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Analysis and optimization of the machining fixture system stiffness for near-net-shaped aero-engine blade

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Abstract

Low stiffness of the near-net-shaped blade machining fixture of aero-engine creates challenges for the CNC machining accuracy and efficiency of near-net-shaped blade. This study aims to optimize the fixture’s material and structure to improve the stiffness of the blade-fixture system. First, the main influencing factors of the near-net-shaped blade tenon root CNC machining process were analyzed, and the influences of the positioning and clamping component materials and structures on the stiffness of the machining fixture were analyzed based on finite element analysis (FEA). Second, the mechanical properties of the positioning and clamping components of different materials and structures were analyzed based on cross-scale analysis from microscopic and macroscopic perspectives. Finally, the positioning and clamping components of the machining fixture were designed based on material selection and structure optimization, and the optimized machining fixture with new material and structural was verified by CNC machining process. The results showed that the material and structure of the positioning and clamping components were the main influencing factors of the machining fixture stiffness. The positioning and clamping components of the PEEK-GF30 material of the new splicing structure could effectively improve the blade-fixture stiffness.

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Funding

This research was supported in part by Xi’an Aero-Engine (Group) Ltd. and the National Natural Science Foundation of China [grant number 51575310].

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Authors and Affiliations

  1. State Key Laboratory of Tribology, Beijing Key Lab of Precision/Ultra-Precision Manufacturing Equipment and Control, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China

    Hui Wang & Dongbo Wu

  2. Yantai University, Yantai, 264005, Shandong, People’s Republic of China

    Kaiyao Zhang & Tao Yu

  3. AECC Xi’an Aero-engine LTD, Xi’an, 710021, People’s Republic of China

    Jie Yu

  4. Beijing Automotive Technician Institute, Beijing, 102600, People’s Republic of China

    Yanping Liao

Authors
  1. Hui Wang
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  2. Kaiyao Zhang
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  3. Dongbo Wu
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  4. Tao Yu
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  5. Jie Yu
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  6. Yanping Liao
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Contributions

Hui Wang: methodology, formal analysis, original draft writing

Kaiyao Zhang: experiment, simulated analysis, original draft writing

Dongbo Wu: experiment, data analysis, writing—review and editing

Tao Yu: experiment

Jie Yu: experiment

Yanping Liao: experiment

Corresponding author

Correspondence to Dongbo Wu.

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Wang, H., Zhang, K., Wu, D. et al. Analysis and optimization of the machining fixture system stiffness for near-net-shaped aero-engine blade. Int J Adv Manuf Technol 113, 3509–3523 (2021). https://doi.org/10.1007/s00170-021-06730-2

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  • DOI: https://doi.org/10.1007/s00170-021-06730-2

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