Understanding temperature and contact pressure in hot stamped channels

Rolfe, Bernard, Zhang, Peng, Abdollahpoor, Amir, Wang, Chengyong and Pereira, Michael 2015, Understanding temperature and contact pressure in hot stamped channels, in CHS2 2015 : 5th International Conference on Hot Sheet Metal Forming of High-Performance Steel, Verlag Wissenschaftliche Scripten, Auerbach, Germany, pp. 793-800.

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Title Understanding temperature and contact pressure in hot stamped channels
Author(s) Rolfe, BernardORCID iD for Rolfe, Bernard orcid.org/0000-0001-8516-6170
Zhang, Peng
Abdollahpoor, Amir
Wang, Chengyong
Pereira, MichaelORCID iD for Pereira, Michael orcid.org/0000-0002-7885-5901
Conference name Hot Sheet CHS2 Metal Forming of High Performance Steel. Conference (5th : 2015 : Toronto, Canada)
Conference location Toronto, Canada
Conference dates 31 May- 3 Jun. 2015
Title of proceedings CHS2 2015 : 5th International Conference on Hot Sheet Metal Forming of High-Performance Steel
Publication date 2015
Start page 793
End page 800
Total pages 8
Publisher Verlag Wissenschaftliche Scripten
Place of publication Auerbach, Germany
Summary This paper investigates the temperature and contact pressure conditions in hot stamped channels of boron steel. Hot stamping has been used for many years to produce high strength structural auto-motive components. The high tensile strengths achievable by hot stamping is beneficial where the intrusion during a vehicle crash is not desirable – e.g. for the vehicle occupant compartment. How-ever, the high blank temperatures and high temperature cycling causes a large amount of wear in the tooling. These conditions have led to high tool failures and die maintenance costs. Thus, un-derstanding the main causes of wear behaviour in the hot stamping process is of high interest to hot stampers.
To this aim, a generic 2D thermo-mechanical finite element model of a hat-shaped crash formed hot stamped component was developed (based on the authors previous hot stamp model), and a modified phase transformation model based on Scheil’s additive principle has been applied. The model was created in the finite element software ABAQUS Standard V6.13, including convection and radiation when the component was transferred from furnace to the tool as well as the air-cooling process. A USDFLD subroutine was used to model the phase transformation and a HET-VAL subroutine was used to model the latent heat. Contact heat conductance was a function of the pressure.
The authors have used techniques from their previous work on tool wear estimation for cold stamping to estimate the contact pressure on the tooling, and the amount of sliding that occurs over the tooling, and the corresponding tooling temperature. This data provides a unique data set to understand the wear on the tooling, and will eventually lead to a model for estimating tooling life.
Language eng
Field of Research 091006 Manufacturing Processes and Technologies (excl Textiles)
091309 Tribology
Socio Economic Objective 861205 Sheet Metal Products
HERDC Research category E1 Full written paper - refereed
ERA Research output type E Conference publication
Copyright notice ©2015, Verlag Wissenschaftliche Scripten
Persistent URL http://hdl.handle.net/10536/DRO/DU:30074690

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