振动辅助抛光装置设计与性能研究

Design and Performance Research of Vibration Assisted Polishing Device

为了解决传统抛光技术及机床在过程中存在的加工效率低、表面质量差、周期性抛光纹理等问题,基于柔性机构理论,采用中心对称的方式,设计一个二维振动辅助装置;基于柔度矩阵法,建立二维振动辅助装置的理论模型。对二维振动辅助装置进行性能测试及有限元仿真。结果表明:此装置的最大行程约为46μm,放大比约为1.21,固有频率约为933 Hz,耦合误差率约为2.5%,最大应力不超过83 MPa,输入刚度为23.52 N/μm,输出刚度为12.29 N/μm。并通过振动辅助加工实验及有限元仿真,证明了振动辅助抛光装置具有改善实际抛光效果的能力。

In order to solve the problems of low processing efficiency,poor surface quality and periodic polishing texture in the traditional polishing technology and machine tools,based on the theory of flexible mechanism,a 2D vibration assisted device was designed by means of central symmetry.Based on the flexibility matrix method,the theoretical model of 2D vibration assisted device was established.The performance test and finite element simulation of the 2D vibration assisted device were carried out.The results show that the maximum stroke of the device is about 46μm,and the amplification ratio is about 1.21,the natural frequency is about 933 Hz,the coupling error rate is about 2.5%,the maximum stress does not exceed 83 MPa,the input stiffness is 23.52 N/μm and the output stiffness is 12.29 N/μm.Through the vibration assisted machining experiment and finite element simulation,it is proved that the vibration assisted polishing device has the ability to improve the actual polishing effect.