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Modeling of stiffness characteristic on evaluating clamping scheme of milling of thin-walled parts

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Abstract

As one of the vital technological factors influencing the machining quality, machine tool fixture has been regarded as an important research object by scholars at home and abroad. In this paper, a new method for rapid evaluation of clamping scheme was presented based on the study of machining deformation of aerospace complex thin-walled parts. Firstly, Through the modal analysis of the thin-walled parts, the weak links of the structure and the direction of the large vibration displacement of the nodes are found. Then, the maximum displacement and natural frequency of the main vibration direction under different clamping schemes were obtained after intercepting several nodes and analyzing through FE software. The optimal clamping scheme was obtained through the result comparison. Finally, based on the existing research results, a mathematical model of evaluating the complexity of fixture characteristics was constructed. In this model, the stiffness values of multiple joints were considered, and the characteristic machining stiffness and the average value ∆K were obtained so as to evaluate the deformation resistance of the thin-walled parts. The influence of different clamping schemes on machining quality was quantitatively evaluated by the index. On the basis of the proposed method, a case study of aerospace thin-walled parts was conducted, and then the rapid evaluation and optimization of the milling clamping scheme for thin-walled parts were realized.

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Availability of data and materials

The data and materials that support the findings of this study are available from the corresponding author upon reasonable request. All data generated or analyzed during this study are included in this published article.

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Funding

This project is supported by Innovation Funding of Shanghai Aerospace Science and Technology (Grant No. SAST2019-065).

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Authors and Affiliations

  1. School of Mechanical Engineering, University of Shanghai for Science & Technology, Yangpu, Shanghai, China

    Jinhuan Su, Yan Cai, Xiaohui Jiang, Yunyue Qiang & Yifei Wang

  2. Shanghai Aerospace Equipment Manufacturing Company Limited, Shanghai, China

    Xiao Liu

Authors
  1. Jinhuan Su
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  2. Yan Cai
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  3. Xiaohui Jiang
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  4. Yunyue Qiang
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  5. Yifei Wang
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  6. Xiao Liu
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Contributions

Jinhuan Su: conceptualization, methodology. Yan Cai: data curation, validation, writing—original draft preparation. Xiaohui Jiang: visualization, investigation. Yunyue Qiang: supervision. Xiao Liu: writing—reviewing and editing.

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Correspondence to Xiaohui Jiang.

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Su, J., Cai, Y., Jiang, X. et al. Modeling of stiffness characteristic on evaluating clamping scheme of milling of thin-walled parts. Int J Adv Manuf Technol 113, 1861–1872 (2021). https://doi.org/10.1007/s00170-021-06740-0

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  • DOI: https://doi.org/10.1007/s00170-021-06740-0

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