1157 異種鋼材の軸肥大加工と塑性変形挙動

概要

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We have found a new plastic working method by which an arbitrary size collar can be formed in the middle of a round mild steel bar of φ10 in diameter at room temperature only with rising in temperature below 10℃. This unique plastic working method is carried out by giving the round bar repeatedly an alternate stress of tension and compression by a rotational bending moment under a constant axial-compressive stress below the yield strength. The plastic deforming behavior in the working process are possible to be predicted by the model formula with only a parameter which we have considered in original idea. In the purpose of developing this working method into a various steel bar with various yield strength, 6 kinds of structural steel with φ10 in diameter were collar-formed to clarified the effect of yield strength on the working conditions. The model formula to estimate the deforming behaviors was revised so that the effects of yield strength on diameter enlarging deformation behaviors could be considered into the condition of compressive stress.
一般社団法人日本機械学会の論文
2003-08-05