Rev. Met. Paris
Volume 101, Number 7-8, July-August 2004Surfaces et revêtements
|Page(s)||607 - 613|
|Published online||27 September 2004|
New approach for spring-back compensation in die design application for high strength steel
Carmakers face ever more frequently the phenomenon of spring-back after stamping, especially with new high strength steels (HSS and VHSS). Renault and Arcelor have been working together for many years on the formability and spring-back of VHSS. Recently, they aimed at establishing a method to optimize die shape in order to compensate for the spring-back after stamping. A method, named “Outifo” has been developed in order to obtain by simulation, from the initial CADs of the part and its referential stamped die, a CAD of a die with a modified shape. This allows the real stamping part, after forming and spring-back, to recover as closely as possible the geometry of the theoretical part defined by the designer.
© La Revue de Métallurgie, 2004
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