About using unsymmetric rolling for the production of strips and bars

Unsymmetric rolling processes occurring at various geometric and kinematic parameters of the work rolls have received much attention in the last decades of the theory and practice of sheet rolling. The rolling-drawing process (RD), which allows expanding the technological capabilities of mills, was developed at SUSU under the guidance of Honored Worker of Science and Technology, Doctor of Technical Sciences V.N. Vydrin. The practice of using the RD process has shown in some cases its non-competitiveness with a symmetrical (usual) rolling process due to the process (increased torque on the rolls and increased specific tension of the ends of the strip). An analysis of the advantages and disadvantages of the RD process allowed us to formulate a new approach to the use of asymmetric rolling processes, which consists in the fact that special kinematic variants cannot solve all technological problems. A general rolling process (GRP) is proposed, consisting in the multivariance of the kinematics of the rolling process. The implementation of an acceptable kinematic option is determined by the conditions of the rolling process and the requirements for product quality.