共查询到17条相似文献,搜索用时 171 毫秒
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为了抑制或均匀武钢2250热轧带钢平整机在轧制服役过程中所表现出严重的W形工作辊磨损,降低磨损峰值,改善工作辊出现褶皱、光带等辊面缺陷,提高带钢的板形质量。根据现场轧制工艺条件及生产实际,通过建立热轧平整机工作辊的磨损预报模型,对工作辊的窜辊方式、窜辊步长和窜辊节奏等主要影响因素进行了研究,提出了改进的工作辊窜辊策略。通过现场试验发现,工作辊磨损峰值小于40μm,较改进前减小约20%;板形调控特性得到改善,弯辊力调节量较改进前减小约30%;降低了辊耗,延长轧辊服役时间,单位磨损量减小约20%。 相似文献
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涟钢1800CSP热轧平整机在生产中存在一些板形缺陷,用户反馈板形质量异议在5%以上。为了提高该机组的板形控制水平,减轻工作辊“W”形不均匀磨损对板形的影响,并提高单辊过钢量,针对热轧平整机工艺特点,本文以工作辊和支持辊间接触压力分布均匀化和前张力分布均匀化为目标,优化设计了新的工作辊及支持辊辊形。理论计算和现场应用表明,优化后新辊形使辊间接触压力分布趋于均匀,平整机工作辊“W”形磨损得到缓解,单辊过钢量与板形质量均显著提高。 相似文献
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《钢铁冶炼》2013,40(3):163-170
AbstractIn order to improve the flatness of hot rolled thin gauge steel strip, a new type of roll contour configuration was developed for a four-high temper rolling mill based on the finite element method analysis. The roll contour configuration consists of a variable contact back-up roll contour and a positive crown work roll contour. Both can be described as sixth order polynomial functions. The variable contact back-up roll not only reduces the roll stack deflection and contact stress concentration between work and back-up rolls, but also increases the control capability of the bending force of the work roll. Positive crown work roll contour is utilised to compensate roll wear and in turn the length of temper rolling schedule can be prolonged. After this roll contour configuration was applied on the temper rolling mill of Qiangang Company of Shougang Group, the flatness of hot rolled thin gauge strip was improved by 10% and the working efficiency was also increased as the length of temper rolling schedule was increased. 相似文献
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While it is acknowledged that roll wear is one of the most challenges to hot strip mills (HSM), very few studies which detail an exact prediction model have been published. The aim of this work is to evaluate and compare two prediction models with measured roll wear. The first prediction model, model 1, developed for a plate mill, was modified to use in strip rolling process. The second prediction model, model 2, is a simplified on‐line model. Data of two hot strip mills were used to investigate the influence of different rolling schedules. The rolls and strip properties were described and the rolling conditions were detailed. The influence of hot rolling factors, such as strip strength, roll grades, rolling temperature, rolling force, reduction and contact length, were also studied. When rolling with different work roll materials and strip grades, the modified prediction model has better prediction accuracy than the simplified model. The accuracy of both models becomes better at higher roll wear > 150 μm. HSS work rolls were confirmed to exhibit improvement of roll wear in comparison with HiCr rolls, the wear resistance was 3 to 4 times better. The influence of strip grade on roll wear was shown to be significant, with higher accuracy of the regression statistics for rolling with similar strip grades and lower regressed accuracy for rolling with mixed strip grades. The roll wear was evaluated at the centre of the barrel. 相似文献
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研究了国内某厂1700热连轧机CVC轧辊磨损模型,分析了影响轧辊磨损的各种因素。确定了模型中主要系数数值,编制离线仿真程序,计算某一换辊周期CVC工作辊磨损,得到轧制带钢长度与工作辊中心磨损的关系及CVC轧辊磨损曲线。计算结果表明,轧制带钢长度是影响轧辊中心磨损量的一个重要因素;CVC轧辊磨损规律与普通轧辊相同,轧辊磨损对其辊形影响不大。将计算得到的CVC轧辊磨损曲线与采用高精度磨床测量得到的实际磨损曲线比较,两者吻合较好,表明此轧辊磨损计算模型具有较高的计算精度,可用于轧辊磨损在线预报。 相似文献
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Three-Dimensional Model for Strip Hot Rolling 总被引:3,自引:0,他引:3
ZHANG Guo-min XIAO Hong WANG Chun-hua 《钢铁研究学报(英文版)》2006,13(1):23-26
Steel stripis widely usedin many fields such asautomobile ,building,transportation and householdappliance ,etc·. Withthei mprovement in productiv-ity and automation of strip processing,the require-ments for crown and flatness of strip have been in-creasingly severe ,and“crown free”steel strips arerequired for some special applications such as for au-tomobile parts andtinplate cans .In order toi mprovethe strip quality , an effective three-di mensionalmodel is needful to further study on the… 相似文献