• Title, Summary, Keyword: Assembly System

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Design and Implementation of the Automatic cable assembly test system that can test cable assembly effectively

  • Jang, Ki-Mang
    • Journal of the Korea Society of Computer and Information
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    • v.23 no.7
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    • pp.1-10
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    • 2018
  • In this paper, we propose the principles and design details of Automatic cable assembly test system and show its utility. Testing the cable assembly is required periodically or non-periodically in the system that the cable assembly performance is quite important like military equipment. There are several weaknesses when humans test the cable assembly manually. It not only takes much time but also could happen human error. To improve these disadvantages, I developed Automatic cable assembly test system. The system can be implemented by building switching control system that connect and disconnect the cable assembly and measuring devices. Through the result of the cable assembly test with this test system, we show this system makes test time short and improves of test reliability as compared with manual test.

Development of Automatic Selection of Assembly Direction and Assembly Sequence Correction System (조립 방향 자동 판별 및 조립 순서 자동 수정 시스템 개발)

  • Park, Hong-Seok;Park, Jin-Woo
    • Korean Journal of Computational Design and Engineering
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    • v.18 no.6
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    • pp.417-427
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    • 2013
  • Assembly direction is used in order to confirm the generated assembly sequences in an automatic assembly sequence planning system. Moreover, assembly sequence planners can ascertain the feasibility of a sequence during simulation with assembly direction based in a CAD environment. In other words, assembly direction is essential for sequence optimizing and automatic generation. Based on the importance of assembly direction, this paper proposes a method to select the best direction for the generated assembly sequence using disassembly simulation and geometrical common area between assembled parts. Simultaneously, this idea can be applied to verify the generated assembly sequence. In this paper, the automatic selection of assembly direction and sequence correction system is designed and implemented. The developed algorithms and the implemented system are verified based on case study in the CAD environment.

Design of Cluster Type Assembly System for Lens Module of Phone Camera (폰 카메라 렌즈모듈의 Cluster Type 조립시스템 설계)

  • Song J.Y.;Lee C.W.;Jung Y.W.;Kim Y.G.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.974-977
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    • 2005
  • Automatic lens assembly system is used for automatically assembling the lens module of phone camera. In this paper, we are trying to develop the cluster type automatic lens assembly with standard tray for applying for assembly field directly. This paper proposes the principle of cluster type lens assembly system and the related assembly production line concept for optimal automatic lens production line.

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Implementation and Evaluation of Automatic Assembly System from Manual Assembly Process of Small-sized Motor (소형 모터의 수 조립 공정의 자동 조립 시스템 구축 및 평가 체계)

  • Mok, Hak-Soo;Cho, Jong-Rae;Kim, Myoung-Lyoul
    • IE interfaces
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    • v.12 no.1
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    • pp.32-42
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    • 1999
  • This paper proposes and implementation procedure for an automatic assembly system from a manual assembly and an evaluation method of implemented several automatic system alternatives using an AHP (Analytic Hierarchy Process) in a small-sized motor. First, the current product is redesigned for DFA (Design For Assembly) and assembly automation of motor, and then it is decided mechanisms of moving, magazining, feeding, composing of each part using main joining equipment and auxiliary equipment. Following the decided mechanism, the necessary assembly machines are selected or designed considering objectives and assembly conditions. Finally, the layout alternatives are completed for the automatic assembly system. According to the evaluation criteria which are established in advance, the automatic system alternatives are analyzed using AHP.

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A Knowledge-based System for Assembly Process Planning (조립 공정계획을 위한 지식기반 시스템)

  • Park, Hong-Seok;Son, Seok-Bae
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.5
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    • pp.29-39
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    • 1999
  • Many industrial products can be assembled in various sequences of assembly operations. To save time and cost in assembly process and to increase the quality of products, it is very important to choose an optimal assembly sequence. In this paper, we propose a methodology that generates an optimal assembly sequence by using the knowledge of experts. First, a product is divided into several sub-assemblies. Next, the disassembly sequences of sub-assembly are generated using disassembly rules and special information can be extracted through the disassembly process. By combining every assembly sequence of sub-assemblies, we can generate all the possible assembly sequences of a product. Finally, the expert system evaluates all the possible assembly sequences and finds an optimal assembly sequence. It can be achieved under consideration of the parameters such as assembly operation, tool change, safety of part. basepart location, setup change, distance, and orientation. The developed system is applied to UBR(Unit Bath Room) example.

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Implementation of an Assembly System for Automobile Side Panel Based on Digital Manufacturing Technologies (디지털 제조기술 기반의 차체 사이드패널 조립시스템 구현)

  • Park, Hong-Seok;Choi, Hung-Won
    • Journal of the Korean Society for Precision Engineering
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    • v.23 no.11
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    • pp.68-77
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    • 2006
  • Nowadays, the increasing global competition forces automobile manufacturer to increase quality and to reduce the cost and time for manufacturing planning. To solve these problems, automobile manufacturers try to apply digital manufacturing technologies. In this paper, a concept of method for planning the digital assembly system is proposed. Based on the requirements of assembly tasks obtained through product analysis, the function and sequence modeling for assembly process is executed using the IDEF0 and UML model. For implementation of digital assembly system, the selected components are modeled by using 3D CAD tools. According to the system configuration strategy, lots of the alternative solutions for the assembly system are generated. Finally, the optimal assembly system is chosen by the evaluation of the alternative solutions with TOPSIS(Technique for Order Preference by Similarity to Ideal Solution) method. According to proposed procedure, digital laser welding system is implemented in DELMIA.

An Assembly Modeling System for Dynamic and Kinematic Analysis (동역학 및 기구학적 해석을 위한 조립체 모델링 시스템)

  • 김성환;이건우
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.13 no.1
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    • pp.48-58
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    • 1989
  • An assembly modeling system, with which a designer can interactively create an assembly of components ready for the dynamic analysis, has been developed. In this system, an assembly model is created from the mating conditions between the components in the assembly, and then most information required for the dynamic or kinematic analysis packages are derived. For this development, the following problems have been solved; the creation of assembly data structure, the derivation of the joint information, the inference of each component's position, and the creation of the joint coordinate systems. Through this work, the designer can easily model an assembly by assigning mating conditions, and check the dynamic or kinematic performance with the automatic creation of inputs for the assembly analysis packages.

Control of a Two-Arm Robot System for Assembly in Highy Uncertain Environment (불확실한 환경에서 조립을 수행하는 두 대의 로봇 팔 제어)

  • Jeong, Seong-Yeop;Gang, Gyeong-Dae;Lee, Du-Yong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.12
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    • pp.3072-3079
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    • 2000
  • Assembly tasks are often performed by one robot with fixtures. This type of assembly system has low flexibility in terms of the variety of parts and the part-presentation the system can handle. This paper addresses assembly without fixtures using two-manipulator robot. An active method using force feedback is proposed for the peg-in-hole assembly in highly uncertain environment. Assembly states are defined as status having unique motion constraints and events are modeled as variation of the environmental force. The states are recognized through identification of the events using two 6-d. o. f. force/moment sensors. The proposed method is verified and evaluated by experiments with round peg-in-hole assembly.

Static Structural Analysis on the Mechanical behavior of the KALIMER Fuel Assembly Duct

  • Kim, Kyung-Gun;Lee, Byoung-Oon;Woan Hwang;Kim, Young ll;Kim, Yong su
    • Nuclear Engineering and Technology
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    • v.33 no.3
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    • pp.298-306
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    • 2001
  • As fuel burnup proceeds, thermal gradients, differential swelling, and inter-assembly loading may induce assembly duct bowing. Since duct bowing affects the reactivity, such as long or short term power-reactivity-decrement variations, handling problem, caused by top end deflection of the bowed assembly duct, and the integrity of the assembly duct itself. Assembly duct bowing were first observed at EBR-ll in 1965, and then several designs of assembly ducts and core restraint system were used to accommodate this problem. In this study, NUBOW-2D KMOD was used to analyze the bowing behavior of the assembly duct under the KALIMER(Korea Advanced Liquid MEtal Reactor) core restraint system conditions. The mechanical behavior of assembly ducts related to several design parameters are evaluated. ACLP(Above Core Load Pad) positions, the gap distance between the ducts, and the gap distance between the duct and restraint ring were selected as the sensitivity parameter for the evaluation of duct deflection.

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A Note on the Reversibility of the Two Stage Assembly Scheduling Problem

  • Yoon, Sang-Hum;Lee, Ik-Sun;Sung, Chang-Sup
    • Management Science and Financial Engineering
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    • v.13 no.1
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    • pp.25-34
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    • 2007
  • This paper is concerned with proving a conjecture that the two stage assembly system is reversible in deterministic makespan scheduling context. The reversibility means that a job sequence in the assembly system has the same makespan as that of its reverse sequence in the disassembly system which is the reversal of the assembly system. The proposed conjecture shows that the reversibility of serial flowshops can be extended to non-serial and synchronized shops.