Springback calibration using pulsed electromagnetic field

In stamping practice, springback of the blank is often compensated by developing the shape of the blank, which provides the targeted shape after its springback. In this paper we attempt to address the root cause of springback phenomenon dictated by residual stresses in the blank after completion of the stamping process. New process of springback calibration has been developed based upon the idea of elimination of elastic residual stresses in stamped blank. This technology attempts to address the issues of sheet material variability and stamping process variations, which make geometrical compensation more difficult. Simple set of experiments demonstrated that formed blank can be clamped to the targeted shape and then subjected to pulsed electromagnetic field.