Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Prediction of Dimensions of Cold Forgings Considering Springback of Material and Elastic Deformation of Die

소재의 탄성회복과 금형의 탄성변형을 고려한 냉간단조품의 치수 예측

  • 전병윤 (경상대학교 수송기계부품기술혁신센터) ;
  • 강상명 (㈜삼광공업) ;
  • 박재민 (큐빅테크) ;
  • 이민철 (경상대학교 기계공학과 대학원) ;
  • 박래훈 (경상대학교 기계공학과 대학원) ;
  • 전만수 (경상대학교 기계항공공학부)
  • Published : 2005.08.01
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Abstract

In this paper, a systematic attempt for estimating geometric dimensions of cold forgings is made by finite element method and a practical approach is presented. In the approach, the forging process is simulated by a rigid-plastic finite element method under the assumption that the die is rigid. With the information obtained from the forging simulation, die structural analysis and springback analysis of the material are carried out. In the springback analysis, both mechanical load and thermal load are considered. The mechanical load is applied by unloading the forming load elastically and the thermal load is by cooling the increased temperature due to the plastic work to the room temperature. All the results are added to predict the final dimensions of the cold forged product. The predicted dimensions are compared with the experiments. The comparison has revealed that predicted results are acceptable in the application sense.

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References

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