Profile and flatness control technology for schedule-free rolling in hot wide strip mills
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摘要: 針對無取向硅鋼連續自由編排"批量同寬"的自由規程軋制要求,自主開發了ASR-C非對稱自補償工作輥技術.采用ANSYS建立了三維輥系有限元模型.有限元分析和工業應用試驗發現,ASR-C工作輥無論是在帶鋼寬度變化時,還是在軋制單位完整服役期內,均具有穩定的凸度和磨損控制雙重能力,同時ASR-C工作輥增強了輥縫橫向剛度和彎輥力的調節效率.在武鋼1 700 mm熱連軋機進行了2.55 mm×1 280 mm寬幅無取向硅鋼"批量同寬"軋制的ASR-C工作輥工業試驗.結果表明,凸度 ≤ 45μm的帶鋼比例由常規工作輥的41.8%提高到98.2%,凸度>53μm的帶鋼比例從33.9%下降到1.8%,ASR-C工作輥輥形自保持性達到88%.ASR-C技術取得顯著穩定的凸度和磨損控制效果,實現了"批量同寬"的自由規程軋制.Abstract: In order to meet the requirement of schedule-free rolling for wide non-oriented electrical steel strip production with a large number of the same width strip rolling campaigns, an asymmetry self-compensating work roils (ASR-C) technology was developed. A three-dimensional finite element analysis model of roll stacks was built by ANSYS software package. The finite element analysis and industrial tests indicate that the developed ASR-C technology has both crown control ability and wear control ability for different widths of strips or different rolling periods within the entire roiling campaign. At the same time, the roll gap stiffness and the crown control range by bending force with asymmetry self-compensating work rolls are greater than those with conventional work rolls in hot finishing mills. The ASR-C technology has been applied to production of the same strip-width 2.55 mm× 1280 mm wide non-oriented electrical steel strips in the 1700 mm hot strip mill of WlSCO for test. The industrial test results show that the rate of the measured strip crown less than 45μm is increased from 41.8% to 98.2%, the rate of the measured strip crown more than 53μm is decreased from 33.9% to 1.8%, and the self-maintenances of roll contours for ASR-C reach to 88%. The schedule-free rolling (SFR) for a large number of the same width strip rolling campaigns is significantly achieved by the ASR-C technology with stable crown control ability and wear control ability.
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Key words:
- hot strip rolling /
- profile and flatness control /
- roller wear /
- finite element analysis
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