| 摘要 |
PURPOSE:To improve considerably the capacity for leveling a sheet material with simple modification of the conventional roller leveler in a roller leveler which passes the sheet material between upper and lower leveling roll groups by providing a pinch roll group before said roll groups on the sheet feed side. CONSTITUTION:The sheet material 3 having a defective shape is fed between the upper and lower rolls of the leveling roller group A constituted of the upper and lower leveling rolls 1, 1..., 2, 2..., by which the shape is corrected. The pinch roll group B consisting of the roll pairs of upper and lower pinch rolls 4, 5 is provided before the roll group A on the material 3 feed side. The group B grasps under the pressure the material 3 between the rolls 4 and 5 and transfers the material into a direction X so as to feed the material into the group A. The internal stress distribution of the defective shape material having edge waves is thus increased and the stress distribution is created particularly in the top end of the sheet as well. The satisfactory leveling effect is thus obtd. |
