• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.52.4-52
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• 2001

In this paper we propose a framework of an open architectured manufacturing system base on CORBA middleware. The manufacturing system consists of four configurable software modules 9mchine control module, database module, monitoring module, and operation module). Each module is distributed through the network and integrated with CORBA middleware technology. CORBA Characteristics including independence from programming languages, computing platforms and networking protocols makes us to easily develop new applications and to effectively integrate new module into existing distributed systems. The CORBA program used in this study is The ACE ORB (TAO) developed by the laboratory in Washington University.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1999년도 제14차 학술회의논문집
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• pp.177-180
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• 1999

Nowadays, one of the major technical issues in manufacturing is to create an environment to promote collaboration among diverse engineering activities. Collaborative engineering is an innovative approach integrating widely distributed engineering activities through promoting information sharing and actual collaboration. It requires close interactions among developers, suppliers and customers, and consideration of entire product life cycle from concept to disposal. A carefully-designed operating system is crucial for successful collaboration of many different activities in a Networked Virtual Manufacturing System(NVMS). High extensibility, flexibility and efficiency ale the key characteristics requested of an operating system to handle the complexity of the NVMSs. In this paper, we propose a model of the operating system for collaborative engineering using concurrent quasi-procedural method(QPM). QPM is a goal-driven data management technique for distributed and parallel computing environments. It is to be applied to the evaluation of activities to be executed, validities of input data, execution path of activities for a needed output, and expected to greatly improve the productivity of operations by preventing redundant evaluations. Collaboration among many different engineering activities in NVMSs is to be performed by the network of agents that encapsulate the capabilities of both users and their tools.

• 산업경영시스템학회지
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• 제43권3호
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• pp.10-20
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• 2020

This paper presents a method to measure the similarity of assigned jobs in the gravure printing operation based on the chromaticity and color sequence, and order the jobs accordingly. The proposed dispatching rule can be used to fulfill diverse manufacturing site requirements because the parameters can be adjusted to prioritize chromaticity and color sequence. In general, dispatching rules either ignore the job-changing time or require that the time be clearly defined. However, in the gravure printing operation targeted in this study, it is difficult to apply the general dispatching rule because of the difficulties in quantifying the job-changing time. Therefore, we propose a method for generalizing assignment rules of the job planner, allocating relative similarity among assigned jobs, and determining the sequence of jobs accordingly. Chromaticity priority is determined by the arrangement of the color assignments in the printing operation; color sequence priority is determined by the addition, deletion, or change in a specific color sequence. Finally, the job similarity is determined by the dot product of the chromaticity and color sequence priorities. Implementation of the proposed dispatching rule at an actual manufacturing site showed the planner present the same job order as that obtained using the proposed rule. Therefore, this rule is expected to be useful in industrial sites where clear quantification of the job-changing time is not possible.

• 산업공학
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• 제17권4호
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• pp.450-458
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• 2004

S-Distribution Center supplies parts to three plants of K-automobile manufacturing company. Since the three plants employ the JIT production system, it is important for S-Distribution Center to deliver small quantities of parts frequently and quickly on time. This paper presents a case study on the improvement of order-picking operation in S-Distribution Center. The study is focused on the reductions of move time and waiting time by redesigning the parts storage location, picking-order terminal location, retrieval policy, and equipment operation policy. The proposed operation system for S-Distribution Center is evaluated through a simple computation analysis and computer simulation. Furthermore, the reducible numbers of equipment and order pickers are investigated by performing a sensitivity analysis.

• 항공우주시스템공학회지
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• 제13권1호
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• pp.54-61
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• 2019

3D프린팅은 '12년 세계경제포럼에서 떠오르는 10대 기술 중 2번째로 선정이 되었고 기존 산업의 패러다임을 변화시켜 제조업 혁신과 신 시장을 창출할 핵심기술로 대두되었다. 미국 등 주요 선도 국가들은 3D 프린팅을 국방 분야에 적극 확대해 나가고 있으며, 우리나라 역시 3D 프린팅의 군사적 활용을 위해 국방 수리부품 생산기술 확보 및 국방전문인력 양성을 추진하고 있다. 이에 본 논문은 기존의 무기체계 개발단계, 양산단계, 운영유지단계의 부품 국산화 개발관리 절차를 활용하여 향후 신뢰성 있는 3D 프린팅 수리부품을 효율적으로 작전현장에 적용하기 위한 방안을 제시하였다.

• 한국통신학회논문지
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• 제19권10호
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• pp.1935-1944
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• 1994

FMS(Flexible Manufacturing System)는 로봇, 수치제어기기 등의 프로그램이 가능한 생산설비 하드웨어로 구성된 분산시스템이다. FMS의 효과적인 운용을 위해서는 생산설비 하드웨어를 통합 제어하기 위한 소프트웨어의 존재가 필수적이다. 그런데 FMS의 복잡성과 다양한 변화가능성은 통합제어 소프트웨어의 구축 및 유지, 보수를 어렵게 한다. 이를 해결하기 위하여 본 논문에서는 객체지향 FMS 통합제어 모델을 제안한다. 제안된 모델에서는 FMS에 실재하는 셀이 가상 셀 객체로 모델되어, 통합제어를 위하여 필요한 데이터와 연산들이 캡슐화되어 객체지향 데이타베이스에 관리된다. 또한 이 밖의 FMS운용을 위해 필수적인 데이타와 이들간의 관계성도 데이타베이스에 관리된다. 본 논문은 제안된 모델을 기반으로 구현한 통합제어 소프트웨어시스템인 FREE(Fms Run Time Executive Environment)를 바탕으로 통합제어 데이타베이스에 대하여 기술한다.

• 한국생산제조학회지
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• 제20권5호
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• pp.653-658
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• 2011

In general, the purpose of packaging fasteners is a series of management activities to maintain the condition at the time of production until they get delivered to the end user. An automatic packing system for fasteners is consisted of bucket conveyor, slide feeder, vision inspection system, box-magazine conveyor system and automatic packing machine. Also, the automatic packing machine is consisted of six modules including charging device, clamping/opening device, sealing/cutting device, feeding/air-shower device, supplying/adjusting device and device frame, etc. In this paper, we proposed an automatic packing mechanism of the one station concept for packing work of fastener objects where the continuous batch work is performed in a finite space. The proposed one-station packing mechanism has been optimized through mechanical, dynamical, structural and fluid analyses. And it had been manufactured as the prototype of automatic packing machine. The field test for validation of performance was performed directly at the production line of bolt and screw. In the field test, this packing machine showed an efficiency of about 4.5 times the manual operation. It also showed 30% reduction in the consumption of packing materials compared to the manual operation. This automatic packing machine for fastener objects will be commercialized soon.

• 한국컴퓨터정보학회논문지
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• 제25권11호
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• pp.115-122
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• 2020

본 논문에서는 실시간 공정능력관리 기반의 MES(Manufacturing Execution System) 시스템과 해당 시스템을 활용한 제조 업무 수행 절차에 대해서 제안한다. 현 MES 시스템은 제조 현장을 쉽게 인지할 수 있는 KPI(Key Performance Indicator) 리포트는 제시하지만, 실질적 제조 현장의 KPI 향상을 위한 개선 방안은 도출하지 못하고 있다. 즉, 불량률 증가, 수율 감소, 생산 리드 타임(Lead-Time) 증가의 궁극적 원인을 발췌하여 개선 방안을 도출하고, 이를 제조 현장에 적용하는 부분에는 어려움이 있다. 본 논문에서 제안하는 실시간 공정능력관리 기반의 MES 시스템은 공정능력지수를 결정하는 설비 주요 인자의 산포도를 실시간으로 관리하여, 기존 MES 시스템의 한계점을 극복한 제조 운영 관리시스템 구축이 목적이다. 그리고, 실시간 대용량 데이터 처리를 위한 속도개선 방안을 제시하여, 해당 시스템이 잘 운영될 수 있도록 적용하려고 한다.

• 한국산학기술학회논문지
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• 제7권2호
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• pp.238-245
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• 2006

본 연구는 제조기업에서 업무 상 비용절감과 처리속도를 빠르게 할뿐만 아니라, 향후 업무환경 변화에 능동적으로 대처할 수 있는 통합 경영관리시스템을 설계하는 데 있다. 현재 판매되고 있는 범용 경영관리시스템은 많은 추가적인 노력없이는 각 기업의 고유업무를 반영하는 데에 한계점이 있으므로, 본 연구에서는 예측생산 및 주문생산 전략을 동시에 가지는 자동차부품 제조업체를 대상업체로 선정하여 해당업체의 업무에 특화하여 경영관리시스템을 설계하였다. 시스템설계는 전체 시스템의 각 기능 모듈에 대하여 불필요한 업무처리의 발생을 줄이기 위한 장치를 추가함으로써 제품원가에 반영되는 제조 간접비의 발생을 최소화하도록 하였다. 또한 구축될 시스템에 현장상황이 적시에 반영되어 시스템의 출력이 실효성을 가질 수 있도록 하기 위해 각 기능 모듈간의 연계성을 고려하였으며 현장상황을 관찰하는 모니터링 모듈과 각 기능모듈간의 데이터 흐름을 원활히 할 수 있도록 시스템을 설계하였다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2005년도 춘계공동학술대회 발표논문
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• pp.1101-1107
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• 2005

Mold industry has the difficulty to employ young people as the successors of the skilled workers, because it has been regarded as a 3D-jobs(dirty, difficult, and dangerous). To overcome this situation, thus, manufacturing technologies maintained in the factory should be systemized, and engineering systems should support unskilled workers to do their jobs without any difficulty. As a research of developing the supporting system, this study proposes a decision support system that facilitates unskilled workers to easily select high quality NC-data, as well as to increase productivity. The proposed system is assumed to follow a CAM operation scenario that consists of next three steps: 1) identifying several process plans and enumerating feasible unit machining operations (UMOs) from material and part surface information, 2) creating all feasible NC-data based on UMOs using a commercial CAM system, 3) selecting the best NC data among the feasible NC data using four screening criteria, such as machining accuracy, machining allowance, cutting load, and processing time. A case study on the machining of a camera core mold is provided to demonstrate the proposed system.