Abstract This article presents a theoretical method to analyze the dynamic behavior of the milling process of the pocket-shaped thin-walled workpieces, which are filled with viscous fluid to suppress the chatter vibrations. Dynamic models of both the spindle-tool system and the pocket-shaped thin-walled workpiece with the viscous fluid are derived by extending the principles of the fluid-structure interaction dynamics theory and structural mechanics. The in-process dynamical parameters of the tool and the workpiece, i.e. natural frequency and modal shape, are solved by comprehensively integrating the effects of the viscous fluid, material removals, and tool position changes. Based on the built models, a method for analyzing the machining stability of this kind of workpieces after using the viscous fluid in the milling process is carried out and the avoidance principle of chatter vibrations is established by reasonably selecting the cutting parameters. A series of simulation and experimental tests are conducted on a typical pocket-shaped thin-walled workpiece to verify the reliability and effectiveness of the proposed methods for the suppression of chatter during the whole milling process.

中文翻译：

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带粘性流体的袋形薄壁工件铣削颤振分析与缓解

摘要 本文提出了一种理论方法来分析口袋形薄壁工件的铣削过程动态行为，这些工件充满粘性流体以抑制颤振。通过扩展流固耦合动力学理论和结构力学原理，推导出主轴-刀具系统和带有粘性流体的袋形薄壁工件的动力学模型。刀具和工件的过程动态参数，即固有频率和模态形状，通过综合集成粘性流体、材料去除和刀具位置变化的影响来求解。根据构建的模型，提出了一种分析该类工件在铣削过程中使用粘性流体后加工稳定性的方法，通过合理选择切削参数，建立了避免颤振的原则。在典型的袋形薄壁工件上进行了一系列仿真和实验测试，以验证所提方法在整个铣削过程中抑制颤振的可靠性和有效性。