Application of Tailor Rolled Blank in A-pillar stiffener of a certain automotive body

Abstract

Tailor Rolled Blank(TRB) can be used for manufacturing A-pillar stiffener in an automotive body in order to achieve the goal of automotive lightweight on the premise of meeting requirements of strength and rigidity. In this paper, forming and springback simulations of A-pillar stiffener made of TRB were carried out. Aiming at springback and thickness transition zone(TTZ) movement defects, annealing and rib were adopted in order to lower springback and TTZ movement. Research findings show that after annealing is adopted, TTZ movement increases slightly, and meanwhile rib can diminish TTZ movement. Rib and annealing can lower springback of TRB A-pillar stiffener, especially springback on the thinner side, and springback of the whole TRB part becomes uniform.