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欲消除板带纵向弯曲、镰弯和屈曲(浪形和瓢曲)等缺陷,关键在于使带材产生塑性廷仲,使纵向纤维长度相等或接近。拉伸弯曲矫直是目前带材连续生产中新的高效能的矫直方法。带材中性层总相对残余延伸量Δε<0.5%时,板形不好;Δε=0.5～2.5%时,板形很好,Δε>2.5%时,板形难以控制。后张力大于前张力能得到更大的残余延伸量。为消除或减小槽形,应形成反弯力矩而限制槽形的弹复。后张力大于前张力的恒张力控制,能使带材平直度由2%减小到0.2～0.1%。
In order to eliminate the longitudinal bending of the strip, sickle bending and buckling (waves and buckles) and other defects, the key is to make the tape plastic Ting Zhong, so that longitudinal fiber length equal or close. Tensile bending straightening is the continuous production of new high-performance strip straightening method. When the total relative residual elongation of the tape neutral is less than 0.5%, the shape of the strip is not good. When Δε = 0.5-2.5%, the shape of the strip is very good, and when Δε> 2.5%, the shape of the strip is difficult to control. After the tension is greater than the pre-tension can get a larger residual extension. In order to eliminate or reduce the groove shape, should be formed to reverse bending moment and limit the slot-shaped rebound. After the tension is greater than the tension before the tension control, can strip straightness reduced from 2% to 0.2 ~ 0.1%.