The tuned mass damper (TMD) has been used in machining processes for reducing forced vibration, suppressing chatter, and improving machined surface quality. In micro-milling process, the tiny size of the cutting tool-tip and the high rotating speed bring challenges in implementing the TMD. Besides, the TMD needs to have two degrees-of-freedom (DOFs) for reducing vibrations of micro-mill in two orthogonal directions. This paper presents the chatter suppression for micro-milling by attaching a two-DOF TMD to the tool shank and rotates with the cutting tool. The frequency response function (FRF) at the tip of the micro-mill clamped by an aerostatic spindle is predicted using receptance coupling analysis. A two-DOF TMD is designed via graphical approach based on the FRF result at the tool-tip. The natural frequencies and damping ratio of the TMD are optimized under different spindle speeds in order to enhance the cutting stability. The chatter stability of micro-milling is predicted considering the gyroscopic and centrifugal effects of the TMD structure. Modal tests and micro-milling experiments are conducted to validate the effect of the TMD on chatter stability. The results show that the TMD is able to improve the critical depth of cut by 13 folds, and satisfy the compact design requirement for micro-milling.

调谐质量阻尼器（TMD）已用于加工过程中，以减少强制振动，抑制震颤并改善加工表面质量。在微铣削过程中，切削刀尖的微小尺寸和高转速为实现TMD带来了挑战。此外，TMD需要具有两个自由度（DOF），以减少微型轧机在两个正交方向上的振动。本文介绍了通过在刀具柄上附加两自由度TMD并随切削工具旋转来抑制微铣削的颤动。使用接受耦合分析预测由气动主轴夹紧的微型磨机尖端的频率响应函数（FRF）。根据工具提示中的FRF结果，通过图形化方法设计了两自由度TMD。为了提高切削稳定性，TMD的固有频率和阻尼比在不同的主轴转速下进行了优化。考虑到TMD结构的陀螺和离心效应，可以预测微铣削的颤动稳定性。进行模态测试和微铣削实验以验证TMD对颤振稳定性的影响。结果表明，TMD能够将切削的临界深度提高13倍，并且满足微铣削的紧凑设计要求。