Journal
PRODUCTION ENGINEERING-RESEARCH AND DEVELOPMENT
Volume 2, Issue 3, Pages 269-276Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11740-008-0110-8
Keywords
Production process; Hot stamping; Friction coefficient
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Innovative hot sheet metal forming technologies are gaining an increasing significance in the scope of application of more and more innovative high and ultra high strength steels in the automotive industry. With respect to a numerical process design beside the mechanical and the thermal material characteristics the friction coefficient represents an important input parameter for finite element (FE) simulation. Within the scope of this paper an evaluation method for the determination of the friction coefficient mu for the direct hot stamping process of boron-manganese steels will be presented. Therefore cup deep drawing tests at elevated temperatures following the time-temperature-characteristic of the hot stamping process are carried out. For the calculation of the friction coefficient the approach according to Siebel for the modeling of the maximum drawing force is used.
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