Trends in the Development of Machinery and Associated Technology ” TMT 2014 , Budapest , Hungary , 10-12 September 2014 PUNCH DISPLACEMENT PREDICTION IN AIR BENDING PROCESS USING FINITE ELEMENT SIMULATION
The success of air bending process depends on ability to accurately determine the punch displacement for desired bend angle after unloading. Punch displacement in the air bending is a complex function of tool and part geometry, mechanical properties of sheet and their changes during bending. The aim of this research was to develop the FE models for punch displacement and springback prediction using LS-Dyna. In order to validate results of the FE simulation, five bending experimets for materials S355MC and DD13 were conducted. It was found that FE springback predictions for microalloyed S355 MC steel are significantly lower compared to experimental data, while predictions for mild DD13 steel can be reliably used.