Numerical modelling of the metal flow and stock bending during the rolling of unequal angle bar

The rolling of angle bars in closed passes is essentially an asymmetrical process. Therefore, it is advisable to carry out computer simulations of this process in the aspect of stock bending after exit from the roll gap, which depend on the diameters of both rolls. This paper presents the possibility of using numerical modelling for aiding the design of the technology of rolling 150 mm × 100 mm × 10 mm unequal angle bar. For carrying out the simulation the computer programs FEM Forge3® and the authors program SortRoll were used to investigate the thermo-mechanical simulation of this rolling process. The correctness of prediction of stock delivery after particular passes was verified in the study by comparing simulation results to templates obtained in industrial tests. Then, the effect of roll diameter on the stock bending (turn-up/down) after the exit of the roll, was examined. The examination involves the analysis of how the stock exits the rolls with equal and unequal diameters of rolls, respectively.