Position/force control method for profiled ring rolling process of large aluminum alloy ring

Abstract

For the problems of instability and low forming quality in the profiled ring rolling process of large aluminum alloy ring, a method for profiled ring rolling based on position/force feedback was proposed. Based on the data of position and pressure sensor, the control strategy of guide roll and axial roll was developed. On the other hand, a mixed feeding strategy about "constant feed speed of mandrel"(CFSM) to "constant growth of ring radius"(CGRR) is provided. By using ABAQUS/CAE analysis software and Fortran language, a finite element model (FEM) for simulation profiled ring rolling process of large aluminum alloy considering position/force feedback control was established, and the rolling stability and forming quality in profiled rolling process were analyzed. The results of simulation and experiment show that under the condition of rolling stability, the cross section and outer radius of ring meet the design requirements, and the center displacement and roundness errors of ring are reduced by 75%.