| 摘要 |
PROBLEM TO BE SOLVED: To provide a bending device with which a predetermined shape can be readily obtained without the need of preforming.SOLUTION: A processing device includes a tip of a punch which has an inverted L-shape notch for pressing, after bending process, both a vertical surface and a horizontal surface located across a bending ridge line of a board material. In the processing device, an inside of the notch has a soft part by 10% or more along a direction of the bending ridge line of the board material. |
