共查询到20条相似文献,搜索用时 78 毫秒
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3800mm中厚板轧机平面形状控制功能的应用 总被引:1,自引:0,他引:1
对平面形状控制理论模型进行了简化,并将厚度变化区间内厚度变化量与长度简化成线性关系;确定平面形状控制参数,并检查修正了极限值。利用自主开发的2级计算机控制系统在新钢3800mm中厚板轧机上实现了平面形状控制功能,获得了较好的控制效果。 相似文献
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中厚板平面形状控制途径探讨 总被引:1,自引:0,他引:1
本文通过现场工艺参数的相关分析及人工神经网络技术的应用 ,对影响平面形状的因素进行了定量分析 ,从而实现计算机选料和立轧规程优化 ,获得平面形状最佳的效果。 相似文献
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从技术内容、设备以及技术实现方法等方面论述了中厚板轧机压下控制技术和压下控制系统的应用,并指出当前的问题是应该重视压下控制技术的工程应用水平。 相似文献
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Algorithm to optimise the edging amount for high accuracy plan view control has been developed to improve plate yield. To produce rectangular shape of rolled plate, the edging amount that can minimise the crop length and width deviation must be determined from the operational analysis of plate mill. For the plan view control, new mathematical models to predict crop length at the top and bottom ends and width deviation at side ends are developed on the basis of statistics and back propagation learning algorithm of neural network. Using new mathematical models, under given rolling conditions of broadside and finishing pass and the permissible tolerance in width deviation, optimised algorithm which can achieve high accuracy plan view pattern is proposed. The application of newly developed algorithm in actual plate mill for plan view pattern control reduced width deviation by 20%, and crop length by 30% on average with a suitable fishtail crop shape. 相似文献
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《钢铁冶炼》2013,40(9):656-664
AbstractOn the basis of Shagang Group’s 5000 mm heavy plate mills, conventional rolling processes with different broadside rolling ratios were simulated by the three-dimensional rigid plastic thermomechanical finite element (FE) model developed in the author’s previous work. By analysing the simulation results, it was found that the final plate plan view patterns after hot rolling processes were bound closely to the broadside rolling ratio and the finishing rolling ratio. Then, predictive models for plate end edge shapes and side edge shapes were formulated by nonlinear regressive analysis of the simulation results and modified by the lengths of the uneven shapes for higher accuracy. The validity of the prediction models was confirmed by comparing the predicted concavity and convexity lengths with those measured from industrial tests. The predicted plate edge shapes were in good agreement with those of the FE simulation. On the basis of the plate plan view pattern prediction models, methods to improve the plate plan view pattern are discussed. 相似文献
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This paper describes the benefits,technical difficulties and disadvantages of the current heavy reduction solutions for plate production.For updated plate mills,this paper gives a better idea for the heavy reduction control in the rolling process.That is to keep the reduction amount constant in the front-end and back-end sections of the plate and to adopt tapered rolling with variable reduction in the middle section of the plate.This solution (already applied for a patent) can not only fully utilize the capacity of the mill motors,but also prevent difficulties in plate biting caused by the conventional heavy reduction solutions with excessive draft.This technical solution has been implemented at the 5 m plate mill plant of Baosteel,and industrial tests have proved the feasibility of it.This paper presents and analyzes the industrial test data and proves that the tapered heavy reduction technology can reduce the number of rolling passes.In addition,this paper looks forward to the future research in this area. 相似文献
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WANG Quansheng) MIAO Yuchuan) GU Hua) ) Research Institute Baoshan Iron & Steel Co. Ltd. 《Baosteel Technical Research》2010,(Z1)
Sometimes main driver motors' torque exceeds the maximum limit in Baosteel's 5 m heavy plate mill. Experience showed that torque overloaded occurred in cases of some special rolling sequence and special rolling plate dimension.Most of the overloaded occurred only instantaneous at some time point during the rolling pass, which especially easily happened at the bite and motor acceleration time after the bite.This paper analyzes the impact factors for motor torque overload and carefully studies the key deta... 相似文献
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《Baosteel Technical Research》2010,(Z1):106
The Steckel mill,a long established solution for the economical production of relatively small volumes of hot rolled strip,has been rejuvenated in recent years by a range of new applications,boosted by the need of improving the energetic efficiency of the rolling process.The traditional advantages of the Steckel mill in terms of flexibility and reduced capital and operational costs are now enhanced by technological developments that have significantly expanded its application range into the combined production of strip and plate and improved the product quality.The increased awareness of the necessity of a sustainable growth in the steel industry has stimulated the development of process solutions with an improved efficiency in the use of natural resources,lower carbon emissions and increased yield.Modern Steckel mills are an adequate response to the trend towards low energy strip and plate production,in particular in their plate-Steckel mill variant.Siemens VAI have played a key role in the innovation and transformation of the Steckel mill concept,with a number of recent installations,presented in this paper from the point of view of their contribution to the development of greener steel rolling technologies. 相似文献