TY - GEN

T1 - Coupled thermomechanical numerical investigations of a hot forging die with an integrated cooling system

AU - Behrens, Bernd Arno

AU - Chugreev, Alexander

AU - Bonhage, Martin

AU - Büdenbender, Christoph

AU - Zaitsev, Aleksandr

AU - Malik, Irfan Yousaf

N1 - Funding information: The presented results are based on the framework of the research projects Collaborative Research Center 653 “Gentelligent Components in their Lifecycle” in the subproject E3 “Sintering gentelligent parts from metal powder” (grant number 5486368) and “Development of a geometry based method for the compensation of process-related dimensional deviations of solid formed parts” under the (grant number 334525444). The authors would like to thank the German Research Foundation (DFG) for the financial support.

PY - 2019

Y1 - 2019

N2 - Tools in hot forging processes undergo high thermal and mechanical loads and thus experience corresponding fatigues. Mechanical fatigue can be reduced by design optimization, but process related changes are needed in order to minimize the thermal fatigue. Especially the control of the ground temperature is important since it influences a large number of tool attributes e.g. strength and ductility, peak temperature and temperature difference. The use of an active cooling system allows a targeted control of the tool ground temperature thus leading to a reduction in process interruptions as well as maintenance time. In comparison to common straight drilled cooling channels, tool-specific cooling systems are known to remarkably take influence on an individual tool design, thus improving tool durability. The current study deals with the numerical investigation of a forging die with an oil based integrated cooling system. Different parameters like the coolant temperature and the mass flow rate were considered in order to evaluate the behaviour of the system during application. The results were compared with the temperature distribution in the forging die without integrated cooling. The findings of this work will help to further optimize the hot forging die and in return lead to more efficient forging processes.

AB - Tools in hot forging processes undergo high thermal and mechanical loads and thus experience corresponding fatigues. Mechanical fatigue can be reduced by design optimization, but process related changes are needed in order to minimize the thermal fatigue. Especially the control of the ground temperature is important since it influences a large number of tool attributes e.g. strength and ductility, peak temperature and temperature difference. The use of an active cooling system allows a targeted control of the tool ground temperature thus leading to a reduction in process interruptions as well as maintenance time. In comparison to common straight drilled cooling channels, tool-specific cooling systems are known to remarkably take influence on an individual tool design, thus improving tool durability. The current study deals with the numerical investigation of a forging die with an oil based integrated cooling system. Different parameters like the coolant temperature and the mass flow rate were considered in order to evaluate the behaviour of the system during application. The results were compared with the temperature distribution in the forging die without integrated cooling. The findings of this work will help to further optimize the hot forging die and in return lead to more efficient forging processes.

KW - Cooling system

KW - Design optimization

KW - FEM

KW - Forging

KW - Numerical study

KW - Thermal effects

UR - http://www.scopus.com/inward/record.url?scp=85079369741&partnerID=8YFLogxK

U2 - 10.37904/metal.2019.698

DO - 10.37904/metal.2019.698

M3 - Conference contribution

AN - SCOPUS:85079369741

SP - 326

EP - 331

BT - METAL 2019

T2 - 28th International Conference on Metallurgy and Materials, METAL 2019

Y2 - 22 May 2019 through 24 May 2019

ER -