| 摘要 |
<p>PURPOSE: To attain rolling mill and rolling method with the shape of the crown of a work roll so that preferable crown and shape of a rolling stock to be rolled can be attained in a multiple rolling mill with four stages or over, shifting upper and lower work rolls. CONSTITUTION: This must be a rolling mill equipped with at least backup rolls 4 and 5 and work rolls 2 and 3, whose backup rolls 4 and 5 are equipped with crowns symmetrical to the left and the right, having maximum diameters in the centers of roll barrel lengths, and whose work rolls 2 and 3 are equipped with the following crowns. (a) A maximum roll diameter is positioned in a position deviated from the center of a roll barrel length so that the crowns of upper and lower rolls are in the same shape and become in point symmetry each other to the center of the rolling mill. (b) A smoothly continuous curve is composed by the crown of the roll, and a roll diameter is monotonously decreased toward the left and the right ends of the roll from the position of the maximum roll diameter. (c) And, the curve is equipped with at least one inflection point or over on either one side of the left or the right or on both sides of them in distances from the position of the maximum roll diameter to the ends of the left and the right of the roll.</p> |
