不同磨损状态下刀具车削振动特性试验研究  

Experimental study on vibration characteristics of cutting tools under different wear states

作　　者：袁冠雷 李顺才[1] 杨睿[1] 吴明明[1] 

机构地区：[1]江苏师范大学机电工程学院,江苏徐州221116

出　　处：《江苏师范大学学报（自然科学版）》2016年第1期76-78,共3页Journal of Jiangsu Normal University：Natural Science Edition

基　　金：江苏省研究生科研创新计划项目(kylx_1433);江苏省大学生实践创新训练计划项目(201410320033)

摘　　要：对3种磨损状态的刀具进行车削试验,利用振动测试系统、压电式三向加速度传感器及Vib'SYS振动分析系统,采集车削刀具的振动信号,分析信号的时域和频域特征,研究3种刀具各向振动的加速度最大值和自功率谱密度均值随主轴转速的变化规律.研究表明:1)初期磨损和正常磨损的刀具振动特征值随主轴转速的变化规律相似,呈现先增大后降低的趋势;2)严重磨损刀具的振动特征值随主轴转速的增加而不断增大;3)不同磨损状态的刀具沿工件径向所受冲击最大,而振动能量主要沿轴向分布.By turning test on three cutting tools with different wear states and by means of vibration test system,the three-dimensional piezoelectric acceleration sensor and the Vib＇SYS vibration analysis system,the vibration signal of the cutting tools are acquired.By analyzing the time domain and frequency domain characteristics of vibration signal,the change law of characteristics values such as the maximum acceleration and the self power spectral density mean of three-dimensional vibration with the spindle speed are studied.The research results show that：1）the change laws of the tools vibration characteristics with the main shaft speed are similar for the early wear tool and normal wear tool,which shows a trend of increasing at first and then decreasing;2）vibration characteristic value of severe wear tool constantly increases with the spindle speed;3）tools of different wear states suffered the maximum impact in the radial direction,and the vibration energy is mainly distributed in the axial direction.

关 键 词：车削刀具 三向振动 自功率谱 时域分析 频域分析 

分 类 号：TG71[金属学及工艺—刀具与模具]