自由せん孔および側方排除せん孔加工法における塑性変形について

抄録

Plastic deformation of materials was measured in the process of piercing free of the die, and Erhart's method. It was considered that Erhart's process consisted of two processes. The first forming process was analogous to the process of piercing free of the die. In this process, the material is pierced and compressed to fill up the clearance between the material and the die. Then forming process changed to the inverse extrusion process. Considering this result, Erhart's method was not always expected better process than the in verse extrusion, on the magnitude of the load.