| 摘要 |
PROBLEM TO BE SOLVED: To provide a die device capable of easily forming holes with a high roundness even when forming the holes adjacent to and close to each other.SOLUTION: A punching member includes a first punching member 10A containing a first cutting edge 11A formed around a first central axis AX1, having a first joint surface 12A formed by cutting along a plane containing an axis parallel with the first central axis, and containing a first shank 13A larger than the first cutting edge in diameter; and a second punching member 10B containing a second cutting edge 11B formed around a second central axis AX2, having a second joint surface 12B formed with a width larger than the first joint surface by cutting along a plane containing an axis parallel with the second central axis, and containing a second shank 13B larger than the second cutting edge in diameter; the first and second punching members being joined by the first joint surface and second joint surface, exposing the second joint surface. A die plate has holes for holding an outer circumferential part of the first shank, an outer circumferential part of the second shank, and the exposed second joint surface. |
