粗轧板坯镰刀弯生成规律仿真研究

发布时间：2018-03-30 22:22

本文选题：粗轧　切入点：板坯　出处：《塑性工程学报》2016年06期

【摘要】：针对某常规热连轧粗轧板坯的镰刀弯问题,通过对某2 250mm热连轧粗轧机板坯镰刀弯现象进行分析,采用有限元软件ABAQUS,建立了轧辊-轧件动态热力耦合有限元模型,考虑粗轧轧制过程中的非对称影响因素,系统研究了来料楔形、来料两侧温度不均以及轧机两侧纵向刚度不同因素影响下的板坯镰刀弯的产生机理,从而得到了出口板坯镰刀弯生成规律,建立了出口板坯镰刀弯弯曲量计算公式。将该式计算结果与有限元计算结果对比可知,偏差绝对值基本在15%以内,表明该式能够比较准确地计算镰刀弯弯曲量。同时,定量表达了入、出口板坯楔形和镰刀弯弯曲量之间的关系。即已知入口板坯楔形和出口镰刀弯弯曲量,利用该式,则可计算出口板坯楔形,从而计算出辊缝倾斜调整值。
[Abstract]:Aiming at the problem of sickle bending of rough-rolled slab in a conventional hot continuous rolling mill, the dynamic thermal-mechanical coupling finite element model of roll and workpiece is established by analyzing the scythe bending phenomenon of slab in a 2 250mm hot strip mill and using the finite element software Abaqus. Considering the asymmetric influence factors in rough rolling process, the mechanism of slab sickle bending under the influence of wedge shape, uneven temperature on both sides of feed and different longitudinal stiffness on both sides of rolling mill is studied systematically. In this way, the forming law of the sickle bending of the outlet slab is obtained, and the calculation formula of the bending quantity of the outlet sickle is established. By comparing the calculated results with the results of the finite element calculation, the absolute deviation is within 15%. It is shown that the formula can calculate the bending quantity of sickle accurately. At the same time, the relation between wedge shape of inputting, outlet slab and bending quantity of sickle is expressed quantitatively. That is, the wedge of inlet slab and the amount of bending of sickle at outlet are known, and the formula is used. The wedge shape of the outlet slab can be calculated, and the roll slant adjustment value can be calculated.
【作者单位】：北京首钢自动化信息技术有限公司自动化研究所;北京科技大学国家板带生产先进装备工程技术研究中心;
【基金】：国家“十二五”科技支撑计划”精密带钢产品质量优化与关键装备研发“(2015BAF30B01) 国家自然科学基金资助项目(51304017)
【分类号】：TG335.5

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