Thermo-Mechanical Analysis of a Cooling System for Hot Stamping Tools

Abstract:

Several studies and design of cooling systems for hot stamping tools have already been made. The phase transformations which occur during the process are known, and numerical simulations are now very close to the reality [1]. However these studies are often related to a specific part and can hardly be extrapolated to other parts. This paper presents several results based on a thermo-mechanical analysis which can be used to make a first design of a cooling system for hot stamping tool. A theoretical study describes the heat transfer from the tools to the cooling pipes related to different flow parameters. Numerical simulation with the software COMSOL Multiphysics has been carried out to obtain results about cooling rate and maximum stress into the tool against geometry parameters. The heat transfer model used for simulation has been validated through experiment. To finish a data analysis describes the relationship between the different parameters, more specifically their impact on the cooling. With this study we can now determine which pipes’ location and size and flow properties are likely to provide the most efficient cooling system, and which parameter we must modify to optimize it.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 2053-2060
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.2053
• Online since: June 2012
• Authors: Fabien Mace, Jian Ping Lin, Jun Ying Min
• Keywords: 22MnB5 Boron Alloy Steel, Cooling Rate, Cooling System, Hot Stamping, Principal Component Analysis (PCA), Stress Intensity Factor (SIF)

References

[1] H. Karbasian, A.E. Tekkaya,A review on hot stamping, Journal of Materials Processing Technology ,Institute of Forming Technology and Lightweight Construction, Dortmund University of Technology, Baroper Str. 301, D-44227 Dortmund, Germany (2010)

DOI: 10.1016/j.jmatprotec.2010.07.019

[2] M. Merklein, J.Lechler, Investigation of the thermo-mechanical properties ofhot stamping steels. Journal of Materials Processing Technology 177, 452–455. (2006)

DOI: 10.1016/j.jmatprotec.2006.03.233

[3] M.C. Somani L.P. Karjalainen M., Eriksson, M. Oldenburg,Dimensionalchanges and microstructural evolution in a B-bearing steel in the simulatedforming and quenching process, ISIJ International 4, 361–367 (2001)

DOI: 10.2355/isijinternational.41.361

[4] Zhu Qiaohong,Heat Balance Analysis of Hot Stamping and Optimizing Design of Cooling System, master thesis,Tongji University (2007)

[5] Lucia Garcia-Aranda, Thermo-mechanical study and numerical modeling of hot stamping of Usibor 1500, PhD thesis, Mines ParisTech (2007)

[6] P. Bosetti1, S. Bruschi2, T. Stoehr2, J. Lechler2, M. Merklein2, Interlaboratory comparison for heat transfer coefficient identification in hot tamping of high strength steels, 1University of Trento, Italy, 2University of Erlangen-Nuremberg, Germany(2010)