The application of the inverse method for determination of slitting criterion parameter during the multi slit rolling (MSR) process

The rolling of rods with slitting of the strip calls for the use of special mathematical models that would allow for the separating of metal. For the numerical modelling of strip slitting the Forge3® computer program was applied. The strip slitting in the simulation is implemented by the algorithm of removing elements in which the critical value of the normalized Cockroft–Latham criterion has been exceeded. The numerical analysis of the effect of the criterion on a distance between a point, where a crack begins, and point of contact metal with the slitting rollers was made. To determine the value of the criterion the inverse method was applied. The measured distance is used for the criterion determination. A theoretical analysis of the effect of the gap of slitting rollers on the process of band slitting during the rolling of 20 mm-diameter ribbed rods rolled according to the two-strand technology was carried out within this study.