The Influence of Geometrical Angles of Horizontal V-Shaped Anvils on the Field Stress of Heavy Axial Forgings

摘要

The forging method with horizontal V-shaped anvils (HVA) is effective in the control of inner stress states,metal tissue,overall properties and geometrical shapes of forgings. FEM numerical simulation is conducted for the HVA forging method to investigate the influence of horizontal angle of HVAs on the stress field in the stretched forging. The simulation results show that during HVA forging,the match of horizontal angle and reduction ratio influences much upon the transversal and axial stress state in the forgings. In order to control the two-way tensile stress,small horizontal angle must be adopted when the reduction ratio is small,while bigger horizontal angle when the reduction ratio is bigger. When the reduction ratio is larger than 15%,it is easy to obtain two-way compressive stress.