Preprocessing to weld line based on roller forming for tailored blank laser welding system

To reduce the width of the gap between the steel sheets will be welded by laser to form tailored blank, roller forming process by plastically deforming the thicker sheet is presented. Mechanism scheme and working principle of the roller forming device are introduced. Mathematical model of roller forming is founded by experiment and function fitting. Rolling and welding experiment results show that the roller forming process can effectively reduce the width of the gap between the sheets and weld the sheets with high speed and good quality.