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本文对不锈钢冷连轧机组所用张力辊的几何参数、材质、传动功率进行了计算选型,避免了电机功率不够而导致的带钢打滑或电机功率过大而造成的浪费。 相似文献
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带钢截面和边缘降调控功效研究是板形控制技术的核心之一,也是冷连轧机板形自动控制系统模型的主要设计依据.以六辊精密冷连轧机为例,提出了包含各项影响因素和调控手段的冷连轧机截面和边缘降控制方程;通过有限元仿真计算得到了弯辊和窜辊等调节手段下的板形调控性能参数,其结果对冷连轧机辊形设计、弯辊窜辊工艺规程的制定,特别是对带钢截面、边缘降闭环自动控制系统的实现,具有重要的参考价值. 相似文献
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冷连轧机边降控制窜辊数学模型研究 总被引:1,自引:0,他引:1
针对某冷连轧机边降控制存在的问题,采用显示动力学有限元方法建立了四辊轧机辊系与轧件一体化有限元仿真模型,分析了影响带钢边降的主要因素带钢厚度和带钢变形抗力对带钢边降的影响。基于边降控制机理和自主设计的EDW边降控制工作辊辊形特点,用边降控制等效面积法建立了冷连轧机边降控制窜辊数学模型,通过有限元仿真数据分析和工业轧制试验确定了模型参数。1700四辊冷连轧机应用本窜辊模型投入自主研制的EDW边降控制工作辊和配套的VCR变接触支持辊,取得了电工钢板边降平均值≤7 μm的比率达到98.22%且同板差≤10 μm的比率达到97.25%的显著生产实绩。 相似文献
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利用大型有限元软件Marc建立了轧制过程三维有限元仿真模型,以某1700mm冷连轧机为对象,分析了冷连轧机不同入口厚度和不同架次下的金属横向流动的特点,发现冷连轧机门户机架1#机架带钢厚度最厚、压下量最大,带钢金属横向流动最有条件,为实现凸度和平坦度的解耦创造了基础。提出了一种新的边降控制工作辊辊形即连续变锥度工作辊CVTR(Continuously Variable Taper Roll),并配套使用VCR(Varying Contact Length Backup Roll)支持辊,提高了轧机的辊缝横向刚度,增强了轧机抵抗轧制力波动而保持不变的能力,为实现板形的良好控制创造了条件。 相似文献
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介绍冷轧平整机组的延伸率控制系统,包括延伸率的定义、测量和控制技术等。对延伸率的直接和间接测量方法进行比较,分析各自的优缺点,提出在恒延伸率控制模式下,针对不同的带钢厚度,采用调节轧制力或者张力的方法来保证延伸率的恒定。 相似文献
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在秒流量方程的基础上,充分考虑厚度偏差和张力波动对速度的影响,推导并建立了1个冷连轧综合速度控制模型,并根据动态结构图配置了控制器.通过对比仿真研究,进一步优化了控制器参数,在某1 550 mm冷连轧生产应用中,将张力、厚度指标作为控制目标.速度参数作为控制对象,使张力波动从调整前的300 kg减小到目前的90 kg,... 相似文献
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The strip with a time-dependent tension moves, namely a harmonically varying tension about a constant initial tension. The nonlinear vibration model of moving strip between two mills with time-dependent tension was established. Approximate solutions were obtained using the method of multiple scales. Depending on the variation of the tension, three distinct cases arisei frequency away from zero or two times the natural frequency, frequency close to zero, frequency close to two times the natural frequency. For frequency close to zero and away from zero and two times the natural frequency, the system is always stable. For frequency close to two times the natural frequency, the stability is analyzed respectively when the trivial solution exists and the nontrivial solution exists. Numerical simulation was made on some 1660 mm tandem rolling mill, and the stable regions and unstable regions for parametric resonance are determined with different cases. The rolling speed and the thickness of strip have str ng influences on the stability of principle parametric resonances. But the distance between two mills has little influence on the stability of principle parametric resonances. 相似文献
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Nonlinear vibrations of the moving strip between two mills of some cold tandem rolling mill in the rolling process were investigated. The strip is moving with a time-dependent tension, namely a harmonically varying tension about a constant initial tension. The transverse parametric vibration model of moving strip in the rolling process was established. Approximate solutions were obtained using the method of multiple scales. Depending on the variation of the tension, three distinct cases arise: frequency away from zero or two times the natural frequency; frequency close to zero; frequency close to two times the natural frequency. For frequency close to zero and away from zero and two times the natural frequency, the system is always stable. For frequency close to two times the natural frequency, the stability is analyzed respectively when the trivial solution is existence and the nontrivial solution is existence. Numerical simulation was made on some 1660mm tandem rolling mill, the stable regions and unstable regions for parametric resonance are determined with different cases. The rolling speed and the thickness of strip have strong influences on the stability of principle parametric resonances. But the distance between two mills has little influence on the stability of principle parametric resonances. 相似文献
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本文针对攀钢冷轧厂酸轧机组联机活套张力波动较大,频繁发生带钢跑偏,严重影响机组生产的情况,对活套张力控制系统进行了研究,阐述了活套张力设定及动态转矩补偿算法并给出了相关的计算公式;通过对活套张力控制环节进行了优化后,解决了张力波动大,带钢跑偏的问题,满足了机组生产对联机活套张力及套量的要求。 相似文献
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三辊张力单元张力与带钢厚度、材质及压下量关系的研究 总被引:2,自引:0,他引:2
研究了三辊张力单元产生的张力与带钢厚度、带钢材质及压下量的关系,建立了相应的数学力学模型,得出了张力计算式,计算结果与实际值相比较误差很小.其研究结果可用来指导张力单元装置的设计、操作模式的制定,并为解决类似力学课题提供了参考. 相似文献