Chatter in the cutting process has a great influence on workpiece surface quality, machining efficiency, and service life of the machine tool. This work presents three degrees of freedom (DOF) dynamic model applied to tool chatter for thin-walled structures in milling. Combined with dynamic cutting force modelling in the radial, axial and tangential directions, the stability chart was solved by adopting an improved semi-discretization method in time domain. And the stability prediction model considering regenerative effect was validated by cutting tests with specific axial depth of cut and spindle speed. The cutting experimental results performed at different axial depth of cuts were in accordance with predicted stability lobe diagram (SLD). Moreover, the effects of cutting contact angle and radial immersion ratio on SLD were also analyzed. The study results show that the dynamic model could make a good prediction of chatter stability, and the established approach is high efficient in predicting the chatter stability lobe considering the actual situation.

切削过程中的颤动对工件表面质量，加工效率和机床的使用寿命有很大影响。这项工作提出了三个自由度（DOF）动力学模型，适用于铣削薄壁结构的刀具颤动。结合径向，轴向和切线方向的动态切削力建模，通过采用改进的时域半离散化方法来求解稳定性图。并通过切削试验确定了具有再生效应的稳定性预测模型，该切削试验具有特定的轴向切削深度和主轴转速。在不同的轴向切削深度处进行的切削实验结果均符合预测的稳定性凸瓣图（SLD）。此外，还分析了切削接触角和径向浸入比对SLD的影响。