基于微细铣削的微径铣刀振动特性分析  

Analysis of Vibration Characteristics of Micro-diameter Milling Cutter Based on Micro-milling

作　　者：史佳星 金成哲[1] 杨梓荆 Shi Jiaxing;Jin Chengzhe;Yang Zijing(不详;School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学机械工程学院,沈阳市110159

出　　处：《工具技术》2023年第6期90-93,共4页Tool Engineering

摘　　要：在微细铣削超硬铝合金过程中,由于工艺系统刚度较小,机床与微径铣刀的振动不仅会造成切削加工过程中铣刀与工件之间的相对位移,甚至会破坏微径铣刀刀体,影响工件表面质量。通过微径铣刀模态分析得到微径铣刀的振型及固有频率,从而判断铣刀是否与机床发生共振。同时通过谐响应分析获得频谱图中最大振幅对应的频率,从而选择最优的模态振型。研究结果表明:微径铣刀不会与机床发生共振;在考虑X方向的切削稳定性时应该避免激励频率在一阶固有频率附近;在考虑Y方向的切削稳定性时应该避免激励频率在二阶固有频率附近;通过对比有效质量的方法,验证了有限元分析的准确性。In the process of micro-milling superhard aluminum alloys,due to the small stiffness of the process system,the vibration of the machine tool and the micro-milling cutter will not only cause the relative displacement and the workpiece during the cutting process,but even cause the micro-milling cutter body damage,affecting the surface quality of the workpiece.In this paper,through the modal analysis of the micro-milling cutter,the vibration shape and natural frequency of the micro-milling cutter are analyzed to determine whether the milling cutter resonates with the machine tool.And through the harmonic response analysis,the frequency corresponding to the maximum amplitude in the spectrometer is analyzed,so as to select the optimal mode shape.The result of research shows that the milling cutter does not resonate with the machine tool.It is concluded that when considering the cutting stability in the X direction,the excitation frequency should be avoided near the first-order natural frequency.When considering the cutting stability in the Y direction,the excitation frequency should be avoided near the second-order natural frequency.Finally,the accuracy of the finite element analysis is verified by comparing the effective mass method.

关 键 词：微细铣削 微径铣刀 模态分析 谐响应 

分 类 号：TG714[金属学及工艺—刀具与模具] TH161.6[机械工程—机械制造及自动化]