碳纤维气流展纤工艺研究及均匀性分析

Research on carbon fiber airflow spreading technology and uniformity analysis

为研究碳纤维在气流作用下的展纤过程,研制了一套气流展纤装置。通过多因素正交实验研究了气流流速、支撑辊跨距和纤维悬垂量对展纤宽度的影响,并对实验结果进行了分析。采取MATLAB数字图像处理技术,对展纤后的碳纤维图像进行了缩小、灰度化和增强等预处理,引入了变异系数与概率分布,对碳纤维横、纵向分布均匀性进行表征。结果表明:气流展纤宽度与纤维悬垂量在一定范围内呈线性正相关,选取最优工艺参数,即气流流速为4 m/s,支撑辊跨距为140 mm,有着较好的展纤效果;采用数字图像分析法能够较好地表征碳纤维气流展纤均匀性,并与实验结果相一致,具有较好的工业应用前景。

To study the fiber spreading process of carbon fiber by airflow,a set of airflow fiber spreading device has been developed.The effects of airflow velocity,support roller span,and fiber overhang on fiber spreading width were studied through multiple orthogonal experiments,and the experimental results were analyzed.The MATLAB digital image processing technology was used to preprocess the unfolded carbon fiber image,including reduction,grayscale,and image enhancement.The coefficient of variation and probability distribution were introduced to characterize the uniformity of the transverse and longitudinal distribution of carbon fibers.The results show that there is a linear positive correlation between the width of air flow fiber expansion and the fiber overhang within a certain range.Choosing the optimal process parameters of air flow velocity of 4 m/s and support roller span of 140 mm has a good fiber spreading effect.The digital image analysis method can better characterize the uniformity of carbon fiber airflow and is consistent with experimental results,which has good industrial application prospects.