【摘要】 大张力卷取的冷轧板卷在卷取机上卸下时常常会塌卷。本文介绍了对此问题的理论研究和试验结果。认为,由于在卷取时,在钳口处的钢卷最内层平面部分形成很高的环向压力,以致板卷稳定性下降。所得塌卷临界环向压力与实验值基本相符。根据此临界值公式及其他板卷应力计算法建立的计算机程序计算了武钢森吉米尔轧机板卷的稳定性,其预测情况与现场记录相符。本理论清楚地说明了一些工艺参数,如钳口平面长度、卷取应力是如何影响板卷稳定性的。也提出了一些防止塌卷的建议。更多还原

【Abstract】 The cold rolled coiled st?ip under high winding tension often buckles while unloading from thewinder. The paper gives a description of this problem after theoretical study and experimental investi-gation. It is p?oposed that the buckling is formed by the high compressive tangential stress built-up during winding at the flat section of the innermost lap of coil above gripper of winder, whichis called gripper-flat-sectcon, then the stability of the coil is reduced. A buckling criterion for co-mpressive tangential stress was obtained and was basically in agreement with the experimentaldata with a computer program based on the critical formula and other algorithm about the stressin coil, ?e stability of strip coil winded by a Scndzimir controlled winder in Wuhang Iron &Steel Co was calculated. The predictions were conformed to the records of buckling on site. Further-more, the theory developed gives a clear picture of how these factors, such as the length of grip-per-flatsection, winding tension, influence the stabilty of strip coil. Several proposes to preventbuckling of coiled strip are presented.更多还原