례를 보이고자 한다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2000년도 추계학술대회논문집 - 한국공작기계학회
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• pp.422-427
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• 2000

Gear design carried in former type determined a few variables like module, pressure angle, helix angle. After investigating repeatedly results obtained through stress analysis and making a determination an optimal shape, but its design process was not only complex but also difficult to get a precise profile curve from operating by hand. In this study, rotating shape of gear profile curves were generated automatically with standard spur gear, equivalent helical gear, shifted gear & pinion by using developed program which is Auto_LISP language supported in Auto-CAD. Output tooth profile by using CAE program is applied as Preprocessor for stress analysis in each contact points. This program which can be determined rapidly an optimal shape of gear will be successfully supported for Small & Medium companies designing and manufacturing gears by using Auto-CAD.

• 대한조선학회 특별논문집
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• 대한조선학회 2011년도 특별논문집
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• pp.32-35
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• 2011

Template has been widely used for hull forming process in most of shipyards. It is used to estimate the curvature of deformed shape in comparison with design shape. SHI (Samsung Heavy Industry) had used AutoKon system for ship manufacturing design in the past. The AutoKon used the global coordinate system of ship (frame, water line and so on) to create template data. It brought the mismatched angles between templates and a curved shell plate. The mismatched angle is measured by forming worker to place template on shell forming stage. However, the mismatched angle is difficult to place template with exactly required angle because the shell plates have various curvature and size. It causes incorrect shape of formed shell plates. The attached angle of template should be 90 degree to place template easily on forming shell plates. Currently, SHI has been applied GSCAD for ship manufacturing design process which is 3D solid modeling system. The GSCAD is the rule-based system which can automate 3D modeling and control the manufacturing data by rule. The rule can easily provide methods to create and automate template object with regular attached angle in comparison with AutoKon system. Therefore, SHI developed new template rule which it can automatically create template object with regular attached angle in GSCAD.

• 한국멀티미디어학회논문지
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• 제9권8호
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• pp.1010-1019
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• 2006

캐드(CAD) 시스템은 우리가 사용하는 대부분의 산업 제품을 제작하는데 필수적으로 사용되고 있는 중요한 기술로 알려져 있다. 캐드 기술은 컴퓨터 그래픽스 기술의 발달과 더불어 상업용 3차원 캐드 시스템으로 영역을 확장해 나가고 있다. 특히, 신발제조와 같은 특수한 영역의 캐드 시스템들도 3차원 캐드로 발전해 나가고 있다. 그러나 캐드 소프트웨어의 개발의 어려움으로 인해 소수의 메이저급 캐드 소프트웨어 회사를 제외하고는 대부분이 3차원 개념을 제공하는 AutoCAD에 종속적인 소프트웨어를 개발하고 있다. 뿐만 아니라 실제의 작업 현장에서 일하는 많은 신발 캐드 디자이너들은 직접 신발 디자인을 종이에 그리는 교육을 받아 3차원 캐 보다는 2차원 캐드에 더 익숙하고, 작업 효율도 훨씬 뛰어남을 보이고 있다. 이에 본 연구에서는 현장 실무자들의 작업 방식과 3차원 캐드 소프트웨어가 주는 장점을 결합한 3차원 신발 캐드 시스템을 설계 할 것이다. 본 시스템은 다른 신발 캐드 시스템들과 달리 OpenGL을 기반으로 하여 어느 플랫폼에서 잘 작동하도록 설계할 것이다. 또한 3차원 신발 설계 시스템에서 가장 중요한 부분인 3차원 캐드데이터와 2차원 캐드 데이터의 호환 방법을 제시하고, 다양한 크기의 신발 제작에 필수적인 여러 할출(grading) 기법을 제시할 것이다.