Research on variable crown work roll curve design for W-shaped profile control of strips
Research on variable crown work roll curve design for W-shaped profile control of strips
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DOI：
10.1007/s00170-023-12263-7
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发表时间：
2023-09
期刊：
影响因子：
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通讯作者：
Fen Wang;Chao Liu;Anrui He;Zhengyi Jiang;Ruilin Miao;Jian Shao;Yi Qiang;Xuegang Zhou;P. Liu;Qiangguo Zhao
中科院分区：
文献类型：
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作者：
Fen Wang;Chao Liu;Anrui He;Zhengyi Jiang;Ruilin Miao;Jian Shao;Yi Qiang;Xuegang Zhou;P. Liu;Qiangguo Zhao
板形控制一直是板带企业面临的挑战之一。宽轧机生产线上经常出现“W”形板形缺陷，严重影响了企业产品质量的提高和生产的稳定性。由于缺乏有效的W形板形分布特性控制方法，传统的连续变凸度（CVC）或CVC+轧制曲线不能满足当前带钢轧制质量标准的要求。为此，利用曲线分段叠加法生成了一种新型辊型曲线，实现了W形辊型的精确控制。根据CVC轧辊轮廓曲线，沿带钢宽度方向沿着构造轧辊校正区域。此外，采用分段余弦函数对轧制曲线进行了修正，降低了四分之一板宽处的压下量，提高了板边处的压下量。应用结果表明，该辊型具有四次凸度调整能力，能有效解决宽辊米尔斯生产中的W形问题，且不影响原辊型的二次凸度调整特性。
The control of strip profiles has been one of the challenges faced by plate and strip enterprises. Wide rolling mill lines are usually plagued with W-shaped profile defects, which severely hamper the improvement of strip product quality and production stability in enterprises. Due to the lack of efficient control methods for the distribution characteristics of W-shaped profiles, the conventional continuous variable crown (CVC) or CVC plus rolling curve cannot meet the current quality standards required for strip rolling. Therefore, a novel roll contour curve was created by utilising the curve subsection superposition method to achieve precise control of the W-shaped profile. The roll correction areas were constructed along the width direction of strips based on the contour curve of a CVC roll. Additionally, the roll curve was modified by using the segmented cosine functions, to lower the reduction at the quarter of the strip width and increase the reduction at the strip edge. The application findings demonstrate that the proposed novel roll contour, which also has a capacity for the quartic crown adjustment, can effectively address the W-shaped profile issue of strips in the production of wide rolling mills, without compromising the quadratic crown adjustment characteristics of the original roll contour.