矫正机辊系装配要点

矫正机辊系是整套设备中机械精度最高的部件,整个辊系的装配是保证矫正机质量最关键因素之一。装配过程的精细化管理及严格执行装配工艺是制造优质产品的重要保证。     

斜辊钢管矫正机主要设计参数的选择及其对矫正质量的影响

首先对斜辊钢管矫正机主要设计参数对矫正质量，矫正稳定性，矫正辊磨损及机器受力等因素的影响进行了讨论，然后又讨论了矫正机的调整对矫正质量的影响，对矫正机的科学设计和合理使用都是有帮助的。     

细长形工作辊的热处理工艺试验

工作辊是23辊矫正机的关键零件。因其结构细长,表面淬火时容易变形,所以加工难度较大,通过热处理工艺试验,总结出了一套加工细长工作辊的成功经验,从而保证了23辊矫正机产品的质量。     

普钢3500 mm中厚板矫正机技术改造

太重矫正机研究所对现存十一辊板材矫正机进行技术改造的内容包括:提高矫直速度,实现不停产在线调整支承辊和工作辊之间的间隙,压力传感器安装位置和万向接轴的方便拆装等。改造后提高了矫正机的性能,满足用户工艺需求,提高了生产效率和产品质量。     

机械行业新标准介绍

正根据中华人民共和国工业和信息化部公告2017年第14号,以下机械行业新标准2018年1月1日实施。1)JB/T 13121—2017《铝型材辊式矫正机》为首次制定标准,规定了铝型材辊式矫正机的产品型式与基本参数、技术要求、试验方法、检验及验收规则、标志、包装、运输和贮存。适用于在常温状态下进行铝型材截面矫正的辊式矫正机,其它行业中类似的矫正机可参照执行。     

一种简易矫正机的设计

介绍了简易辊式矫正机的矫正原理和结构特点,重点介绍了矫正机设计中的参数选择和确定的方法。     

辊式板材矫正机压下量计算

利用弹塑性变形理论,分析了金属板材在辊式板材矫正机中的弯曲变形,通过弹塑性弯曲分析,得出了辊式板材矫正机压下量的计算公式。     

宽厚板矫直机辊系的维护性调整

矫直机辊系使用过程中会因为矫直钢板的规格和矫直工艺的多样性产生不均匀磨损,因此需定期检查辊系的磨损状况,采用适当的修磨方式,调整恢复辊系的装配精度。     

牵伸辊装配过程控制研究

概述了牵伸机在特种纤维生产过程中的重要性,分析了其传动部件牵伸辊的装配工艺过程及重点.针对超长辊轴一体牵伸辊在装配中遇到的问题,设计了一种拉码工装,能有效控制装配过程,保证牵伸辊的径向圆跳动达标.     

新型十三辊矫正机的结构性能及特点

介绍新型十三辊矫正机的结构性能及特点。该套设备在设计上做了较大改进 ,它的投产对于我国矫正机结构的研制起到推进作用。     

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.     

有限差分法在轧辊温度场计算中的应用

对轧辊和轧件的接触区及非接触区对流换热系数进行等效处理,采用有限差分法计算工作辊的温度场,并对冷却水对轧辊热凸度的影响进行分析.     

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.     

Analysis of the bending of the rolling material in asymmetrical sheet rolling

In asymmetric rolling the workpiece is often bent to an unexpected shape. Its curvature may be caused by a speed difference, by a lubrication mismatch or a radius difference of the work rolls, and depends on various rolling parameters, such as the ratio of the peripheral velocities of the upper roll and the lower roll, reduction ratio, average radius of the work rolls, initial plate thickness and friction between the rolls and the workpiece. A finite element simulation, which shows the influence of different diameters of the working rolls and of the degree of reduction on the bending of the workpiece, has been performed.     

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。     

高速轧钢机轧辊失效分析

利用金相分析、能谱分析等方法 ,对高速轧钢机轧辊早期失效原因进行分析 ,得出因轧辊中的成分偏析造成早期失效 ,并提出改进措施。     

六辊CVC轧机辊系变形的有限元分析

建立了运用有限元软件ANSYS求解具有特殊辊廓曲线和辊间接触状态的六辊CVC轧机辊系三维弹性变形的有限元模型，合理解决了对辊间接触压扁变形的建模问题，实现了对较复杂变形的求解。以国内某1420冷轧机组为研究对象，结合现场实际数据，运用有限元软件ANSYS求解六辊CVC轧机的辊系三维弹性变形，计算结果与实测数据吻合较好。     

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.