The study is concerned with a slip line process of the plane strain ring roll process by using a matrix method. The roll separating force and the roll torque are computed from the slip line analysis for comparison with the experimental results.
The previous slip line solutions did not incorporate the effect of roll size difference, roll shapes and idle rotation of the pressure roll. These effects were taken into account in the present analysis under the assumptions of plane strain condition and rigid-perfectly plastic material behavior at the given pass.
Experiments were carried out with AISI 1045 steel ring blanks in the developed CNC ring rolling machine. The computed values for the roll separating force are in excellent agreement with the experimental results. Since the frictional condition at the roll-workpiece interface could not be considered properly, there is a considerable difference between theory and experiments. Computations were also carried out for the case of large reductions and the comparison with the FEM solutions showed that there is a good agreement between two solutions.
