基于轧件水平振动的轧机辊系振动补偿模型
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摘要
考虑轧件水平振动对轧制力和摩擦力动态特性的影响,建立了一种基于轧件水平振动的轧机辊系振动补偿模型。根据广义耗散的Lagrange原理,分别沿轧制方向和垂直轧制方向建立动力学平衡方程。以某厂四辊板带轧机为例,仿真分析轧件水平振动速度和轧机辊系垂直振动位移随轧辊转速的变化规律,测试了5组不同转速下的轧制力数据;对模型补偿前后轧制力理论值与测试数据误差进行了对比。研究结果表明:补偿后的模型轧制力理论值与实测数据之间的误差大大减小。
Considering the influence to the dynamic characteristics of rolling force and rolling friction from horizontal vibration of rolled piece,a compensative vibration model of roll system is established. According to the Lagrange principle of generalized dissipation,dynamic equilibrium equation is established respectively both in rolling direction and in vertical direction. With four-high strip mill of a factor as an example,simulating and analyzing the horizontal vibration velocity of rolled piece and the vibration displacement of roll under different rolling speeds. Five sets of rolling force data at different rolling speeds are obtained. Finally,the theoretical values of rolling force and the test data are compared with the model before and after optimization. Research results show that: the calculated values of the rolling force after optimization are far more close to the actual working condition;
Considering the influence to the dynamic characteristics of rolling force and rolling friction from horizontal vibration of rolled piece,a compensative vibration model of roll system is established. According to the Lagrange principle of generalized dissipation,dynamic equilibrium equation is established respectively both in rolling direction and in vertical direction. With four-high strip mill of a factor as an example,simulating and analyzing the horizontal vibration velocity of rolled piece and the vibration displacement of roll under different rolling speeds. Five sets of rolling force data at different rolling speeds are obtained. Finally,the theoretical values of rolling force and the test data are compared with the model before and after optimization. Research results show that: the calculated values of the rolling force after optimization are far more close to the actual working condition;
引文
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[2]刘彬,蒋金水,赵武,等.轧机转速波动测量的扭振监测实验研究[J].计量学报,2007,28(3):272-275.
[3]谢长贵,曾海.1220冷连轧机带钢表面振纹机理的研究[J].计量学报,2015,36(6):595-598.
[4]Niziol J,Swiatoniowski A.Numerical analysis of the vertical vibrations of rolling mills and their negative effect on the sheet quality[J].Journal of Materials Processing Technology,2005,162/163(20):546-550.
[5]范小彬,臧勇,王会刚.热连轧机垂直振动特性研究[J].中国机械工程,2010,21(15):1801-1804.
[6]Liu F,Liu B,Liu H R,et al.Vertical vibration of strip mill with the piecewise nonlinear constraint arising from hydraulic cylinder[J].International Journal of Precision Engineering and Manufacturing,2015,16(9):1891-1898.
[7]王桥医,黄海军,李志华.金属塑性加工工作界面非稳态润滑轧机振动控制[J].中南大学学报(自然科学版),2010,41(4):1418-1423.
[8]Yang X,Li Q,Tong C N,et al.Vertical vibration model for unsteady lubrication in rolls-strip interface of cold rolling mills[J].Advances in Mechanical Engineering,2012,4(12):1432-1437.
[9]侯东晓,朱月,刘浩然,等.基于动态轧制力的冷轧机非线性振动特性研究[J].机械工程学报,2013,49(14):45-50.
[10]邹家祥.冷连轧机系统振动控制[M].北京:冶金工业出版社,1998.