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- 저자 : Fuh-Kuo Chen (검색결과 2 건)
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On the die face design for stamping an automotive engine hood
Ming-Zhi Chen,Fuh-Kuo Chen,Shi-Wei Wang,Ching-I Lin 한국소성가공학회 2010 기타자료 Vol.2010 No.6
The die face design for stamping an engine hood was examined in the present study using both the finite element analysis and the experimental approach. Since the engine hood is mainly manufactured in the drawing operation, the die addendum design is the key to the success of manufacturing a defect free product. In order to analyze the addendum design, the existing die addendum designs corresponding to those engine hoods were reviewed first and the design parameters were established. The preliminary study was then performed to determine favorable operation conditions including the suitable stamping die angle, blank-holder surface shape, and die open line. The optimum design for the die addendum face was then investigated with the use of finite element simulations. The effects of the design parameters constructed in the present study on the occurrence of the defects were examined and a systematic design guideline was proposed. In order to validate the proposed die design, the actual stamping tooling was manufactured according to the finite element analysis and the engine hoods were produced. The part shape, thickness distribution, and the stretch at the central region of the production part were compared with those obtained from the finite element simulations. The consistent agreement between the product parts and the simulation results confirms the validity of the design guide proposed in the present study for stamping an engine hood.
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Influence of Deposition Parameters on the Structure and Optical Property of Zn(S,O) Films
Du-Cheng Tsai,Bing-Hau Kuo,Zue-Chin Chang,Erh-Chiang Chen,Fuh-Sheng Shieu 대한금속·재료학회 2017 METALS AND MATERIALS International Vol.23 No.1
This paper presents the influence of process parameters, including sputtering power, oxygen partial pressure (RO), and substrate temperature on the optical property of Zn(S,O) thin films fabricated by radio frequency magnetron sputtering technology and deposited on glass substrates. The chemical composition, structural and optical properties of the samples were investigated by electron spectroscopy for chemical analysis, X-ray diffraction, and spectrophotometer. All the films mainly exhibited β-ZnS phase with (111) preferred orientation. [S]/([S]+[O]) ratio increased at high sputtering power, low RO, and low substrate temperature. Moderate ranges in sputtering power and substrate temperature and low RO resulted in large grain size. Adatoms are expected to exhibit increased mobility under these conditions. Average transmittance exceeded 75% in the visible wavelength region. Bandgap under these conditions was dominated strongly by the change in grain size and [S]/([S]+[O]) ratio. Optical properties of Zn(S,O) thin films could be modified, which is promising for optoelectronic applications.
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