介绍了十二辊板带冷轧机所使用的卷取机卷筒的结构特点 ,并对其扇形块变形、键槽裂纹等缺陷的形成进行分析 ,对现存在的问题进行了改善性维护 ,保证了生产的正常进行。同时也对原设计作了改进。 This paper introduces the structure characteristics of the rewinder reels used in the 12-roll strip cold rolling mill, analyzes the formation of defects such as the deformation of the segments, the crack of the keyway and so on, and improves the existing problems and guarantees The normal production. At the same time also made improvements to the original design.