摘要
轧机辊系上机后存在不可避免的静态交叉,轧制过程将产生轧辊摆振的动态交叉,极大影响了轧制过程轧机系统稳定性和产品质量,因此辊系轴线交叉状态研究和工业管控是提升轧机装备精度的关键。基于赫兹理论计算辊系小角度交叉时两侧刚度变化规律,分析轴承座装配和测量方法对轧辊轴心位置计算的影响误差,结合轧辊轴线静态交叉的几何关系分析标定和调平数据,通过调整上机轧辊轴承座状态开展振动试验,对理论模型予以验证。研究发现,基于赫兹接触理论的有限长辊间接触区为不完整椭圆,通过计算其压扁和挠曲状态,研究发现在100~1000μrad范围内调控轧辊轴线交叉角度最有利于提高轧机刚度。同时结合辊间交叉状态下轧辊压扁和挠曲变形规律,在标定和调平过程中实时获取和分析辊间交叉状态,在辊系平行的条件下液压压下控制的辊系刚度状态最为稳定,反之轧机两侧辊系刚度差较大。最后针对辊间交叉状态产生两侧刚度差对辊系振动的影响规律开展试验,发现通过减小辊系静态交叉程度可以实现降低轧机两侧刚度差、提高动态辊系位置波动约束限制的目标,能够有效抑制轧辊振动。
There is an inevitable static crossing after the rolling mill roll is tied to the machine,and the rolling process will produce the dynamic crossing of the roll oscillation,which greatly affects the stability of the rolling mill system and the product quality during the rolling process,so the research on the crossing state of the roll system and indus⁃trial control are the key to improve the accuracy of the rolling mill equipment.Based on the Hertz theory,the stiff⁃ness variation law on both sides of the roll system when crossing at small angles was calculated,the influence error of the bearing seat assembly and measurement method on the calculation of the axial position of roll was analyzed,and the calibration and leveling data were analyzed in combination with the geometric relationship of the static crossing of roll axis,and the vibration experiment was carried out by adjusting the state of the roll housing on the upper machine to verify the theoretical model.It is found that the contact area between finite long rolls based on Hertz contact theory is an incomplete ellipse,and by calculating its flattening and deflection states,it is concluded that adjusting the intersection angle of roll axis in the range of 100-1000μrad is the most beneficial to improve the stiffness.At the same time,combined with the flattening and deflection deformation of rolls under the crossover state between rolls,the crossover state between rolls is obtained and analyzed in real time during the calibration and leveling process,and the stiffness state of the roll system controlled under hydraulic pressure in the condition of parallel roll system is the most stable,on the contrary,the stiffness difference of the roll system on both sides of the rolling mill is large.Finally,experiments were carried out on the influence of stiffness difference between the two sides of roll system on the vibration of roll system caused by the crossing state between the rolls.It is found that the goal of reducing the stiffness difference between the two sides of the rolling mill and improving the constraint limit of the dynamic roll sys⁃tem position fluctuation can be achieved by reducing the static crossing degree of the roll system,which can effec⁃tively suppress the roll vibration.
作者
赵向阳
侯新想
彭艳
姬凤川
焦彦龙
李玉鹏
罗旭烨
周娜
ZHAO Xiangyang;HOU Xinxiang;PENG Yan;JI Fengchuan;JIAO Yanlong;LI Yupeng;LUO Xuye;ZHOU Na(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066000,Hebei,China;National Engineering Research Center for Equipment and Technology of Cold Rolled Strip,Yanshan University,Qinhuangdao 066000,Hebei,China;Qian’an Iron and Steel Company,Shougang Co.,Ltd.,Tangshan 063000,Hebei,China)
出处
《钢铁》
北大核心
2025年第9期122-132,共11页
Iron and Steel
基金
国家自然科学基金区域创新发展联合基金重点支持资助项目(U20A20289)
河北省自然科学基金创新群体资助项目(E2021203011)
国家自然科学基金面上基金资助项目(52475409)。
关键词
轧制过程
轧机刚度
轴线交叉
赫兹理论
刚度差
动力学
抑振
工业应用
rolling process
mill stiffness
axis crossing
Hertz theory
stiffness difference
dynamics
vibration suppression
industrial applications
