Punching processing method and roll forming die used in this processing method

摘要

In a punching processing method, a punch chip (29) having a roller shape is arranged in a punch chip holder (27) rotatable around the vertical axis and can be rotated around the horizontal axis. A die chip (47) having a roller shape is arranged in a die chip holder (65) rotatable around the vertical axis and can be rotated around the horizontal axis. Punching processing of a work is performed, in cooperation with the punch chip and the die chip, by moving the work (w) in the horizontal direction in a state in which the work is held between the punch chip and the die chip. Further, a roll forming die used in this punching processing method is also proposed. Accordingly, it is possible to perform various kinds of punching processings for a short time without causing any seam and easily perform processings of a circle and a curve in addition to processing of only a straight line.