CAJ | 학술논문

SI-FLAT 板形仪是国内宽带钢冷连轧机首次采用的非接触式工业用板形仪，但实际使用过程中发现，对于常轧规格的带钢，其激振频率设定始终为同一固定值，激振力仅随张应力的变化而变化，导致板形控制不稳定，激振频率的设置严重影响着板形检测的精度．本文在分析现场实际生产数据的基础上，提出了激振频率的设置应该遵循的两个基本原则，即振幅控制原则和检测间隔控制原则．为了对带钢振动进行固有频率和受迫振动振幅的分析和计算，采用大型有限元软件 ANSYS12.0建立了带钢振动仿真模型，分析了带钢板形、宽度、厚度、张应力等因素所导致的带钢固有频率波动对带钢振幅的影响．研究发现，张应力和板形对带钢固有频率的影响较大．最后，基于振幅控制原则和检测间隔控制原则提出了可行性方案，即通过限制最小张应力，减小板形对测量结果的影响；同时为了控制最小检测间隔，便于对板形的在线控制，激振频率的大小应根据带钢速度进行调节设定．
SI-FLAT 판형의시국내관대강랭련알궤수차채용적비접촉식공업용판형의，단실제사용과정중발현，대우상알규격적대강，기격진빈솔설정시종위동일고정치，격진력부수장응력적변화이변화，도치판형공제불은정，격진빈솔적설치엄중영향착판형검측적정도．본문재분석현장실제생산수거적기출상，제출료격진빈솔적설치응해준순적량개기본원칙，즉진폭공제원칙화검측간격공제원칙．위료대대강진동진행고유빈솔화수박진동진폭적분석화계산，채용대형유한원연건 ANSYS12.0건립료대강진동방진모형，분석료대강판형、관도、후도、장응력등인소소도치적대강고유빈솔파동대대강진폭적영향．연구발현，장응력화판형대대강고유빈솔적영향교대．최후，기우진폭공제원칙화검측간격공제원칙제출료가행성방안，즉통과한제최소장응력，감소판형대측량결과적영향；동시위료공제최소검측간격，편우대판형적재선공제，격진빈솔적대소응근거대강속도진행조절설정．
SI-FLAT shapometer is a non-contacting industrial shapometer which was firstly used in domestic wide-strip tandem cold rolling mills. It was found during production that excitation frequency was set as a fixed value for often rolled strips of different specifications and that excitation force only changed with tensile stress,which led to the unstable shape control of strip. Excitation frequency had a great influence on the detection precision of strip shape. Based on the analysis of production data,two basic principles were put forward,which are amplitude control princi-ple and detection internal control principle. For analyzing and calculating the natural frequency and amplitude of forced vibration of strip,the vibration simulation model was built by the finite element software ANSYS12.0. With the model,the influences of some factors,such as strip shape,width,thickness and tensile stress,on the fluctua-tion of natural frequency were analyzed. It was found that tensile stress and shape had great effects on the natural fre-quency of strip. Finally,the feasible project was put forward based on the amplitude control principle and the detec-tion internal control principle. Through limiting the minimum tensile stress,the influence of shape on the measure-ment result could be reduced,and for controlling the minimum detection interval so as to improve the on-line shape,the excitation frequency should be adjusted according to the speed of strip.