Papers by Author: Bao Yu Wang

Abstract: The aim of this paper is to determine whether the train axle cross wedge rolling(CWR) using square billet as blank is available or not. Based on numerical simulation software DEFORM-3D, we built the finite element model. And the whole forming process was simulated successfully. The stress and strain distributions of workpiece in the process were analyzed. The effect of forming angle, stretching angle and billet size on rolling force was investigated, then determined the proper process parameters. The differences between the round billet rolling and the square billet rolling were obtained by comparing the tangential, axial and radial forces during the rolling process. The studied results show the availability of using square billet as blank in train axle CWR and provide important realistic meaning and application value.

Abstract: The instantaneous speed ratio between roller and workpiece is not only the basis of the relative movement relationship but also the key to deriving the curve of non-rotating shafts with cross wedge rolling. In the paper, the instantaneous speed ratio was analyzed by using FEM. Then, the equation of instantaneous speed ratio equation was regressed by using the statistical analysis software. In the meantime, the experimental rolling equipment was designed to verify the accuracy of the regression equation. Satisfactory consistency was demonstrated by comparison of the theoretical values and results obtained from experiments.