Experimental study on springback of high strength sheet metals

摘要

High strength sheet metals have been widely applied in automobile and aerospace industries forntheir light weight. However, the formability and forming behaviour of high strength sheet metalsnremain still unclear. In this paper, we mainly focus the research on the springback of high strengthnsheet metals via a servo press which can precisely control the speeds, loads and displacements.nThe research shows that the load, displacement and multiple hit bending can control thenspringback effectively, the extension of holding time cannot reduce the amount of the springbackndramatically and the forming speed almost does not affect the springback.