共查询到18条相似文献,搜索用时 140 毫秒
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炼钢-连铸-热轧生产计划编制是一个多目标、多约束的复杂组合优化问题。从有利于多工序生产组织的角度,提出了一种可分工序独立编制工序计划,并且按铸轧衔接关系进行系统协调的一体化生产计划编制方法。即首先以铸坯作为热轧与炼钢-连铸不同工序生产阶段统一的生产计划对象,并将炼钢、连铸与热轧的生产目标和约束进行归类抽象,使得炼钢炉次计划、连铸浇次计划和热轧单元计划的制定模型具有内在的逻辑相关性;以缩小铸轧时间差作为铸轧界面衔接关系的协调控制目标,来优化连铸与热轧之间的生产衔接,进而获得一体化生产计划。采用某钢厂的生产订单数据和生产计划目标、约束条件,通过模型仿真计算与生产实绩数据的对比检验了该一体化生产计划编制方法的有效性。 相似文献
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进行冶炼-连铸-热轧一体化计划问题编制,必须对炼钢、连铸、热轧三个阶段的生产约束因素进行系统分析.作者根据在建立、实施热轧MES系统计划管理模块时的心得,对设计计划管理模块分阶段进行了业务分析,对同类型企业进行一体化计划编制或对MES系统计划模块的规划有一定参考作用. 相似文献
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钢铁企业生产的过程中,炼钢-精炼-连铸生产发挥着重要的作用.钢水需经过多个生产环节的处理,包括电弧炉、精炼设备等,在各个炉次生产的过程中,要确保协调性和连续性.简单来说,在炼钢-精炼-连铸生产的过程中,需要控制成本、保障质量,所以要对调度方法进行优化,文章就此进行了相关的阐述和分析. 相似文献
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针对高强度带钢表面粗糙度的特殊要求和控制难题,采取批量工业生产实验和数理统计的方法,研究高强度带钢表面粗糙度的轧制转印及变化规律,以及轧机工作辊表面粗糙度的变化规律.确定了高强度带钢表面微观形貌由末机架决定,分别建立了高强度带钢表面粗糙度预测模型、轧制转印率模型和轧机工作辊表面粗糙度预测模型.比较了高强度带钢与普通强度带钢的轧制转印行为.研究结果可用于工业生产过程中预测高强度带钢表面粗糙度,合理安排冷轧轧制顺序和轧制计划,以及预测确定工作辊上下机时间节点. 相似文献
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从实际问题从发,研究连铸和热轧两阶段集成生产的库存与生产计划优化问题。根据顾客对板坯和钢卷的订货情况,考虑连铸机和热轧机的生产能力约束及板坯库和热轧卷库的库容约束,针对板坯的外卖量和作为热轧机原料量之间的协调及板坯与热轧卷之间的匹配情况,同时考虑板坯库和热轧卷库的库存成本以及对板坯和钢卷的订货需求可以延迟满足,但需支付惩罚费用等特点,以利润最大为目标函数,建立了相应的线性规划模型。通过大量的数值测试,验证了模型的有效性。 相似文献
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《Baosteel Technical Research》2010,(Z1):96
To establish the rolling plan of cold-rolling flattening set is very complicated,it is restrained by several constraints of rolling schedule.Operator’s subjective and other human factors also affect the rationality of plan arrangement seriously.Its result causes many abuses such as overusing transition strip,high-frequent roller switching,no-fully utilization of rollers,low arrangement rate of the plan.Therefore,we have initially developed a practical optimization model of rolling plan and schedule,which could be established and optimized by computer automatically,and a dynamic alignment module which have friendly UI according to the experience of operators.They have greatly enhanced the system usability.This system takes full advantage of relationship between the roller roughness and the rolling weight,reasonably arranges rolling based on different roughness demand,effectively enhances the use factor of roller and the smooth quality of steel string coil. A practical and effective scheduling optimization algorithm and rolling scheduling optimization applications system was developed based on the study of mixed hot rolling scheduling optimization model of carbon steel,stainless steel,stainless steel and carbon steel cross-rolling.The online application indicates that the model and algorithm is designed reasonable,practical and effective.This model system can significantly improve the scheduling efficiency and quality and it’s also very positive in reducing heating energy consumption,enhancing the volume of units rolling plan,and optimizing the production of hot-rolled unit organization and planning and scheduling. 相似文献
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回顾了“九五”期间山东省轧钢生产技术的发展进步 ,针对存在的问题和技术发展趋势 ,提出“十五”期间山东省轧钢生产技术的发展重点是 :提高装备水平和产品档次 ;采用新技术 ,降低生产成本 相似文献
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在热轧限产期间,酸洗板的生产组织模式发生变化,供料能力与热轧计划编制以及酸洗板钢种规格分布紧密相关.针对热轧酸洗板计划进行优化与拓展,同时对酸洗板订货合同的薄料比进行推荐,在热轧限产情况下确保了酸洗板机组的稳定生产. 相似文献
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Dongsheng Liu Qingliang Li Toshihiko Emi 《Metallurgical and Materials Transactions A》2011,42(5):1349-1361
Key parameters for a thermomechanically controlled processing and accelerated cooling process (TMCP-AcC) were determined for
integrated mass production to produce extra high-yield-strength microalloyed low carbon SiMnCrNiCu steel plates for offshore
structure and bulk shipbuilding. Confocal scanning microscopy was used to make in-situ observations on the austenite grain growth during reheating. A Gleeble 3800 thermomechanical simulator was employed to investigate
the flow stress behavior, static recrystallization (SRX) of austenite, and decomposition behavior of the TMCP conditioned
austenite during continuous cooling. The Kocks–Mecking model was employed to describe the constitutive behavior, while the
Johnson–Mehl–Avrami–Kolmogorov (JMAK) approach was used to predict the SRX kinetics. The effects of hot rolling schedule and
AcC on microstructure and properties were investigated by test-scale rolling trials. The bridging between the laboratory observations
and the process parameter determination to optimize the mass production was made by integrated industrial production trials
on a set of a 5-m heavy plate mill equipped with an accelerated cooling system. Successful production of 60- and 50-mm-thick
plates with yield strength in excess of 460 MPa and excellent toughness at low temperature (213 K (–60 °C)) in the parent
metal and the simulated coarse-grained heat affected zone (CGHAZ) provides a useful integrated database for developing advanced
high-strength steel plates via TMCP-AcC. 相似文献