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Browsing by Author "C . H . Suh"

Browsing by Author "C . H . Suh"

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  • A Study on the Thermal Deformation Simulation of Spur Gear According to the Heat Zones in Heat Treatment Process 
    Jin-Rok Kim; Seong-Ho Yun; Yun-Chul Jung; C . H . Suh; T. H. Kwon (The Korean Society Of Manufacturing Process Engineers, 2020-07)
    In order to improve fatigue life of transmission gear carburizing is normally used. Carburizing is a very goodprocess to achieve low cost and high performance. The machined gears are heated up to carburizing temperatureand ...
  • CTBA Tubular Beam의 열간 성형해석 및 실험 
    C . H . Suh; Woo-Sung Kim; Jihyun Sung; J. K. Park; 김용식; Kim Young Suk (The Korean Society For Technology Of Plasticity, 2015-02)
    For an accurate analysis of hot stamping, a coupled simulation with different aspects of the process(i.e. mechanical, thermal, and phase transformation) is needed. However, coupled simulations are time consuming and costly. ...
  • DED방식의 적층가공을 통한 금형으로의 응용사례 및 효과 
    Woo-Sung Kim; Jihyun Sung; Myoung-Pyo Hong; 김양곤; C . H . Suh; 이종원; 이성희 (The Korean Welding and Joining Society, 2014-08)
    Laser aided Direct Metal Tooling(DMT) process is a kind of Additive Manufacturing processes (or 3DPrintingprocesses), which is developed for using various commercial steel powders such as P20, P21,SUS420, H13, D2 and other ...
  • Optimization of the Hot Workability for an Extrude AZ80 Mg Alloy using the Processing Map and Kriging Meta- Model 
    S. K. Oh; 이광기; Young-Sang Na; C . H . Suh; Yun-Chul Jung; Kim Young Suk (Korean Society for Precision Engineering, 2015-06)
    Mg alloy has a hexagonal close-packed(HCP) lattice crystal structure, which has fewer slip systems than other structures, and plastic deformation is difficult to achieve at room temperature. To improve its workability, the ...
  • SCMH2 고속회전축재의 표면처리조건에 따른 VHCF 피로특성에 관한 연구 
    서창민; C . H . Suh; 서민수 (The Korean Welding and Joining Society, 2013-08)
    SCMH2 steel is widely used in the industrial members of car and tractor. This study focused onmaterial properties and evaluation technology of the SCMH2 steel regarding the surface treatment followedby carburizing and ...
  • 고강도 소재의 인장과 저주기피로 물성치의 연관성에 관한 연구 
    박명규; C . H . Suh (The Korean Society For Technology Of Plasticity, 2014-04)
    Low cycle fatigue characteristics are very important in the development of automobile suspension parts. Fatigue properties using the strain life approach are usually obtained from low cycle fatigue tests. However, low cycle ...
  • 고온 압축 공정에서 금형과 알루미늄 빌렛의 접촉 열전달 계수 도출에 관한 연구 
    C . H . Suh; H . W . Jeon; S. K. Oh; T. H. Kwon; G.P.Kang; H.S.Yook (The Korean Society For Technology Of Plasticity, 2021-06)
    In hot forging analysis, the interfacial heat transfer coefficient (IHTC) is a very important factor defining the heat flow between the die and the material. In particular, in the hot forging analysis of aluminum 6xxx ...
  • 곡선형 냉각채널 금형을 사용한 프론트 필라 핫스탬핑 공정에서 금형냉각시간이 기계적 특성에 미치는 영향 
    Jaejin Lee; Dakyung Kang; C . H . Suh; Yonghee Lim; Kyunghoon Lee; Soosik Han (The Korean Society Of Manufacturing Process Engineers, 2019-06)
    Researchers have recently begun to study hot stamping processes to shorten the mold cooling time and improve productivity. These publications explain that the mold cooling time can be reduced by using a curved cooling ...
  • 금형 열전도율에 따른 핫스탬핑 공정 냉각 특성 연구 
    Kyunghoon Lee; M. U. Jung; J. S. Seok; C . H . Suh (The Korean Society For Technology Of Plasticity, 2018-06)
    In this study, the cooling characteristics of dies were investigated in the hot stamping process of front pillars for automobile. Two identical dies were manufactured out of tool steels with different thermal conductivities. ...
  • 다구찌기법을 이용한 공압피팅용 원형 판스프링의 설계변수 최적화 
    T. H. Kwon; C . H . Suh; 이락규; S. K. Oh; 정윤철; 임환빈 (대한기계학회, 2013-12)
    공압피팅은 공압이 사용되는 시스템 및 기계에서 작동유체를 공급하기 위한 유연호스의 접속 및탈착을 원활히 할 수 있게 하는 공압 시스템의 핵심 요소이다. 공압피팅의 구성요소인 원형 판스프링의응력분포를 유한요소해석을 통하여 살펴본 결과 원형 판스프링은 공압피팅에 유연호스가 장착 될 때국부적인 소성변형이 일어나는 것으로 나타났다. 원형 판스프링의 응력집중을 분산시키기 위해 다구찌실험계획법을 이용하여 ...
  • 비선형 열전달 계수를 사용한 알루미늄 6082 빌렛의열간 압축 공정 해석 
    H . W . Jeon; C . H . Suh; T. H. Kwon; C. D. Park; J . H . Jeon; H. Y. Choi; G . P. Kang (The Korean Society For Technology Of Plasticity, 2019-02)
    In order to reduce the weight of automobile parts, automobile parts using aluminum alloy are being developed. Aluminum alloy for automobile parts is mainly made of Al6xxx (Al-Mg-Si) type alloy, which is excellent in hot ...
  • 사각판재 보론강을 사용한 유체냉각공정에서의 열변형 해석 
    C . H . Suh; T. H. Kwon; H . W . Jeon; S. K. Oh; C. D. Park; H. Y. Choi; W. S. Moon (The Korean Society For Technology Of Plasticity, 2017-02)
    Fluid cooling is one of the manufacturing processes used to control mechanical properties, and is recently used for hot stamping of automobile parts. The formed part at room temperature is heated and then cooled rapidly ...
  • 열유동 해석을 통한 핫프레스 포밍 금형의 냉각 성능 평가 
    Kyunghoon Lee; 이재진; C . H . Suh (The Korean Society For Technology Of Plasticity, 2016-08)
    CFD simulation with FlowVision® is used to evaluate the capability of cooling channel in hot press forming dies. Two different types of cooling channels, dry drilled and pocket types are considered for comparison. Two ...
  • 원통형 보론강을 사용한 가열-급냉공정에서의 열변형 해석 
    C . H . Suh; T. H. Kwon; 강경필; H. Y. Choi; 김양수; Kim Young Suk (The Korean Society For Technology Of Plasticity, 2014-12)
    Water quenching is one method of cooling after hot forming, which is presently being used for the manufacturing of automobile parts. The formed parts at room temperature are heated and then cooled rapidly in a water bath ...
  • 자율주행 자동차용 전동회전시트 상부회전판의 핫스탬핑 성형에 관한 연구 
    육형섭; 편종권; C . H . Suh; S. K. Oh; T. H. Kwon; Byungki Kim; Park Dong Kyou (The Korean Society Of Manufacturing Process Engineers, 2021-10)
    Seats in autonomous vehicles must be able to rotate to fully utilize the interior space. Generally, ultra-highstrength steel is used for the rotation module because it should have high strength and high rigidity. In ...
  • 초고강도 소재가 적용된 U 형 채널 제품의 다단공정변수에 따른 스프링백 영향 
    C . H . Suh; Yun-Chul Jung; 임용희; 윤효윤; 이경훈; Kim Young Suk (대한기계학회, 2012-03)
    자동차 부품의 경량화를 위해서 초고강도강의 사용이 확대됨에 따라 판재성형 공정에서 초고강도 강판의 스프링백 제어의 중요성이 점차로 확대되고 있다. 본 연구에서는 초고강도 소재를 사용한 U 형 채널 부품의 성형을 위해서 사용되는 다단공정에서 공정 변수들이 스프링백에 미치는 영향에 대하여 검토하였다. 해석을 위해서는 유한요소법이 사용되었으며, 주요 공정 변수는 공정수, 금형 각도, 금형 반경, ...

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