Springback Elimination in Structural Components by Means of Electromagnetic Forming

Looking for car weight reduction related to the use of High Strength Steels (HSS) for manufacturing body-in-White components, an innovative application of the high velocity forming techniques has been developed: the Electro Magnetic (EM) calibration and elimination of the spring-back effect (sidewall curl) of High Strength Steel U-channels. Within this paper the initial tests on L and U-shaped parts will be presented. Being the mechanical stiffness the main paramerter for improving the coil ebdurance, the prediction of the coil strains under EM forces is a basic issue, which has been addressed within this study.