航空铝合金7050-T7451干式铣削工艺参数对振动信号影响研究  

Effects of Process Parameters on Vibration Signals in Dry Milling of Aeronautic Aluminum Alloy 7050-T7451

作　　者：仲为武[1] 赵东标[1] 王希[2] 于晖[2] 

机构地区：[1]南京航空航天大学,南京210016 [2]南昌航空大学,南昌330063

出　　处：《中国机械工程》2011年第4期458-461,503,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50875120)

摘　　要：为了研究不同工艺条件对干式切削加工过程的影响,建立了一套信号采集系统。通过该系统采集了航空铝合金干式铣削过程的振动信号,并从时域、频域角度对其进行了分析研究。研究结果表明：干式铣削过程的振动主要来自于铣削过程固有的间断切削产生的强迫振动,铣削振动信号具有准周期性;振动信号的均方根（RMS）值与主轴转速、每齿进给量、铣削宽度呈复杂的非线性关系;振动信号的能量主要集中在0~20kHz的三个频率带内,信号在这三个频率带内的能量百分比随工艺参数的变化而变化。In order to study the influences of process parameters on dry cutting process,a signal acquisition system was set up to sample vibration signals in dry milling process.The sampled data were analyzed in time domain and frequency domain.The results show that：vibration in dry milling is mainly caused by forced vibration,which is inherent in milling process because of the intermittent cutting;RMS value of vibration signals has complex non-linear relationship with cutting speed,feed per tooth and radial depth of cut;frequency components of vibration signals mainly concentrate in three bands in 0~20kHz,and changes of processing parameters result in change in energy ratios of the three bands.

关 键 词：干式铣削 振动信号 均方根(RMS) 小波包变换 工艺参数 

分 类 号：TH161.6[机械工程—机械制造及自动化] TG506.9[金属学及工艺—金属切削加工及机床]