An axisymmetric forging approach to preform design in ring rolling using a rigid-viscoplastic finite element method

摘要

In this paper, a new method for approximately predicting the deformation of material in ring rolling ispresented. The plastic flow of material in ring rolling is assumed to be axisymmetric and thus the ringrolling process is considered as a sequence of consecutive forging processes. The problem, havingtool velocity as well as material velocity field as unknown variables, is formulated by an axisymmetricrigidviscoplastic finite element method. The unknown tool velocity is determined by making thecircumferential stress on the ring cross-section exist in the range of user-specified values. Theapproach is applied to preform shape design in ring rolling of bearing races. The predicted results arecompared with the experimental ones. It has been shown that the approximate approach presented isuseful for engineering design of preform in ring rolling of bearing race-like rings.