摘要
为研究冲裁工艺对电动机定子铁芯的磁性能影响,采用不同的冲头和冲裁间隙,对无取向电工钢圆片进行冲裁加工,研究在不同冲裁工艺参数下所冲出的电工钢圆环叠片磁性能优劣.通过纳米压痕测试表征了无取向电工钢冲裁边缘的残余应力分布,研究了无取向电工钢磁性能劣化与残余应力分布的关系.结果表明:对比3种不同冲头加工,平冲头冲裁后无取向电工钢叠片磁性能劣化程度最小,凹冲头次之,斜冲头最严重.当冲裁间隙为板厚的5%~20%时,随着冲裁间隙不断增大,无取向电工钢叠片磁性能劣化程度先减小后增大,存在最佳间隙.无取向电工钢叠片的磁性能劣化程度主要与冲裁边缘的残余应力峰值有关,残余应力峰值越大,无取向电工钢叠片磁性能劣化越严重.本研究可为工业无取向电工钢冲裁加工提供参数优化指导.
In order to study the influence of blanking process on the magnetic properties of non-oriented electrical steel lamination,different shapes of punch and different blanking clearances are adopted.The relationship between the magnetic property deterioration and residual stress distribution of non-oriented electrical steel is studied.The results show that the blanking performance of the flat punch is the best,and the concave punch is better than the beveled one.In the considered blanking clearance range(5%~20%of sheet thickness),the magnetic property deterioration of the non-oriented electrical steel lamination decreases at first and then increases with the increasing blanking clearance.There exists an optimal clearance for reducing the magnetic properties deterioration.The magnetic property deterioration of non-oriented electrical steel lamination is mainly related to the peak residual stress.The larger the peak residual stress is,the worse the magnetic properties are.The study can provide parameter optimization guidance for blanking process of non-oriented electrical steel in industry.
作者
王心可
汪喆
崔荣高
李淑慧
WANG Xinke;WANG Zhe;CUI Ronggao;LI Shuhui(Shanghai Key Laboratory of Digital Manufacturing for Thin-Walled Structures,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2019年第9期1115-1121,共7页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金(U1360203)资助项目
关键词
冲裁工艺
无取向电工钢叠片
磁性能测试
残余应力
blanking process
non-oriented electrical steel lamination
magnetic property tests
residual stress
作者简介
王心可(1994-),男,河南省商丘市人,硕士生,主要研究方向为无取向电工钢制造工艺研究;通信作者:李淑慧,女,教授,博士生导师,电话(Tel.):021-34206784;E-mail:lishuhui@sjtu.edu.cn.
