【摘要】：车削加工过程中发生的振动，会使工件的加工面出现振纹，降低工件表面的加工质量，减少刀具的使用寿命。因此研究车削振动有重要的工程意义。利用数控机床、振动信号采集仪、振动信号分析软件以及压电式三向加速度传感器，搭建试验系统，进行车削试验，研究车削深度对车刀三向振动时域特性的影响。研究表明：（1）给定主轴转速及进给速度，随着车削深度的增加，三种刀具在径向、切向和轴向三个方向上的车削振动加速度的极值、均方根值曲线的变化规律相似；（2）给定主轴转速及进给速度，随着车削深度从0.3mm增加到0.8mm，三种车刀三向振动加速度最大值先增大后减小，且在车削深度为0.5mm时，车刀车削振动加速度最大值较大，振动较为剧烈；（3）与其他的主轴转速相比，主轴转速1600r/min时，初等磨损刀具径向上的车削振动加速度均值始终为负值，且受车削深度影响较大；（4）主轴转速800r/min时，严重磨损刀具径向上的车削振动加速度均值始终为负值，且受车削深度影响较小。39792
【毕业论文关键词】：车削；刀具三向振动；车削深度；时域分析；试验研究
Experimental Design of Effect of Cutting Depth on Time-domain Characteristic of Tool Three-dimensional Vibration
【Abstract】:Because vibration occurs in the turning process,and vibration makes the surface of workpieces appear chatter and reduces the quality of workpiece surface and the tool life.So it is important to study the turning vibration.Using numerical control machine,vibration signal acquisition,vibration signal analysis software and piezoelectric three-acceleration sensor build the test system then carried out turning test,studying the effect of turning depth on vibration characteristics of time domain to tool three.Research shows that:(1)Given the spindle speed and feed rate,with the increase of cutting depth,radial,tangential and axial direction of turning vibration acceleration of three tools are similar among each other;(2)Given the spindle speed and feed rate,with turning depth from 0.3mm to 0.8 mm,the maximum of vibration acceleration of three tools increases first and then decreases,and in turning depth 0.5mm,the maximum of turning vibration acceleration is larger and vibration is more intense;(3)Compared with the other spindle speeds,in the spindle speed 1600r/min,the average value of turning vibration acceleration of the primary wear tool is always negative and the turning depth has a greater impact on mean curve;(4)When the spindle speed is 800r/min,the average value of turning vibration acceleration of the severely worn cutter is always negative,and the turning depth has less effect on that.
【Keywords】:Turning；Tool three-dimensional vibration;Cutting depth;Time domain analysis;Experimental study
 目录
摘要    1
1 绪论    3
1.1研究意义    3
1.2研究现状    3
1.3研究内容    5
1.4研究方法和技术路线    5
2 振动理论与测试基础    7
2.1机械振动原理    7
2.2机械振动分类及其特点    7
2.3振动测量参数    7
2.4振动测量传感器与放大器    8
2.4.1惯性测振传感器    8
2.4.2非接触式传感器    8
2.4.3传感器的选择原则    8
2.4.4选取传感器    9
2.4.5常用的测振放大器    12
2.5  振动信号采集仪    12
2.6振动信号时域分析理论    13
2.6.1时域统计分析    14
2.6.2直方图分析    15
2.6.3时域相关分析    17 车削深度对车刀三向振动时域特性影响的试验设计:http://www.youerw.com/jixie/lunwen_40471.html