• Title/Summary/Keyword: Machine Layout

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Network-type Cell Layout in Cellular Flexible Assembly Systems (셀형유연조립시스템에서의 네트웍형 셀배치)

  • 노인규;최형호
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.19 no.39
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    • pp.63-73
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    • 1996
  • With the success of flexible manufacturing systems (FMSs), flexible assembly systems (FASs) have been developed to automate factories further. As in a cellular FMS, a cellular FAS is considered as the most flexible and feasible assembly system configuration Because of the differences between manufacturing and assembly operation, the logic of cell formation and cell layout between a FMS and a FAS is not the same. Since the time for assembly operation is usually relatively short, the transfer time is thus very crucial for the performance of assembly systems. Therefore in assembly systems it is important to reduce the transfer time by sequencing operations efficiently and arranging machines like the sequences. The network-type layout is not only feasible for the machine arrangement based on operation sequences, but it has also layout flexibility. Therefore it is a reasonable layout configuration for cellular FASs. This paper presents a method for the cell layout based on the network-type layout in a cellular FAS design.

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Design of component layout and tool path for machining multiple components

  • 이창근;임석철
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 1996.04a
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    • pp.610-614
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    • 1996
  • In machining muliple components fixed on the same pallet of a NC machine, it is very important to minimize the total time required to finish the machining by carefully determining the component layout on the pallet, and the tool path of NC machine, and the sequence of tools to be used. In this paper, a linear integer programming model is presented to obtain an efficient layout; and a two-phased heuristic algorithm is proposed to minimize the total time for machining multiple components. Numerical examples are given for the case of identical components and nonidentical components, respectively. The result of either case shows significant reduction of 7.2~15.0% in the total time required to finish the machining.

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Machine Layout Problem in a Production Line (생산공정의 기계배치문제)

  • Han, Min-Hong
    • Journal of Korean Institute of Industrial Engineers
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    • v.15 no.1
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    • pp.31-39
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    • 1989
  • The throughput of a production line can be improved by a proper layout of machines and also by meterial flow control between machines. This paper presents a heuristic method of determining machine layout in one-dimensional space to reduce travel distance of material transporters. The heuristic method is compared to an optimum solution method to measure its performance.

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The study on the interactive approach for the system layout design of Fexible manuafcturing cell (반송기능을 고려한 FMC의 구성설계에 관한 연구)

  • Kim, Jang-Hyung
    • Journal of the Korean Society for Precision Engineering
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    • v.3 no.2
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    • pp.16-27
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    • 1986
  • The problems concerning FMC (Flexible manufacturing cell) system layout were treated in this paper. In fact, there being no clear definition about FMS (Flexible manufacturing system), it could be treated as the system adopting flexible-automation and FMS has been improving as a form of parts machining system. It was thought that the problems of combination of machine tool groups and parts family were important. Parts familly and machine tool groups were made up by means of multivariate analysis and the minimum trnsfer concept using correlation coefficient ($\rho$). And FMC system was layout by directional graph according to the FMS classifications.

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A Study on Even Distribution of Workloads Using Simulated Annealing Method on Integrated Layout Design in Cellular flexible Assembly Systems (셀형 유연조립시스템에서 작업부하 균형을 고려한 통합 배치설계에 관한 연구)

  • 정지용;노인규
    • Journal of the Korean Operations Research and Management Science Society
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    • v.23 no.4
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    • pp.63-73
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    • 1998
  • With the success of flexible manufacturing systems(FMSs), flexible assembly systems(FASs) have been developed to automatic factories further. As in a cellular FMS, a celluar FAS is considered as the most flexible and feasible assembly systems configuration. This paper presents a method for the integrated layout design in cellular FASs. Unlike the traditional paper, this paper deals with the formation of cells and the layout of cells for jobs with operation times on different machines. The procedure in this paper consists of two distinct phases. The first phase presents machine arrangement in a double rows flowline. cell formation not to allow intercellular movements, and integrated layout design in cellular FASs considering the characteristics of FAS, layout, and production factors This phase uses older optimal algorithm. The second phase proposes to balance the system with an objective of reducing the degree of workload deviation in the cells. Simulated annealing method is used to balance the system. This phase also shows the integrated layout design in cellular FASs with the cost less than total cost of the first phase.

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Comparative study of the performance of pure and hybrid flow lines using computer simulation (시뮬레이션에 의한 복합형 흐름라인 간의 성과 비교)

  • 이진춘
    • Journal of the Korea Society for Simulation
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    • v.4 no.1
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    • pp.75-86
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    • 1995
  • There has been a great deal of interest in the area of group technology recently. They suggest that group technology's formation of cells of machines which are dedicated to production of families of parts will bring many of the advantages of cellular layout of job shops. In this context, Yoon [2] designed and suggested 3 types of the layout structure for a small firm, by introducing the cellular layout into the traditional flow line of an existing factory. Also he found that P5C, i.e. process layout /5 cells layout, outperformed the rest types. However, he performed the experiments in the standpoint of the existing factory operation and did not consider other operating methods including changing the dispatching and sequencing rules. Therefore, in this paper, we compared the performance of 3 different layout by the simulation technique using the real data from the existing factory, considering a newly suggested dispatching and machine selection rule.

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A Base Study on In-situ Production Layout of Free-form Concrete panels by System Dynamic (동적 분석기법을 이용한 비정형 콘크리트 패널의 현장생산 배치 기초연구)

  • Lim, Jeeyoung;Lee, Taick-Oun;Kim, Sunkuk
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.05a
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    • pp.154-155
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    • 2016
  • Although there is an increase in demand for free-form buildings, there are several problems such as increased cost and duration and decreased constructability arising from difficult member production and installation. To solve these problems, a technology to produce free-form panels using CNC machine was developed. According to the technology, the information on free-form buildings designed is delivered to the CNC machine, a form is shaped using the delivered information and free-form concrete panels are produced using the form. The limited construction site, duration and project cost as well as interferences with other work types should be considered upon in-situ production of free-form concrete panels. Thus, the purpose of this study is to conduct a base study on in-situ production layout of free-form concrete panels by system dynamics. With this study, we will discover the causal relationship of influence factors on in-situ production of free-form concrete panels, and improved productivity is expected through the production layout.

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Analysis on the factors influencing layout for production-installation work of Free-form Concrete Panels in PCM mold (PCM mold 측면에서 FCP 생산-설치 레이아웃 영향요인 분석)

  • Lim, Jeeyoung;Lee, Donghoon;Kim, Sunkuk
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.121-122
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    • 2015
  • The demand on free-form buildings is gradually increasing, but there are several problems such as increased cost and construction duration, and decreased constructability at the construction phase upon construction of a building owing to the difficulty of member production-installation. To solve these problems, a technology to produce FCP using a CNC machine was developed. Basically, it delivers the information on a free-form building designed to the CNC machine, the shapes of RTM and PCM are created using the information delivered and FCP are produced with the RTM and PCM which act as forms. Since the construction duration and project cost are limited on site, the efficiency of FCP production-installation is significant for application of the technology. For it is almost impossible to change the production-installation layout and process once they are set in the construction phase, they should be carefully determined. Before the production-installation layout are established, it is necessary to analyze the factors that influence the duration. Thus, the study intends to analyze influence factors in PCM mold on estimation of the production-installation duration for FCP. According to the analysis of influence factors, a simulation model for estimation of the duration that changes depending on the constraint conditions can be built.

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A Study on a Smart Factory Layout Design Based on TOC-DBR (TOC-DBR 기반의 스마트공장 레이아웃 설계에 관한 연구)

  • Kim, Byung-Joo;Kim, Deok Hyun;Lee, In Su;Jun, Cha-Soo
    • Journal of Korean Institute of Industrial Engineers
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    • v.43 no.1
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    • pp.12-18
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    • 2017
  • This study presents a plant concept design for a smart factory which is mainly targeted to machine airplane parts. The plant layout is based on the TOC-DBR approach together with autonomous distributed factory control considered, while discrete event simulation is also performed in order to validate its layout. The resulting layout and its procedure turn out to be quite a useful guideline in realizing those smart factories especially for machining-oriented manufacturing industries.

Operation-sequence-based Approach for Designing a U-shaped Independent-Cell System with Machine Requirement Incorporated (설비능력과 작업순서를 고려한 U-라인상에서의 셀 시스템 설계)

  • 박연기;성창섭;정병호
    • Journal of the Korean Operations Research and Management Science Society
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    • v.26 no.1
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    • pp.71-85
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    • 2001
  • This paper considers a cost model for a U-shaped manufacturing cell formation which incorporates a required number of machines and various material flows together under multi-part multi-cell environment. The model is required to satisfy both the specified operation sequence of each part and the total part demand volume, which are considered to derive material handling cost in U-shaped flow line cells. In the model several cost-incurring factors including set-up for batch change-over, processing time for operations of each part, and machine failures are also considered in association with processing load and capacity of each cell. Moreover, a heuristic for a good machine layout in each cell is newly proposed based on the material handling cost of each alternative sequence layout. These all are put together to present an efficient heuristic for the U-shaped independent-cell formation problem, numerical problems are solved to illustrate the algorithm.

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