干平整中工作辊与带钢表面粗糙度对摩擦系数影响的研究

针对干平整轧制过程中工作辊与带钢表面粗糙度对摩擦系数的影响仅能定性分析、不能满足生产需要的问题,经过大量的现场试验与理论研究,充分结合平整机组的设备与工艺特点,基于粗糙度的基本理论,根据干平整轧制过程中摩擦特点构造了反映工作辊及带钢表面粗糙度与摩擦系数之间一一对应关系的数学模型,提出了相应的模型计算策略,并将其应用到宝钢冷轧薄板厂1 220平整机组的生产实践,定量分析了工作辊及带钢表面粗糙度对摩擦系数的影响,有效地提高了轧制压力的预报精度与产品质量,取得了良好的使用效果,具有进一步推广应用价值。     

板带轧机轧制规程计算机仿真

编制了轧制规程计算程序，该程序模拟了在冷轧条件下的整个轧制过程，包括单位变形能数学模型、张力数学模型、轧辊压扁系数数学模型、速度影响系数数学模型、变形效率数学模型等。根据极限条件，计算出入口厚度、出口厚度、轧制速度、张力、轧制力、轧制力矩等。     

CAPL炉内带钢张力分布研究

本文对ＣＡＰＬ炉内带钢张力分布的有关模型进行了综合，建立了张力递推公式，并对有关变量作了量化处理。提出了两种张力分布计算法，并编程计算了不同规格带钢的张力分布。此外还对张力模式作了讨论，为炉内带钢张力分布的修正提供了可靠依据。     

板带热连轧轧制变形规程的模糊多目标优化设计

研究了目前板带热连轧轧制变形规程设计方法及在该领域中的应用状况，分析并建立了以能耗最低、负荷分配最均衡及板形质量最优的多目标优化模型，并运用模糊学的理论和方法对板带热连轧轧制变形规程多目标优化问题进行了求解．最后以某六机架热连轧机为例，对常规轧制，各单目标优化轧制以及模糊多目标优化轧制的轧制变形规程进行了分析比较，结果表明了该方法的有效性．     

带钢张力ARMA时序模型的时域特性分析

在文献（１）的基础上，运用随机过程理论，进一步讨论了带钢张力ＡＲＭＡ时序模型的三种主要时域特性；描述系统动态特性的Ｇｒｅｅｎ函数。描述随机数字序列统计特性的自协方差函数和偏相关函数，从不同的角度揭示了ＡＲＭＡ时序模型所表征的带钢张力系统的动态特性，为带钢张力ＡＲＭＡ时序模型的识别与参数估计奠定了基础。     

非对称轧制力能参数与带钢张应力分布规律

为深入了解带钢轧制过程中非对称因素对轧制力能参数与带钢张应力分布的影响,应用ABAQUS非线性有限元软件对轧制过程进行二维建模及仿真分析,以轧辊驱动方式非对称、上下工作辊与带钢间接触摩擦润滑条件非对称以及存在异步轧制等3种非对称因素作为研究对象,计算并分析上述非对称因素及其程度对于轧后带钢内部张应力分布、轧制力以及轧制扭矩的影响规律,进而定量分析与比较3种非对称轧制因素对于轧制过程中的力能参数和厚向张应力分布规律的影响程度. 仿真计算表明：3种非对称轧制状态都会导致轧后带钢厚向张应力分布的不对称;3种非对称轧制状态都会明显改变轧制过程力能参数大小;与相应对称轧制状态相比,有些非对称因素可以不同程度地降低轧制力和轧制扭矩. 轧制过程中的非对称因素从不同的角度来分析,是利弊共存的.     

窄带钢异步冷轧轧辊热凸度及带钢同板差应用研究

本文就窄带钢异步冷轧时的轧辊热凸度及各力能参数对带钢横向厚度分布(同板差)的影响进行了生产现场综合测试,并结合轧辊热变形及辊系变形理论,用有限差分法和影响函数法作了相应的计算分析,计算结果与现场实测值基本吻合。从而为将异步轧制工艺应用于冷轧窄带钢生产提供了完整的实测数据资料和实用工程计算软件。     

宽厚复合板热轧成形轧制力模型

为了有效提高宽厚复合板热轧成形质量,以不锈钢与低合金钢层状复合结构材料为研究对象,针对宽厚复合板结构复合及加工协同变形的技术要求,制定宽厚复合板热轧成形工艺路线,并对热轧宽厚不锈钢复合板成形轧制力模型进行研究.将热轧复合变形区分成Ⅰ、Ⅱ两个区段,并依据热轧过程中轧制区间内金属流动变形规律,确定各界面上摩擦切应力τ的方向,进而推导出热轧不锈钢复合板成形轧制力计算公式.研究结果表明:该轧制力模型可准确预测轧制力的大小,有效提高轧制力的计算精度.经轧制成形制造的不锈钢复合板满足设计技术要求,制定工艺路线合理,可用以指导生产实践.     

轧制过程轧制压力模型的研究

轧制压力的大小,除了与钢种的变形抗力有关之外,还与变形时的受力方式、轧件形状尺寸和摩擦条件有关。结合冷轧机的轧制特点和轧制原理采用直线逼近法建立总轧制压力模型,并确定中性角和轧制力的位置,从而定性分析各因素对轧制力的影响,并为定量分析轧制力及电机负荷奠定基础。     

热带钢粗轧立辊调宽轧制过程变形研究及应用

针对工业现场热带钢轧机粗轧段立辊侧压调宽轧制的工艺特点,利用ANSYS／LS—DYNA建立了精确的立辊-水平辊三维轧制有限元仿真模型,模拟计算了不同工艺条件下轧件的变形,重点分析了横截面形状（“狗骨形”）变形特点和宽展变形特点,所建模型及计算结果已应用于粗轧段自动宽度控制（AWC）程序预设定值,应用效果良好。     

Improvement on strip flatness of cold temper mills by modifying roll contour shape

A study on roll gap profile (strip profile) control was accomplished in a 1700 mm single-stand temper mill. Some critical problems such as the deviation of work roll contour caused by grinding and wear, the effectiveness of work roll bending were discussed. Using a finite element model, the effects of roll contours (ground and wear) on strip profile were investigated. The roll bending effect on strip thickness was also analyzed. It is pointed out that there are some special features of flatness control in the temper mill: during temper rolling, roll deformation is slight due to small rolling load, and the loaded roll gap profile mainly depends on work roll contour, while the backup roll has a little effect on gap crown; the effect of bending force on gauge can not be ignored due to the coupling between flatness control and gauge control. A new roll contour arrangement adaptable to the mill was presented and has been put into practical production. The application of the new set of rolls showed some good results: larger crown control range of work roll bender, higher rolling stability, better strip profile and flatness quality.     

Preset model of bending force for 6-high reversing cold rolling mill based on genetic algorithm

The hydraulic roll-bending device was studied, which was widely used in modern cold rolling mills to regulate the strip flatness. The loaded roll gap crown mathematic model and the strip crown mathematic model of the reversing cold rolling process were established, and the deformation model of roll stack system of the 6-high 1 250 mm high crown (HC) reversing cold rolling mill was built by slit beam method. The simulation results show that, the quadratic component of strip crown decreases nearly linearly with the increase of the work roll bending force, when the shifting value of intermediate roll is determined by the rolling process. From the first pass to the fifth pass of reversing rolling process, the crown controllability of bending force is gradually weakened. Base on analyzing the relationship among the main factors associated with roll-bending force in reversing multi-pass rolling, such as strip width and rolling force, a preset mathematic model of bending force is developed by genetic algorithm. The simulation data demonstrate that the relative deviation of flatness criterions in each rolling pass is improved significantly and the mean relative deviation of all five passes is decreased from 25.1% to 1.7%. The model can keep good shape in multi-pass reversing cold rolling process with the high prediction accuracy and can be used to guide the production process.     

用边界单元法分析张力在轧制中的作用

建立了弹塑性问题的边界元方法,并用此方法模拟了冷轧板带三维轧制过程,讨论了改变前、后张力时,轧件的三维变形特点. 结果显示:增加张力可以限制金属横向流动,加大厚向变形,使端面厚度更加均匀.     

平整延伸率对Ti-IF冷轧带钢力学性能的影响

冷轧带钢的力学性能与退火后的平整工艺有关。通过对Ti-IF带钢不同延伸率的试验研究,找出平整延伸率对力学性能影响关系,有利于指导生产和产品性能的稳定控制。     

Effect of Deformation between Stands on the Strip Shape in Hot Rolling

A theoretical model about the secondary deformation is developed by the combination of analytical and experimental approaches. A system simulation based on the model is completed to predict the strip profile after the interstand deformation. On the other hand, comprehensive experiments and quantitative comparisons are made to calibrate the model for a wide variety of products. As a result, the correction of the model has been verified by the actual rolling data from production mill and it is helpful to improve the strip shape control.     

高强度不锈钢弧形板冷弯成形机理的集成研究

不锈钢弧形板具有耐腐蚀、强度高、光洁美观等优点,因此在地铁和高铁的建设中得到广泛应用。但因其尺寸精度要求高,导致成形工艺难度大,从而制约了工业的生产。针对此问题,以符拉索夫开口薄壁梁理论为基础,推导出符合高强度不锈钢弧形板成形弯曲角度表达式及横向变形及纵向变形的能量计算式,并编制出成形工艺。之后建立服役行为的数学模型,通过模拟轧制力大小及不锈钢弧形板成形后的回弹量来判定理论道次变形量分配的合理性。对合作企业现有冷弯成形机组改造,依据最优仿真结果进行实验,反复修正后的工艺模型能顺利辊弯出高强度不锈钢弧形板产品,且现场测试数据显示,机组的轧制力能稳定,成形后的回弹量较小,产品质量满足用户精度要求。对形成最优成形工艺,提高辊弯质量和精度有重要作用。     

板带轧机垂直振动的研究分析

建立了板带轧机座垂直振动的力学模型,提出了振动模态,对板形、板厚影响的指标,并以４２００厚板轧机为例,从动力学观点分析了板形、板厚波动的经及改进方法。