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基于板料電磁翻邊的電磁力分布及成形質(zhì)量影響
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作者單位:

1.華中科技大學(xué) 材料科學(xué)與工程學(xué)院 材料成形與模具技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;2.中國(guó)航天科技集團(tuán)公司長(zhǎng)征機(jī)械廠

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中圖分類號(hào):

TG391

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(51575206,51435007)；中國(guó)航天科技集團(tuán)公司航天科技創(chuàng)新基金(CASC150704)；湖南大學(xué)汽車車身先進(jìn)設(shè)計(jì)制造國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金(31615006)；中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(2016YXZD055)


Electromagnetic force distribution and its effects on the forming quality for electromagnetic flanging of sheet metal
Author:
Affiliation:

1.State Key Laboratory of Materials Processing and Die Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology;2.Changzheng Machinery Factory,China Aerospace Science and Technology Corporation

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    摘要:

    本文針對(duì)鋁合金板料電磁翻邊工藝過(guò)程,采用數(shù)值模擬方法,研究板料上的電磁力分布特性以及幾何參數(shù)對(duì)電磁力分布的影響規(guī)律,并揭示電磁力分布對(duì)翻邊件成形質(zhì)量的影響。結(jié)果表明,鋁合金板料電磁翻邊中,預(yù)制孔的存在使板料上形成電磁力邊緣積聚效應(yīng),板料預(yù)制孔徑和成形線圈內(nèi)徑參數(shù)通過(guò)改變線圈投影面積比影響電磁力分布；隨著線圈投影面積比的減小,電磁力邊緣積聚效應(yīng)更加顯著,邊緣電磁力密度增大；電磁力分布較均勻時(shí),圓角區(qū)材料塑性流動(dòng)更顯著,成形件能獲得更高的成形高度與更小的邊緣減薄率,變形區(qū)厚度分布較均勻,成形質(zhì)量更好。

    Abstract:

    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.

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引用本文

黃攀,黃亮,李建軍,蘇紅亮,馬飛.基于板料電磁翻邊的電磁力分布及成形質(zhì)量影響[J].稀有金屬材料與工程,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.]
DOI：10.12442/j. issn.1002-185X.20180562

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  • 收稿日期:2018-05-29
  • 最后修改日期:2018-07-25
  • 錄用日期:2018-07-27
  • 在線發(fā)布日期: 2019-10-09
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