| 摘要 |
PURPOSE:To control the draft of each strip by winding the composite material of the strips passing the gap between press contact rolls on one roll, winding the one strip on the other roll on the inlet side of the rolls and giving a difference to the peripheral speeds of the respective rolls. CONSTITUTION:Rolling rolls 5, 6 having the same diameter are driven in the directions opposite to each other. A strip 1 drawn from a reel 3 and a strip 2 drawn from a reel 4 and wound once on the roll 6 are fed into a roll gap (g) and a composite material 7 resulted from the press contact of both strips is wound on the roll 5 and is taken up by a reel 8. The tension that reduces the slip between the rolls 5 and 6 is applied on the material 7 and the strip 2 in this stage. The peripheral speeds V1, V2 of the rolls 5, 6 are set at the speed ratio V1/V2 suitable for the material, for example, at about 1.4-1.9 in the case of a cold rolled steel, at which the rolls are driven. The draft of each strip is thus adjusted freely and the need for laborious work such as roll exchanging is eliminated. |
