AIM OF THE WORK

To find a correlation between
the rolls roughness and the friction coefficient 

In order to obtain this correlation, some experimental tests have been carried out to measure the spread of the workpiece as a function of roll roughness; then, the spread has been evaluated by FEM simulation as a function of the friction coefficient.

R_a ------> experimetal tests -----> workpiece spread                

                                                                                            ]---->   μ = f (R_a)

 μ ------> FEM          ----->       workpiece spread                       

In order to verify the FEM simulation accuracy, experimental test and simulation results have been compared in terms of maximum height reduction obtainable.