【作者】 李涛；

【导师】 白振华；

【作者基本信息】 燕山大学 ， 机械设计及理论， 2015， 硕士

【摘要】 近年来,随着大部分板带用户由低端转向高端,对带钢的板形质量也相应的提出了越来越高的要求。为了满足用户的需求,提高产品的板形质量,各钢铁企业纷纷在轧机的出口配置板形仪,对带材的板形进行闭环控制。与此同时,受投资成本、设备空间等主客观条件的限制,目前还有较大一部分轧机出口没有配置板形仪,无法实现板形闭环控制。这样,提出了一套虚拟板形仪的设计技术,开发出了相应的板形分析与闭环控制系统,在不配置实体板形仪的前提下实现了板形的动态可视化显示与闭环控制,以某1420四辊平整机组为研究对象,对四辊平整机组中出现的复杂浪形进行了深入的研究。主要研究内容如下所示:首先,在普通四辊平整机组板形模型的基础上,充分考虑了四辊平整机组的设备参数和工艺特点,提出了一套采用非对称式结构来替代对称性结构,将板形控制手段从传统的对称弯辊(对称窜辊)、倾辊等二维增加到左弯辊、右弯辊、上窜辊、下窜辊以及倾辊等五维的板形控制思想,并在此基础上以实际板形与目标板形的差值最小为目标建立了一套适合于四辊平整机组的复杂浪形控制技术,编制了相应的板形模拟软件,为板形缺陷的治理垒实了基础;随后,考虑了平整机组由于压下量小、变形热与摩擦热少、轧辊热凸度不大而无法采用精细冷却的方式控制,从而产生中双组合浪、单肋浪、多肋浪、中肋组合浪、边肋组合浪等复杂浪形缺陷,结合某1420四辊平整机组进行了板形优化,有效地提高了板形质量;最后,将四辊平整机组复杂浪形的控制及虚拟板形仪的设计技术在某1420机组上进行了模拟,效果良好,弥补了平整机组因无法采用精细冷却而带来的板形控制先天性不足问题,为现场平整机组板形精细控制提供了一套新方法,具有进一步推广使用的价值。更多还原

【Abstract】 With the most strip-users from low-end to high-end, more and more requirements are accordingly put forward for the plate shape quality of strip. In order to meet the needs of users and improve the shape quality of products, the iron and steel enterprises have the shape meter in the export configuration of plate mill, for the closed-loop control of the strip flatness.At the same time, by control of the investment costs, equipment space, the main objective conditions, there are a large part of mills outlet is not configured to shape meter, which can not achieve the closed-loop control of flatness. In this way, a set of virtual design technology of shape meter was put forward and developed the analysis of strip shape and the closed loop control system accordingly, without the configuration entity shape meter realizes the dynamic visual shape display and closed loop control.selecting a 1420 4-high temper mill as the research object, the thorough research is conducted on two kinds of parameters influencing shape: tempering lubricant parameters and shape parameters. The main content of the research demonstrate as follows:Firstly, Take 4-high temper mill as research object, present a set of asymmetrical structure to replace symmetrical structure, increase strip shape control method from traditional 2-dimensional symmetric roll bending(symmetric roll shifting) and roll tilting to 5-dimensional left roll bending, right roll bending, upper roll shifting, bottom roll shifting and roll tilting. On this foundation, build a set of suitable complex wave control technology for 4-high temper mill with actual strip shape and target strip shape difference minimum as the target, through strip shape control parameters left roll bending, right roll bending, upper roll shifting, bottom roll shifting and roll tilting optimization setting, effectively solve the problems of control defect on 4-high temper mill complex wave.Secondly, In allusion to small reduction, less deformation and friction heat and small roll thermal crown of temper mill, multi-zone cooling is incapable of controlling complex wave defects such as center and double edge composite wave, single rib wave, multi rib wave, center and rib composite wave, edge and rib composite wave.Shape optimization are combined with a 1420 four roller leveling unit, effectively improving the quality of strip shape.Finally, The four roller leveling unit complex design technology to control the wave shape and virtual shape meter in a 1420 unit is simulated, the effect is good,make up for the congenital lack of shape control on temper mill which is incapable of using fine control,it provides a set of new method for strip shape fine control on field temper mill, with further popularization and application value.更多还原