| 差厚拼焊管内高压成形焊缝移动规律 |
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| 引用本文： | 初冠南,王小松,刘钢,苑世剑,葛建国.差厚拼焊管内高压成形焊缝移动规律[J].材料科学与工艺,2008,16(1):26-30. |
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| 作者姓名： | 初冠南 王小松 刘钢 苑世剑 葛建国 |
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| 作者单位： | 1. 哈尔滨工业大学,材料科学与工程学院,黑龙江,哈尔滨,150001
2. 哈尔滨东安汽车动力股份有限公司,黑龙江,哈尔滨,150066 |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金
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黑龙江省留学归国人员资金项目 |
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| 摘 要： | 为揭示差厚拼焊管内高压成形中的焊缝移动规律,采用有限元数值模拟分析了焊缝移动随内压的变化规律,研究了厚度比、长度比、摩擦系数和硬化指数等因素对焊缝移动的影响.研究表明:差厚拼焊管内高压成形存在焊缝移动,并导致薄管靠近焊缝处出现减薄峰值;焊缝移动随厚度比和长度比的增大而增大,随摩擦系数和硬化指数的增大而减小;减小焊缝移动的合理拼焊管结构为厚度比小于2.0,长度比小于3.5.
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| 关 键 词： | 拼焊管 焊缝移动 内高压成形 轻量化 |
| 文章编号： | 1005-0299(2008)01-0026-05 |
| 修稿时间： | 2007年1月16日 |
Weld movement of tailor-welded tube hydroforming |
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| CHU Guan-nan,WANG Xiao-song,LIU Gang,YUAN Shi-jian,GE Jian-guo.Weld movement of tailor-welded tube hydroforming[J].Materials Science and Technology,2008,16(1):26-30. |
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| Authors: | CHU Guan-nan WANG Xiao-song LIU Gang YUAN Shi-jian GE Jian-guo |
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| Affiliation: | 1.School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;2.Harbin Dongan Engine(Group) CO.,LTD,Harbin 150069,China) |
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| Abstract: | To reveal the weld movement phenomenon in hydroforming of tailor-welded tubes with different thicknesses,FEM simulations were carried out to analyze the effects of internal pressure,thickness ratio,length ratio,friction coefficient and hardening coefficient on weld movement.The result indicates that weld movement appears during tailor-weld tube hydroforming.Consequently,obvious thinning happens near the weld seam on the thinner tube.Weld movement increases with the increasing of thickness ratio and length ratio,but decreaseds with the increasing of friction coefficient and hardening coefficient.To reduce the weld movement,the reasonable structure of the tailor-welded tubes should be designed with thickness ratio lower than 2.0 and length ratio lower than 3.5. |
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| Keywords: | tailor-welded tube(TWT) weld movement light-weight hydroforming |
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