DEVELOPMENT OF A FEM-MODEL FOR THE SIMULATION OF THE TRANSFER OF SURFACE-STRUCTURE IN COLD-ROLLING PROCESSES

In the temper rolling process the effect of transferring the roll-surf ace structure to the steel sheet is purposively used to adjust a defin ed sheet-surface structure required for further processing. The object ive of the investigation presented in this paper is to analyze the tra nsfer behaviour specific to the electron-beam texturing technique (EBT ) and, in addition to that, to develop a model for the simulation of t hese transfer characteristics. For this purpose in the first part the results of a study on the basis of rolling tests on an industrial temp er mill are presented. These results do not only point out the basic t ransfer mechanisms - penetration processes and reverse extrusion pheno mena - but beyond that also lead to an explanation of the transfer beh aviour specific to the rolling conditions by the application of simila rity numbers (substitute profile model). On the basis of these results in the second part a model is developed to simulate the transfer char acteristics by the application of the finite element method (FEM).