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Research on Machining Deformation of 7050 Aluminum Alloy Aircraft Rib Forging

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Abstract

T-type rib strip was the key connective component between the fuselage and wing of the aircraft and the main processes for preparation of T-type rib strip consisted of forging forming, solution quenching, cold pressing and machining. The variation of residual stress and its effect on the deformation during the final machining process was quite complex. In this study, the numerical models of solution quenching, cold pressing and machining of T-type rib strip was established. The variation of residual stress on the deformation of T-type rib strip was studied. The results show that the maximum quenching stress of the T-type rib was about − 200 MPa at the surface and 150 MPa in the core. A reduction of 60% of the average residual stress can be achieved during the cold pressing process with a reduction rate of 3% and a friction coefficient of 0.3. Compared with direct machining after quenching, the deformation of machining after solution quenching and cold pressing was greatly reduced and the reduction rate reached 65.04%.

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Funding

This study was funded by the National Natural Science Foundation of China (Grant Number: 51327902, U1637601), the State Key Laboratory of High Performance and Complex Manufacturing (Grant Number: Kfkt2016-04).

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Authors and Affiliations

  1. College of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China

    Yaoqiong Liu, Hai Gong & Yongbiao He

  2. Nonferrous Metal Oriented Advanced Structural Materials and Manufacturing Cooperative Innovation Center, Central South University, Changsha, 410083, China

    Yaoqiong Liu, Hai Gong, Yongbiao He, Tao Zhang & Yanjie Sun

  3. State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, 410083, China

    Hai Gong & Tao Zhang

  4. Avic The First Aircraft Institute, Xi’an, 710000, China

    Yaoqiong Liu

  5. Department of Nuclear Physics, China Institute of Atomic Energy, Beijing, 102413, China

    Xiaolong Liu

Authors
  1. Yaoqiong Liu
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  2. Hai Gong
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  3. Yongbiao He
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  4. Tao Zhang
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  5. Yanjie Sun
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  6. Xiaolong Liu
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Contributions

Conceptualization: YL, HG, YH, TZ, YS; Validation: YL, HG, YH, TZ, YS, XL; Formal analysis: YL, HG, YH; Investigation: YL, HG, YH, TZ, YS, XL; Writing-Review and Editing: YL, HG; Supervision: YL.

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Correspondence to Hai Gong or Yongbiao He.

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Liu, Y., Gong, H., He, Y. et al. Research on Machining Deformation of 7050 Aluminum Alloy Aircraft Rib Forging. Int. J. Precis. Eng. Manuf. 23, 533–543 (2022). https://doi.org/10.1007/s12541-022-00640-3

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  • DOI: https://doi.org/10.1007/s12541-022-00640-3

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