Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Finite Element Analysis of Multistage Hot Forging Process During Mold Cooling

금형 냉각을 고려한 다단 열간 단조 공정의 유한요소해석

  • Received : 2020.03.18
  • Accepted : 2020.04.03
  • Published : 2020.05.31
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Abstract

Multistage hot forging process enables mass production of various parts at a high speed, wherein, it is important to design the forging steps in an optimal way. Finite element methods are widely applied for optimizing the forging process design; however, they present inaccurate results due to the rapid change in the mold temperature during multistage hot forging. In this study, the temperature distributions of the mold in a steady state were calculated via heat transfer analysis during mold cooling. The flow stress and friction coefficient of the material were measured according to the temperature and were applied for numerical analysis of the multistage hot forging process. Eventually, the accuracy of the analysis results is verified by comparing these results with the experiments.

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References

  1. Kim, H. J. and Jin, C. K., “Process Design Molding with Precision Hot Forging of One-Way Clutch Inner Race,” Journal of the Korean Society of Manufacturing Process Engineers, Vol. 17, No. 4, pp. 83-90, 2018.
  2. Moon, H. K., Kim, M. C., Joun, M. S., "Optimal design of forging process of the first generation hub bearing outer race considering the symmetry of metal flow lines," Proc. of the Korean Society for Technology of Plasticity Conference, pp. 24-25, 2018.
  3. Park, M. C., Ryu, H. Y., Ku, S. M., Lee, J. H., C. Lee, J. K., "Forging Process for Improving Tool Life in Hot Forging," Proc. of the Korean Society for Technology of Plasticity Conference, pp. 190-191, 2015.
  4. Gangopadhyay, T., Ohdar, R. K., Pratihar, D. K. and Basak, I., “Three-dimensional finite element analysis of multi-stage hot forming of railway wheels,” International Journal of Advanced Manufacturing Technology, Vol. 53, No. 1, pp. 301-312, 2010. https://doi.org/10.1007/s00170-010-2810-4
  5. Joun, M. S., Hwang, S. M., Moon, H. G., "Automatic Computer Simulation of Multi-Stage Hot Forging Processes - Flow, Temperature and Die Analyses," Proc. of the Korean Society of Mechanical Engineers Conference, pp. 337-340, 1995.
  6. Moon, H. G., Chung, J. H., Joun, M. S., "Rigid-Thermoviscoplastic Finite Element Analysis of Hot-Former Forging Processes," Proc. of the Korean Society of Mechanical Engineers Conference, pp. 749-753, 1998.
  7. Ahn, M., Cho, Y., Park, J., "A Study on the Influence of Friction Coefficient on Filling Ratio and Die Load in Heading Process Using FEM Analysis," Proc. of the Korean Society Of Tribologists And Lubrication Engineers, pp. 144-145, 2019.
  8. Choi, C. H., Jung, K. B., Kim, Y. J., “Finite Element Simulation on Prediction of an Asymmetric Hot Forging Die Life Based on Wear,” Journal of the Korean Society of Manufacturing Process Engineers, Vol. 12, No. 4, pp. 47-54, 2013.
  9. Kim, Y. J., “FE Analysis of Forging Process for Improving Tool Life in Hot Forging of CV Joint Outer Race,” Journal of the Korean Society of Manufacturing Process Engineers, Vol. 13, No. 3, pp. 56-62, 2014. https://doi.org/10.14775/ksmpe.2014.13.3.056
  10. Bang, W., Jung, J. Y., Chang, Y. W., “The Effect of Deformation Heat Compensation in the Hot Forging Analysis of SAF 2507 Stainless Steel,” Transactions of Materials Processing, Vol. 10, No. 3, pp. 206-213, 2001.
  11. Lee, S. C., Kong, J. H., Hur, K. D., “Hot Forging Analysis of Rotor Grip with Titanium Alloy for Unmanned Helicopter,” Journal of the Korean Society of Manufacturing Process Engineers, Vol. 10, No. 2, pp. 96-103, 2011.
  12. Song, H. N., Kim, G. M., Kim, T. S., M. S. Joun, "Estimation of temperature change of mold during forging by repeated analysis," Proc. of the Korean Society for Technology of Plasticity Conference, pp. 64-65, 2017.
  13. Kim, K. M., Yoo, J. D., Joun, M. S., "FE prediction of temperature variation of material and dies with number of strokes in aluminum yoke cold forging," Proc. of the Korean Society for Technology of Plasticity Conference, pp. 105-106, May 2019.
  14. Kwon, J. W., Lee, J. H., Lee, Y. S., Kwon, Y. N., Bae, W. B., “A Study on Interface Heat Transfer Coefficient Between Die and Workpiece for Hot Forging,” Transactions of Materials Processing, Vol. 14, No. 5, pp. 460-465, 2005. https://doi.org/10.5228/KSPP.2005.14.5.460
  15. Kang, J. H., Ko, B. H., Jae, J. S., Kang, S. S., "Heat transfer coefficients for F.E analysis in warm forging processes," Proc. of the Korean Society for Technology of Plasticity Conference, pp. 138-143, 2005.