共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
轧辊热凸度与轧辊冷却水系统有着密切的关系。充分了解轧辊热凸度在轧制过程的变化,可以及时掌握轧辊冷却水系统的工作情况,从而对其进行调节,为板形控制打下良好的基础。 相似文献
5.
本文通过对4200mm轧机轧辊弹性变形和热凸度的理论计算和实际测量,开发了适合该轧机使用的凸辊型,并在应用中完善优化,板凸度的明显下降,提高了金属收得率,改善 轧辊的受力状况,降低了轧辊的磨损和破损。 相似文献
6.
Citisteel 4060mm 宽厚板轧机板形问题的分析和改进措施 总被引:1,自引:0,他引:1
通过对 Citisteel三年板凸度数据的分析 ,认为采用合理的配辊制度和精心操作可提高板形质量 ,通过增加轧辊原始凸度可降低平均板凸度 ,但不能改进板凸度的标准差 ,因此生产出来的钢板凸度波动较大。分析后认为采用动态设定板形测控方法的板形最佳规程 ,不但可以进一步降低平均板凸度 ,而且可以大大降低其标准差。通过与中国首钢和舞钢两套宽厚板轧机对比及参考它们的经验 ,Citisteel工作辊换辊周期应当减小 ,轧 4 0 0 0 t左右换一次工作辊比较合适。文中提出用动态设定型板凸度模型建立轧辊热凸度模型的新方法 相似文献
7.
8.
9.
10.
轧辊热凸度是影响热带钢连轧机负载辊缝的重要因素,高效率的工作辊冷却水系统是生产高质量热轧板带的重要保证。为了设计工作辊的冷却水量及分布,建立了工作辊横断面温度场计算模型、轴对称平面温度场计算模型和热凸度计算模型。在此基础上,采用优化设计方法对1450热带钢连轧机工作辊冷却水量及其沿轧辊周向和轴向的分布进行优化设计。 相似文献
11.
GUO Zhongfeng LI Changsheng XU Jianzhong LIU Xianghua WANG Guodong 《钢铁研究学报(英文版)》2006,13(6):27-0
Thermal crown of roll is an important factor, which affects strip profile. It is necessary to analyze the temperature field and thermal crown of roll for hot strip mill. A new simplified finite element method (FEM) was used to analyze the temperature field and thermal crown of roll, and corresponding models were built according to the practical boundary conditions. Transient roll temperature field and thermal crown were simulated by ANSYS FEM software with considering transient thermal contact and complex boundary condition. Temperature and thermal crown variations on roll surface nodes were obtained. The thermal crown results of roll obtained by FEM simulation were in good agreement with the measured data, indicating that simplified FEM models and results were correct. 相似文献
12.
工作辊冷却及热凸度控制技术 总被引:1,自引:0,他引:1
良好的工作辊冷却及热凸度控制是降低工作辊消耗,控制板型,提高生产收得率的有效措施,通过控制冷却,可以改善工作辊冷却效果,防止工作辊出现严重热裂纹,减少工作辊磨损进而减少换辊次数,避免不良板形的产生,本文介绍了工作辊的温度模型,磨损模型及热凸度控制模型,并对国外两种类型的工作辊冷却及热凸度控制技术进行了分析。 相似文献
13.
Jiankang Xing Yan Peng Jianliang Sun Caiyi Liu Silvia Barella Andrea Gruttadauria Marco Belfi Carlo Mapelli 《国际钢铁研究》2023,94(9):2300022
Flatness and surface quality are important quality indexes of strip steel, and roll wear will directly affect the product's flatness and surface quality. Online roll profile measurement technology can obtain the information of roll profile in real time, guide the optimization of roll change rhythm, and improve the flatness control ability of rolling mill and surface quality of strip product. However, the error caused by roll displacement, clearance, roll thermal crown, and other factors is usually the same order of magnitude as the roll shape or roll wear, or even one order of magnitude higher. So error compensation is the key to ensuring the accuracy of online roll profile measurement. Herein, the position measurement technology of the roll bearing block is considered in the online roll profile measurement, and the measurement error caused by the deviation of the roll axis is separated. The thermal crown model is established to separate the measurement errors caused by the thermal crown. The error compensation model of online roll profile measurement is established, and the simulation calculation is carried out. This error compensation method is of great significance to improve the accuracy of online roll profile measurement and realize the fine management of mill roll in service. 相似文献
14.
轧辊作为辊型电磁调控技术的核心构件,在加工制造时必须进行热处理,改变轧辊表层组织形态,形成轧辊表面淬硬层,引起轧辊表层和芯部材料性能差异,而这种差异会对辊型电磁调控特性产生影响。为此,利用有限元软件MSC.MARC建立了电磁 热 力耦合轴对称模型,并依托辊型电磁调控试验平台对模型精度进行校核。在此基础上,依托模型分析了表面淬硬层厚度对辊型电磁过程中辊凸度、辊型曲线、接触面平均正压力及轧辊应力分布的影响。结果表明,表面淬硬层厚度对辊凸度、辊型曲线和接触面正压力的影响较小,但对轧辊应力分布有明显影响,特别是轧辊表面淬硬层中心区域。 相似文献
15.
16.
结合邯钢CSP生产线实际条件,从轧辊凸度、热凸度和磨损等方面对影响带钢板形的因素进行了分析。在现场设备条件允许的前提下,采取增大轧辊凸度调节范围、改变轧制顺序、应用新型设备和完善拄制程序等措施,改善了热轧带钢板形质量。 相似文献
17.
轧辊热膨胀对承载辊缝形状和带钢板形具有显著的影响,而准确预报轧制过程中轧辊热膨胀是板形控制中的难点之一。针对某热连轧生产线单辊期内热膨胀量与轧辊温度不收敛的问题,利用自主开发的与产线生产完全一致的板形模型分析测试系统对热凸度二级模型进行了仿真分析与研究,提出了一种有效提高工作辊热平衡收敛性的优化方法,并进行了生产应用。该优化方法的应用解决了该热轧产线单辊期内热平衡不收敛的问题,消除了轧辊温度计算值和实测值之间的偏差,不仅提高了模型的预报精度,也大幅提高了该产线轧制带钢的凸度控制精度。 相似文献
18.
19.
MA Zhanfu) LI Ziwen) ZHAO Xicheng) ) Xi' an University of Architecture Technology Xian Shanxi China ) Xinijang Bayi Iron &steel Co. Ltd. Wulumuqi Xinjiang China 《Baosteel Technical Research》2010,(Z1)
Studied the distributing of roll temperature and the change rule of thermal crown in 1 750 hot strip mill,the result of the test showed that the change of roll thermal crown was affected by the condition of roll cooling and equipmentthe roll thermal crown was obviously improved after altering the pipe and water nib of cooling equipment.From the rule of roll thermal crown changing with the number of strip rolling know that the thermal crown of work roll of Standi is the largest,and Stand 6 is the smallest... 相似文献