摘要
采用不同冲裁间隙(10、20和30μm)和冲裁速率(0.1、1、10和100 mm·s^(-1))对厚度为0.3 mm的无取向硅钢片开展了精密冲裁试验,并使用共聚焦显微镜、扫描电子显微镜和电子背散射衍射对无取向硅钢片冲裁断口的截面各部分长度、表面粗糙度、晶粒取向等宏微观多尺度结构特征进行了定量分析,探究了冲裁间隙和冲裁速率对无取向硅钢片的冲裁成形性能以及冲裁成形质量的影响规律。并提出了一种基于变异系数和理想解相似性排序技术相结合的评估模型,综合评价了冲裁工艺参数对厚度为0.3 mm的无取向硅钢片精密冲裁产品质量的影响,为优化冲裁工艺提供了重要的理论指导,对于提高先进电动机关键构件的制造质量具有重要意义。
The precision blanking experiments of non-oriented silicon steel sheets with the thickness of 0.3 mm were conducted under different blanking clearances(10,20 and 30μm)and blanking rates(0.1,1,10 and 100 mm·s^(-1)),and the macro and micro multi-scale structural features such as the length of each part of the fracture cross-section,surface roughness and grain orientations for the blanked fracture of non-oriented silicon steel sheets were quantitatively analyzed by confocal microscopy,scanning electron microscopy and electron backscatter diffraction.Then,the influence laws of blanking clearances and blanking rates on the blanking formability and blanking forming quality of the non-oriented silicon steel sheets were studied,and an evaluation model combining the variation coefficient and the technique for order of preference by similarity to ideal solution(TOPSIS)was proposed to comprehensively assess the influence of blanking process parameters on the quality of precision blanked products for non-oriented silicon steel sheets with the thickness of 0.3 mm,which provides important theoretical guidance for optimizing the blanking process and has significant importance for improving the manufacturing quality of critical components for advanced electric motors.
作者
孟毅
汪泽匪
陈强
Meng Yi;Wang Zefei;Chen Qiang(College of Materials Science&Engineering,Chongqing University,Chongqing 400044,China;Southwest Technology and Engineering Research Institute,Chongqing 400039,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2024年第7期112-121,178,共11页
Forging & Stamping Technology
基金
国家自然科学基金区域创新发展联合基金(U21A20133)。
关键词
无取向硅钢片
精密冲裁成形
多尺度结构特征
冲裁间隙
冲裁速率
non-oriented silicon steel sheets
precision blanking
multi-scale structural features
blanking clearance
blanking rate
作者简介
孟毅(1983-),男,博士,教授,E-mail:mengyi@cqu.edu.cn;通信作者:陈强(1981-),男,博士,教授级高工,E-mail:2009chenqiang@163.com。
