黄攀,黄亮,李建军,苏红亮,马飞.基于板料电磁翻边的电磁力分布及成形质量影响[J].稀有金属材料与工程,2019,48(9):2987~2993.[Huang Pan,Huang Liang,Li Jianjun,Su Hongliang,Ma Fei.Electromagnetic force distribution and its effects on the forming quality for electromagnetic flanging of sheet metal[J].Rare Metal Materials and Engineering,2019,48(9):2987~2993.]
基于板料电磁翻边的电磁力分布及成形质量影响
投稿时间:2018-05-29??修订日期:2018-07-25
中文关键词:??电磁翻边??电磁力??边缘积聚效应??成形质量
基金项目:国家自然科学基金(51575206,51435007);中国航天科技集团公司航天科技创新基金(CASC150704);湖南大学汽车车身先进设计制造国家重点实验室开放基金(31615006);中央高校基本科研业务费专项资金(2016YXZD055)
中文摘要:
??????本文针对铝合金板料电磁翻边工艺过程,采用数值模拟方法,研究板料上的电磁力分布特性以及几何参数对电磁力分布的影响规律,并揭示电磁力分布对翻边件成形质量的影响。结果表明,铝合金板料电磁翻边中,预制孔的存在使板料上形成电磁力边缘积聚效应,板料预制孔径和成形线圈内径参数通过改变线圈投影面积比影响电磁力分布;随着线圈投影面积比的减小,电磁力边缘积聚效应更加显着,边缘电磁力密度增大;电磁力分布较均匀时,圆角区材料塑性流动更显着,成形件能获得更高的成形高度与更小的边缘减薄率,变形区厚度分布较均匀,成形质量更好。
Electromagnetic force distribution and its effects on the forming quality for electromagnetic flanging of sheet metal
英文关键词:electromagnetic flanging??electromagnetic force??marginal accumulation effect??forming quality
英文摘要:
??????Based on electromagnetic flanging process of aluminum alloy sheet metal, numerical simulation was conducted to investigate the distribution characteristics of the electromagnetic force and the influence of geometry parameters on the electromagnetic force distribution, and then the influence of the electromagnetic force distribution on the forming quality of workpieces was revealed. The results show that in the process of electromagnetic flanging of aluminum alloy sheet metal, the marginal accumulation effect of the electromagnetic force was produced due to the existence of the precast hole. The aperture of the sheet metal and the inner diameter of the forming coil can affect the distribution of electromagnetic force by changing the ratio of the projection area to the coil area. With the decrease of the ratio of the projection area to the coil area, the marginal accumulation effect of the electromagnetic force becomes more prominent, and the electromagnetic force density of the hole edge increases. Materials in the corner area flow more significantly under the circumstance of the uniform electromagnetic force distribution, meanwhile higher forming height and smaller edge reduction rate can be obtained after forming, which means more uniform thickness distribution of the deformation area and better forming quality of workpiece.
作者单位E-mail
黄攀?华中科技大学 材料科学与工程学院 材料成形与模具技术国家重点实验室?hphust@hust.edu.cn?
黄亮?华中科技大学 材料科学与工程学院 材料成形与模具技术国家重点实验室?huangliang@hust.edu.cn?
李建军?华中科技大学 材料科学与工程学院 材料成形与模具技术国家重点实验室??
苏红亮?华中科技大学 材料科学与工程学院 材料成形与模具技术国家重点实验室??
马飞?中国航天科技集团公司长征机械厂??
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