中国机械工程 ›› 2020, Vol. 31 ›› Issue (15): 1885-1889.DOI: 10.3969/j.issn.1004-132X.2020.15.016

• 先进材料加工工程 • 上一篇    下一篇

拉深筋对板材变形特征和力学性能的影响研究

李巧敏1, 柯俊逸2, 柳玉起2, 李红军1   

  1. 1. 武汉纺织大学工业雷管智能装配湖北省工程研究中心, 武汉, 430073;
    2. 华中科技大学材料成形与模具技术国家重点实验室, 武汉, 430074
  • 收稿日期:2019-07-28 出版日期:2020-08-10 发布日期:2020-08-26
  • 通讯作者: 柳玉起(通信作者),男,1966年生,教授、博士研究生导师。研究方向为板料成形数值模拟及智能化。E-mail:liuyq@mail.hust.edu.cn。
  • 作者简介:李巧敏,女,1989年生,讲师。主要研究方向为金属塑性成形及其数值模拟。
  • 基金资助:
    国家自然科学基金资助项目(51805181)

Study on Effects of Drawbead on Deformation Characteristics and Mechanics Properties of Sheet Metals

LI Qiaomin1, KE Junyi2, LIU Yuqi2, LI Hongjun1   

  1. 1. Hubei Provincial Engineering Research Center of Industrial Detonator Intelligent Assembly, Wuhan Textile University, Wuhan, 430073;
    2. State Key Laboratory of Materials Processing and Die &Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074
  • Received:2019-07-28 Online:2020-08-10 Published:2020-08-26

摘要: 采用实验方法将金属板材拉过不同尺寸的拉深筋镶块,分析了拉深筋高度、圆角半径以及过筋次数对板材变形特征的影响规律,研究了过筋产生的预应变对板材后续力学性能的影响规律。结果表明:板材流过拉深筋后,流动方向上发生均匀的拉伸变形;过筋产生的预应变随着拉深筋高度增大而增大,随着圆角半径增大而减小,随着过筋次数增加而近似线性增大;预应变越大,材料后续屈服强度和抗拉强度越高,但后续延伸率越小,总延伸率随着预应变增大表现出先减小后增大的趋势。

关键词: 金属板材, 拉深筋, 力学性能, 预应变, 延伸率

Abstract: Taking experiments where sheet metal samples were pulled through drawbead inserts with different geometrical parameters, the effects of the height and the radius of the drawbead, as well as the number of times passing through the drawbead, on the deformation characteristics of the sheet metal samples, were analyzed. Besides, the influences of the pre-strain on the subsequent mechanics properties of the sheet metals were also studied. The results show that, after passing through the drawbead, the sheet metal samples were uniformly stretched in the flow direction, and the pre-strain caused by the drawbead increases with the height of the drawbead, decreases with the radius of the drawbead and increases almost linearly with the times of passing through the drawbead. The larger the pre-strain(is), the higher the subsequent yield strength and tensile strength of the material(is), but the smaller the subsequent elongation(is). With the increase of the pre-strain, the total elongation first decreases and then increases.

Key words: sheet metal, drawbead, mechanics property, pre-strain, elongation

中图分类号: