摘要
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 force formula was expansion with the Maclaurin series in the hot-rolling,meanwhile the non-linear dynamic model that the roll surface marks regenerated vibration was established.Taking the actual technical parameters of a rolling mill for example,the movement patterns of the system were compared with the application of numerical simulation method when the marks were on the roll surface or no;in the meanwhile,the simulation shows that the roll surface chatter marks a serious impact on the quality of the strip surface.Through the comparison of the influence of the different marks depth for the mill system,it obtains the relationship curves that are between marks depth and excitation,rolls vibration intensity and the bifurcation diagrams that are the system displacement response.Finally two measures are proposed to ease the marks in view of the roll surface marks formation and the influence of regenerated vibration,the field tests and the theoretical analysis all prove that the methods have a good effect.
出处
《中国冶金》
CAS
2014年第5期59-64,共6页
China Metallurgy
关键词
热连轧机
振纹
再生振动
非线性
变速轧制
hot rolling mill
marks
regenerative vibration
nonlinear
variable speed rolling
