| 摘要 |
According to the present invention, a punching method for a soft metal plate to make holes on a soft metal plate using a punch wherein an uneven groove is formed on a lower bottom, and a ring-shaped blade protrudes downwards from the lower edge. As such, the punching method for soft metal plate prevents a periphery of the holes from being dented to eliminate a post process to prevent and remove the dents; thus reducing the number of processes, and reducing a processing time and costs. |
