共查询到20条相似文献,搜索用时 406 毫秒
1.
对鞍钢股份有限公司冷轧厂1700 mm平整机延伸率控制系统进行了研究。针对平整机实际运行中存在的问题,建立了由轧制力反馈控制、轧制力前馈控制、张力反馈控制组成的新的延伸率控制系统。实际应用表明,带钢低速延伸率偏差≤0.1%,带钢高速延伸率偏差≤0.05%,满足了工艺要求。 相似文献
2.
3.
4.
5.
文章首先简要介绍了冷轧平整机设备的应用意义,然后详细分析了冷轧平整机延伸率控制系统要点,包括其中对总轧制力的控制、对延伸率反馈控制的附加轧制力的控制以及对减速过程附加轧制力的控制等,以供相关人士参考。 相似文献
6.
7.
基于平整机伸长率控制基本原理,针对目前伸长率控制模式下轧制力等预设定值不准确问题,提出采用BP神经网络控制技术,对平整机的轧制力设定、轧制力速度补偿以及平整机入出口张力设定进行优化。实际应用表明,基于BP神经网络的伸长率控制系统大大提高了伸长率控制的响应速度,有效减小了平整机过焊缝伸长率不符合带钢长度,从而提高了产品的成材率。 相似文献
8.
9.
热轧平整机是在常温下对热轧后的低合金钢及碳素钢进行小延伸率的轧制,通过合理的延伸率的控制来提高带钢的质量。 相似文献
10.
11.
12.
13.
14.
15.
16.
17.
Reiner Stelzer Paul‐Dieter Pütz Volker Diegelmann Frank Gorgels Ditmar Piesack 《国际钢铁研究》2005,76(2-3):105-110
The present article describes a research project concerning the influence of bending deformations on strip mechanical properties imparted by temper rolling and a strategy for mill pre‐set to achieve the selected temper rolling degree in as short a time as possible. Research results show that, during strip temper rolling, rolls involved in the process, for example deflector rolls and anti‐sticking rolls, introduce plastic bending deformations into the strip which can amount to more than 30% of the temper rolling reduction, depending on the effective bending radii. Bending tests involving strips made of low‐carbon steel in a tension roller system with an integrated bending unit demonstrate that bending deformations influence the mechanical properties of the strip in a manner similar to the temper rolling process itself. It appears necessary to take account of the bending effects when selecting the optimum temper rolling degree. The most accurate roll force pre‐calculation possible and its application at the mill stand are of major importance for pre‐setting the required temper rolling degree. Existing analytical methods have been unable to yield the necessary calculation accuracy. Combination of an optimised analytical approach with a data‐based model to create a hybrid model has led to significant improvements. The accuracy achieved in the pre‐calculation of the required roll force has helped to improve mill pre‐set of the investigated temper mill and to reduce strip head‐end scrap on average by around 6 m per strip. Based on the annual outputs stated by the plant operator, this makes it possible to achieve a cost saving of more than 200,000 € per year. 相似文献
18.
针对双机架平整机生产极薄规格带钢时表面出现的羽痕缺陷生成机理进行了分析。通过研究发现,羽痕生成是由于极薄规格带钢在宽度方向上由轧制力和张力共同作用下出现不均匀变形,该变形产生的分界线在平整过程中出现了不均匀延伸;而在平整过程中由于弯辊和窜辊的预设定参数不合理、单位张力设定偏低、平整过程中弯辊力与轧制力不匹配等因素导致带钢局部延伸偏大,形成了明显的浪形,此浪形若经过平整机辊缝碾压则生成羽痕缺陷。通过将平整机设定张力提高30%、调整板形曲线为1~8 IU的大边浪、依照带钢厚度调整平整机板形预设定参数以及开发轧制力弯辊力跟随控制模型等措施,极薄规格带钢羽痕缺陷带出品由 206降至51 t/月,基板表面质量满足了国内外多家高端用户的要求。 相似文献
19.
20.
《钢铁冶炼》2013,40(3):163-170
AbstractIn order to improve the flatness of hot rolled thin gauge steel strip, a new type of roll contour configuration was developed for a four-high temper rolling mill based on the finite element method analysis. The roll contour configuration consists of a variable contact back-up roll contour and a positive crown work roll contour. Both can be described as sixth order polynomial functions. The variable contact back-up roll not only reduces the roll stack deflection and contact stress concentration between work and back-up rolls, but also increases the control capability of the bending force of the work roll. Positive crown work roll contour is utilised to compensate roll wear and in turn the length of temper rolling schedule can be prolonged. After this roll contour configuration was applied on the temper rolling mill of Qiangang Company of Shougang Group, the flatness of hot rolled thin gauge strip was improved by 10% and the working efficiency was also increased as the length of temper rolling schedule was increased. 相似文献