基于有限元分析的椭圆振动切削换能器

通过分析纵向振动换能器的传统模型,设计出一种在结构不对称情况下,单向激励产生椭圆振动的理论等效模型,利用有限元分析工具对换能器的等效模型进行动力学和静力学分析,对换能器的尺寸进行优化设计,使换能器的谐振频率和振动模态达到较为理想的状态,在此基础上研制出一套单激励超声椭圆振动车削系统,并且利用人造多晶金刚石(PCD)刀具进行了超声椭圆振动切削试验,得到了比较好的加工质量,验证了有限元分析的方法对换能器设计在参数优化和振动形式分析方面有实际的指导意义,同时也说明椭圆振动切削能够有效的提高加工质量.

Transducer of the ultrasonic elliptical vibration cutting based on the finite element method

An asymmetrical structural model of the ultrasonic elliptical vibration transducer only with the longitudinal animation was presented through analyzing the model of the longitudinal vibration transducer. Based on the modal and static analysis of the finite element method, the various parameters of the model were modified to meet the needs of the vibration modality and the inherent frequency. A system of the ultrasonic elliptical vibration cutting with the single longitudinal animation was developed. The surface finish with high quality can be achieved by the ultrasonic elliptical vibration cutting with a polycrystalline diamond (PCD) tool. It is proved that the ultrasonic elliptical vibration transducer can be rational designed with the finite element methods in respects of parameter optimization and modal analysis. At the same time, the ultrasonic elliptical vibration cutting can improve the quality of the surface finish effectively.