08060416-高速磨床电主轴振动特性的实验研究和磨床发展方向.docVIP

先进制造技术课程论文 Advanced manufacturing technology class paper 班级：08营 姓名：史海廷 学号：0座机电话号码 高速磨床电主轴振动特性的实验研究High-speed grinding machine electric spindle vibration characteristics of experiment research, grinder development direction Abstract This paper introduces high speed precision linear motor drive electric experimental grinder spindle for grinding, servo stiffness adjustment methods, analyzed the electric spindle a wheel connect high-speed bar system caused vibration reasons and puts forward the improving method, and good results have been achieved. In order to improve the grinding wheel linear, realize high speed precision grinding machining, grinding wheel drive and bearing of speed demanding. Electric spindle unit adopts of built-in type direct drive motor spindle. Electric spindle unit has good rigidity, rotating high precision, small temperature, good stability, low power dissipation and advantages of long life, at high speed precision grinding machine has a broad prospect of application. Motorized spindle speed generally in 10 000r/min above, some even reach 60 000-100000r/min, so grinding wheel spindle system even if there is a small balabcing, also can produce very big centrifugal force, causing severe vibration machine, affect machining precision and surface quality and even damage grinding wheel and the spindle. Therefore for grinding wheel spindle system dynamic characteristics and a dynamic balance technology research is more and more attention. Key words：High-speed grinding machine Experimental analysis influence Vibration testing Development trend 引言：本文系统的介绍了高速磨床在工厂生产中的应用，以及高速磨床发展演变的历史，从不先进到现今，从低端到高端的过程。还有的就是介绍了高速磨床的性能，作用及特点。 一、振动测试系统 1．主轴横向进给伺服刚度的调节 本磨削系统的高速电主轴是安装在直线电机的转子之上的，通过PMAC（可编程多轴控制器）控制直线电机带动电主轴实现高频往复运动，从而实现非圆截面的精密加工。 直线电机初、次级之间的间隙一般比旋转电机的气隙大2~3倍，且并非一个封闭的整体，其间存在很大的吸引力，这对直线电机控制系统要求很高。若直线电机在高速高频进给时没有很高的伺服刚度，则在带动电主轴一砂轮系统进给磨削时将产生很大的矢动量，且不能抑制电主轴高速运转引起的振动。 本实验磨床的直线电机通过PMAC的伺服控制环调整PID参数，使直线电机达到伺服刚度高、稳定性好、跟随误差小，对电主轴自身引起的振动有很好的抑制作用，可避免由于振动引起的定位误差，进而带动电主轴实现