HC轧机辊系优化设计

本文在采用分割模型影响函数法计算辊间接触压力基础上，对ＨＣ轧机辊系进行了优化设计，优化值符合实际使用情况。     

二辊轧机轧辊轴向调整装置的结构探讨

二辊轧机是中小型轧钢生产中一种主要的轧制设备，其轧辊装配及轴向调整装置直接影响轧辊孔型定位及轴向刚度，是保证产品质量的重要组成部分。本文对此进行了分析探讨。     

UPC轧机轧辊辊面曲线的探讨

讨论了ＵＰＣ轧机轧辊辊面曲线的形成，推导了曲线方程，计算并讨论了抽辊量，方程系数和轧件宽度对辊缝轮廓的影响。     

连轧机工作辊轴向力有限元分析

分析了九种工况下，工作辊轴线水平交叉角α，工作辊轴线铅垂交叉角β，交叉点距轧辊中心线的距离ｌ对工作辊轴向力的影响，计算结果对生产有一定指导意义。     

350／700连轧机组的测试与故障分析

对８５０／７００连轧机组在工作所出现的问题，进行了初步的理论分析，提出了诊断事故原因的最佳方案，准确的测取和了有关参数，为进一步的故障分析提供了可靠依据；轧件咬入困难的主要原因是由各架轧机的下量分配不够合理造成的，第六架轧机传动据矩过大，是由严重拉钢引起的。     

辊凸度连续可调（CVC）轧机的轧辊辊面曲线

讨论了辊凸度连续可调（Ｃｏｎｔｉｎｕｏｕｓｌｙ Ｖａｒｉａｂｌｅ Ｃｒｏｗｎ）轧机轧辊面曲线的形式，推导了曲线议程，对比了辊缝轮廓，同时还讨论了抽辊量、辊径差、轧件宽和曲线极值点位置对当量辊凸度的影响。     

UC轧机中间辊非对称弯辊改善辊间压力分布

为了改善UC轧机辊间压力不均匀分布问题,采用中间辊非对称弯辊系统替代原有对称弯辊系统.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张力横向分布的影响,通过迭代方法计算出中间辊两端施加不同弯辊力后的辊间压力分布、出口厚度横向分布与出口张力横向分布.理论分析和实际应用结果表明,中间辊非对称弯辊可以改善辊间压力分布不均,降低轧辊磨损和减少轧辊辊面剥落,且不会影响成品带钢的厚度和板形.     

板带钢轧机的发展和展望

本通过对板带钢轧机的发展过程的分析，特别是分析了不同板带钢轧机结构对钢板精度的影响，指出了现代板带钢轧机的发展方向。     

KDD-based rolling schedule model for plate mill

A novel method for generating a rolling schedule is presented, which is fundamentally different from the existing ones. KDD (knowledge discovery in database) techniques are applied for discovering association rules between rolling parameters in a large database of rolling operation, and based on these rules, the schedule for the crucial last six finishing passes is generated. Operational evaluation shows that the schedule generated by the new method outperforms that generated by existing methods. It also shows how in this application the human‘s domain knowledge is applied to speed up the KDD process and to ensure the validity of the knowledge discovered.     

轧机主传动万向接轴随机疲劳设计

万向接轴是轧机主传动系统的关键部件,具有结构复杂、工作时承受随机冲击扭矩等特点。在分析轧机主传动万向接轴受力特点的基础上,提出应以轧机冲击扭矩载荷谱作为主传动万向接轴的疲劳设计载荷;计及低于疲劳极限的应力循环对裂纹发展的影响,采用修正后的材料p-S-N曲线并运用累积损伤理论对万向接轴进行随机疲劳设计和寿命预测。提出的轧机主传动万向接轴随机疲劳设计方法同样适合于具有同类载荷特征机械零件或结构的疲劳设计。     

轧钢机油膜轴承临界轧速与板厚调控分析

板带轧机广泛应用全膜润滑的滑动轴承，由于在轧制过程中轧制速度的变化较大，由此产生动压轴承的膜厚变化，这必然对板厚精度产生影响，本文采用有限元方法求解雷诺方程，对形成动压润滑的临界轧速以及影响板厚精度的轧速与油膜厚度的关系进行计算机数值模拟，以评价不同轧制工况下油膜轴承的承载特性参数，计算得出不同轧制工况下板厚变化预报公式，实现了更为精确的计算机板厚控制。     

Modeling and identification of HAGC system of temper rolling mill

Including servo valve, hydraulic cylinder, mill and sensor and ignoring nonlinear factors, the linear dynamic model of hydraulic automatic gage control（HAGC） system of a temper rolling mill was theoretically derived. The order of the model is 4/4, and can be reduced to 2/2. Based on modulating functions method, utilizing numerical integration, we constructed the equivalent identification model of HAGC, and the least square estimation algorithm was established. The input and output data were acquired on line at temper rolling mill in Shangshai Baosteel Group Corporation, and the continuous time model of HAGC system was estimated with the proposed method. At different modulating window intervals, the estimated parameters changed remarkably. When the frequency bandwidth of modulating filter matches that of estimated system, the parameters can be estimated accurately. Finally, the dynamic model of the HAGC was obtained and validated based on the spectral analysis result.     

型钢轧机的MES控制系统

分析了我国钢铁企业信息化建设的现状以及MES系统在钢铁企业的应用.针对钢铁企业信息化过程中的基础自动化层与经营管理层实时数据脱节问题,提出了型钢轧机MES控制系统的控制等级、主要功能模块等.     

Backup roll contour of a SmartCrown tandem cold rolling mill

SmartCrown was a new system developed by VAI for improving the strip profile and flatness control first applied in 1700mm tandem cold rolling mills at Wuhan Iron & Steel (Group) Corporation (WISCO). After tracing and testing, the application of the conventional crown backup roll matching the SmartCrown work roll of the production mill led to heavy and nonuniform wear, and the edge spalling of the backup roll often occurred. A 3-dimension finite element model of roll stacks was established, which was used to analyze the above-mentioned problems, and it was found that the main reason was the highly nonuniform contact pressure distribution between the work roll and the backup roll. A new FSR (flexible shape backup roll) was developed and applied in 1700mm tandem cold rolling mills. A lot of good actual effects of FSR, such as evident improvement in profile and flatness of strips,non-occurring edge spalling, wear uniform, and remarkable decrease in roll consumption were validated by long-term industrial applications.     

Multi-objective optimization of rolling schedule based on cost function for tandem cold mill

In terms of tandem cold mill productivity and product quality, a multi-objective optimization model of rolling schedule based on cost fimction was proposed to determine the stand reductions, inter-stand tensions and rolling speeds for a specified product. The proposed schedule optimization model consists of several single cost fi.mctions, which take rolling force, motor power, inter-stand tension and stand reduction into consideration. The cost function, which can evaluate how far the rolling parameters are from the ideal values, was minimized using the Nelder-Mead simplex method. The proposed rolling schedule optimization method has been applied successfully to the 5-stand tandem cold mill in Tangsteel, and the results from a case study show that the proposed method is superior to those based on empirical formulae.     

梅钢1420冷连轧机轧制力模型的开发及应用

梅钢1420轧制力模型在Hill方程基础上,分解提炼3个关键因子,建立了显函数的轧制力模型,并进行变形抗力参数和摩擦系数参数的自适应修正以提高轧制力模型精度．经生产实践数据检验,该模型自适应系数在0．9～1．1以内,满足模型在线控制要求．