中厚板轧机平面形状控制功能的在线应用

 对平面形状控制理论模型进行简化，将厚度变化区间内厚度变化量与长度简化成线性关系；应用考虑全粘着条件的前滑模型，通过离散化处理计算楔形段轧制过程时间；确定平面形状控制参数，并进行极限值的检查修正。在现场成功实现平面形状控制功能，获得较好的效果。     

3800mm中厚板轧机平面形状控制功能的应用

对平面形状控制理论模型进行了简化,并将厚度变化区间内厚度变化量与长度简化成线性关系;确定平面形状控制参数,并检查修正了极限值。利用自主开发的2级计算机控制系统在新钢3800mm中厚板轧机上实现了平面形状控制功能,获得了较好的控制效果。     

唐钢3500mm轧机平面形状控制的研究与应用

唐钢3 500 mm中厚板生产线产品的钢种和规格较多,展宽比不合适时,钢板的矩形度难以保证,造成切损量多,成材率低。平面形状控制技术就是根据坯料在不同展宽比和延伸比条件下头、尾、边部的不均匀变形程度,在成形、展宽过程中进行变厚轧制,以改善钢板矩形化程度,减少头尾和边部剪切损失,提高成材率。唐钢中厚板材有限公司通过轧机设备改造,实现了轧机的平面形状控制功能。该功能投用后四切成材率提高了0.8%。     

中厚板平面形状数学模型的建立

详细分析和研究了中厚板平面形状的预报和控制模型的结构与建立的方法，并阐明了今后开展厚板平面形状控制的意义。     

中厚板平面形状计算机控制系统

基于对中厚板平面形状控制具体特点的分析与研究,提出了中厚板平面形状控制方案。以分布式计算机控制系统作为控制计算机,以三机架冷连轧机第２机架作为模拟同进行了研究,并给出实验结果。     

中厚板平面形状控制途径探讨

本文通过现场工艺参数的相关分析及人工神经网络技术的应用 ,对影响平面形状的因素进行了定量分析 ,从而实现计算机选料和立轧规程优化 ,获得平面形状最佳的效果。     

中厚板轧制平面形状模糊控制

在总结人工操作的经验上,给产面形状特征模式和模糊校正控制规则,并设计了模糊一神经网络校正设定系统。     

中厚板轧机压下控制技术的应用

从技术内容、设备以及技术实现方法等方面论述了中厚板轧机压下控制技术和压下控制系统的应用，并指出当前的问题是应该重视压下控制技术的工程应用水平。     

Optimisation of edging amount for high accuracy plan view control in plate mill

Algorithm to optimise the edging amount for high accuracy plan view control has been developed to improve plate yield. To produce rectangular shape of rolled plate, the edging amount that can minimise the crop length and width deviation must be determined from the operational analysis of plate mill. For the plan view control, new mathematical models to predict crop length at the top and bottom ends and width deviation at side ends are developed on the basis of statistics and back propagation learning algorithm of neural network. Using new mathematical models, under given rolling conditions of broadside and finishing pass and the permissible tolerance in width deviation, optimised algorithm which can achieve high accuracy plan view pattern is proposed. The application of newly developed algorithm in actual plate mill for plan view pattern control reduced width deviation by 20%, and crop length by 30% on average with a suitable fishtail crop shape.     

Regression models for predicting plate plan view pattern during wide and heavy plate rolling

Abstract

On the basis of Shagang Group’s 5000 mm heavy plate mills, conventional rolling processes with different broadside rolling ratios were simulated by the three-dimensional rigid plastic thermomechanical finite element (FE) model developed in the author’s previous work. By analysing the simulation results, it was found that the final plate plan view patterns after hot rolling processes were bound closely to the broadside rolling ratio and the finishing rolling ratio. Then, predictive models for plate end edge shapes and side edge shapes were formulated by nonlinear regressive analysis of the simulation results and modified by the lengths of the uneven shapes for higher accuracy. The validity of the prediction models was confirmed by comparing the predicted concavity and convexity lengths with those measured from industrial tests. The predicted plate edge shapes were in good agreement with those of the FE simulation. On the basis of the plate plan view pattern prediction models, methods to improve the plate plan view pattern are discussed.     

Tapered heavy reduction technology for plate mill

This paper describes the benefits,technical difficulties and disadvantages of the current heavy reduction solutions for plate production.For updated plate mills,this paper gives a better idea for the heavy reduction control in the rolling process.That is to keep the reduction amount constant in the front-end and back-end sections of the plate and to adopt tapered rolling with variable reduction in the middle section of the plate.This solution (already applied for a patent) can not only fully utilize the capacity of the mill motors,but also prevent difficulties in plate biting caused by the conventional heavy reduction solutions with excessive draft.This technical solution has been implemented at the 5 m plate mill plant of Baosteel,and industrial tests have proved the feasibility of it.This paper presents and analyzes the industrial test data and proves that the tapered heavy reduction technology can reduce the number of rolling passes.In addition,this paper looks forward to the future research in this area.     

中厚板轧制任务排序模型的研究与应用

针对国内大部分中厚板轧制任务顺序依赖人工经验设定的现状,依据来自中厚板轧制工艺和设备限制的两个主要排序原则,建立了以成品表面质量为最佳的轧制任务排序数学模型。对整个换辊周期内的所有待轧坯料进行一次性排序,从而获得全局最优排序结果。该模型以单个任务为节点建立网络图,将排序问题转化为最短路径问题,并利用动态规划法对其进行求解。现场在线应用结果表明,利用该排序模型得出的成品宽度曲线严格符合＂棺材形＂,在一定程度上改善了成品的表面质量和板形,并减轻了轧辊磨损程度,因此具有良好的应用前景。     

韶钢宽板轧机板形控制实践

板形控制技术是中厚板生产的标.韶钢宽板轧机生产线的板形控制实践,充分发挥了板形控制工艺设备技术的功能,取得了较好的实物产品质量和较高的技经指标.     

Research and control for rolling torque of the heavy plate mill

Sometimes main driver motors' torque exceeds the maximum limit in Baosteel's 5 m heavy plate mill. Experience showed that torque overloaded occurred in cases of some special rolling sequence and special rolling plate dimension.Most of the overloaded occurred only instantaneous at some time point during the rolling pass, which especially easily happened at the bite and motor acceleration time after the bite.This paper analyzes the impact factors for motor torque overload and carefully studies the key deta...     

中厚板立辊轧机辊缝自动控制

介绍武钢中厚板分厂立辊轧机基本组成及工作原理,阐述基于西门子TDC的立辊辊缝自动控制原理(AWC),重点介绍了立辊6个液压缸的同步以及短行程控制.     

1300钢板横切机组的设计和使用

本文介绍自选设计钢板横切机组的设备结构特点和使用调整要点。     

Steckel mill as a green steel strip and plate production technology

The Steckel mill,a long established solution for the economical production of relatively small volumes of hot rolled strip,has been rejuvenated in recent years by a range of new applications,boosted by the need of improving the energetic efficiency of the rolling process.The traditional advantages of the Steckel mill in terms of flexibility and reduced capital and operational costs are now enhanced by technological developments that have significantly expanded its application range into the combined production of strip and plate and improved the product quality.The increased awareness of the necessity of a sustainable growth in the steel industry has stimulated the development of process solutions with an improved efficiency in the use of natural resources,lower carbon emissions and increased yield.Modern Steckel mills are an adequate response to the trend towards low energy strip and plate production,in particular in their plate-Steckel mill variant.Siemens VAI have played a key role in the innovation and transformation of the Steckel mill concept,with a number of recent installations,presented in this paper from the point of view of their contribution to the development of greener steel rolling technologies.     

邯钢中厚板纵向变截面轧制的微跟踪模型及应用

邯郸钢铁集团有限责任公司3500 mm中厚板计算机控制系统由2级系统组成,在MAS轧制过程中采用了纵向变截面轧制的微跟踪模型。对轧件轧制长度进行计算机离散化处理,采用牛顿迭代法,建立纵向变截面轧制的微跟踪模型。利用西门子工艺和驱动自动化系统Simatic TDC和过程控制系统实现MAS轧制过程的微跟踪。实际应用表明微跟踪模型满足MAS的轧制要求。