分区域软模调控对Al1060板材胀形过程变形行为的影响  

Influence of subregional flexible-die control on deformation behavior of Al1060 sheet during bulging process

作　　者：王朋义 王育聪 万戈辉 左鹏 金一淳 WANG Peng-yi;WANG Yu-cong;WAN Ge-hui;ZUO Peng;JIN Yi-chun(College of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi′an 710021,China)

机构地区：[1]陕西科技大学机电工程学院,陕西西安710021

出　　处：《塑性工程学报》2024年第7期15-20,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51805309);陕西省教育厅科学研究计划项目(22JP010);陕西省自然科学基础研究计划项目(2023-JC-YB-379);陕西省重点研发计划(2023KXJ-060)。

摘　　要：针对传统软模成形中软模性能整体调控与零件不同变形区域差异化需求的矛盾,采用磁流变液作为成形软模材料,在分区域软模调控下对Al1060板材开展了软模胀形试验与模拟研究,重点关注了中心主导磁场和边缘主导磁场对板材变形行为的影响。结果表明,采用分区域软模调控的方法可显著改变板材胀形过程中的变形行为。中心主导磁场下试件椭圆度为0.85,破裂位置位于磁场突变处,应变最大值出现在半径约10 mm位置;边缘主导磁场下试件椭圆度为0.47,破裂位置则位于凹模圆角附近,整体应变分布更为均匀。不同区域的磁流变液力学特性的差异影响了板材的变形和受力状态,最终导致胀形件构型和破裂位置发生改变。Aiming at the contradiction between the overall control of flexible-die performance in traditional flexible-die forming and the differentiated needs of different deformation areas of parts,magnetorheological fluid was used as the forming flexible-die material to conduct bulging experiments and simulation studies on Al1060 sheet under subregional flexible-die control.The focus was on the effect of center-dominant magnetic field and edge-dominant magnetic field on the deformation behavior of the sheet.The results show that the use of subregional flexible-die control method can significantly change the deformation behavior of sheet during bulging process.Under the central-dominant magnetic field,the ellipticity of the specimen is 0.85,and the fracture position is located at the sudden change area of the magnetic field.The maximum strain occurs at the position with radius of about 10 mm.Under the edge-dominant magnetic field,the ellipticity of the specimen is 0.47,and the fracture position is located near the cavity fillet area,resulting in more uniform overall strain distribution.The mechanical properties of magnetorheological fluid in different areas affect the deformation and stress state of the sheet,ultimately leading to changes in the configuration and fracture location of bulging parts.

关 键 词：软模成形 分区域调控 磁流变液 胀形 变形行为 

分 类 号：TG386.3[金属学及工艺—金属压力加工]