Tools optimisation in cross wedge rolling

The present paper presents the possibilities of the application of optimisation methods for the designing of the tools to be used in cross wedge rolling (CWR) processes. A detailed description of the selection procedure for the forming angle α and the spreading angle β and the side wedge surface designing method has been presented. Powell’s non-gradient optimisation method and systematic searching approach have been used for the calculations. The rolling process was analysed using a unique method of deformation zone layer modelling. Optimal results have been found by means of wedges with convex side surfaces.