超声振动切削钛合金振动信号及表面结构分析  

Ultrasonic vibration cutting titanium alloy vibration signal and surface structure analysis

作　　者：党迪 吕志杰[1] 薛磊 孙中阳 DANG Di;LYU Zhijie;XUE Lei;SUN Zhongyang(School of Mechanical and Electrical Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学机电工程学院,山东济南250101

出　　处：《山东建筑大学学报》2023年第6期70-77,共8页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(51375281)。

摘　　要：超声振动切削作为一种先进的加工方法,常用于钛合金等难加工材料的加工中,分析超声振动切削对切削过程中振动信号及已加工面表面结构的影响可为后续研究提供参考。利用有限元软件ABAQUS建立二维切削有限元模型,仿真了普通切削及不同振幅的径向、切向超声振动切削,并依据其结果选择最优超声振动切削方案展开试验,研究切削过程中振动信号及已加工面表面结构的变化。结果表明:振幅为10μm的径向超声振动切削优势明显,最大冯·米塞斯应力(Von Mises Stress)降低了6%,平均主切削力降低了11%;径向超声振动切削能够减小主轴回转及刀架固有频率引起的振动约为22%;已加工表面原始轮廓的极差约降低了23%。Ultrasonic vibration cutting,as an advanced machining method,is commonly applied in the machining of challenging materials such as titanium alloy.Analyzing the influence of ultrasonic vibration cutting on the vibration signal and the surface structure of the machined surface during the cutting process can provide valuable insights for subsequent research.Utilizing the finite element software ABAQUS,a two-dimensional cutting finite element model was established to simulate conventional cutting and radial and tangential ultrasonic vibration cutting with different amplitudes.Based on the simulation results,the optimal ultrasonic vibration cutting scheme was selected for the experiment,focusing on the changes and in vibration signals and the surface structure of the machined surface during the cutting process.The results indicate that radial ultrasonic vibration cutting with an amplitude of 10μm exhibits obvious advantages,with a 6%reduction in maximum Von Mises Stress and an 11%decrease in average main cutting forces.Radial ultrasonic vibration cutting effectively reduces vibrations caused by spindle rotation and tool holder inherent frequency by approximately 22%.Furthermore,the extreme difference(maximum minus minimum)of the original contour of the machined surface is reduced by about 23%.

关 键 词：超声振动 钛合金 切削振动信号 表面结构 数值仿真 

分 类 号：TH161[机械工程—机械制造及自动化]