共查询到20条相似文献,搜索用时 140 毫秒
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这种12辊轧机采用了不同于Sendzim ir轧机的整体机架和Sundw ig的四立柱机架,而类似于传统4、6辊轧机的整体机架。机架内装有可上下移动的上下辊箱,每个辊箱内用芯轴固定安装了两大一小三组背衬轴承。轧机在下辊箱内设有直接作用式板形调节装置。轧机采用小抛线型直接作用式液压压下装置。这两台轧机均可将厚3~2.75mm的热轧带钢不经中间退火轧制成0.3~0.2mm成品厚度的冷硬带钢。 相似文献
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HC轧机采用中间辊轴向窜动技术,使轧机的横向刚度显著增加,提高了板形控制能力。但由于中间辊轴向窜动后,在工作辊与中间辊、中间辊与支撑辊间形成接触压力峰值,导致轧辊局部磨损及带材表面质量问题。建立了HC轧机板形和断面形状计算模型,研究了支撑辊及工作辊辊型曲线对辊间接触压力分布的影响规律,在此基础上优化了1220HC轧机支撑辊及工作辊辊型曲线。理论计算及工业生产试验表明,在保证轧机板形控制能力前提下,在HC轧机支撑辊及工作辊上采用合适的辊型曲线,可将支撑辊与中间辊间的接触压力峰值降低20%以上,将工作辊与中间辊间的接触压力峰值降低10%以上,从而避免辊间接触压力峰值带来的轧辊局部磨损及相应的带钢表面质量问题。 相似文献
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简要介绍了引进的铜带四辊精轧机,从轧机的厚度控制、板形控制、带材表面质量控制和轧机的状态轧制等各方面阐述了轧机的控制原理和方式,以及在高精度铜板带生产上的实践。 相似文献
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为减少冷轧带钢的非对称板形缺陷的产生,设计了工作辊非对称弯辊控制系统.应用影响函数法计算辊系变形,同时考虑辊缝中金属横向流动对带钢出口横向张力分布的影响,通过迭代法计算出工作辊两端施加不同弯辊力后的辊间压力分布、出口厚度横向分布以及出口横向张应力分布.理论分析结果表明,工作辊非对称弯辊可以在一定程度上改善辊间压力分布不均,减轻轧辊磨损和减少轧辊掉皮事故的发生,降低带钢边部的非对称板形缺陷.实际应用结果证明,当倾斜调整量小于10%时,应用工作辊非对称弯辊替代倾斜调整,可以获得更好的板形精度. 相似文献
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冷轧平整板形控制工艺探讨 总被引:1,自引:0,他引:1
介绍了平整过程中影响板形缺陷的因素,提出了解决平整过程中板形缺陷的主要因素是轧辊的辊型控制,并分析指出了生产实际中可通过合适的原始辊型凸度、调整液压弯辊装置、倾斜轧辊以及调节轧制压力和带钢张力来改善平整板形的控制方法。 相似文献
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XIAO Hong XIE Hongbiao ZHAO Tieyong School of Mechanical Engineering Yanshan University Qinhuangdao Hebei China 《Baosteel Technical Research》2010,(Z1)
Using three-dimensional rigid-plastic finite element method base on Lagrange multiplier to analyze the deformation of strip,influence function method to calculate the elastic deflection of rolls and three-dimensionalelastic FEM to analyze the flattening deformation between work roll and strip,a coupled model was established with a iteration way.The effect of various kinds flatness control method such as bending force,rolls shift and cross angle and also various kind of influence factors such as friction ... 相似文献
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针对冷连轧机组中的6辊CVC轧机,利用大型非线性有限元软件MSC.Marc建立仿真模型,对多种轧制条件下轧件的弹塑性变形和辊系的弹性变形进行了耦合计算,得到了6辊CVC冷轧机工作辊弯辊、中间辊弯辊、中间辊横移的板形调控功效离散值。研究了不同轧制工艺参数、轧件参数和轧辊参数对各板形调节机构调控功效的影响规律,并得出相应的板形调控功效系数。以有限元计算结果为样本,利用BP神经网络强大的非线性映射功能,建立了板形调控功效的神经网络计算模型,为板形在线闭环控制模型提供高精度的板形调控功效,解决了有限元计算耗时长,难以满足在线控制要求的问题。 相似文献
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论述了四辊可逆板带冷轧机较大的弯辊力对昂贵的轧辊及轧辊轴承使用寿命的影响,通过研究辊系的弹性变形曲线,找出合理辊系凸度曲线来降低弯辊力. 相似文献
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The work roll bending control has a strong ability to eliminate the symmetrical flatness defects of strip. However, if the incoming strip is coming with severe symmetrical flatness defects, it happens that the position limit of work roll bending is prone to be reached or exceeded during the execution of the displacement, resulting in the residual symmetrical flatness defects without further elimination, as well as a limited flatness control process. Abilities of work roll bending and intermediate roll bending / shifting for flatness control have been analyzed based on the actuator efficiencies for the purpose of solving the problem of work roll bending control reaching threshold. Meanwhile, a self‐learning determination model of actuator efficiency factors, which can be utilized to determine the actuator efficiency factors online accurately, was developed from the measurement data extracted from the rolling mill. Models of intermediate roll bending and intermediate roll shifting substitution control in case of work roll bending control over‐limitation have been developed, in accordance with the practical conditions and the degree of work roll bending over‐limitation. Applications show that the substitution control can play an important role in the residual symmetrical flatness deviation control, which should have been removed completely by the work roll bending control. 相似文献
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LIJunhong QIXiang-dong LIANJia-chuang 《钢铁研究学报(英文版)》2004,11(5):32-36
Flatness and profile are important quality indexes of strip. Combining the influence function method to solve the elastic deformation of roll system with the variational method to solve the lateral flow of metal, the flatness and profile of the strip during cold eontinuous rolling were simulated. The B3 spline funetion was used to analogize the lateral distribution of strip thickness. The transverse distributions of the exit thiekness and the front tension stress for eaeh pass were obtained. Compared with the measured results, it is proved that using the spline funetion to analogize the lateral distribution of strip thickness ean improve the ealculation accuraey of flatness and profile largely. 相似文献