Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Evaluation of the Formability of Warm Forming Simulation of Magnesium Alloy Sheet Using FLD

마그네슘 합금 판재의 온간 성형 해석에서 FLD를 이용한 성형성 평가

  • 이명한 (서울대학교 대학원) ;
  • 김흥규 (한국생산기술연구원 정밀금형팀) ;
  • 김헌영 (강원대학교 기계.메카트로닉스 공학부) ;
  • 오수익 (서울대학교 기계항공공학부)
  • Published : 2008.11.01
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Abstract

In this study, a forming magnesium alloy circular cup was simulated accounting for heat transfer at elevated temperatures. In order to predict the failure of magnesium alloy sheet during simulation, the forming limit diagram, which is used in sheet metal forming analysis to determine the criterion for failure, was investigated. For the failure prediction in the simulation accounting for heat transfer, the forming limit diagram for a temperature the same as the temperature of the blank element was used. The result of the simulation showed that the drawn depth increases with the increase of the die-holder temperature, and is in accord with the experimental results above the die-holder temperature of $150^{\circ}C$. The forming limit diagram provided a good guide for the failure prediction of warm forming simulation accounting for heat transfer. In addition, the effect of the tool shoulder radius on the drawn depth at various tool temperatures is verified using the simulation conditions which agreed with the experimental results.

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References

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