磁粉夹持正压力理论分析和实验研究  

Theoretical Analysis and Experimental Research of Positive Pressure of Magnetic Powder Clamping

作　　者：房连强 周燕飞[1] FANG Lianqiang;ZHOU Yanfei(School of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《机械制造与自动化》2021年第1期89-92,共4页Machine Building & Automation

摘　　要：采用磁粉柔性夹持某些整体结构件、异构件和薄壁件时,磁粉夹持正压力的大小影响着磁粉夹持效果。介绍了磁粉产生夹持力的基本原理,通过将磁粉颗粒简化为磁偶极子模型来分析处于磁场中的磁粉对工件产生的正压力,得出影响磁粉正压力的各种因素,通过实验验证理论分析结论的正确性。研究结果表明:磁粉的目数、磁导率和磁感应强度越大,磁粉对工件的夹持正压力越大。To solve the problems of low efficient clamping on integral structural parts and irregular parts and thin-wall parts in the process of machining,a design scheme of clamping workpiece by placing magnetic powder in magnetic field to generate clamping force was proposed with the introduction of the basic principle of magnetic powder to produce clamping force.By simplifying the magnetic powder particles to the magnetic dipole model,the positive pressure of magnetic powder for the workpiece in the magnetic field was analyzed,and the various factors influencing the positive pressure of magnetic powder were abtained as well.The experiment undertaken afterwords verified the correctness of theoretical analysis.The results show that the larger the mesh number,permeability and induction intensity of the magnetic powder are,and the greater the positive pressure of the magnetic powder on the workpiece is.

关 键 词：磁粉 磁场 夹持 正压力 

分 类 号：TG758[金属学及工艺—刀具与模具] TH122[机械工程—机械设计及理论]