406 中実丸棒へのカラー成形加工に関するFEMによるモデル解析(OS3-1 変形解析)(OS3 機械材料の変形とそのモデリング)  [in Japanese] 406 Modeling Analysis for Collar Cold Forming on a Rod by using FEM  [in Japanese]

It was found out that a local collar could be formed on a rod by a combination of compression, bending and axial-rotation temperature rise in collar forming process was below 15℃ in spite of super plastic deformation. This collar forming method is a technology that Baushinger effect can be applied to form collars by giving altemate bending stress of tension and compression to a rod subjected to axial stress slightly below yield strength.