板形检测辊挠度变化对冷轧带钢原始波形信号的影响  

Effect of Shape Detecting Roll Deflection on Original Waveform Signal of Cold Rolling Strip

作　　者：李荣民[1,2] 杨利坡[1] 于丙强[1] 刘宏民[1] 于华鑫[1] 

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [2]河北钢铁集团衡水薄板有限公司,河北衡水053000

出　　处：《钢铁》2013年第5期41-45,共5页Iron and Steel

基　　金：国家科技支撑计划资助项目(2011BAF15B03;2011BAF15B02);河北省高等学校自然科学研究青年基金资助项目(Q2012104);河北省自然科学钢铁联合研究基金资助项目(E2011203004)

摘　　要：综合考虑板形检测辊自重及其所受带钢张力的影响,利用正弦波和样条曲线虚拟各通道的零点偏差,基于截点法建立了针对检测辊挠度动态变化的原始波形零点补偿模型。对于检测辊自重造成的离线零点偏差,对其进行虚拟正弦截点补偿;对于动态大张力造成的在线零点偏差,利用样条曲线实时拟合零点偏差。从实测曲线中减去零点偏差拟合曲线,即可获得更稳定的径向压力值或板形值,应用过程中还可以采用递推平滑法使其更可靠地反映在线带钢的实际板形状况。实测数据表明,各通道的原始波形AD零点偏差从补偿前的600左右下降到补偿后的50以内,径向压力零点偏差从130N左右下降到10N以内。因此,该零点补偿方法对于提高板形检测精度和板形控制精度具有重要的意义。Considering the weight of shape detection roll and the strip tension,using a sine wave or a spline curve to virtual zero deviation of each channel,the dynamic zero compensation model was established based on the cut-off point method for deflection changes of the shape detection roll.For offline zero deviation by the shape detection roll＇s mass,the virtual sine cut-off point method was designed to compensate the offline zero deviation.For the online zero deviation by the dynamic high tension,the zero deviation was fitted by the spline curve to do it.Zero deviation fitting curve was subtracted from the measured curves,then more stable radial pressure value or the shape value can be obtained.In the application process,the recursive smoothing method can be used to make it more reliable for reflecting the actual shape condition of online strip.The measured datum show that the original waveform AD zero deviations of each channel reduces from 600 to within 50 after compensation,and the radial pressure decreases from 130 N to 10 N.So the zero compensation method has a great significance to improve the shape detection accuracy and shape close-loop control accuracy.

关 键 词：板形检测 板形信号 检测辊 挠度补偿 冷轧带钢 

分 类 号：TG335.12[金属学及工艺—金属压力加工]