Rectangular Improvement Method for Plan View Pattern of Plate During Angular Rolling Process

The effect of the angular rolling process on the plan view pattern of the plate is studied, the rectangular influence factor and improvement method for plate angular rolling process are proposed in this paper. Finite element models are established for the conventional rolling and angular rolling processes respectively, and with DEFORM software, the numerical simulation is carried out. A characterization formula reflecting the rectangular degree of the rolled piece is constructed and the rectangular degree of the plates under different rolling process conditions are compared. Considering the actual rolling process conditions, the range of theoretically calculated rectangular rotation angles is extended to obtain the optimum rectangular rotation angle with finite element simulation method. The one-group two-pass angular rolling is separated to one-group four-pass rolling and the simulation results show that the rectangular degree of the four-pass process is better than the two-pass process. Angular rolling experiments are carried out, the actual data shows that the rectangular characteristic value of the rolled piece is 1.003 with the four-pass process, and 1.014 with the two-pass process. It verifies that with separating one-group two-pass angular rolling process to one-group four-pass angular rolling process can improve the rectangular degree of the rolled plate.