TY - GEN
T1 - Design of hot stamping tools and blanking strategies of ultra high strength steels
AU - So, Hyunwoo
AU - Hoffmann, Hartmut
N1 - Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 2008.
PY - 2008
Y1 - 2008
N2 - In recent years, the automotive industry is making an effort to reduce the vehicle weight in order to reduce the CO2 emission while maintaining high strength properties of vehicle components. For lightweight construction, the demand of ultra high strength steels is drastically increased. To increase the formability and reduce the high spring back, hot stamping with ultra high strength steel is becoming more popular in automotive industry. In hot stamping, blanks are hot formed and press hardened in a water-cooled tool to achieve high strength. Hence, design of the tool with active cooling system significantly influences the final properties of the blank and the process time. However, the achieved high strength causes severe tool wear at the blanking of the hardened parts in a serial production with conventional mechanical cutting methods. Because of high costs for repairing of the blanking tools, laser cutting has been necessarily used in almost all automotive industries as alternatives in spite of the high costs and long process time. In this paper, the systematic design method of the hot stamping tool is introduced. Subsequently, some latest results on the blanking of the hardened steels after hot stamping are presented.
AB - In recent years, the automotive industry is making an effort to reduce the vehicle weight in order to reduce the CO2 emission while maintaining high strength properties of vehicle components. For lightweight construction, the demand of ultra high strength steels is drastically increased. To increase the formability and reduce the high spring back, hot stamping with ultra high strength steel is becoming more popular in automotive industry. In hot stamping, blanks are hot formed and press hardened in a water-cooled tool to achieve high strength. Hence, design of the tool with active cooling system significantly influences the final properties of the blank and the process time. However, the achieved high strength causes severe tool wear at the blanking of the hardened parts in a serial production with conventional mechanical cutting methods. Because of high costs for repairing of the blanking tools, laser cutting has been necessarily used in almost all automotive industries as alternatives in spite of the high costs and long process time. In this paper, the systematic design method of the hot stamping tool is introduced. Subsequently, some latest results on the blanking of the hardened steels after hot stamping are presented.
UR - http://www.scopus.com/inward/record.url?scp=84903507430&partnerID=8YFLogxK
U2 - 10.1007/978-3-540-85190-5_33
DO - 10.1007/978-3-540-85190-5_33
M3 - Conference contribution
AN - SCOPUS:84903507430
SN - 9783540851899
T3 - Springer Proceedings in Physics
SP - 316
EP - 325
BT - EKC 2008 - Proceedings of the EU-Korea Conference on Science and Technology
A2 - Yoo, Seung-Deog
PB - Springer Science and Business Media, LLC
T2 - 1st EU-Korea Conference on Science and Technology, EKC 2008
Y2 - 28 August 2008 through 31 August 2008
ER -