Study on springback of high tension steel following various temperature and local pre-heating in the roll forming process

In this study, we studied spring-back phenomenon following pre-heating and various temperatures on forming sheet in roll forming process using finite element method (FEM) simulations. Material of forming sheet was high tension steel (POSTEN 60), and we analyzed spring-back phenomenon using material properties from room temperature to 500°C. For spring-back phenomenon analysis, FEM simulation results were thermal stress and strain according to temperature distribution on forming sheet. Assumed pre-heating methods were induction heating and laser heating, also this study assumed that pre-heating is same temperature conditions. Finally, the spring-back phenomenon was analyzed by induction preheating and laser pre-heating method.