中北大学信息商务学院 外文翻译精镗中的摩擦阻尼器学生： 学号： 12024243X01 系 别： 机械工程系专 业： 机械设计制造与其自动化指导老师： 职称： 副教授 2024 年 6 月 2 日Stabilization of high frequency chatter vibration in fine boring by friction damperAbstractMachining performance such as that of the boring process is often limited by chatter vibration at the tool-workpiece interface. Among various sources of chatter, regenerative chatter in cutting systems is found to be the most detrimental. It limits cutting depth (as a result, productivity), adversely affects surface finish and causes premature tool failure.The new damper is characterized by simple structure that consists of an additional mass attached to the main vibrating structure with small piece of permanent magnet. The principle is straightforward in which Coulomb and viscous frictions dissipate vibration energy at the interface between the damper and main vibrating structure. The damper needs no tuning, and is effective at high frequency. The paper first introduces a typical design of the friction damper with experimental proof by cutting tests of its effectiveness in eliminating the high frequency chatter in fine boring, and assuring normal tool life of the cutting edge. Theoretical and experimental analyses are introduced for understanding the fundamental principle and characteristics of the new damper. The new damper is effective for boring tools, which vibrate at frequency more than 5,000Hz.Keywords:High frequency chatter; Friction damper; Fine boring.1. Introduction Chatter in metal cutting process, in general, is the result of both forced and self-excited vibrations. Forced vibration is due to the unbalance of rotating members, such as unbalanced driving system...
