Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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The Prediction of Interfacial Heat Transfer Coefficient According to Contact Time and Pressure in Forging and Casting Die Materials for the Hot Press Forming

핫프레스포밍용 주조, 단조 금형에 대한 시간과 압력에 따른 대류열전달계수의 예측

  • 김낙현 (부산대학교 정밀가공시스템 대학원) ;
  • 강충길 (부산대학교 기계공학부, 정밀정형 및 금형가공 연구소)
  • Received : 2010.09.14
  • Accepted : 2010.10.01
  • Published : 2010.10.01
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Abstract

Nowadays there has been great interest in using heat treated cast material for press dies due to several advantages like reduction in die production costs. However, in hot press forming processes H13 forged tool steel is mostly used. Cooling performance of dies in hot press forming processes is considered as an important factor of study and also the IHTC parameter between cast material die and sheet metal should be considered as an essential. In the present study, the IHTC was calculated for the sheet metal in the hot press forming process with cast and forged material dies. The temperature measurements were performed for the sheet metal, casting and forged material dies by applying various contact pressure in hot press forming. IHTC was calculated and studied by adopting the inverse heat convection method in DEFORM-2D. Each IHTC was considered as a function of contact time and contact pressure. The experimental data were compared with calculated data obtained from the proposed equation and references.

Keywords

References

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