基于多尺度结构特征和变异系数整合方法的无取向硅钢片精密冲裁工艺参数优化  

Optimization on precision blanking process parameters for non-oriented silicon steel sheets based on multi-scale structural features and variation coefficient integration method

作　　者：孟毅[1] 汪泽匪 陈强[2] 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)

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]西南技术工程研究所,重庆400039

出　　处：《锻压技术》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)。

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.

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 

分 类 号：TG164.1*1[金属学及工艺—热处理] TG31[金属学及工艺—金属学]