轧钢过程中智能化控制系统的应用研究

随着科技的不断发展,轧钢过程中智能化控制系统的应用成为提高生产效率、产品质量和资源利用效率的关键手段。文章从轧钢过程的关键环节与技术要求出发,深入探讨了温度控制、辊系控制与调整以及高速连铸轧制技术等方面的技术要求。随后,重点分析了智能化控制系统在轧钢中的应用,包括自动化传感器与数据采集技术、控制算法与智能系统,以及实时监测与远程控制。最后,通过实际案例和数据分析,详细论述了智能化系统在提升生产效率、产品质量和资源利用效率方面所带来的显著效益。

Modeling and identification of HAGC system of temper rolling mill

Including servo valve, hydraulic cylinder, mill and sensor and ignoring nonlinear factors, the linear dynamic model of hydraulic automatic gage control(HAGC) system of a temper rolling mill was theoretically derived. The order of the model is 4/4, and can be reduced to 2/2. Based on modulating functions method, utilizing numerical integration, we constructed the equivalent identification model of HAGC, and the least square estimation algorithm was established. The input and output data were acquired on line at temper rolling mill in Shangshai Baosteel Group Corporation, and the continuous time model of HAGC system was estimated with the proposed method. At different modulating window intervals, the estimated parameters changed remarkably. When the frequency bandwidth of modulating filter matches that of estimated system, the parameters can be estimated accurately. Finally, the dynamic model of the HAGC was obtained and validated based on the spectral analysis result.

大型铝合金C形截面环轧制过程数值模拟和轧制区成形规律分析

以目标外径为Ф2500 mm的C形截面铝合金环件为研究对象,采用Abaqus有限元软件对环件轧制过程进行数值模拟。对2219铝合金材料试样进行热压缩实验,得到不同的应变速率(0.01~10 s^(-1))以及温度(350~500℃)条件下材料的真应力-真应变曲线,将其作为模拟实验的材料属性。通过数学建模建立辊系运动控制策略,并以环件外径稳定长大为条件计算了芯辊的进给速度;针对实际轧制过程中出现的前滑现象,修正了锥辊的实时转速;运用Fortran语言对子程序进行二次开发,以控制仿真过程中辊系的运动;在提交运算时调用子程序,由此建立了C形截面环件轧制过程的有限元模型,分析并得出了环件轧制区内部温度场和应力场呈轴向对称分布的特点,以及轴向中部金属横向流动速度较快及环件在第8道次时完全充型等成形规律。