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为了提高冷轧带钢产品质量,东北大学轧制技术及连轧自动化国家重点实验室自主开发了成套的单机架冷轧机自动化系统,主要包括轧机主令控制、液压伺服控制、自动厚度控制、自动板形控制、钢卷跟踪、数据采集、模型设定等功能,并研发了高精度的数学模型、基于成本函数的轧制规程多目标优化、加减速过程的高精度张力控制策略、加减速过程带钢厚度补偿策略及轧制工艺优化等先进控制技术。所开发的自动化控制系统已推广应用到多条单机架冷轧机生产线中,现场应用表明:所开发的控制系统运行稳定,轧制规程设定合理,模型预报精度高;在轧制0.18mm极薄规格带钢时,稳速轧制的厚度偏差可控制在±2μm以内,产品成材率和产品质量大幅度提高。
In order to improve the quality of cold-rolled strip steel products, Northeastern University State Key Laboratory of Rolling Technology and Rolling Automation independently developed a set of single-stand cold rolling mill automation system, including rolling mill master control, hydraulic servo control, automatic thickness control, Automatic plate control, coil tracking, data acquisition, model setting and other functions, and developed a high-precision mathematical model, based on the cost function of the rolling schedule multi-objective optimization, acceleration and deceleration process of high-precision tension control strategy, acceleration and deceleration Process strip thickness compensation strategy and rolling process optimization and other advanced control technology. The developed automation control system has been widely applied to a number of single-stand cold rolling mill production lines. The field application shows that the developed control system runs stably, the rolling schedule is set reasonably and the model forecasting precision is high. During the rolling of 0.18mm pole Thin gauge strip, the thickness of the steady-speed rolling deviation can be controlled within ± 2μm, product yield and product quality significantly improved.