基于钴铁氧体的双弯超声椭圆振动切削装置研究-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Research on a Cobalt Ferrite-Based Dual Bending Ultrasonic Elliptical Vibration Cutting Device

作者:: 齐超帅1; 沈志煌1; 尤世聪1; 何雅珏1; 张潘潘1; 黄俊锋2; （1.集美大学海洋装备与机械工程学院，福建厦门 361021；2.泉州市华德机电设备有限公司，福建泉州 362123）

Author(s):: QI Chaoshuai1; SHEN Zhihuang1; YOU Shicong1; HE Yajue1; ZHANG Panpan1; HUANG Junfeng2; (1.College of Marine Equipment and Mechanical Engineering,Jimei University, Xiamen 361021,China;2.Quanzhou Huade Electromechanical Equipment Co.,Ltd.,Quanzhou 362123,China)

Keywords:: dual-bending composite ultrasonic device; cobalt ferrite; modal analysis; magnetic circuit design; elliptical vibration cutting

摘要:: 本文提出了一种钴铁氧体超磁致伸缩材料的双弯超声椭圆振动切削装置设计方法，旨在克服压电陶瓷驱动的易老化、过热失效等问题。基于Timoshenko弯曲梁理论，通过对称式五阶弯振模态复合与节点固定技术，实现了刀尖高精度椭圆轨迹输出，Z/Y方向振动频率差仅7 Hz，满足同频激励要求。装置采用永磁偏置磁场协同设计，结合锰锌铁氧体闭合磁路，匹配精度达92%，工作温度稳定在60 ℃以下。利用ANSYS和COMSOL Multiphysics软件进行动力学与磁路优化，样机测试表明，谐振频率为45.43 kHz，刀尖振幅达1.8 m。变相位差切削实验结果表明，当相位差为60°时，装置加工获得的表面粗糙度最低（较普通切削减低57%)，且加工表面规则均匀，无明显缺陷。

Abstract:: This study proposes a design method for a dual-bending ultrasonic elliptical vibration cutting (UEVC) device based on cobalt ferrite giant magnetostrictive material,aiming to overcome the issues of aging and overheating failure associated with piezoelectric ceramic actuation.Based on Timoshenko beam bending theory,a high-precision elliptical trajectory output at the tool tip was achieved through a symmetrical fifth-order bending vibration mode combination and nodal fixation technique.The frequency difference between the Z and Y directional vibrations was only 7 Hz,meeting the requirements for synchronous frequency excitation.The device employs a permanent magnet bias field in a collaborative design,combined with a manganese zinc ferrite closed magnetic circuit,achieving a magneto-mechanical coupling coefficient of 92% and maintaining a stable operating temperature below 60 ℃.Dynamic and magnetic circuit optimizations were conducted using ANSYS and COMSOL Multiphysics software.Prototype testing revealed a resonance frequency of 45.43 kHz and a tool tip amplitude of 1.8 μm.Phase-shift cutting experiments confirmed that at a phase difference of 60°,the surface roughness was minimized,reducing by 57% compared to that from the conventional cutting,with a uniform and defect-free machined surface.