| 摘要 |
PURPOSE:To obtain a metal plate excellent in press formability by forming a recessed part to catch a lubricating oil on metal plate surface. CONSTITUTION:A temper rolling roll, which is provided with many projection parts regularly and microscopically distributed and a net like groove encircling the projection parts, in which a size of the upper face of each projecting part is in the range of inside the circle of max. diameter 500mumm and accommodating the circle of min. diameter 50mu, a ratio of the total surface area of the projecting part occupied in the roll surface area is 10-35%, is used for rolling. |
