上昇せん孔加工法における塑性変形について

概要

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Plastic flow of metals was measured from the beginning to the end of piercing process. On the steady of plastic flow, the material, located farther than a distance equal to half the diameter of the die from the punch, was not in the state of plastic deformation, and the dead metal under the punch was not found when the area reduction was more than 50%. At the beginning and the end of piercing process, plastic flow directions and strains were determined during small stepwise deformation process from distorted grid lines on the cross section, and especially the forming process of the dead metal was studied.
社団法人日本機械学会の論文
1956-06-25