为揭示碳纤维增强复合材料（CFRP）切削温度在纤维方向角θ影响下的变化规律，采用直角自由切削方式对CFRP单向层合板切削温度进行了试验研究，试验共考虑0°-180°12种θ角。研究结果表明：CFRP切削温度在θ影响下表现出极强的各向异性，顺纤维方向下（θ<90°）的切削温度明显高于逆纤维方向（θ>90°），θ=90°时切削温度取得最大值；第一、二变形区大量切削热被粉末状切屑带走，切削温度主要由切深抗力主导的第三变形区摩擦热所贡献。基于CFRP直角自由切削试验结果，对切削温度进行了预测和验证：利用傅立叶热传导定律对切削温度进行建模，模型考虑了CFRP层合板弹性回复对后刀面接触长度的影响，并在模型中引入参数θ及考虑CFRP层合板各向异性影响的等效刚度，建立了不同纤维方向角下CFRP单向层合板直角自由切削温度预测模型。模型最大预测误差不超过5.5%。

To reveal new knowledge of the cutting temperature when cutting carbon fiber reinforced composites (CFRP) under the influence of fiber orientation angle (θ), experimental study on cutting temperature were conducted in orthogonal cutting of CFRP unidirectional laminates. Twelve different angles, from 0 ° to 180 °, were employed in this study. The results show that cutting temperature has strong anisotropy under the influence of θ. Cutting temperature, along the fiber orientation (θ<90 °), is significantly higher than that along the inverse fiber orientation (θ> 90 °) and the maximum cutting temperature is reached when using θ= 90 °. Most of the cutting heat, generated in the first and second deformation zone, has been taken away by powdered chips. Cutting temperature is mainly contributed by cutting heat generated in the third deformation zone, which is dominated by the resistance towards depth of cut. Cutting temperature was predicted and verified based on the results of the experiment. Using Fourier's law of heat conduction, modeling of cutting temperature was carried out considering the spring-back effect of CFRP unidirectional laminates on the contact length between the flank surface and the workpiece. Fiber orientation angle and the equivalent stiffness, considering the anisotropy of CFRP unidirectional laminates, were introduced into the model. A prediction model for cutting temperature under different fiber orientation angle is established in orthogonally cutting of CFRP unidirectional laminates. The maximum prediction error is less than 5.5%.