数控铣削过程中工件的振动测试及分析  

Testing and analysis on the work-piece vibration in numerical control milling process

作　　者：李顺才[1] 张彬彬[1] 刘玉庆[2] 

机构地区：[1]徐州师范大学机电工程学院,江苏徐州221116 [2]中国矿业大学力建学院,江苏徐州221008

出　　处：《徐州师范大学学报（自然科学版）》2011年第4期67-70,共4页Journal of Xuzhou Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50974107);江苏省"青蓝工程"基金资助项目(10QLD006);徐州师范大学第十一届本科生科研立项项目(xskt20110302)

摘　　要：利用振动信号分析仪及加速度传感器,通过锤击法得到了加工系统在铣削前后的固有频率;测试了数控铣床在不同主轴转速的铣削过程中工件的振动响应,得到了工件振动加速度信号的时域曲线及自功率谱密度曲线.研究表明:1)随着主轴转速的降低,工件振动的自功率谱密度值减小,铣削振动的最大能量是最小值的4.3倍;2)随着主轴转速的降低,工件高频振动的时间缩短,当转速降低到某一值时高频振动消失.铣削过程中工件振动的最高频率是最低频率的11.7倍.By the vibration signal analyzer and the acceleration sensor,the natural frequency of the machining system before milling has been obtained by the hammering method,and the vibration responses of the work-piece in the milling process with different rotational speeds are tested on numerical control milling machine.Moreover,the time domain curves and the self-power spectral density curves of the acceleration signals of the work-piece vibration are obtained.The study indicates that：1） with the decrease in rotational speed,the self-power spectral density of the work-piece vibration decreases and the maximum vibration energy in milling process is four times of the minimum value;2） with the decrease in rotational speed,the time of high-frequency vibration of the work-piece reduces and the high-frequency will disappear when rotational speed reduces to a certain value.By the tests,the maximum frequency of the work-piece in the milling process is twelve times of the minimum one.

关 键 词：数控铣床 铣削 振动响应 测试 自功率谱密度 

分 类 号：O343.1[理学—固体力学] TG713.3[理学—力学]