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Characteristics of thickness distribution of tailor-welded tube hydroforming

ISSN号：1005-9784
期刊名称：Journal of Central South University of Technology
时间：2011.12.12
页码：1813-1818
分类：TG394[金属学及工艺—金属压力加工] TQ320.664[化学工程—合成树脂塑料工业]
作者机构：[1]School of Naval Architecture, Harbin Institute of Technology at Weihai, Weihai 264209, China, [2]School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China, [3]State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China
相关基金：Projects（51005054, 50575051） supported by the National Natural Science Foundation of China; Project（HIT.BRETI.2010010） supported by the Fundamental Research Funds for the Central Universities, China; Project（20100471025） supported by the National Science Foundation for Post-doctoral Scientists of China
相关项目：铝合金管材磁脉冲辅助内高压成形机理研究

作者： Chu Guan-nan|Liu Gang|Yuan Shi-jian|Liu Wen-jian|

关键词：厚度分布, 液压成形, 拼焊, 应变状态, 内高压成形, 焊接缝, 机械分析, 厚度差, tailor-welded tube, thickness distribution, hydroforming, weight reduction

中文摘要：

试验性、机械的分析被执行为焊接裁缝的试管(TWT ) 调查厚度分发的特征有不一样的厚度的 hydroforming。然后，焊接缝接位置的效果和厚度差别也被揭示。一个多重直径的试管被形成在 TWT hydroforming 期间揭示特征和厚度分发的整齐。尽管 TWT 有一样的扩大比率，在厚度分发有明显的变化，这被显示尽管 TWT 有一样的扩大比率。更薄的试管的变瘦的比率比特别在地区的更厚的试管的关门到焊接缝接的大。在在二个试管片断之间的变瘦的比率的差别能到达 9% 。因而，厚度的突然、大的变化出现在附近的地区焊接缝接。当厚度差别增加，在在更薄、更厚的试管之间的变瘦的比率的差别扩大，但是作为长度比率增加改善。不同紧张状态是主要原因导致不一致的厚度分发。在厚度的差别是主要原因在更薄、更厚的试管上导致不同紧张状态。

英文摘要：

Both experimental and mechanical analyses were carded out to investigate the characteristics of thickness distribution for tailor-welded tube （TWT） hydroforming with dissimilar thickness. Then, the effects of weld-seam position and thickness difference were also revealed. A multiple-diameter tube was formed to reveal the characteristics and the regularity of thickness distribution during TWT hydroforming. It is indicated that there are obvious fluctuations in thickness distribution though the TWTs have the same expansion ratio. The thinning ratio of thinner tube is bigger than that of thicker tube especially in the zone closed to the weld-seam. The difference in thinning ratio between two tube segments can reach 9%. Consequently, sudden and large fluctuation of thickness appears in the zone nearby the weld-seam. The difference in thinning ratio between thinner and thicker tubes enlarges as the thickness difference increases, but improves as length ratio increases. Different strain states are the main reason to induce nonuniform thickness distribution. The difference in thickness is the main reason to induce different strain states on thinner and thicker tubes.

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