An innovative development of a four-high foil rolling mill

During foil or ultrathin strip rolling, elastic deflection variation of the work rolls at the contact surface with the strip causes non-uniform thickness distribution of the product in the width direction, which possibly causes a central wrinkling or an edge fracture on the product. This study developed a four-high prototype rolling mill, comprising two work rolls fabricated from an ultrastrength alloy. This prototype rolling mill was composed of a housing frame set, a roll set, a roll gap adjusting mechanism, and a power transmission system. The finite element analysis was used for determining the frame dimensions and work roll diameters. Several experimental rolling passes of stainless steel strips were conducted using this self-developed prototype rolling mill to achieve a 0.05-mm-thick foil product.     

2200铝箔四辊轧机辊系动态交叉微尺度行为研究

对某2200mm铝箔四辊轧机的轴向力检测时,发现在轧制运行中工作辊与支承辊在有1mm间隙的运动副辊系内的位置处于不稳定的状态.出现了工作辊与支承辊之间的动态交叉微尺度行为.该微尺度交叉导致产生超大轴向力而使工作辊止推轴承(双列角接触球轴承)超载,造成止推轴承短寿烧损事故.对该微尺度交叉行为的产生机理进行了分析,研究有助于推动四辊轧机"偏移距"力约束辊系定位理论的完善和发展,对各类薄带钢轧机设计具有参考价值.     

四辊轧机机座垂直振动仿真与分析

针对某新型铝热连轧机生产实践中因垂直振动影响板带质量的问题,在建立四辊轧机六自由度动力学模型基础上,采用数值计算与ANSYS有限元仿真相结合的方法,对其垂直振动的固有频率和响应特性进行分析,探讨结构参数对轧机垂直振动特性的影响和垂直振动对板形、板厚的影响,并从改善轧机生产工况和结构参数两个方面提出了改进轧机工作的建议.     

2800四辊轧机机座牌坊专用修复设备的设计

四辊轧机是轧制中厚板的大型关键设备,受到加工、装配和运输等条件的限制,对轧机机座牌坊的修复具有一定的难度。为此介绍轧机机座牌坊底面严重磨损的维修方案,并根据维修方案的技术要求设计专用设备进行维修加工的工艺方法。     

φ230／φ550铝箔轧机

φ230／φ550铝箔轧机是一重研制的系列铝箔轧机中的最新产品，为填补国家空白项目。     

宽幅铝箔轧机弯辊液压控制系统设计

在宽幅铝箔轧机上采用新式液压控制回路，实现轧机弯辊控制及换辊控制。系统采用新的传动介质，解决了带材的污染问题，保证液压系统稳定工作。     

轧机机架包装运输方案设计

机架是大型轧机的关键部件，如何安全快速运输，包装运输方案的选择设计是十分重要的。     

Roll profile design for shaped wire rolling with high aspect ratio

Journal of Mechanical Science and Technology - For a shape rolling process of products with a high aspect ratio, its width does not spread sufficiently, frequently resulting in the unfilling...     

板带轧机辊型在线检测装置的研究

对热轧板带轧机辊型在线检测技术进行了分析,提出采用光电式传感器构造辊型检测系统,其特点是有较强的抗干扰能力,且结构紧凑,工作可靠.轧辊在线检测与修磨技术可以及时消除各种辊面缺陷,提高产品质量.     

APC系统在高精度四辊平整机组上的应用

带钢平整机是冷轧带钢生产中主要的精整设备,对提高带钢机械性能和表面质量起重要作用,文章介绍了1100mm四辊平整机组APO控制系统的组成部分以及其主要功能的原理与实现。     

1基于LabVIEW的轧机厚度控制系统设计与仿真-TP273

介绍了轧机厚度控制系统的设计与实现,在LabVIEW平台下实现了基于TCP／IP协议的控制系统网络和控制器的建立。以某铝箔厂1700mm轧机为研究背景提取其数学模型,在一台PC上建立该轧机的动态仿真模型（仿真机）,代替现场轧机来验证控制系统。实验表明,通过这种仿真机验证的轧机厚度控制系统,如果将输入输出端口接到现场轧机中就可以完成现场任务。     

基于LabVIEW的轧机厚度控制系统设计与仿真

介绍了轧机厚度控制系统的设计与实现,在LabVIEW平台下实现了基于TCP/IP协议的控制系统网络和控制器的建立.以某铝箔厂1 700 mm轧机为研究背景提取其数学模型,在一台PC上建立该轧机的动态仿真模型(仿真机),代替现场轧机来验证控制系统.实验表明,通过这种仿真机验证的轧机厚度控制系统,如果将输入输出端口接到现场轧机中就可以完成现场任务.     

Fault diagnosis of roll shape under the speed variation in hot rolling mill

The metal processing system usually consists of various components such like motors, work rolls, backup rolls, idle rolls, sensors, etc. Even a simple fault in a single component in the system may cause a serious damage on the final product. It is therefore necessary to diagnose the faults of the components to detect and prevent system failure. Especially, the defects in a work roll are critical to the quality of strip. It is especially difficult to detect faults of a roll by using the existing frequency analysis method if the speed of the roll is changing. In this study, a new diagnosis method for roll eccentricity under the roll speed changes was developed. The new method was induced from analyzing the rolling mechanism by using rolling force models, radius-speed relationship, and measured rolling force, etc. Simulation results by using the field data show that the proposed method is very useful.     

Towards a new theory of cold rolling thin foil

The theoretical framework is developed for a new theory of cold rolling thin metallic foil. Unlike previous theories, the work rolls are allowed to deform to a non-circular profile and finite regions of no-slip between strip and work rolls are allowed to occur in the roll bite. The theory predicts that plastic reduction occurs near entry and near exit of the roll bite, separated by a central region where the strip does not suffer reduction and does not slip relative to the work rolls. As the reduction is decreased to zero the theory reduces to essentially the Johnson and Bentall theory [J. Mech. Phys. Solids 17, 253 (1969)] for the onset of plastic reduction in a strip. At large strip thicknesses and finite reductions the new theory approximates the Bland and Ford theory [Proc. Inst. Mech. Engrs 159, 144 (1948)] of cold rolling.     

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。     

冷轧机板形控制系统弯辊力预设定模型开发

针对某公司六辊冷轧机,采用影响函数法建立了辊系变形计算模型并开发了相应的计算程序。利用所建辊系变形模型结合轧机的板形控制策略,建立了针对轧机的理论和在线两种弯辊力预设定模型。实例计算表明,所开发模型精度符合实际要求,可用于生产实际,为提高轧机板形控制预设定精度,改善轧机产品的板形质量提供了理论依据。     

基于ANSYS的冷辗机芯辊有限元分析及优化设计

冷辗机是对轴承内外圈等环形零件进行辗扩加工的机床设备,在其辗压芯辊的设计中,可以用ANSYS通用有限元分析软件对初步设计结果进行参数化建模,静态、模态分析,寻找设计缺陷及优化设计.提高设计质量及效率.阐述了冷辗加工的基本原理,并详细介绍了芯辊在ANSYS下参数化建模,静态、模态分析及优化设计的一般过程.     

轧机液压升降台

冶金工业中,三辊轧机前后设有升降台,用来升降和输送轧件,升降台的升降机构多采用曲柄连杆式或者偏心轮式机械驱动机构,这类机构安置在轧机前后地坑中,工作条件恶劣,使用、维护、修理困难,装置机构庞大,耗能,工作中存在冲击,平稳性及可靠性差,故障处理时间长。...     

A robust model for rolling of thin strip and foil

A new analysis for cold rolling of thin strip and foil is developed. This model follows the approach of Fleck et al. [8], but relaxes their assumption of a central flat neutral zone. Instead of following their inverse method to obtain the pressure distribution in this neutral zone, an explicit equation for the contact pressure variation is obtained from the sticking condition in this region. This significantly simplifies the solution method, leading to a much more robust algorithm. Moreover the method treats the cases either where the roll retains its circular arc or where there is very significant roll deformation in the same way, greatly simplifying the method of obtaining solutions. This will facilitate the incorporation of other effects such as the friction models currently being developed. Results are in line with the theory of Fleck et al. [8]. The effect of entry and exit tensions on the non-dimensional load and forward slip is investigated. It is found that the effect of equal entry and exit tensions is equivalent to reducing the yield stress of the strip by this tension stress.     

金属带轧机控制系统开发

金属带式无级变速器是一种新型的传动技术.金属带轧机是金属带制造的关键设备.本文采用PLC和工业触摸屏实现了金属带轧机控制系统,金属带轧制精度满足设计要求,可实现金属带的大量生产.