近年来,国内外设计生产的铝带材冷轧机都有展平辊装置,其辊数为5辊或3辊。如在我国投产的轧机中,900轧机有5个φ110展平辊,1600轧机有5个φ160展平辊,1200轧机有3个φ130展平辊,我院设计的1300轧机有5个φ120展平辊。展平辊与轧辊的关系见图1。本文将从理论上阐明展平辊的工作原理,说明展平辊只允许在带材入口侧工作的理由,以及给出参数确定的计算式。我们认为,展平辊适用于所有带材冷轧 In recent years, domestic and foreign design and production of aluminum strip cold rolling mill has flat roll device, the number of rollers 5 or 3 rolls. As in the rolling mill put into operation in China, there are 5 φ110 flattening rollers in the 900 rolling mill, 5 φ160 rolling flat rollers in the 1600 rolling mill, 3 φ130 rolling flattening rollers in the 1200 rolling mill, and five φ120 rolling flattening mills in our hospital Roller. The relationship between rolls and rolls is shown in Figure 1. This paper will clarify the working principle of the flattening roller theoretically, explain the reason that the flattening roller only allows to work on the entrance side of the strip, and give the formula for determining the parameters. We believe that the flattening roller is suitable for all strip cold rolling