Improvement of material flow in tube hydroforming by advanced sealing methods

IF 1.9 3区工程技术 Q3 ENGINEERING, MANUFACTURING Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2023-07-01 DOI:10.1177/09544054231184914

M. M. Kasaei, H. M. Naeini, B. Abbaszadeh, S. Hashemi, L. D. da Silva

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Abstract

In this paper, two advanced sealing methods are proposed to enhance the formability of aluminium alloys in the tube hydroforming process. These methods are aimed at omitting friction force at the contact area between the tube and the die in the feed region and facilitating the material flow to the deformation region. The advanced sealing methods are numerically and experimentally examined against the conventional sealing method by conducting the free bulge test on AA6063 aluminium tubes. The deformation mechanics are deeply analysed in the principal strain space to identify the influence of the sealing methods on deformation paths. In addition, the effectiveness of the advanced sealing methods is evaluated under different lubrication conditions and contact lengths in the feed region. Results show that in the advanced sealing methods compared to the conventional one, the thickness in the feed region does not increase and the necking occurs in larger in-plane strains, leading to a higher bulge height. Results also allow concluding that a higher bulge height is formed using the second advanced sealing method, in which the tube is pressurized from both sides in the feed region. Thus, the advanced sealing methods are recommended for tube hydroforming of aluminium alloys with low formability.

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采用先进密封方法改善管材液压成形过程中的物料流动

本文提出了两种先进的密封方法，以提高铝合金在管材液压成形过程中的成形性。这些方法的目的是在进给区域内消除管材与模具接触区域的摩擦力，使材料流向变形区域。通过对AA6063铝管的自由胀形试验，对先进密封方法与传统密封方法进行了数值和实验验证。在主应变空间深入分析了变形力学，确定了不同密封方式对变形路径的影响。此外，在不同的润滑条件和进给区接触长度下，评估了先进密封方法的有效性。结果表明:与传统密封方式相比，先进密封方式的进料区厚度没有增加，且在较大的面内应变中出现颈缩现象，导致胀头高度增大;结果还表明，采用第二种先进的密封方法，即从进料区两侧对管道加压，可以形成更高的凸起高度。因此，对于低成形性铝合金的管件液压成形，推荐采用先进的密封方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 工程技术-工程：机械

CiteScore

5.10

自引率

30.80%

发文量

167

审稿时长

5.1 months

期刊介绍： Manufacturing industries throughout the world are changing very rapidly. New concepts and methods are being developed and exploited to enable efficient and effective manufacturing. Existing manufacturing processes are being improved to meet the requirements of lean and agile manufacturing. The aim of the Journal of Engineering Manufacture is to provide a focus for these developments in engineering manufacture by publishing original papers and review papers covering technological and scientific research, developments and management implementation in manufacturing. This journal is also peer reviewed. Contributions are welcomed in the broad areas of manufacturing processes, manufacturing technology and factory automation, digital manufacturing, design and manufacturing systems including management relevant to engineering manufacture. Of particular interest at the present time would be papers concerned with digital manufacturing, metrology enabled manufacturing, smart factory, additive manufacturing and composites as well as specialist manufacturing fields like nanotechnology, sustainable & clean manufacturing and bio-manufacturing. Articles may be Research Papers, Reviews, Technical Notes, or Short Communications.