FEM analysis of springback control with lump-punch penetration after V-bending

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Aso, Takayuki^1 ; Iizuka, Takashi^1

Department of Mechanical and System Engineering, Kyoto Institute of Technology, Matsugasaki Goshokaido-cho, Sakyo-ku, Japan^1

关键词: Bend angle;    Deformation state;    Empirical method;    FEM analysis;    Punch penetration;    Spring-back;    V-bending;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032068/pdf
DOI  :  10.1088/1742-6596/734/3/032068

来源: IOP

【 摘 要 】

In actual manufacturing, some empirical methods such as the bottoming technique are generally used in order to adjust the bend angles of products. However, the problem with this is that it relies on the technique of the engineer. In this study, quantitative springback control by lump-punch penetration after V-bending is investigated with FEM analysis and experimentation. The lump at the punch tip is pushed into a bent section at the final stage of V-bending and stretches the inside surface at the bent section. The method of springback control is suggested based on the deformation state. Then, the suitability of springback control using this mechanism is investigated. It is confirmed that the springback amount is reduced by lump-punch penetration. Accordingly, it is recommended to control springback by sheet forging with a lump punch.