利用Taguchi正交试验方法探讨了沥青基碳纤维纺丝过程中影响纤维直径的纺丝工艺因素及其规律,结果表明:以纺丝温度、纺丝压力、卷筒转速和喷丝孔入口角等4个重要的纺丝工艺条件为考察因素时,卷筒转速是影响中间相沥青基碳纤维直径变化最重要的因素。中间相沥青基碳纤维直径随着喷丝孔入口角的增大而减小;随着纺丝温度的升高而增大;随着转速增大而明显减小。 The Taguchi orthogonal test method was used to investigate the spinning process factors affecting the fiber diameter during the spinning of pitch-based carbon fibers. The results showed that spinning temperature, spinning pressure, An important spinning process conditions for the study of factors, the drum speed is the mesophase pitch-based carbon fiber diameter changes in the most important factor. The diameter of mesophase pitch-based carbon fibers decreases with the increase of the entrance angle of the spinneret, increases with the increase of the spinning temperature, and decreases significantly with the increase of spinning speed.