• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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• pp.263-266
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• 1995

Comtputer Aided Process Planning(CAPP) has been emerged as playing a key role in Computer Integrated Manufactunng(CIM) as the most critical link to integrate CAD and CAM. A modified variant CAPP system based on process planning rule base is developed in this paper. This CAPP system generates process plans automatically according to the GT code data provided as input. In order to execute process planning, various process planning rules are constructed in the form of decision tree and the inference engine that extracts the process plan based on the tree-structured rules are implemented.

• 산업공학
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• 제8권3호
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• pp.213-220
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• 1995

공정설계는 설계와 가공에 대한 지식을 갖고 있는 사람이 부품설계 도면의 정보를 이용, 생산 현장에서 소재를 부품으로 가공하기 위하여 필요한 가공정보들을 수집, 검토하여 상세한 작업지시를 준비하는 일련의 활동이라고 할 수 있다. 따라서 공정설계는 제품을 경제적, 효율적으로 생산하는데 필요한 체계적인 결정방식이며, 설계와 가공사이의 정보흐름을 원활하게 하여 제조공정상의 교량역할을 하는 핵심적인 부분이므로, 본 논문에서는 첨단생산시스템을 구현하기 위한 차세대가공시스템의 소과제중 하나인 "지적공정계획기술" 과제에서 기존에 상용화된 CAD/CAM(Compu-ter Aided Design / Manufacturing)시스템을 이용하여 설계와 가공의 정보를 체계화하고 지식 베이스화하여 설계정보가 생산현장까지 이어질 수 있도록 개발중인 컴퓨터를 이용한 공정설계자동화시스템(CAPP : Computer Aided Process Planning)에 대하여 기술하고자 한다.

• 대한조선학회논문집
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• 제30권2호
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• pp.1-12
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• 1993

CAD, CAE, CAM, Database, Expert System등 다종의 응용프로그램으로 구성된 CIM 환경에서 Product Model의 역할은 Data 공유를 통한 System Integration이다. 이를 위하여 Product Model은 생산 활동에 포함되는 모든 정보를 관리한다. 이러한 정보의 종류에는 형상정보, 공정정보, 일정정보, 품질정보, 그리고 기존의 관리정보가 포함된다. Product Model의 Architecture에는 Product Model Kernel, Object Schema, 모델조작언어, 그리고 사용자 인터페이스 등이 있다. Product Model 을 통하여 공유될 객체들은 모델조작언어를 통하여 정의되고 그 정의는 Object Schema에 저장된다. 본 논문에서는 Product Model의 설계와 CAPP(Computer Aided Process Planning)프로그램을 통한 프로토타입의 구현을 설명한다.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1994년도 춘계공동학술대회논문집; 창원대학교; 08월 09일 Apr. 1994
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• pp.653-659
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• 1994

Human experts have the various own knowledges to be applied in specialized domains. The fact that knowledge itself becomes more critical in the context of textile knowledge with rapid development of new fibers, automated equipments, processes and applications. Diversity of worsted spun yarns, lack of human expertise, and inconsistency among manually generated process plans in consequency of adjustment machine parameters owing to change up raw materials frequently increase the necessity of developing computer aided process planning(CAPP) systems for spinning process. Expert systems offer one of techniques to develop CAPP systems which would behave in a knowledgeable manner. Expert systems are the problem-solving computer program that can reach a level of performance comparable to that of a human expert in some specialized problem domain. This paper is described as job justification module. The job justification module performs to consult with users on which worsted spun yarn manufacturing process planning under the various factors, e.g., raw materials, machine parameters and required yarn counts. Also, the developed module informs the various knowledges relevant process planning. The job justification module offers the control parameters at each process and includes the various standard process plans as database. These knowledges are generated by facts and rules within rule bases.

• Spatial Information Research
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• 제10권4호
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• pp.515-532
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• 2002

Planning Support System (PSS), an alternative framework of computer-aided planning system combining geographic information system (GIS), urban models, and visualization tools, has been actively researched and applied in many developed countries. This paper introduces a PSS-based land use change model, What if\ulcorner PSS, by applying it to Chongju City, Korea. This model application study used the spatial database, Restricted Development Zone (RDZ), and other hypothetical land supply- and demand-related policies of Chongju City. The collaborative PSS model supported land use planning process by helping users to speedily and easily create and test policy-oriented scenarios. The study found that the fully operational PSS model was readily applicable and useful to Korean local land use planning. The paper discusses the conceptual model framework, data requirement, application process, model output, and practical usage. This study would be considered as a prototypical approach of PSS-based land use plan making for Korean cities.

• 산업공학
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• 제8권2호
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• pp.41-53
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• 1995

• 한국정밀공학회지
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• 제14권7호
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• pp.39-48
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• 1997

This paper describes the process planning system of a computer-aided design of blanking and piercing for irregularly shaped sheet metal products. An approach to the system is based on knowledge-based rules. The process planning system is designed by considering several factors, such as the complexity of blank geometry, production feasibility of products, and punch profile complexity. Therefore this system which was implemented production feasibility check and strip layout module can carry out a process planning considering a production feasibility area of both internal and external features, a dimension of blanked hole, a coner and a fillet radius for irregualrly shaped sheet metal products and generate the strip layout in graphic froms. Knowledges for process planning are extracted from plasticity theories, handbooks, relevant references and empirical know- hows of experts in blanking companies. This provides powerful capabilities for process planning system of irregularly shaped sheet metal products.

• International Journal of Precision Engineering and Manufacturing
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• 제7권1호
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• pp.3-8
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• 2006

This paper deals with an automated computer-aided process planning and die design system by which designer can determine operation sequences even if they have a little experience in process planning and die design for axisymmetric products. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, or the reduction of deviation of the distribution on the level of the required forming loads by controlling the forming ratios. Especially in die design module optimal design technique and horizontal split of die insert were investigated for determining appropriate dimensions of components of multi-former die set. Results obtained, using the modules, enable the design and manufacture of a die set for a multi-former to be more efficiently performed.

• 대한조선학회논문집
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• 제32권3호
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• pp.44-50
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• 1995

본 연구는 선체 블럭분할 작업을 지원하는 CAPP(computer aided process planning) 시스템 개발에 관한 것이며, 시스템 명은 BLOCK 이다. 시스템의 구성은 블럭분할선을 생성하는 전문가시스템과, 블럭분할선의 평가와 편집을 할 수 있는 분할 평가 및 수정 시스템으로 이루어져 있다. 전문가시스템의 추론 기법으로는 사례기반추론(case-based reasoning)기법을 이용하였다. 블럭분할선은 분할선 편집기에서 그래픽적으로 편집할 수 있고, 만족도 평가는 별도의 평가표 윈도우 상에서 할 수 있다. 전문가시스템은 웍스테이션 상에서 전문가시스템 개발 도구인 NEXPERT Object를 사용하여 개발하였다. 본 연구에서의 대상 선종은 VLCC이다.

• 한국정밀공학회지
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• 제13권4호
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• pp.43-52
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• 1996

This paper describes interactive computer procedures for design the forming sequences in cold forging. This system is implemented on the personal computer and its environment is a commercial AutoCAD system. The programming language. AutoLISP, was used for the configuration of the system. Since the process of metal forming can be considered as a transformation of geometry, treatment of the geometry of the part is a key in process planning. To recognize the part section geometry, the section entity representation, the section coordinate-redius representation and the section primitive geometru were adopted. This system includes six major modules such as input module, forging design module, forming sequence design module, die design module, FEM verification module and output module which are used independently or in all. The sequence drawing wigh all dimensions, which includes the dimensional tolerances and the proper sequence of operations, can generate under the environment of AutoCAD. The acceptable forming sequences can be verified further, using the FE simulation.