基于图像处理的冷轧薄板板形识别

为了解决冷轧薄板板形识别问题，采用基于图像处理的方法，对图像进行直方图均衡化，使处理后的图像对比度、图像边界的清晰度有了很大的提高，并在此基础上再进行形态学增强，改善图像效果.对于处理后的图像利用canny算子提取其边缘，利用图像的均值、方差和对比度的统计特征作为BP神经网络分类器的输入进行缺陷特征分类.根据上述方法进行了板形识别系统的硬件、软件设计，实际应用表明，该方法可以有效地识别出常见的板形缺陷.     

一种板形检测值处理方法的开发及应用

介绍了一种用于接触式分段板形仪的板形检测信号处理方法及处理流程．用该方法处理板形检测信号不需要计算带钢在板形仪上形成的包角．该法编制成程序后,作为一个模块被应用在一台可逆冷轧机的板形控制系统中．轧机投入运行后,生产稳定,并取得了良好的板形控制效果,平均板形偏差控制在5I以下,表明该方法是稳定、有效的,可以用于工业生产．     

冷轧带钢板形缺陷及连续拉弯矫直方式

主要对冷轧带钢板形进行常规简述,对冷轧带钢生产中常见的板形问题及其出现的原因进行简单分析,并重点介绍目前解决冷轧带钢板形问题的常用矫直方式。     

森吉米尔轧机的板形控制

结合武钢硅钢生产实际，从现场检测分析入手，寻找实际轧制过程中森吉米尔轧机的扳形变化规律，建立了多辊系弹性变形仿真模型。通过对各种条件下辊系变形规律的分析，揭示了森吉米尔轧机的板形控制特性.     

万能冷轧宽带钢平直度分析及控制系统

该系统详细考虑了弯辊、串辊、分段冷却以及辊型曲线等对冷轧宽带钢平直度的影响，并建立了完整的板形控制理论体系。该系统能对四辊以及六辊轧机系统的板形控制提供详细而综合的分析，并为平直度控制进行工艺参数预设定分析。     

板带轧机板形检测设备系统误差综合补偿技术的开发

充分考虑板带轧机板形检测设备的结构与工艺特点,经过大量的现场试验与理论研究,将经典力学理论与现代计算技术有机结合,首次建立了一套适合于板带轧机板形检测设备系统误差分析模型,给出了相应的误差综合补偿方案,并将其应用到生产实践,对不同张力下检测辊的挠曲、倾斜、磨损等因素进行了综合补偿,大大降低了现场的板形封锁率,给企业取得了较大的经济效益,具有进一步推广应用的价值。     

非接触型板形仪Si—flat的测量原理及应用

板形仪是冷轧生产线上的重要设备,其工作效果对带钢表面质量有很大影响。目前冷轧线上使用的板形仪多为接触式,其使用有一定的缺陷。Si—flat板形仪克服了这些缺陷。并能达到测量要求。对Si—flat板形仪结构和测量过程进行了描述,并对其关键的元件进行了详细的讨论,突出Si—flat板形仪测量的特点。     

拉矫机改善带钢板形的研究

对拉伸弯曲矫直机改善带钢板形的机理进行了系统的研究及总结,并据此就拉矫机工艺参数对板形的影响及控制进行了说明.     

X射线衍射法测量冷轧带钢残余应力

残余应力的不均匀分布是影响板形的根本原因。为了深入了解冷轧带钢残余应力的分布情况,文章采用X射线衍射法对在不同轧制条件下冷轧后带钢的残余应力进行了测量分析,研究了残余应力沿板厚方向的变化、张力对残余应力分布的影响以及残余应力与板形的关系。研究的结论对制定与完善板带轧制规程、提高板形质量具有重要意义。     

Dynamic characteristics of cold rolling mill and strip based on flatness and thickness control in rolling process简

The dynamic model of cold rolling mill based on strip flatness and thickness integrated control was proposed,containing the following sub-models：the rolling process model,the dynamic model of rolls along axial direction,and the compensation model.Based on the rule of volume flow rate,the dynamic rolling process model was built.The work roll and backup roll were taken as elastic continuous bodies,the effect of shear and moment of inertia were taken into consideration,and then the dynamic model of rolls was built.The two models were coupled together,and the dynamic model of rolling mill was built.In the dynamic model,the thermal expansion of the rolls,the wear of the rolls and other related parameters can not be considered.In order to compensate the dynamic model,the coupled static model of rolls and strip was applied.Then,according to the inner relationship of these models,the dynamic model and the compensation model were coupled,and the dynamic model of rolling mill based on the strip flatness and thickness integrated control was built.The dynamic simulation of the rolling process was made,and the dynamic thickness and the dynamic flatness information were obtained.This model not only provides a theory basis for the virtual rolling,but also provides a platform for the application of advanced control theory.     

Industrial shape detecting system of cold rolling strip

A high-precision shape detecting system of cold rolling strip is developed to meet industrial application, which mainly consists of the shape detecting roller, the collecting ring, the digital signal processing (DSP) shape signal processing board and the shape control model. Based on the shape detecting principle, the shape detecting roller is designed with a new integral structure for improving the precision of shape detecting and avoiding scratching strip surface. Based on the DSP technology, the DSP shape signal processing circuit board is designed and embedded in the shape detecting system for the reliability and stability of shape signal processing. The shape detecting system was successfully used in Angang 1 250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting is 0.2 I and the shape deviation is controlled within 6 I after the close loop shape control is input.     

纳米添加剂对板带钢冷轧乳化液润滑性能的影响

通过四球摩擦学试验分析纳米添加剂对板带钢冷轧乳化液摩擦学性能的影响;在不同润滑条件下进行冷轧试验,分析纳米添加剂对冷轧过程和轧后带钢表面质量的影响。结果表明,含纳米添加剂的轧制乳化液与传统轧制乳化液相比,其承载能力和抗磨减摩性能均有所改善;带钢冷轧过程中采用含纳米添加剂的轧制乳化液进行润滑,可有效降低轧制压力和轧机功率、减少能耗,并且轧后带钢表面质量也有明显改观。     

Improvement on strip flatness of cold temper mills by modifying roll contour shape

A study on roll gap profile (strip profile) control was accomplished in a 1700 mm single-stand temper mill. Some critical problems such as the deviation of work roll contour caused by grinding and wear, the effectiveness of work roll bending were discussed. Using a finite element model, the effects of roll contours (ground and wear) on strip profile were investigated. The roll bending effect on strip thickness was also analyzed. It is pointed out that there are some special features of flatness control in the temper mill: during temper rolling, roll deformation is slight due to small rolling load, and the loaded roll gap profile mainly depends on work roll contour, while the backup roll has a little effect on gap crown; the effect of bending force on gauge can not be ignored due to the coupling between flatness control and gauge control. A new roll contour arrangement adaptable to the mill was presented and has been put into practical production. The application of the new set of rolls showed some good results: larger crown control range of work roll bender, higher rolling stability, better strip profile and flatness quality.     

VCR and ASR technology for profile and flatness control in hot strip mills

The roll contour pattern and variety of work and backup rolls in service and its effect on profile and flatness control performance in 1 700 mm hot strip mill at Wuhan Iron and Steel （Group） Corporation were tested and analyzed by the developed finite element models of different typical roll contours configurations. A rather smooth local work roll contour near strip edges and an increase in rolled length can be obtained by application of long stroke work roll shifting system with conventional work roll contours that is incapable of the crown control. In comparison with the conventional backup and work roll contours configuration, the crown control range by the roll bending force enhances by 12.79% and the roll gap stiffness increases by 25.26% with the developed asymmetry self-compensating work rolls（ASR） and varying contact backup rolls（VCR）. A better strip profile and flatness quality, an increase in coil numbers within the rolling campaign and a significant alleviated effect of severe work roll wear contours on performance of edge drop control are achieved by the application of ASR with crown control and wear control ability in downstream stand F5 and VCR in all stands of 1 700 mm hot strip mill.     

Analysis of the cause of crack in cold rolling of QSn6.5-0.1 strip

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基于板形性能优化目标的支承辊辊形设计

研究了宽板带轧机辊形设计的原理和方法,提出了一种基于板形性能优化目标的支承辊辊形设计理念,并在某冷轧机组应用所设计的辊形,改善了支承辊磨损,提高了轧机的板形控制能力.     

板形控制技术探讨

介绍带钢板形控制技术，比较其特点及应用情况，总结板形控制技术及理论成果；展望板形控制技术的发展方向，为进一步促进该技术的研究提供参考。     

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.