Analysis of Deformation Behavior in Backward–Radial–Forward Extrusion Process

Abstract

The forming characteristics of backward–radial–forward extrusion process were investigated by the effect of some important die design geometry parameters. Some major flow faults such as separation height and length, asymmetric ratios of height and angle are introduced and the effects of process parameters are studied on them. The workpiece material was AL1050 and the simulation work was performed by the rigid-plastic finite element method. The validity of the simulation results obtained in this study was verified by using the experimental test data in terms of forming load and material flow. There is reasonably good agreement between the simulation and the experiment. The die geometry and frictional condition have a significant influence on the material flow into the die cavities. The work presented in this paper might be used for basic data in the design of the backward–radial–forward extrusion process.