• 대한조선학회논문집
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• 제30권3호
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• pp.90-99
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• 1993

선체 구조해석에서 유한요소의 활용에 따라 3차원적인 모델이 필요하게 되었으나 선체구조는 매우 복잡하고 주문생산에 따른 선체규격의 상이함에 의해 유한요소 모델링에 어려움이 많다고 할 수 있다. 유한요소 소프트웨어에서 제공하는 pre-processor나 geometric modeler를 활용하여 모델링을 짧은 시간내 편리하게 하기 위해서는 DB에 저장된 설계 데이타로 부터 요소형성에 긴요한 데이타들을 추출하여 사용할 필요가 있게 된다. 본문에는 engineering database의 부분적인 구현 예로서, 설계-해석 자동화의 한 분야인 유한요소 모델링에 필요한 내용들이 설계 데이터로 부터 추출되어 관계형 데이타 테이블로 정형화되는 과정이 개념적으로 나타나 있다.

• 한국콘텐츠학회논문지
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• 제5권5호
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• pp.17-25
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• 2005

본 논문은 PCB 생산 자동화를 위한 데이터 변환 시스템을 구현한다. CAD로 설계한 데이터는 PCB 생산라인과의 데이터 호환을 이루지 못하기 때문에 데이터 호환을 갖는 자동화 시스템이 필요하다. 본 논문에서는 PCB 생산 자동화를 위한 PCB 부품 정보를 분석하고 IC 부품 정보를 DB로 구축한다. CAD 설계자의 Human error 검출 알고리즘을 개발하고, PCB 생산 라인에 적합한 데이터로 변환하는 알고리즘을 개발한다. PCB 생산라인의 부품의 정보 추가, 수정하기 위한 데이터 변환 인터페이스를 설계 및 구현한다. 기존의 수작업 공정을 자동화함으로서 처리속도를 대폭 개선하였으며, 신뢰성 있는 칙적화된 데이터로 PCB 생산 자동화에 일조를 할 수 있다.

• 한국정밀공학회지
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• 제19권7호
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• pp.116-124
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• 2002

The planning of part feeder and other manufacturing automation equipments is almost always underestimated. Planning ahead for those crucial pitfalls can permit steps to take to minimize heir impacts, especially if the problems can be discovered in the planning phase, not on the shop floor. Planning process is an engineering process, namely a series of trade-offs. The effective trade-offs in the shortest amount of time can be possible with the help of a computer-aided ngineering (CAE) technique. The main parts of CAE fur part feeder are database system of fabricated workpiece parts, part feeders, part feeder components. In this study, a planning process of part feeder is presented. Especially, a systematic analysis of workpiece parts and part feeders is performed for the design of databases of CAE system.

• International Journal of Automotive Technology
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• 제7권2호
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• pp.217-226
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• 2006

To maintain competitiveness in the modern automotive market, it is important to carry out process planning concurrently with new car development processes. Process planners need to make decisions concurrently and collaboratively in order to reduce manufacturing preparation time for developing a new car. Automated generation of a simulation model by using the integrated process plan database can reduce time consumed for carrying out a simulation and allow a consistent model to be used throughout. In this research, we developed a web-based system for concurrent and collaborative process planning and flow analysis for an automotive general assembly using web, database, and simulation technology. A single integrated database is designed to automatically generate simulation models from process plans without having to rework the data. This system enables process planners to evaluate their decisions quickly, considering various factors, and easily share their opinions with others. By using this collaborative system, time and cost put into the assembly process planning can be reduced and the reliability of the process plan would be improved.

• 소성∙가공
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• 제9권2호
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• pp.112-119
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• 2000

The roll Pass design is one of the most important processes to design the whole equipment of the rods and bars rolling system. In this study, the roll pass design program named TollRo(Rolling Factory Organizer) was developed. conventional methods to design roll pass were analyzed and a new algorithm to design the dimension of the intermediate groove was introduced. Object oriented programming technology was implemented in this design program. It comprises GUI(Graphic User Interface), function of automatic pass design, function of modifying pass schedule and database of material properties. The developed program can be used to design roll pass with consistency for the rods and bars rolling system. The man-hours for the whole design can be drastically reduced. The design parameters of rolling system can be extracted quickly by this program.

• 대한기계학회논문집A
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• 제24권11호
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• pp.2713-2722
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• 2000

When designing a gear drive, designers should specify tolerances reasonably considering accuracy, cost, and manufacturing capability. In field design, however, designers mostly assign adequate tolerance without correlations between parts and assembly, resulting in iterative design dependent on experts know-how. In order to resolve this, the tolerance design system for a cylindrical gear drive is developed both to support tolerance design automation and to synthesize design processes of part and assembly tolerances. In this research, part tolerances are designed with the databases constructed by ISO, Ks, JIS and bearing catalogue, Assemble tolerance, that is, backlash tolerance is designed by synthesizing part design tolerances stochastically using the formulated assembly relations. This system can include part tolerance and fitting accuracy of shaft adn bearing in practical design. In addition, this system provides field-designers with a synthetic guideline for tolerance design of a gear drive.

• 한국CDE학회논문집
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• 제12권4호
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• pp.308-320
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• 2007

A multi-agent and web based engineering framework concerning the automation of fatigue durability analysis for welded bogie frame of railway vehicles is presented. Mostly, this kind of design or analysis includes complex workflow, huge amounts of information processing, and problem solving. Macro programs of I-DEAS, APDL of ANSYS, and in-house fatigue code are utilized for parametric geometry representation, automatic mesh generation, static stress analysis, fatigue durability analysis, post-processing, and data sorting. The engineering framework is implemented on the JADE. Since every task requires a fairly complex process and specialized knowledge, the multi-agent based framework is very useful to keep the independency among several disciplines or tasks and to use distributed hardware and software resources. All engineering programs are integrated by XML wrapper. Related database of the engineering framework and web based user interfaces are also developed. A parametric study is carried out to take into account the effect of geometrical change of transom support bracket on its cumulative fatigue damage. The developed engineering framework reduced remarkably the time and costs required in designing and solving engineering problems.

• 대한산업공학회지
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• 제15권2호
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• pp.77-86
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• 1989

A fully automated cost estimation system(FACES) has been developed. Since speed, accuracy, and consistency are essential factors in automating a cost estimation, the use of computers in cost estimation system(CES) has grown rapidly in the last few years. FACES is a micro computer based cost estimation system that employs a manufacturing knowledge base. A Group Technology(GT) based part classification and coding(C&C) scheme is used to automate the process planning aspects of cost estimation. Variant process planning methods are employed to generate workstation routings from form features of the part. The system has been tested for an assembly of six machined parts. Results indicate that the system could provide a substantial improvement in accuracy, productivity, and performance over the more traditional full dialog approach to cost estimation. It also provides a good foundation for a factory automation by using a common GT based database through design to production.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2004년도 추계 종합학술대회 논문집
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• pp.412-416
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• 2004

본 연구는 PCB 생산 자동화를 위한 데이터 변환 인터페이스를 설계하였다. CAD로 설계한 PCB 부품 정보를 분석하여 Human error 검출 알고리즘을 개발하였고, IC 부품들에 관한 정보를 DB로 구축하였으며 데이터호환을 위한 알고리즘과 인터페이스를 설계하였다. 기존의 수작업 공정을 자동화함으로서 1-2일 정도의 시간을 수분 이내로 단축시킬 수 있도록 하였다.

• 연구논문집
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• 통권30호
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• pp.169-176
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• 2000

The Evolution of Workflow Managment consists of rhe automation of business procedures or "workflows" during which documents, information or tasks are passed from one participant to another in a way that is governed by rules or procedures. Workflow technologies have evolved from image management system, document management system, relational or object database systems, and electronic mail system. Workflow Management system has the benefits to improve better efficiency, process control,flexibility, business process. Automation of many business processes results in the elimination standdardizing working methods. Consistency in the processes leads to greater predictability in levels of response to customers and software control over processes enables their re-design in line with changing business needs, In this present study, we implement Electronic Approval System which is a kind of Workflow Management system using static and dynamic flow control information on the web environment.