Basic Studies of Roll Forging II

To obtain fundamental data on roll forging, the actual three-dimensional unsteady flow situation is converted to a two-dimensional steady flow model and experimental and theoretical analyses of material flow are carried out for the particular case of cross rolling. An experimental rolling mill is used for the experiments with plasticine as the test material. Two-dimensional steady pseudo-plastic flow is assumed for the theoretical analysis and a finite element method is used to provide numerical solutions for lateral flow under the forming roll. The theoretical solutions for velocity and shear strain-rate distributions over transverse sections are compared with experimental measurements taken from grid patterns on the test specimens. Good agreement is obtained.