共查询到19条相似文献,搜索用时 125 毫秒
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通过对冷连轧机厚度控制AGC系统中常规方式与扩展方式的比较,剖析了扩展物流控制在冷连轧机高精度板厚控制中的应用,对不同模式厚度控制方式下的轧机生产实际进行了对照,并就轧制稳速、加减速、过焊缝情况下轧机实际厚度控制精度进行了分析,提出了相关冷连轧机高精度板厚控制的方案. 相似文献
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一、系统概况 冷连轧机计算机的应用要比热连轧机稍晚一些,原因是:(1)数字模型建立较困难;(2)各种控制系统不够成熟;(3)检测仪表存在一些问题。 从六十年代末期至七十年代以来,美国、日本和其它国家新建的冷连轧机大部分已经采用计算机控制。据不完全统计,到目前为止应用计算机的冷连轧机已达43台,详见表1。 按计算机在冷连轧机生产过程自动化和生产管理自动化两个方面来看,大致可分为 相似文献
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1 前言三年前就已讨论过酸冼线和冷连轧机的连续操作(或连接操作),其中包括带钢转向装置和带钢储存器等新颖设备的设计。下面是此技术改造的事例: (1) 连续酸洗线和冷连轧机:法国索拉克公司的蒙塔泰尔(改造)和圣·阿加特(新建)。 (2) 连续冷轧生产线:比利时考克里尔公司蒂莱尔(改造)。在这三套设备中,两套是酸洗线与冷连轧机的连续操作,一套是由普通冷连轧机改造为连续冷轧生产线。自那之后,克里西蒙公司将第二套冷连轧机改造成连续操作,这是意大利马果纳公司皮昂比诺的1371.6mm四机架冷连轧机,为全连续操作改造的设备于1990年9月投产。表1列出了以上四套轧机的主要特性。 相似文献
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It is a complicated problem for cold-rolled strip to improve asymmetric strip shape in strip production. A roll system and strip coupled model of six-high cold rolling mill was established with finite element method to estimate the effect of intermediate roll shifting, tilting, symmetric and asymmetric bending technologies on strip profile. To reduce asymmetric defects of strip shape as much as possible, some control strategies were proposed, including tilting and asymmetric bending of intermediate roll and work roll. The combinations of these three control strategies can effectively eliminate asymmetric strip shape defects. Finally, the closed-loop control model of asymmetric flatness at the last stand was given, and the flatness control system with the function of asymmetric strip shape control was also designed for cold tandem mill. 相似文献
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The general cold rolling mill cannot dynamical display and quantitative control the section properties of strip due to lack of profile gaugemeter. To this problem, through a large number of field trials and theoretical studies, taking the general four-roll cold rolling unit as research object, comprehensive considered the equipment and process characteristics in tandem cold rolling process, based on the strip thickness distribution mechanism model of tandem cold rolling, a whole set of design method for the virtual profile gaugemeter and the feedback control technology for section properties was put forward. It make full use of incoming materia??s section configuration data which come from the profile gaugemeter of hot rolling unit, and the real-time rolling process parameters, such as rolling force, tension, roll bending force and roll tilt amount, which come from the level 1 of tandem cold rolling unit. It can not only dynamical display the section configuration of cold rolled product and dynamic forecast the wedge quantity and plate crown, but also feedback control the section properties of strip. The section quality of cold rolled steel strip product was greatly improved. This technology should be used widely. 相似文献
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在酸洗机组和冷连轧机组上,闪光对焊作为一种有效的焊接方法得到了较为广泛的应用。宝钢1 220 mm轧机应用三菱公司NMW-C750F闪光焊机对轧钢坯料带钢前后端部采用闪光对焊工艺焊接。从来料、设备、工艺等方面详细分析了影响闪光对焊焊缝质量的因素,并根据冷连轧机组现场实际情况制定了一系列焊接工艺调整、备件周期维护等措施,有效地提高了轧钢中闪光对焊的焊接质量和可靠性,保证了1 220 mm轧机的正常运行。 相似文献