• Title/Summary/Keyword: auto-parts

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Technological Capability Building and Changes in R&D Networks in the Korean Automotive Industry (한국 자동차부품산업의 기술능력 형성과 연구개발 네트워크의 변화)

  • 심상완;이공래
    • Journal of Technology Innovation
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    • v.8 no.1
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    • pp.49-71
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    • 2000
  • This paper looks at "network" aspects of research and development (R'||'&'||'D) with a special focus on small and medium (S'||'&'||'M) automotive part makers in Korea. It throws light on recent changes in the technological capability building mechanism of Korean automotive firms. The Korean automotive firms have mostly built up technological capability from scratch. It is widely acknowledged that they have benefited from two cooperative relations: namely (1) the close cooperative relationship with their own assemblers and (2) technical assistance from auto parts makers abroad. Too much emphasis on these two links can, however, keep us from understanding new developments. This paper argues that auto parts firms have diversified their networks for technological development. It is based on the analysis of the data drawn from the survey on technological development activities of small and medium sized firms, which was carried out by the Korea Federation of Small and Medium Business. Many automotive firms have recently increased joint R'||'&'||'D links with university and/or research institution while their reliance on foreign sources have decreased.

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CAE based risk prediction for sharp edge improvement (샤프엣지 개선을 위한 해석적 리스크 검토법)

  • Nam, Byeung Gun;Park, Shin Hee;Kim, Hyun Sup
    • Journal of Auto-vehicle Safety Association
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    • v.6 no.2
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    • pp.36-42
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    • 2014
  • In order to prevent the sharp edge during the side impact, a cause analysis and CAE based risk prediction were carried out in this study. It was found that sharp edge occurs mainly because of stiffness difference between the major parts and structural stress concentration. It could be improved by directly reinforcing the crack initiation region or by weakening the joints connecting the parts. The fracture criterion based on major in-plain strain was suggested and the risk prediction process for sharp edge prevention was established.

Shock Resistance Characteristic of Auto Focus Actuator using Finite Element Method and Drop Impact Test (유한요소해석과 낙하충격 실험을 통한 자동초점 액추에이터의 내충격 특성 향상)

  • Shin, Min-Ho;Kim, Hyo-Jun;Park, Gyusub;Kim, Young-Joo
    • Transactions of the Society of Information Storage Systems
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    • v.9 no.2
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    • pp.56-61
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    • 2013
  • The recent increased use of mobile phone has resulted in a technical focusing on reliability issues related to drop performance. Since mobile phone may be dropped several times during their use, it is required to survive common drop accidents. The plastic injection parts such as base stopper and carrier in the encoder type actuator can be broken easily in the actual reliability test of 1.5m free drop. So, we analyzed the shock resistance characteristics of auto focus actuator with variables in the material properties using finite element method. By applying the new resin materials, we can decrease the breakage of plastic injection parts and improve the reliability of mobile phone.

Development of a computerized production control system for auto-parts manufacturing processes under flexible production schedule (유동적 생산계획 하의 자동차부품 생산공정 전산화방안에 관한 연구)

  • 박재영;신영석;문기주
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.18 no.33
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    • pp.63-70
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    • 1995
  • Most of small-to-medium sized companies use computer to manage and control their manufacturing system. However, it is real hard to find a company which uses the system properly. There are several reasons. First of all, appropriate software to satisfy user's needs is not available and there is lack of mind to computerize. Therefore, this paper focuses to show difficulties which they will encounter, develop a model of computerized production management system and define proper level of computerization. An experimental system has been developed for an auto-parts manufacturing company using IBM-PC in the environment of MS-DOS and CA-Clipper.

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Improvement of Structure for Single-piece Side-otr reinforcement applied Hot-stamping (일체형 핫스템핑 사이드 아우터 레인프 개선 구조 연구)

  • Lee, Hae Hoon;Wee, Sung Gae;Kim, Won Gun;Park, Dae Myoung
    • Journal of Auto-vehicle Safety Association
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    • v.10 no.3
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    • pp.13-19
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    • 2018
  • This research is to optimize Single-Piece Side otr reinforcement using Hot-stamping and to strengthen weak regions on Single-Piece Side otr reinforcement. As a consequence, the weight and the number of parts were reduced and resulting in improvement of impact and stiffness performance when compared to multi-piece construction.

The Optimized Knee Bolster Structure for US-NCAP (북미 강화NCAP 무릎상해 대응용 최적 니볼스터 구조 연구)

  • Paek, Chang In;Choi, Kyu Sang;Jung, Jae Yoon
    • Journal of Auto-vehicle Safety Association
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    • v.4 no.1
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    • pp.18-22
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    • 2012
  • The US-NCAP was rated by the head and chest injury, but the new US-NCAP requires various dummy injury parts such as head, neck, chest, and femur. So, new restraint systems are needed. Particularly, the knee bolster must meet both unbelted and belted test condition requirements. This paper analyzed the dummy response of both test condition and suggested a knee bolster F-D requirement as well as a new knee bolster structure.

A Development of on Auto Inspection System for Automotive Valve-Seal using Standalone Vision (독립형 비전을 이용한 자동차용 Valve-Seal의 자동 검사시스템 개발)

  • Lee, Kyu-Hun;Kim, Yong
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.8
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    • pp.71-80
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    • 2007
  • In this study, an inspection system for valve seal of automotive parts using standalone vision has been developed and presented. The system is comprised of eight CCD cameras, and mechanism that loads the automotive parts to the system for the inspection. An image processing algorithm for detecting two different types of defects of valve seals are developed and the effectiveness of the algorithm is experimentally verified. Inspection process is completed in 0.7 second with acceptable accuracy condition. It is envisaged that this inspection system will have a wide application in the automotive part manufacturing industry in the future.

Development of Process Planning System for Cold Forging of Non-axisymmetric Parts (비축대칭 제품의 냉간단조 공정설계시스템의 개발)

  • 이봉규;권혁홍;조해용
    • Transactions of Materials Processing
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    • v.11 no.5
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    • pp.405-413
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    • 2002
  • A process planning system for cold forging of non-axisymmetric parts of comparatively simple shape was developed in this study. Programs for the system have been written with Visual LISP in AutoCAD. Shape of the product must be drawn with the solid line and the hidden line, and with the plane and front view, as well. At the plane, the system recognizes the external shape of non-axisymmetric portions - the number of the sides of the regular polygons and the radii of circles inscribing and circumscribing the polygon. At the front view, the system cognizes the diameter of axisymmetric portions and the height of the primitive geometries such as polygon, cylinder, cone, concave, convex, etc. The system perceives that the list developed from the solid line must be formed by the operation of forward extrusion or upsetting, and that the list developed from the hidden line must be formed by the operation of backward extrusion. The system designs the intermediate geometries again by considering clearance between workpiece and die, and then finally the billet diameter, in reverse order from the finished product, on the basis of volume constancy and using the operations, the forming sequence, the number of operations and the intermediate geometries which were already designed. The design rules and knowledges for the system were extracted from the plasticity theories, handbook, relevant reference and empirical knowledge of field experts. Suitability of the process planning was analyzed using SuperForge of FVM simulation package. The results of analysis showed good formability.

Identification of Forming Limits of Sheet Metals for Automobile Parts by Asymmetric Deep-drawing Experiments (비대칭 시편의 딥드로잉 실험에 의한 박판금속의 성형한계도)

  • Heo, Hun;Lee, Chung-Ho;Jeong, Jae-Ung
    • Transactions of Materials Processing
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    • v.7 no.1
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    • pp.81-93
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    • 1998
  • Identification of forming limits of sheet metals is an important task to be done before the sheet metal forming processes. The information of the forming limit is indispensable for design of deformed shapes and related forming processes. This procedure becomes more important than ever as the auto-body becomes complicated and the number of auto-body parts is reduced for lower production cost. To identify the forming limit of sheet metals stretching with a hemispherical punch has gained popularity because of the convenient experimental procedure. The stretching experiment however has localized deformation or the shear band is originated from the non-unifrom deformation in the critical circum-stance instead of the absolute criterion. More accurate information of the forming limit therefore could be obtained by a more appropriate experiment to the real process. In this papaer an experiment program is devised to practivally identify the forming limits of sheet metals for auto-body parts. The experiment program contains not only stretching but deep-drawing Both forming experiments use the same hemispherical punch while they use different specimens. Deep-drawing experiments use speci-mens cut out in circular arc on both sides of circular blank to make it torn during the deep-drawing They also use speciments cut out straight in one side of a circular blank to make it deformed unevenly which causes local deformation during the deep-drawing. The experimental result demonstrates that the forming limit diagrams in the two cases show difference in their effective magnitude. The forming limit curve from deep-drawing is located lower than that from stretching. It is noted from the result that the deep-drawing process causes acceleration of localized deformation in comparison with the stretching process. From the experimental result the maximum value of forming limit could be pre-dicted for safe design.

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