| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bend processing method capable of bending a steel plate in high precision, providing no defect on the surface of the plate, and forming even a steel plate having inferior shape into a predetermined shape.SOLUTION: A plate protruding from a die part is preliminarily processed for providing a nail hook part parallel to a bend contour line of the plate and facing in an opposite direction to a bend direction. When the plate is bent along the bend contour line, a plate pressing punch is hooked on the nail hook part and then the plate is bent.</p> |
