소성∙가공 (Transactions of Materials Processing)

  • 제14권5호
  • /
  • Pages.460-465
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  • 2005
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  • 1225-696X(pISSN)
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  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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열간단조시 금형과 소재간 계면열전달계수에 관한 연구

A Study of Interface Heat Transfer Coefficient Between Die and Workpiece for Hot Forging

  • 권진욱 (한국기계연구원 소재성형연구센타) ;
  • 이정환 (한국기계연구원 소재성형연구센타) ;
  • 이영선 (한국기계연구원 소재성형연구센타) ;
  • 권용남 (한국기계연구원 소재성형연구센타) ;
  • 배원병 (부산대학교 정밀기계공학과)
  • 발행 : 2005.08.01
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초록

The temperature difference between die and workpiece has been frequently caused to various surface defects. The distribution and change for the temperature of forged part should be analyzed to prevent the generation of various defects related with the temperature. The surface temperature changes were affected with the interface heat transfer coefficient. Therefore, the coefficient is necessary to predict the temperature changes of die and workpiece. In this study, the experimental and FE analysis were performed to evaluate the coefficient with a function of pressure, temperature, material, and etc. The closed die upsetting was used to measure the coefficient on pressure over the flow stress. AISI1045, A16061, and Cu-OFHC were used to analyze the effect of material. The coefficient was increased with step-up of pressure between die and workpiece. And, A16061 was larger than that of the AISI1045 and Cu-OFHC up to the five times.

키워드

참고문헌

  1. P. Dadras, W. R. Wells, 1984, Heat Transfer Aspects of Nonisothermal Axisymmetric Upset Forging, Journal of Engineering for Industry, Vol. 106, pp. 187-195 https://doi.org/10.1115/1.3185932
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  7. 염종택, 임정숙, 박노광, 신태진, 황상무, 홍성석, 2003, Ti-6Al-4V 합금의 열간성형에 대한 계면열전달계수의 결정 및 분석, 한국소성가공학회지, 제12권 제4호, pp. 370-375

피인용 문헌

  1. FEA technique of hot plate forming process using cell-typed die with cooling device vol.22, 2012, https://doi.org/10.1016/S1003-6326(12)61812-3
  2. Experimental and FE Analyses of Hot Curvature-Forming for Aluminum Thick Plate Using Grid-Typed Hybrid Die vol.20, pp.4, 2011, https://doi.org/10.5228/KSTP.2011.20.4.316
  3. FE-Analysis of Hot Forming of Al Large Thick Plate for Spherical LNG Tank Considering Cooling Performance of Grid-Typed Die vol.29, pp.11, 2012, https://doi.org/10.7736/KSPE.2012.29.11.1190