新型电磁永磁振动研磨机理及应用  

The Mechanism and Application of Electromagnetic and Permanent Magnet Vibration Assisted Grinding

作　　者：夏昂 杨斌堂[1] XIA Ang;YANG Bintang(State Key Laboratory of Mechanical System and Vibration,Shanghai Jiaotong University, Shanghai 200240, China)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《噪声与振动控制》2019年第1期238-242,共5页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51775349);民用飞机专项科研资助项目(MJZ-G-2013-03)

摘　　要：通过改进磁力研磨方式,引入高频振动,增大研磨粒子的瞬时压力,可以提高研磨效率和加工质量。针对磁力研磨的加工效率和加工质量问题,引入研磨加工的材料去除模型,可知增大研磨压力能够提高研磨效率。设计一种简单的电磁永磁复合作用的高频振动头,用于辅助磁力研磨,该振动头结构和磁路简单,漏磁少,可方便置于数控机床或者机械臂上实现复杂形面加工。所提出的研磨机理将研磨粒子的纯水平旋转运动变为水平旋转和上下振动的复合运动,材料去除率增高,经体视显微镜观察,相对于原始表面和单纯磁力研磨的表面,表面质量得到明显改善。同时,分析了电磁永磁振动研磨的加工特性。According to the material removal model, the grinding efficiency and quality of magnetic abrasive finishing(MAF) can be improved by increasing grinding pressure. Introducing high-frequency vibration can improve the efficiency of magnetic grinding because the instantaneous pressure of abrasive particles is increased. In this paper, a simple highfrequency vibration head driven by the electromagnetic and the permanent magnetic alternatively is designed to assist magnetic abrasive finishing. This vibration head has a simple mechanical structure and simple magnetic circuit with less magnetic leakage, and can be conveniently placed on CNC machine tools or robotic arm to process complex surface. The vibration head can change the motion state of abrasive particles from simple horizontal rotational motion to a composite motion of horizontal rotation and vertical vibration, therefore the material removal rate is increased. Compared with the original surface and the surface processed by MAF, the surface quality processed by the new method is found to be improved significantly. At the same time, the processing characteristics of the electromagnetic and permanent magnet combined vibration assisted grinding are analyzed.

关 键 词：振动与波 表面粗糙度 振动研磨 磁力研磨 研磨效率 

分 类 号：TB123[理学—工程力学]