新一代高技术宽带钢冷轧机全机组一体化板形控制

来源期刊:中南大学学报(自然科学版)2019年第7期

论文作者:曹建国 江军 邱澜 李艳琳 何安瑞 张勇军

文章页码:1584 - 1592

关键词:冷轧;轧机机型;带钢;板形控制;边降控制

Key words:cold rolling; mill type; strip; profile and flatness control; edge drop control

摘    要:针对新一代高技术宽带钢冷轧机冷轧薄板高精度板形质量边降、凸度、同板差和平坦度等多指标日趋严苛难题,结合生产实践分析宽带钢冷轧机国际主流机型及其板形控制特点,提出宽带钢冷连轧“门户机架”“中间机架组”和“成品机架”全机组一体化板形控制策略。研究结果表明:从四辊和六辊冷轧机的凸度和边降构成特征可知,四、六辊轧机轧辊压扁的不均匀变形和“有害接触区”弯矩在带钢凸度和边降构成均占主要比例,四辊轧机板形控制能力随着宽度的增加而显著增强,且对四辊和六辊轧机高精度一体化板形控制应采取明显不同的实现途径。

Abstract: Aiming at the severe problem of the increasingly high precision cold rolled sheet profile and flatness quality requirement with multi-index edge drop, crown, transverse thickness deviation and flatness for the new generation of high-tech wide strip cold rolling mill, the leading mainstream mill types and its shape control characteristics were analyzed based on producing practice, the whole units and integration of “gate stand”, “intermediate stand group” and “final product stand” shape control strategy of wide strip tandem cold rolling was proposed. The results show that the composing characteristics of the edge drop and crown of 4-high and 6-high cold rolling mills show that the uneven deformation of rolls flattening and the deflection of work rolls caused by the pressure in undesired overhung contact areas between rolls are the main contributions to the strip crown and edge drop ratio. It is found that the profile and flatness controllability must be enhanced significantly with the increasement of the strip width in 4-high rolling mills, and the distinctly different approaches to high precision integrated profile and flatness control should be adopted in the 4-high and 6-high rolling mills.

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