表面微坑超声振动加工系统负载调频特性研究  

Characteristics of Ultrasonic Vibration Machining System of Surface Micro-Pits with Load Modifying Frequency

作　　者：成志婕 王建青[1] 祝锡晶[1] 周雯雯 CHENG Zhi-jie;WANG Jian-qing;ZHU Xi-jing;ZHOU Wen-wen(School of Mechanical Engineering North University of China,Shanxi Taiyuan 030051,China)

机构地区：[1]中北大学机械工程学院,山西太原030051

出　　处：《机械设计与制造》2021年第6期111-114,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金(51975540);先进制造技术山西省重点实验室基金(XJZZ201707);中北大学第十六届研究生科技立项(20191610)。

摘　　要：表面微坑超声振动加工技术对于改善缸套—活塞环摩擦副的摩擦润滑状态具有重要意义。针对表面微坑超声振动加工过程中谐振频率随负载漂移的问题,建立微坑加工等效负载与换能器谐振频率和调谐电感的关系模型,通过仿真和试验验证研究了外加负载变化时,谐振频率与调谐电感值的变化规律。结果表明,随着外加工具杆长度增加,换能器谐振频率呈下降趋势;通过在回路中串联一个调谐电感,补偿负载的变化量,可使换能器谐振频率回到设计谐振频率。可见外加调谐电感可有效解决表面超声微坑振动加工过程中谐振频率随负载漂移的问题。The ultrasonic vibration machining technology of surface micro-pits is of great significance for improving the frictional lubrication state of the cylinder liner—piston ring friction pair.Aiming at the problem that the resonant frequency varies with the load during the ultrasonic vibration machining of the surface micro-pits,the relation model of the resonant frequency and tuned inductance of the equivalent load of the micro-pits machining is established,and the variation law of the resonant frequency and tuned inductance is studied through simulation and experiment verification.The results show that the resonant frequency of the transducer decreases with the increase of the length of the tool bar.By adding tuned inductance to compensate the change of load,the resonant frequency of transducer can be returned to the designed resonant frequency.It can be seen that the external tuned inductance can effectively solve the problem of the resonant frequency drifting with the load during the surface micro-pit vibration machining.

关 键 词：微坑加工 负载 超声换能器 频率漂移 调频 

分 类 号：TH16[机械工程—机械制造及自动化] TG663[金属学及工艺—金属切削加工及机床]