Positional deviation of bending point in asymmetric V-die bending process of HSS sheet: an experimental study

In this study, a series of experiments are performed to characterize the asymmetric V-die bending process for a High-strength steel (HSS) sheet. The main challenge in asymmetric V-die bending is positional deviation of the bending point during bending, given by a magnitude and a direction of deviation of the bending point. The effects of process parameters, such as radii of the punch head and the die shoulder, on the positional deviation of the bending point were experimentally examined to identify those that govern the deviation of the bending point in an asymmetric bending process. This work improves our understanding of deviations of the bending point, and can be used for developing process design guidelines for asymmetric bending of high-strength steel sheets to produce precise, asymmetrically bent parts.