Investigation Mechanism of V-Ring Indenter Geometry in Fine-Blanking Process
The V-ring indenter geometry (angle, height and position) was investigated by using the finite element method (FEM) to theoretically clarify the mechanism and its action in the fine-blanking process. The FEM simulation results indicate that very small or very large V-ring indenter angles, heights, and positions cause difficulty in the rotation of the material-flow and that the hydrostatic pressure is generated with great difficulty in the blanked material; therefore, crack formation occurs easily. The application of a suitable V-ring indenter angle, height, and position significantly suppresses the formation of rotating flow, which results in increased hydrostatic pressure, and crack formation is consequently prevented.
B. Shirvani, R. Clarke, J. Duflou, M. Merklein, F. Micari and J. Griffiths
S. Thipprakmas and M. Jin, "Investigation Mechanism of V-Ring Indenter Geometry in Fine-Blanking Process", Key Engineering Materials, Vols. 410-411, pp. 305-312, 2009