超磁致伸缩微驱动车削刀架及其可行性研究  

Turning Tool Holder of Giant Magnetostrictive Microdrive and Its Feasibility Study

作　　者：吴雁 何勇 宋浩然 方紫韵 李振武 刘旭辉 WU Yan;HE Yong;SONG Haoran;FANG Ziyun;LI Zhenwu;LIU Xuhui(School of Mechanical Engineering,Shanghai Institute of Technology,Shanghai 201418,China;Shanghai Yuanhe Mechatronics Co.,Ltd.,Shanghai 201103,China)

机构地区：[1]上海应用技术大学机械工程学院,上海201418 [2]上海缘赫机电科技有限公司,上海201103

出　　处：《机床与液压》2022年第8期47-51,共5页Machine Tool & Hydraulics

基　　金：上海市科委地方院校能力建设项目(20090503000)。

摘　　要：针对现有的超磁致伸缩微驱动的车削刀架存在输出位移小、稳定性差等问题,设计一种应用于主动控制车削颤振车削刀架的新型超磁致伸缩驱动器(GMA)。基于ANSYS仿真软件探究开闭合磁路状态下GMM棒磁场强度以及分布情况,并搭建GMA动态位移特性测试系统研究电流频率和预压力大小对GMA输出特性的影响。研究结果表明:闭合磁路状态通过GMM棒的平均磁场强度更高且均匀性较好;在预压力一定时,GMA的动态输出位移峰峰值与输入电流频率呈负相关;在预压力为300 N时,GMA的动态输出位移峰峰值达到最大值为45μm。仿真和实验结果说明所提出的新型GMA可以稳定输出动态位移,满足主动控制车削颤振的激励频率及最大动态输出位移的需要,所设计的超磁致伸缩微驱动车削刀架是完全可行的。Aiming at the problems of small output displacement and poor stability of existing giant magnetostrictive micro-drive turning tool holder, a new type of giant magnetostrictive actuator(GMA) for active control of the turning chatter turning tool holder was designed. Based on ANSYS simulation software, the magnetic field intensity and distribution of the GMM rod under the state of open and closed magnetic circuits were explored, and a GMA dynamic displacement characteristic test system was built to study the influence of current frequency and preload on the GMA output characteristics. The research results show that the average magnetic field strength through the giant magnetostrictive rod in the closed magnetic circuit state is higher and the uniformity is better;when the pre-pressure is constant, the peak-to-peak value of the dynamic output displacement of the GMA is negatively correlated with the frequency of the input current;when the pre-pressure is 300 N, the peak-to-peak value of the dynamic output displacement of GMA reaches the maximum value of 45 μm. The simulation and experimental results show that the proposed new GMA can stably output dynamic displacement and meet the needs of actively controlling the excitation frequency and maximum dynamic output displacement of turning chatter. The designed giant magnetostrictive micro-drive turning tool holder is completely feasible.

关 键 词：超磁致伸缩驱动器 预压力 电流频率 输出位移峰峰值 

分 类 号：TH16[机械工程—机械制造及自动化]