鞍钢冷轧1#线轧机甩机架功能AGC技术研究与实现

发布时间：2018-05-06 22:25

本文选题：冷轧机 + 甩机架　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：当前,钢铁行业整体市场形势急剧下滑,国家已经开始供给侧结构性改革。在此市场环境下,鞍钢冷轧厂必须内部挖潜,保证产品质量,提升设备功能精度,降本增效,迫切需要加强以节约资源、柔性生产为导向的冷轧核心关键技术的研发。本文以鞍钢股份冷轧厂1#线连轧机组改进项目为切入点,通过改进控制方法,增加控制手段,对于提高产品厚度控制精度,提高成材率,降低能源消耗,稳定机组运行,使生产线具备一定的柔性生产能力,具有非常重要的现实意义。甩机架模式轧制即甩掉某一机架进行轧制,由原来的五机架连轧改为四机架连轧。本文首先研究并构建了冷轧机甩机架模式运行时基于Smith预估器的AGC控制系统,确定了控制参数。其次对影响厚度波动的原因进行了分析,其间重点研究了轧辊偏心引起的带钢厚度波动,建立全机架轧辊偏心补偿系统。同时对扩展物质流量控制方式存在的问题进行了分析并提出改进方案,通过调整测厚仪在机架的安装位置,增加第3、第4机架AGC控制功能,应用激光测速仪和新型张力辊编码器测量带钢速度,准确计算出全机架前滑实际值,采用自适应算法,实现对前滑模型进行优化。最后完成甩机架轧制模式的软硬件系统设计、编程和调试工作。通过在线PDA系统对厚度曲线进行实测记录,对AGC控制综合改进后的效果进行评价,证明了本次改进保证厚度精度的甩机架运行模式轧制控制技术的有效性。
[Abstract]:At present, the steel industry as a whole market situation plummeted, the country has begun to supply-side structural reform. In this market environment, Angang Cold Rolling Plant must tap potential inside, guarantee product quality, improve equipment function precision, reduce cost and increase efficiency. It is urgent to strengthen the research and development of key cold rolling core technology, which is oriented by flexible production and save resources. In this paper, the improvement project of the continuous rolling mill on the 1# line of Anshan Iron and Steel Co., Ltd is taken as the breakthrough point. By improving the control method and increasing the control means, the paper can improve the precision of the product thickness control, increase the yield of the product, reduce the energy consumption, and stabilize the operation of the unit. So that the production line has a certain flexible production capacity, has a very important practical significance. The rolling mode of shaking stand is to shake off one stand and change it from the original five stand to four stand continuous rolling. In this paper, the AGC control system based on Smith predictor is first studied and constructed, and the control parameters are determined. Secondly, the causes of the thickness fluctuation are analyzed, and the strip thickness fluctuation caused by the roll eccentricity is studied, and the compensation system of the roll eccentricity of the whole stand is established. At the same time, the problems existing in the extended mass flow control mode are analyzed and an improved scheme is put forward. By adjusting the installation position of the thickness gauge in the rack, the AGC control function of the 3rd and 4th frame is added. The laser velocimeter and a new tension roller encoder are used to measure the speed of steel strip, and the actual value of the front slip of the whole frame is calculated accurately, and the forward slip model is optimized by using the adaptive algorithm. Finally, the software and hardware system design, programming and debugging of rolling mode are completed. The effect of comprehensive improvement of AGC control is evaluated by measuring and recording the thickness curve by on-line PDA system. The effectiveness of rolling control technology of rolling mode which ensures the thickness accuracy of the swinging stand is proved.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG333

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