立方晶粒正交板材的拉深制耳分析

岳文霞; 吴浪; 管明文; 汤梦剑

doi:10.3879/j.issn.1000-0887.2013.03.008

立方晶粒正交板材的拉深制耳分析

doi: 10.3879/j.issn.1000-0887.2013.03.008

¹南昌大学建筑工程学院, 南昌 330029; ²江西科技师范大学,南昌 330029

基金项目: 国家自然科学基金资助项目(10972098；11172122；51268043) ; 江西省主要学科学术和技术带头人培养计划项目; 江西省赣鄱英才555工程项目

详细信息

作者简介:
岳文霞(1979—),女,博士生(E-mail:yuewenxia2004@163.com).

中图分类号: O3442;TC386
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- 被引次数: 0
出版历程
- 收稿日期: 2012-11-22
- 修回日期: 2013-01-08
- 刊出日期: 2013-03-15

Analysis Between Earing and Drawing for Orthotropic Sheet of Cubic in Deep Drawing

¹College of Architectural and Civil Engineering, Nanchang University, Nanchang 330029, P.R.China; ²Jiangxi Science and Technology Normal University, Nanchang 330029, P.R.China

摘要

摘要: 正交弱各向异性金属板材拉深过程中，一块半径为R_b的对称圆板，放在半径为r_a（r_ab）的冲模上，在冲头作用下，形成一个柱状杯子，由于材料的各向异性，使杯沿上出现“耳朵”．假设板材为刚塑性材料并服从Hill屈服准则，推得拉深过程中，反应制耳的变量拉伸率ν=R_b/r_a与Hill屈服准则系数之间的关系式和弱织构正交板材冲深过程中杯高的理论表达式（含织构系数）．通过3种试样的算例得出，改变板材的织构系数，改变制耳的大小，最终达到消除制耳．
- 立方晶粒 /
- 制耳 /
- Hill屈服准则 /
- 正交板材 /
- 织构系数
Abstract: In deep drawing (or the swift cupping test) of sheet metals, a circular blank of radius R_b is placed symmetrically under a blankholder over a die with a circular aperture of radius r_ab. A flatheaded punch of circular crosssection is forced down onto the blank, which is allowed to slip under the blankholder and formed into a cylindrical cup, open at the top and closed at the base.Because of plastic anisotropy of the sheet metal, it is commonly observed that “ears” form in positions roughly symmetrical with respect to the direction of rolling in the original sheet. Under the assumption that the blank be rigidplastic and obey Hill’s quadratic yield function, an explicit formula expressing the earing value of a deepdrawn cup in terms of the drawing ratio ν=R_b/r_a was derived. The validity of this formula(including texture coefficient) is examined against results of cupping tests conducted on batches of commercially pure (L2Y2) aluminum blanks that had undergone various heat treatments.
- cubic /
- earing /
- Hill yield function /
- orthotropic sheet /
- texture coefficient

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参考文献(17)

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