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对热轧轧制力公式做麦克劳林级数展开,建立轧辊表面振纹再生振动的非线性动力学模型。以实际某轧机技术参数为例,应用数值仿真的方法对比了轧辊表面振纹形成前后轧机振动的状态,仿真表明轧辊表面振纹严重影响了带钢表面质量。同时,通过比较不同振纹深度对轧机振动的影响,得到了振纹深度与振纹激励、辊系振动强度的关系曲线和系统位移响应的分岔图。最后,针对轧辊表面振纹的形成和再生振动,提出两条抑制振纹的措施,现场试验和理论分析证明该方法具有良好的效果。
The rolling formula of the hot rolling force was used to develop the McLaughlin series and the nonlinear dynamic model of the vibration of the roll surface was established. Taking the actual technical parameters of a rolling mill as an example, the state of the rolling mill before and after the formation of the roll surface was compared by numerical simulation. The simulation shows that the roll surface vibration seriously affects the quality of the strip surface. At the same time, the bifurcation diagrams of the relationship between the vibration depth and vibration, the vibration intensity of the roller system and the displacement response of the system are obtained by comparing the influence of different vibration depths on the rolling mill vibration. Finally, two measures to restrain the vibration of the roll are proposed according to the formation and regeneration of the vibration on the roll surface. The field test and theoretical analysis show that the method has good effect.