Abstract:Abstract: roll is wide strip rolling appearance quality is an important index, good scrolls is guarantee customer normal use and downstream of the basic requirements, as well as the embodiment of steel rolling technology level, is the epitome of the brand. 1500mm hot-rolled broadband line in lai steel production parts specifications varieties, roll defects, causing collapses under procedure and customers to use ShiGang volumes of kaiping difficulties. The collapse of roll defects appeared after cutting steel coil is to use after cutting metal loss increases, and enhanced the worker's Labour intensity. Based on the characteristics of the equipment, process defect causes, and find out effective control measures.