基于微磁特性的球化质量电磁无损检测  

Electromagnetic non-destructive tesing of spheroidization quality based on micromagnetic property

作　　者：朱胜峰 

机构地区：[1]杭州世宝汽车方向机有限公司,浙江杭州310018

出　　处：《机电工程》2016年第11期1368-1371,共4页Journal of Mechanical & Electrical Engineering

基　　金：浙江省科技计划项目(2015C31058)

摘　　要：针对传统转向节球化质量检测法存在时间长、效率低和操作复杂等问题,对基于初始磁导率法的球化质量无损检测系统进行了研究;通过对铁磁性材料微磁特性的分析,提出了一种基于初始磁导率的电磁无损检测方法;基于电磁场理论和基本方程组,建立了输出感应电压与激励源及磁路参数的数学方程,揭示了输出量与输入量之间的内在关联性;设计出了一套球化质量无损检测系统,对检测系统的电磁传感器、硬件电路及软件系统进行了分析,并将该检测系统应用于灰铸铁和球墨铸铁的实验测试。研究结果表明,灰铸铁测试值约为球墨铸铁测试值的70%;该方法能准确判断转向节是否合格,可实现转向节球化质量在线无损检测。Aiming at solving the problems of taking much time,low efficiency and operating process complex in the detection of spheroidization quality of steering knuckle,a non-destructive detection system of spheroidization quality based on initial magnetic permeability was researched. Through analysed micromagnetic property of ferromagnetic material,an electromagnetic non-destructive detection method based on initial magnetic permeability was put forward. Based on the electromagnetic field theory and basic equations,a mathematical equation among the output induced voltage and the exciting source,parameters of magnetic circuit was established,which was revealed the internal relationship between output quantity and input quantity. A set of detection system of spheroidization quality was designed,and an electromagnetic transducer,a hardware circuit and a software system were analysed,and then the detection system was applied to experimental measurement of the gray cast iron and spheroidal graphite cast iron. The experimental results indicate that the measured value of gray cast iron is about70% of the measured value of spheroidal graphite cast iron. The method can accurately judge the steering knuckle whether is qualified or not,which can realize on-line nondestructive testing for the spheroidization quality of steering knuckle.

关 键 词：初始磁导率 电磁传感器 无损检测 球化质量 

分 类 号：TH878[机械工程—仪器科学与技术] TG115.28[机械工程—精密仪器及机械]