| 摘要 |
PROBLEM TO BE SOLVED: To provide a passing machining die capable of efficiently carrying out passing machining while finishing an overlapping part of punch holes to be smooth, and easily grinding a worn punching edge again, by being used in combination with a passing machining punch.SOLUTION: A passing machining die 11 is composed of a die body 12 and a blade member 13. The die body 12 has a through-hole 14 vertically penetrating the body. An upper end edge on a downstream side in a plate material feeding direction A at an upper surface opening peripheral edge of the through-hole 14, and upper end edges on both sides in the plate material feeding direction A are made to be punching edges 12b, 12c, and 12d. A blade member seat surface 17 is formed adjacent to an upstream side in the plate material feeding direction A of the through-hole 14. The blade member 13 can be installed to the blade member seat surface 17 and has height dimensions lower than the punching edges 12b, 12c, and 12d on an upper surface in the installed state. The upper end edge on the downstream side in the plate material feeding direction A is made to be a punching edge 13a. |
