中厚板轧机机架辊问题分析及改进建议

针对中厚板轧机机架辊使用过程中暴露出来的共性问题进行分析研究,并提出技术改进措施。     

二十辊轧机机架孔专用镗床加工方法

针对现有的二十辊轧机机架加工方法的弊端,设计了二十辊轧机机架专用镗床,介绍此设备的性能参数,此设备提高了轧机机架的加工精度和生产效率。     

旧825mm轧机机架传动面与换辊面的改造

北钢公司轧钢分厂的８２５ｍｍ开坯轧机是５０年代前苏产品，其工作辊磨损后原采用补焊后加工的方法，费时又费力。经研究将机架进行了改造，使检修工艺大为简化，取得了可喜的经济效益。本文说明了改造方案，并对改造后的机架立柱进行了强度校核。     

双机架四辊不可逆铜轧机张力控制分析研究

本文针对双机架不可逆冷轧机的特点和轧制工艺要求,以中铝华中铜业双机架四辊不可逆铜轧机为例,对双机架四辊不可逆铜轧机张力控制系统硬件组成、控制原理及控制方法进行了分析研究。     

立辊轧机机架强度和变形的有限元分析

对某厂新改造的立辊轧机机架进行了有限元分析,得出了符合实际情况的应力场和变形状况,根据该轧机全液压压下方式的特点,对机架立柱和横梁区域进行了重点分析,得出结论机架的强度和刚度完全可以满足生产的需要,为更深入研究该立辊轧机提供了可靠的依据.     

特钢厂轧机机架辊改造研究与应用

山东钢铁股份有限公司莱芜分公司特钢事业部轧机机架辊的故障较多,使用周期短,已经成为制约生产顺行和由此导致维修成本高的重要原因。针对粗轧机和精轧机机架辊因运行故障或出现异常,机架辊设备运行时间短的问题,通过采取保障部件润滑条件和改善设备密封性、机架辊锁紧系统和管路改造等方法,减少了设备故障,使设备的稳定性得到了提高。     

四辊可逆轧机机架辊故障分析及改造

针对3000mm中板四辊可逆轧机机架辊生产过程中易出现的各类设备故障：轴承寿命短、传动易失效等具体问题,结合现场生产条件,经过多次摸索、试制对机架辊结构进行了改造优化,收到了实际成效,实现了三钢中板轧机机架辊的使用寿命由4~6个月延长至10~12个月。     

1700 mm热轧带钢机架及辊系分析

对朝阳钢铁1700 mm轧机机架及工作辊与支承辊的接触情况进行有限元分析,找到机架和主机框架的薄弱环节.     

四辊五连轧机机架间张力控制

介绍了四辊五连轧机系统组成,机架间张力控制,辊缝式调张和速度式调张,并对四辊五连轧机机架间张力现场运行结果进行分析。对基于模糊自适应PID的张力控制及仿真研究进行了阐述。     

立辊轧机机架设计

对铸焊式立辊轧机机架和整铸式立辊轧机机架的功能和结构进行详细说明,并运用有限元软件为机架作强度和变形分析。分析结果表明整铸式机架的结构更加简洁紧凑,重量更轻,机架的整体应力分布更均匀,应力集中区域更少,应力峰值更小,机架刚度大大提高,机架结构经过优化后能够节省成本,延长使用寿命。     

张力辊理论计算及结构设计

介绍张力辊的作用及应用场合,推导张力辊设计所需的各个参数的计算公式,并通过典型实例进行验证。     

拉伸弯曲矫直机张力辊传动装置分析

拉伸弯曲矫直机被广泛应用在冷轧生产线中,用于提高带材平整度,减少残余应力,以及在带材酸洗前进行破鳞,拉伸张力和带材延伸率由机前机后张力辊实现,而张力辊的传动方式各有不同。为此对拉伸弯曲矫直机张力辊传动装置进行简要分析。     

新型热连轧机架辊

介绍热连轧新型机架辊的结构特点。     

单机架可逆冷轧机上下辊负荷平衡的控制

介绍并分析山东莱芜钢铁集团冷轧薄板厂1500 mm单机架可逆冷轧机组在正常轧制过程中,在偶道次频繁出现上、下工作辊负荷平不衡的情况及原因。通过上、下工作辊负荷平衡的电气控制调整过程,说明负荷平衡控制系统的工作原理及范围,指出其局限性。     

The interfacial transfer of aluminium to steels and ceramic materials under loaded contact at high temperatures II: Both surfaces at high temperatures

The rolling contact between aluminium strips and rolls of different materials, in which the rolls were heated in situ with an auxiliary furnace to a temperature similar to that of the strips, was studied. Rolls of solid alumina failed during the rolling of the aluminium strip; all the other rolls, including plasma spray-coated rolls, remained undamaged. Examination of the structure and composition of the coatings which developed on the rolls showed that there was more transfer for all the different rolls but that the variations between the rolls were much less than they were when the rolls were at ambient temperatures. The thick coatings formed on the rolls were predominantly aluminium metal and the characteristic structure was independent of the original roll surface structures.     

Problems of nondestructive testing of forming rolls

The principal problems that impede the wide use of nondestructive equipment in the operation of forming rolls on sheet rolling mills are studied. The study of the causes for breakdowns of forming rolls gave statistically significant distributions of depths and sizes of flaws in the backup rolls. The causes of impedances to nondestructive testing of the forming rolls are considered.     

对滚切式双边剪夹送辊装置的分析及调整方法的改进

夹送辊作为钢板滚切式双边剪的重要组成部分，直接影响钢板的剪切质量，由于调整方法不当，调整精度达不到要求等原因，致使剪切出的钢板经常出现缺陷，针对双边剪夹送辊装置的主要结构特点进行分析、明确其工作机理，通过改进其调整方法，使其达到更好的剪切质量。     

A novel continuous roll forming process of sheet metal based on bended rolls

To effectively manufacture three-dimensional sheet metal parts with various curvatures produced in small-batch quantity, a continuous roll forming (CRF) process is proposed and investigated. The sheet metal is compressed between pairs of bended rolls and formed into a doubly curved surface. The shapes of forming rolls and the gap between the two rolls are piecewise controlled at a series of points. The two bended rolls and the nonuniformly distributed roll gap between them make the sheet metal bent in longitudinal and transverse directions simultaneously after the sheet metal passes through the roll gap, and a three-dimensional surface is formed continuously with the rotation of forming rolls. The relation between longitudinal elongation distribution and longitudinal bending deformation is discussed, and the lateral spreading in CRF process is analyzed; the method to compute the roll gap and the curved profiles of forming rolls are presented. Forming experiments for torus-shaped surface parts were carried out, and the experiment results demonstrate the feasibility and validity of CRF process and the presented methods.     

Roll shape design for foil rolling of a four-high mill

In this paper, a mathematical model for a four-high mill is proposed to analyze the elastic deformation of the backup and work rolls, including their respective axial deflection and surface flatness. The contact pressure between the backup and work rolls and that between the work roll and foil are functions of the roll’s position in the axial direction. In this analytical model, the rolls and foil are divided into many small regions and finite difference or matrix methods are used to derive the deflections of the work and backup rolls as a function of the force density in the foil width direction. A camber shape at the surfaces of the backup and work rolls is designed to counteract the rolls’ elastic deformation and to make the rolled foil as flat as possible. The effects of the selected roll materials upon the rolled thickness distribution are also discussed. A thickness variation within 1 μm can be obtained for a foil of 50-μm thick and 40-mm wide under reduction of 32 % using a WC work roll with a camber radius of 150 m.     

四辊冷轧机辊系参数优化设计理论及其应用

四辊冷轧机结构设计中关键问题是辊系参数的确定,建立了包括轧机重要,轧制功率,辊间压力分布特性,纵向刚度,横向刚度和辊缝形状改变能力指标的多目标函数优化设计新模型,以上海宝钢（集团）益昌薄板公司1219冷轧机为例,进行了应用研究。