新型超声椭圆振动无心磨削技术  

New Ultrasonic Elliptic Vibration Centerless Grinding Technique

作　　者：范玉峰[1] 唐昆[1] 尹韶辉[1] 朱勇建[1] 吴勇波 

机构地区：[1]湖南大学国家高效磨削工程技术研究中心,长沙410082 [2]日本秋田县立大学

出　　处：《纳米技术与精密工程》2010年第6期484-490,共7页Nanotechnology and Precision Engineering

基　　金：国家重点科技支撑计划资助项目(2007BAF29B03);国家高技术研究发展计划(863计划)资助项目(2006AA04Z335)

摘　　要：本文提出一种以超声椭圆振动板取代传统导轮的新型无心磨削技术,通过对该部件中的压电陶瓷(lead zirconate titanate,PbZrTiO3,PZT)施加交流电压,在该板端面产生超声椭圆振动并控制工件的旋转速度.从振型、激振方式、结构和尺寸等方面,对该超声椭圆振动部件进行了设计,研究了输入信号参数(频率、相位差和电压幅值)与振动部件中金属板端面超声椭圆振动的形状和幅值之间的关系.实验结果表明,该超声椭圆振动板具有良好的性能,其端面的超声椭圆振动能精确控制工件旋转的速度.最后,采用改进后的超声椭圆振动无心磨床对初始直径为1 mm～5 mm的微小圆柱形工件进行了磨削实验.实验结果表明。A novel centerless grinding method using an ultrasonic elliptic vibration shoe instead of the traditional regulating wheel was developed in this paper,in which the end face of the vibration shoe generated an elliptic motion at a high frequency and controlled the rotational speed of the workpiece when the alternative current（AC） voltages were applied to the piezoelectric ceramic device（lead zirconate titanate,PbZrTiO3,PZT）.The ultrasonic elliptic vibration shoe was designed in the respects of vibration mode,excitation method,structure and dimensions.The relationship between the parameters of input signal,such as frequency,phase difference,and voltage amplitude,and the shapes and amplitudes of the ultrasonic elliptic vibration at the end of the shoe was also investigated.Experimental results show that the ultrasonic elliptic vibration shoe had a good performance and the ultrasonic elliptic vibration on the end face of the shoe could control the workpiece rotation precisely.Finally,grinding experiments were conducted on the micro cylindrical workpieces with the initial diameters of 1 mm—5 mm using a modified centerless grinder.Results indicate that the roundness error of the ground workpieces was decreased from 20 μm down to less than 3 μm with the minimum of 0.73 μm and the minimum diameter of the ground workpieces reached 130 μm,which has verified the validity of the proposed new method.

关 键 词：无心磨削 超声椭圆振动部件 压电陶瓷(lead ZIRCONATE titanate PbZrTiO3 PZT) 微小零部件 

分 类 号：TG580.6[金属学及工艺—金属切削加工及机床]