Terfenol-D棒磁致伸缩特性及可加工性能研究  

Magnetostrictive property and machinability of Terfenol-D rod

作　　者：司朝润[1,2] 张贤杰[1,2] 唐兴龄[2] 王俊彪[1,2] 

机构地区：[1]西北工业大学陕西省数字化制造工程技术研究中心,西安710072 [2]西北工业大学机电学院,西安710072

出　　处：《功能材料》2014年第17期17120-17124,共5页Journal of Functional Materials

摘　　要：Terfenol-D中磁致伸缩应变与磁场强度关系的非线性,影响了磁致伸缩控制元件的精度和稳定性。拟采用轴向开槽的方式降低Terfenol-D棒由于涡流损耗产生的热致变形。但是由于材料本身的物理特性,Terfenol-D棒体加工难度很大。为对Terfenol-D材料的加工性能进行研究,选用了线切割和精密磨削两种方式对Terfenol-D棒进行开槽处理,结果表明线切割后加工表面虽然有一定的剥落凹坑产生,但对棒体的磁致伸缩特性影响较小。Terfenol-D棒开槽前后伸缩量测试结果表明在棒体表面开4轴向槽可以降低材料的涡流损耗,提高输出位移-磁场强度关系的线性度。The non-linear relationship between the magnetostrictive strain and magnetic field intensity will affect the precision and stability of the actuator.This paper tries to reduce the eddy current loss in the Terfenol-D rod to improve linearity by machining radial grooves in the surface of the rod.The Terfenol-D rod was extremely difficulty to machine because of its brittleness.Wire-electrode cutting and precision grinding were preliminary chosen for the slotting,and the experimental results show that although the flake pits will be produced in the machining surface of wire-electrode cutting,the magnetostrictive property of Terfenol-D rod slotted was less affected comparing with precision grinding.The tests of the magnetostrictive strain in the Terfenol-D rod show that the eddy current loss was reduced and the linearity of output displacement was significantly improved by slotting 4 radial grooves in the rod surface.

关 键 词：Terfenol-D棒 磁致伸缩 线性度 

分 类 号：TP211.53[自动化与计算机技术—检测技术与自动化装置]