六辊平整机非对称轧制过程板形预报与控制技术

发布时间：2018-10-25 12:08

【摘要】：近年来,由于家用汽车、军工、建筑、电器、造船、电子、航天等行业的飞速发展,板带材的需求也随之激增,这使得板带生产工业飞速发展。与此同时,大部分板带用户由低端转向高端,板带行业的市场竞争也日趋激烈,对产品板形精度的要求也越来越苛刻,而平整作为板带产品最接近成品的一道工序,对成品带钢的板形质量起着举足轻重的影响。首先,论文针对六辊平整机组非对称轧制过程中存在的带材跑偏、工作辊与中间辊及支撑辊辊型不对称、来料断面形状分布不对称等问题,将充分考虑到六辊平整机的设备与非对称轧制的工艺特点,建立一套适合于六辊平整机非对称轧制过程中基于机理的板形模型,并通过现场试验验证模型的精度;同时,为方便现场使用,将在上述理论研究成果的基础上,编制出相应的板形预报分析软件,并利用该软件模拟出非对称过程中各个因素对板形的影响规律,为机组板形缺陷的治理奠定基础;随后,将针对普通UCM机型的平整机组对肋浪、复合浪等高次非对称复杂浪形控制效果不佳的问题,提出一套配置工作辊非对称弯辊、中间辊非对称弯辊、中间辊上下非对称窜辊的AS-UCM新机型,建立了适合于AS-UCM新机型的平整机组的板形控制模型,并在此基础上研究AS-UCM机型的平整机组单独改变工作辊左右弯辊力差、中间辊左右弯辊力差以及中间辊窜动量差对负载辊缝的的影响,编制相应的软件;最后,为了更好地将科研理论服务于生产,用实践检验理论、验证理论,将结合六辊平整机组的设备和工艺特点,把六辊平整机组非对称轧制过程中的基于机理的板形模型应用于国内某1220六辊平整机组的生产实践中,通过模拟计算出的板形与现场实测记录的板形做对比,验证模型的精度,并将基于机理的板形控制手段应用到实际控制中,同时分别模拟新机型AS-UCM平整机和普通UCM平整机对非对称高次复杂浪形的板形控制效果,通过对比得出新型AS-UCM平整机对非对称高次复杂浪形的治理效果。
[Abstract]:In recent years, due to the rapid development of domestic automobile, military industry, construction, electrical appliances, shipbuilding, electronics, aerospace and other industries, the demand for strip materials has also increased sharply, which makes the plate and strip production industry develop rapidly. At the same time, most of the plate and strip users turn from the low end to the high end, and the market competition in the plate and strip industry is becoming increasingly fierce, and the requirements on the flatness accuracy of the products are becoming more and more stringent, and flatness is regarded as a process closest to the finished products of the plate and strip products. It plays an important role in the shape quality of finished strip. First of all, the paper aims at the problems of strip deviation, asymmetry of work roll, middle roll and support roll, asymmetric distribution of feed section shape and so on in the process of asymmetric rolling of six-high leveling mill. Taking fully into account the equipment of six-high leveling machine and the technological characteristics of asymmetric rolling, a set of shape model based on mechanism is established, and the accuracy of the model is verified by field test, at the same time, In order to facilitate the field use, the corresponding software for shape prediction and analysis will be compiled on the basis of the above theoretical research results, and the influence of various factors in the asymmetric process on the shape of the plate will be simulated by the software. It lays the foundation for the treatment of the shape defect of the unit, and then, aiming at the problem that the unsymmetrical complex wave shape control effect of the common UCM type leveling machine is not good, a set of unsymmetrical bending rollers with work roll is put forward for the problems of the unsymmetrical complex wave shape control effect such as the compound wave and the equal height of the complex wave. A new AS-UCM machine for asymmetric bending of intermediate roll and asymmetrical channeling of middle roller up and down is established. The flatness control model of leveling machine suitable for AS-UCM new type is established. On this basis, the influence of the work roll force difference, the middle roll left and right bending roll force difference and the intermediate roll channeling momentum difference on the load roll gap of the AS-UCM mill is studied, and the corresponding software is compiled. In order to better serve the scientific research theory in production, the theory will be verified by practice, which will combine the equipment and process characteristics of the six-high leveling unit. This paper applies the machine-based flatness model in the asymmetric rolling process of the six-high leveling mill to the production practice of a 1220 six-high leveling mill in China. The accuracy of the model is verified by comparing the calculated shape with the measured shape recorded on the spot. The shape control method based on mechanism is applied to the practical control, and the shape control effect of the new type AS-UCM leveling machine and the common UCM leveling machine on the asymmetric high order complex wave shape is simulated, respectively. Through comparison, the treatment effect of the new AS-UCM leveling machine on asymmetric high order complex wave is obtained.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG335.5

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