• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (12): 226-236.doi: 10.3901/JME.2021.12.226

• 材料科学与工程 • 上一篇    下一篇

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管材流体高压成形起皱行为与皱纹控制研究进展

崔晓磊1,2   

  1. 1. 哈尔滨工业大学金属精密热加工国家级重点实验室 哈尔滨 150001;
    2. 哈尔滨工业大学材料科学与工程学院 哈尔滨 150001
  • 收稿日期:2020-10-30 修回日期:2021-05-03 出版日期:2021-08-31 发布日期:2021-08-31
  • 通讯作者: 崔晓磊(通信作者),男,1986年出生,博士,讲师。主要研究方向为流体高压成形技术及相关塑性失稳行为,电辅助成形与制造。E-mail:xiaoleicui@hit.edu.cn;cuixiaolei2005@163.com
  • 基金资助:
    国家自然科学基金(51805357)和山西省青年科技研究基金(201801D221220)资助项目

Research Progress on Wrinkling Behavior and Wrinkles Control for Tube Hydroforming

CUI Xiaolei1,2   

  1. 1. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001;
    2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001
  • Received:2020-10-30 Revised:2021-05-03 Online:2021-08-31 Published:2021-08-31

摘要: 管材的起皱行为及其控制方法是目前流体高压成形领域的研究热点,对汽车、航空航天等重要领域高性能轻质整体复杂薄壁零件的成形制造具有重要意义。针对流体高压成形中薄壁管材受载复杂而易发生失稳起皱的问题,首先综述了管材在轴压或轴压与内压联合作用下的塑性失稳及起皱行为,讨论常用的管材轴向临界起皱应力模型及在流体高压成形中的应用,并发现通过预制有益皱纹可预先在变形区聚集材料从而显著提高管材成形极限。此外,重点介绍管材流体高压成形过程中起皱行为的控制方法,对管材起皱过程的应力分布、皱纹几何形状的演变规律进行了分析。提出可将三维应力状态和非均匀温度场作用下管材起皱行为作为重点研究方向,这不仅有助于构建复杂受载、非均质管壳的失稳起皱理论体系,而且可提高难变形材料大膨胀率管件的成形制造能力。

关键词: 管材流体压力成形, 起皱行为, 有益皱纹, 三维应力, 选区加热

Abstract: The wrinkling behavior of tube and its control method are the research foci in the field of hydroforming, which is of great significance to the manufacturing of integral complex thin-walled parts with high performance and lightweight used in automobile, aerospace and other important fields. The plastic buckling and wrinkling behavior of tubes under axial or combined axial and internal pressure are reviewed firstly in view of the wrinkling instability of thin-walled tubes due to the complicated loading conditions during the hydroforming process. Then, the commonly used axial critical wrinkling stress models and their application in tube hydroforming are discussed. It is found that the forming limit of the tube can be significantly improved by preforming useful wrinkles, which can accumulate materials in the deformation area in advance. In addition, the control methods of wrinkling behavior in the process of tube hydroforming are introduced emphatically. The stress distribution and the evolution of the wrinkle geometry during the wrinkling process are analyzed. Finally, it is proposed that the wrinkling behavior of tubes under three-dimensional stress state and nonuniform temperature field can be regarded as the key research direction. This is not only helpful to construct the theoretical system of wrinkling instability of tube under complex loading conditions and inhomogeneous tube, but also can improve the manufacturing capability of hard-to-deform materials tubular components with large expansion ratio.

Key words: tube hydroforming, wrinkling behavior, useful wrinkles, three-dimensional stress state, selective heating

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