| 摘要 |
PURPOSE:To surely keep flatness by an inexpensive device by straightening three dimensional shape defects by bending under a tension and reducing cambers and residual stresses by strong leveling with a high rigid leveler. CONSTITUTION:A steel strip coil 2 from a payoff reel 1 is straightened its winding wrinkles and is unwound by a feed leveler 7; the width of a steel strip S is adjusted by a side trimmer 8 and is passed through a small dia. non-driven elongating leveler 9. At that time, a payoff reel tension and a leveler pulling force join in bending as a tension. The straightened steel strip is subjected to strong repeted bendings with gradually decreasing curvatures to straighten cambers and to reduce residual stresses by a large dia. driven leveler 10. The strip is pulled out by a pinching force of double pinch rolls 11 because only a friction force of the main leveler 10 is not sufficient to pull the strip. Then, the strip length is measured by measuring rolls 12, is cut by a prescribed length each by a 2nd flying shear 5b, and is piled in a piler 13 as cut sheets.
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