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Investigation on the influence of weld position on the deformation behavior of welded tube during free bending process

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Abstract

The plastic deformation behavior of welded tube is affected by the non-uniform distribution of the mechanical properties of welded tube during the free bending process. To explore the influence of weld position on the forming quality and axis dimensional accuracy of welded tube, the free bending experiment and numerical simulation of welded tube were conducted in this paper. First, the principle of free bending was theoretically deduced and the stress distribution of bent tube was analyzed. Then, the hardness test and uniaxial tensile test were conducted to obtain the mechanical properties of weld zone and parent zone of welded tube. The material strength in the weld zone of welded tube is significantly higher than that in the parent zone. Finally, the free bending experiment and numerical simulation with different weld positions were carried out, and the influence of weld position on the bending radius, cross-sectional distortion, and wall thickness of bent tube was discussed. All these findings advance the insight into the free bending deformation behavior of welded tube and help to improve the forming quality of welded tubes and facilitate the application of free bending technology in welded tube.

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Funding

This work was supported by the Opening Project of State Key Lab of Digital Manufacturing Equipment & Technology (No. DMETKF2021004), the National Natural Science Foundation of China (Nos: 52105360, U1937206), Ningbo “science and technology innovation 2025” major special project (No.2020Z078), and Youth Fund of Jiangsu Province Natural Science Foundation (No.BK20210310).

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Authors and Affiliations

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211100, People’s Republic of China

    Cheng Cheng, Chao Pan, Chunmei Liu & Xunzhong Guo

  2. State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, People’s Republic of China

    Cheng Cheng

  3. Shenyang Aircraft Corporation, Shenyang, 110850, People’s Republic of China

    Cheng Cheng & Xueshan Bai

Authors
  1. Cheng Cheng
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  2. Chao Pan
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  3. Xueshan Bai
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  4. Chunmei Liu
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  5. Xunzhong Guo
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Cheng Cheng, Chao Pan, Xueshan Bai. The first draft of the manuscript was written by Chunmei Liu and Xunzhong Guo. The revised manuscript was finished by Cheng Cheng and Xunzhong Guo. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Cheng Cheng or Xunzhong Guo.

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Cheng, C., Pan, C., Bai, X. et al. Investigation on the influence of weld position on the deformation behavior of welded tube during free bending process. Int J Adv Manuf Technol 120, 2201–2215 (2022). https://doi.org/10.1007/s00170-022-08893-y

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  • DOI: https://doi.org/10.1007/s00170-022-08893-y

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