• Title/Summary/Keyword: Virtual assembly

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Implementation of Concurrent Engineering for Large Assembly Design: Part(II) -Developmen of a Digital Mock-Up System for Reducin Design Changes- (부품수가 많은 조립체 설계를 위한 동시공학의 구현: Part (II) -설계 변경을 줄이기 위한 Digital Mocj-Up 시스템의 개발-)

  • 정융호
    • Korean Journal of Computational Design and Engineering
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    • v.2 no.2
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    • pp.103-110
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    • 1997
  • In the development of large complex assembly, most design changes are from the following reasons.: 1) insufficient consideration of assembling sequence of downstream process. 2) interference and fit-up of related parts. 3) initial design changes which are not completely resolved. In order to reduce the first reason of above, the assembly-centric modeling methodology was proposed in the part (1) of the thesis. In this part (2), a Digital Mock-Up system, which is a tool to build a virtual mock-up in design stage, has been developed in order to prevent the other two reasons. The system can build a virtual assembly in various ways as followings.: 1) assembling parts which are located in user defined envelope. 2) assembling parts with the specified disciplines. 3) assembling parts that are selected in the part list. It can also make an assembly by the combination of above methods. In addition to that, it has the functions to read/write the virtual assembly and to explode parts of the assembly in desired direction. With the virtual assembly, engineers can design interference free parts without making physical mock-up. The system has been implemented with Oracle database management system in CATIA environment.

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A Study on the Development of an Electronic Component Assembly Training System Using Leap Motion (Leap Motion을 이용한 전자부품 조립 훈련 시스템 개발에 관한 연구)

  • In-Chul Lee
    • Journal of the Korean Society of Industry Convergence
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    • v.26 no.3
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    • pp.463-470
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    • 2023
  • In this study, an electronic parts assembly training system using Leap Motion was developed in consideration of the processes actually operated in the assembly process of electronic products. Based on Leap Motion and Oculus VR equipment, the system was developed to transfer user's hand movement data in real time and convert it into hand movement in virtual space so that electronic parts assembly simulation can be performed step by step. Through this, it was confirmed that the user can obtain an experience similar to the actual electronic parts assembly work, prevent errors that may occur during the assembly process, and improve proficiency. It is expected that this thesis will provide directions for the quality improvement and development of various education and training programs for virtual reality-based manufacturing processes.

Virtual Assembly Analysis Tool and Architecture for e-Design and Realization Environment

  • Kim, K.Y.;Nnaji, Bart-O.;Kim, D.W.
    • Korean Journal of Computational Design and Engineering
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    • v.9 no.1
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    • pp.62-76
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    • 2004
  • Many customers are no longer satisfied with mass-produced goods. They are demanding customization and rapid delivery of innovative products. Many companies are now realizing that the best way to reduce life cycle costs is to evolve a more effective product development paradigm using Internet and web based technologies. Yet there remains a gap between current market demands and product development paradigms. The existing CAD systems require that product developers possess all the design analysis tools in-house making it impractical to employ all the needed and newest tools. Hence, this paper addresses how assembly operation analysis can be embedded transparently and remotely into a service-oriented collaborative assembly design environment. A new assembly operation analysis framework is introduced and a relevant architecture and tools are developed to realize the framework. Instead of the current sequential process for verifying and validating an assembly design, a new Virtual Assembly Analysis (VAA) method is introduced in the paper to predict the various effects of joining during actual collaborative design. As a case study, arc welding and riveting processes are investigated. New service-oriented VAA architecture and its VAA components are proposed and implemented on prototype mechanical assemblies.

A Parallel Sequence Extraction Algorithm for Generating Assembly BOM (조립 BOM 생성을 위한 병렬순서 추출 알고리듬)

  • Yeo, Myung-Koo;Choi, Hoo-Gon;Kim, Kwang-Soo
    • Journal of Korean Institute of Industrial Engineers
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    • v.29 no.1
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    • pp.49-64
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    • 2003
  • Although assembly sequence planning is an essential task in assembly process planning, it is known as one of the most difficult and time consuming jobs because its complexity is increased geometrically when the number of parts in an assembly is increased. The purpose of this study is to develop a more efficient algorithm for generating assembly sequences automatically. By considering subassemblies, a new heuristic method generates a preferred parallel assembly sequence that can be used in robotic assembly systems. A parallel assembly sequence concept provides a new representation scheme for an assembly in which the assembly sequence precedence information is not required. After an user inputs both the directional mating relation information and the mating condition information, an assembly product is divided into subgroups if the product has cut-vertices. Then, a virtual disassembly process is executed to generate alternate parallel assembly sequences with intermediate assembly stability. Through searching parts relations in the virtual disassembly process, stable subassemblies are extracted from translation-free parts along disassembling directions and this extraction continues until no more subassemblies are existed. Also, the arithmetic mean parallelism formula as a preference criterion is adapted to select the best parallel assembly sequence among others. Finally a preferred parallel assembly sequence is converted to an assembly BOM structure. The results from this study can be utilized for developing CAAPP(Computer-Aided Assembly Process Planning) systems as an efficient assembly sequence planning algorithm.

Virtual Manufacturing for an Automotive Company(VI) : Material Addressing and Analysis using Digital Virtual Factory for General Assembly Shop (자동차 가상생산 기술적용(VI) : 디지털 가상공장을 이용한 조립공장 자재배치 및 검토)

  • Lee, Kang-Gul;Kang, Hyoung-Seok;Noh, Sang-Do
    • IE interfaces
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    • v.21 no.1
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    • pp.131-140
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    • 2008
  • To shorten product development time and cost, integrated information managements of product, manufacturing process and resource are essential. In the area of material addressing, process engineers should make their decisions in the manner of collaborative engineering in order to reduce the manufacturing preparation time and cost in the product development and production. A digital virtual factory which is an united digital model of entire factory could be very useful for these areas. In this paper, the digital virtual factory is constructed and used for material addressing and analysis of an automotive general assembly shop. We developed the material addressing system for automotive general assembly shops using digital virtual factory models and nesting algorithms, and applied it to realistic problems of a Korean automotive company as an convenient and effective way of material addressing.

Development of Virtual Assembly Process for the Fabrication of Micro-fluidic Systems Using Micro-stereolithography Technology (마이크로 광 조형 기술을 이용하여 미세 유체 시스템을 개발하기 위한 가상 조립 공정의 개발)

  • 강현욱;이인환;조동우
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2004.04a
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    • pp.304-309
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    • 2004
  • As it is difficult to construct a micro-fluidic system composed of micro-mixers, micro-channels and/or micro-chambers in a single process, an assembly process is typically used. The assembling and bonding of micro-parts, however, introduces other problems. In this work, a virtual assembly process was developed that can be used to design various micro-fluidic systems before actual fabrication commences. In the process, the information required for the micro-stereolithography process is generated automatically. Consequently, complex micro-fluidic systems can be fabricated in a single process, thereby avoiding the need for additional assembly or bonding processes. Using the developed process, several examples were fabricated.

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Development of Virtual Prototype for Labeling: Unit on the Automatic Battery Manufacturing Line (건전지 자동화 조립라인의 라벨링부의 Virtual Prototype 개발)

  • 정상화;차경래;김현욱;신병수;나윤철
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.04a
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    • pp.357-362
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    • 2002
  • Most of battery industries are growing explosively as a core strategy industry for the development of the semi-conductor, the LCD, and the mobile communication device. In this thesis, dynamic characteristics of the steel can labeling machine on the automatic cell assembly line are studied. Dynamic characteristic analysis consists of dynamic behavior analysis and finite element analysis and is necessary for effective design of machines. In the dynamic behavior analysis, the displacement, velocity, applied force and angular velocity of each components are simulated according to each part. In the FEA, stress analysis, mode analysis, and frequency analysis are performed for each part. The results of these simulations are used for the design specification investigation and compensation for optimal design of cell manufacturing line. Therefore, Virtual Engineering of the steel can labeling machine on the automatic cell assembly line systems are modeled and simulated. 3D motion behavior is visualized under real-operating condition on the computer window. Virtual Prototype make it possible to save time by identifying design problems early in development, cut cost by reducing making hardware prototype, and improve quality by quickly optimizing full-system performance. As the first step of CAE which integrates design, dynamic modeling using ADAMS and FEM analysis using NASTRAN are developed.

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Development of Virtual Prototype for Separator Winding and Inserting Machine of Battery Assembly Line (건전지 세퍼레이터 와인딩 및 삽입시스템의 Virtual Prototype 개발)

  • 정상화;차경래;신병수;나윤철
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.727-730
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    • 2002
  • Most of battery industries are growing explosively as a core strategy industry for the development of the semi-conductor, the LCD, and the mobile communication device. Dynamic characteristic analysis consists of dynamic behavior analysis and finite element analysis and is necessary for effective design of machines. In the dynamic behavior analysis, the displacement, velocity, applied force and angular velocity of each components are simulated according to each part. In the FEA, stress analysis, mode analysis, and frequency analysis are performed far each part. The results of these simulations are used for the design specification investigation and compensation for optimal design of cell manufacturing line. Virtual Engineering of the separator inserting machine on the automatic cell assembly line systems are modeled and simulated. 3D motion behavior is visualized under real-operating condition on the computer window. Virtual Prototype make it possible to save time by identifying design problems early in development, cut cost by reducing making hardware prototype, and improve quality by quickly optimizing full-system performance. As the first step of CAE which integrates design, dynamic modeling using ADAMS and FEM analysis using NASTRAN are developed.

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Implementation of AR based Assembly System for Car C/pad Assembly (차체 C/Pad 조립을 위한 증강현실 기반의 조립시스템 구현)

  • Park, Hong-Seok;Choi, Hung-Won;Park, Jin-Woo
    • Journal of the Korean Society for Precision Engineering
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    • v.25 no.8
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    • pp.37-44
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    • 2008
  • Nowadays, the increasing global competition forces manufacturer to reduce the cost and time for implementation of manufacturing system. The AR(augmented reality) technology as a new human-machine interface introduces a noteworthy perspective for a new manufacturing system design. Using AR technology, a physically existing production environment can be superimposed with virtual planning objects. Therefore, the planning tasks can be validated without modeling the surrounding environment of the production domain during short process planning time. In this paper, we introduce the construction of AR browser and determine the optimal environment parameters for field application of AR system through lots of tests. And, many methods such as multi-marker coordinate system, division of virtual objects and so on, are proposed in order to solve the problems suggested from initial field test. Based on these tests and results, the test-bed of C/Pad assembly system is configured and robot program for C/Pad assembly is generated based on AR system.

Development of an Assembly-free Process for Micro-stereolithography Technology (마이크로 광 조형기술에서의 통합성형공정의 개발)

  • 이인환
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.9
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    • pp.182-187
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    • 2004
  • As it is difficult to construct a micro-fluidic system composed of micro-mixers, micro-channels and/or micro-chambers in a single process, an assembly process is typically used. The assembling and bonding of micro-parts, however, introduces other problems. In this work, a virtual assembly process was developed that can be used to design various micro-systems before actual fabrication commences. In the process, the information required for the micro-stereolithography process is generated automatically. Consequently, complex micro-fluidic systems can be fabricated in a single process, thereby avoiding the need fur additional assembly or bonding processes. Using the developed process, several examples were fabricated.