Applications of advanced models to prediction of flatness defects in cold rolling of thin strips

摘要: Flatness defects in thin strip cold rolling are a consequence of roll thermo-elastic deformation, from which heterogeneous plastic deformation results. When flatness manifest on line, buckling reorganizes the stress field pre- and post-bite areas. This might impact strain fields bite, an effect had been neglected. Two coupled Finite Element Method (FEM) approaches presented here to examine what extent such potential in-bite / out-of-bite feedback determines strip. Using both methods comparing with standard case where is not accounted for, it has shown5 that (i) taking into account results completely different fits correctly measured on-line residual profile under tension (by "stress-meter rolls"); (ii) coupling area model, whatever technique, changes little fields. The models applied several questions, namely temperature thinner edges, friction optimal setting actuator, Work Roll Bending (WRB).