菜单
  
    Abstract—Hot rolling products with improved quality features
    such as thickness profile, strip width, flatness, and material me-
    chanical properties, are in increasing demand. The project goal is
    to improve the production quality in an existing hot rolling mill at
    Aceralia Steel Company, Avilés, Spain. This paper describes the
    design and implementation of a supervisory system for real-time
    compensation of uneven thickness on both sides of a rolled strip.
    The design is based on a multivariable process model, whose pa-
    rameters are calculated online using measurement data from the
    mill. As a result, a computer system was developed that corrects
    the automatic gage control output from online acquired mill oper-
    ation data. Previously, this task was done manually and periodi-
    cally by a human operator.Manual correction is tedious and error
    prone, since it is based on visual inspection.Moreover, the proposed
    method leads to notorious improvement in the output strip quality,
    as the correcting signalmay be continuously applied before the un-
    even thickness effect is visible.6379
    Index Terms—Automatic gage control, hot rolling mill, multi-
    variable systems, system identification.I. INTRODUCTION
    THIS PAPER describes the design and implementation of a
    supervisory system for real-time compensation of uneven
    thickness on both sides of a rolled strip. The project goal is to
    improve an existing hot rolling mill at Aceralia Steel Company,
    Avilés, Spain [1]. The design is based on amultivariable process
    model, whose parameters are calculated online using measure-
    ment data from the mill.
    In a hot rolling mill the plate thickness is reduced, from an
    initial thickness of about 25 cm to a final thickness of 5 cm, by
    pulling the plate between two parallel rolls while moving the
    upper work roll; see Fig. 1. Thickness reduction is achieved in
    a series of passes. On each pass, a mechanical screw system
    adjusts the unloaded roll gap before threading the plate in the
    mill.
    While material is being fed, and in order to keep the output
    thickness within range, automatic gage control (AGC) systems
    are applied. AGC corrections are made by using hydraulic po-
    sitioning systems.
    Paper PID01–37, presented at the 2001 IndustryApplications SocietyAnnual
    Meeting, Chicago, IL, September 30–October 5, and approved for publication
    in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Metal Industry
    Committee of the IEEE Industry Applications Society. Manuscript submitted
    for review October 15, 2001 and released for publication December 14, 2001.
    J. C.Alvarez,A. B.Díez, andD.Alvarez arewith theDepartment of Electrical
    and Computer Engineering, University of Oviedo, 33204 Gijón, Spain (e-mail:
    juan@ieee.org; alberto@isa.uniovi.es; dalvarez@isa.uniovi.es).
    J. A. González and F. Obeso are with the Centro de Desarrollo, Aceralia Steel
    Company, 33480 Avilés, Spain (e-mail: jrodriguezg@aceralia.es; fobesoc@ac-
    eralia.es).
    Publisher Item Identifier S 0093-9994(02)02676-2.Fig. 2. Manual uneven thickness compensation: two identical hydraulic servo
    systems control the position on both sides of the upper roll pack, according to
    the AGC correction signal, and a human operator commands a tilting signal in
    order to compensate for the unevenness between north and south sides.
    Most operating AGCs in industry have been designed taking
    into consideration the mean value of the plate thickness on both
    sides. However, some factors may produce uneven thickness,
    such as flatwedge profiles. They lead to visible shape deviations
    in the rolling direction of the slab (for example, the camber or
    sweep defect), occasionally causing the clogging of the strip in
  1. 上一篇:布局优化模型为坚实地固化快速成型过程英文文献翻译
  2. 下一篇:计算机数字控制机床英文文献和中文翻译
  1. 汽车乘员舱的声振耦合英文文献和中文翻译

  2. 立体光照成型的注塑模具...

  3. 数控机床英文文献和中文翻译

  4. 工业机械手英文文献和中文翻译

  5. 低频振动的铁路车轴的状...

  6. 接头的形状对沥青塞接头...

  7. 数控加工技术英文文献和中文翻译

  8. java+mysql车辆管理系统的设计+源代码

  9. 乳业同业并购式全产业链...

  10. 电站锅炉暖风器设计任务书

  11. 大众媒体对公共政策制定的影响

  12. 杂拟谷盗体内共生菌沃尔...

  13. 当代大学生慈善意识研究+文献综述

  14. 中考体育项目与体育教学合理结合的研究

  15. 河岸冲刷和泥沙淤积的监测国内外研究现状

  16. 十二层带中心支撑钢结构...

  17. 酸性水汽提装置总汽提塔设计+CAD图纸

  

About

751论文网手机版...

主页:http://www.751com.cn

关闭返回