Development and application of the asymmetry work roll for hot strip mills
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摘要: 熱軋精軋機組下游機架既要實現板形控制,又要均勻化軋輥磨損以實現自由規程軋制.同時,硅鋼、集裝箱用鋼等專用鋼邊部減薄嚴重,常規的板形控制手段難將凸度控制到目標值.開發了非對稱工作輥,輥身一端帶特殊曲線,上下工作輥成反對稱放置.改變軋輥的軸向位置,帶鋼凸度變化量可超過150μm.設計了針對該工作輥的特定竄輥策略,帶鋼邊部板形可得到有效控制.改善了軋輥磨損輥形,有利于實現自由規程軋制.在鞍鋼1700ASP生產線上的使用實績表明,采用非對稱工作輥后,硅鋼凸度降低了29.8%,高強度鋼的凸度可降至50μm以下,且凸度控制穩定.Abstract: Both shape control and uniform roll wear for schedule-free rolling should be realized in the downstream stands of the finishing trains of hot rolling, and the edge drop of some special steel grades such as silicon steel and container steel is large. It is much difficult to get the target crown by conventional shape control means. The asymmetry work roll with a special curve at one roll body end was developed. The top work roll and bottom work roll are placed anti-symmetrically. As the roll axial position is changed, the variation in strip crown is over 150μm. In order to control the strip edge profile efficaciously, a relevant shifting strategy of this roll was designed. At the same time, the wear contour of the work roll can be improved and it is helpful for schedule-free rolling. The application of the asymmetry work roll in the 1700ASP product line of Ansteel shows the crown of silicon steel is reduced by 29.8 96 and the crown of high strength steel can be controlled below 50 μm stably.
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Key words:
- hot strip mills /
- shape control /
- work roll /
- roll contour /
- schedule-free rolling
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