In this paper, we developed high-precise V-bending technology in consideration of further high-tensile steel plate. Bottoming is the useful technique which improves shape freezing property in the bending. However, with further strengthening of material, there seems to be a limit of the working capability in present press machine. Therefore, new V-bending method is required. We had much attention to the conventional V-bending process and measured an amount of springback at some values of punch indentation. The result showed that the accuracy of formed shape could keep without bottoming by changing an amount of punch indentation corresponding to each material's strength. V-bending method proposed in this study is possible to keep the accuracy of formed shape by low capacity and control the shape freezing property in existing manufacturing facility.
