【作者】 郑旭涛； 李洪波； 张杰； 张鹏武； 胡伟东； 石磊；

【Author】 ZHENG Xu-tao;LI Hong-bo;ZHANG Jie;ZHANG Peng-wu;HU Wei-dong;SHI Lei;School of Mechanical Engineering,University of Science and Technology Beijing;Wuhan Iron and Steel (Group) Corporation;

【机构】 北京科技大学机械工程学院； 武汉钢铁集团；

【摘要】 现场生产中,热轧薄带钢在酸轧线开卷时出现较大的拱背现象,容易使板带表面出现刮痕,从而引起表面质量缺陷,影响涂镀生产和使用。本文针对热轧卷取过程,通过建立卷取过程力学模型,分析了卷取张力、温度、几何参数等因素对带钢厚度方向上纤维条延伸差的影响作用。分析结果表明:带钢在卷取过程中,上下表面会出现延伸率差,从而引起开卷时的拱背现象;延伸率差随着卷取温度、厚度和卷取半径的增加而增加;而卷取张力则存在着临界值,临界值以内延伸率差不变,超过临界值,则随着张力增加而显著增加。因此,提出了可行的降低张力的控制措施,并进行工业生产试验。试验结果证明,控制方法有效,拱背高度明显降低。更多还原

【Abstract】 When hot-rolled thin strip coiled in the PLTCM,the C-shaped warping are always happened,which tend to make the strip surface scratched and lead to surface defects.In this paper a mechanical model is built for the coiling process.The effects of coiling tension etc.on the stretch difference between upper and lower strip surface were analyzed.Results show that the stretch difference is existed in coiling process and will generate the C-shaped warping when strip is uncoiled.And the stretch difference will increase with the increasemcnt of the coiling temperature,strip thickness and coiling radius.When coiling tension is lower than a critical value,the stretch difference is nothing with tension;when coiling tension is bigger than the critical value,the stretch difference has positive correlation with tension.Then,a feasible control method was presented and tested.The test results showed that the Cshaped warping was effectively relieved.更多还原