FEM study of metal rolling in grooved rolls

LS-DYNA was used to model the rolling process in grooved rolls. One-pass and two-pass (with rotation of the metal sheet at 90° a fter first pass) rolling in grooved rolls, as well as four-pass rolling in plain rolls and various combinations of these two types of rolling were simulated. With the help of finite-element analysis we estimated the influence of the areas of deformation hardening on the stress-strain state of metal sheet. The developed finite-element model allows analyzing stress-strain state of the system caused by variation of parameters, such as: geometry (design), rolling speed, physical- mechanical properties of materials, temperature and friction coefficient. Process parameters can be fine-tuned to achive the desired improvement of physical-mechanical properties of the rolled metal .