在带钢轧制过程中,张力对于钢带质量及顺利轧制是一个很重要的影响因素,要求带钢张力(前张力和后张力)在某一轧制道次开始至终了保持不变。一般轧机带钢的张力是由卷取机实现的。所以,这就要求卷取机的卷取速度保持一定(即与轧机同步),并控制卷取张力保持在大体一定的变化范围内。目前我厂除直流拖动张力卷取机外,大部分交流轧机的卷取机不能满足上述要求, During the strip rolling, the tension is a very important factor for strip quality and smooth rolling. It is required that the strip tension (pre-tension and post-tension) remain unchanged from the beginning of a rolling pass. General mill strip tension is achieved by the coiler. Therefore, this requires that the coiler take up a constant speed (ie in synchronism with the rolling mill) and control the winding tension to remain within a generally constant range of variation. At present, I plant in addition to DC drag tension coiler, most of the AC rolling mill coiler can not meet the above requirements,