Vibration suppression of aeroengine casing during milling

Abstract

The casing is a basal body part for assembling other parts in an aeroengine, but its weak rigidity seriously affects machining accuracy and production efficiency. Therefore, it is very important to improve this rigidity of the part during processing. An aeroengine combustor casing is used to study the vibration law and suppression method of a casing milling process through a combination of simulations and physical experiments in this paper. First, the milling vibration law of a Rolls-Royce aeroengine combustor casing is analysed through mechanical analysis and machining vibration detection, and then a simulation experiment environment based on physical experiment verification is established. Second, based on a virtual experimental platform, the free mode and constraint mode of the casing without auxiliary support, multipoint rigid auxiliary support, and flexible surface auxiliary support schemes are analysed. Subsequently, to determine the optimal support pressure for different types of casing parts produced on-site, after analysing the common size range of the casing, 34 and 43 full-factor simulation experiments are performed, and the influence of each factor on the change in vibration is summarised. Finally, a static load experiment is used to verify that the clamping scheme of the flexible surface auxiliary support can improve the radial rigidity of the casing. Through the experimental research in this paper, the results show that the error between the simulation experiment results and the physical experiment is basically kept within 20%, and the established virtual experiment is reliable. At the same time, based on the simulation data in this paper, the function expressions of vibration deformation and support pressure, milling force, case thickness, and casing diameter are fitted, and the R-square reaches 91.2%. This empirical formula provides theoretical support for the selection of optimal support air pressure and the prediction of vibration and deformation.

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Data availability

The datasets used or analysed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the Youth Science Foundation of National Natural Science Foundation, China(No.51705438); the Young Science and Technology Innovation Team of Aero Engine Intelligent Manufacturing, SWPU(No.2019CXTD02); Independent Innovation Special Fund Project, AECC(No.ZZCX-2017-039) and the Sichuan Science and technology project, China (No.2018JY0366); Chengdu International Science and Technology Cooperation Project (No:2020-GH02-00040-HZ).

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Liang Guo is responsible for paper conception.

Fan Yang is responsible for experimental design.

Tian Li is responsible for experimental data analysis.

Ming Zhou is responsible for the installation of experimental equipment.

Junlei Tang is responsible for experimental summary.

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Correspondence to Liang Guo.

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Cite this article

Guo, L., Yang, F., Li, T. et al. Vibration suppression of aeroengine casing during milling. Int J Adv Manuf Technol 113, 295–307 (2021). https://doi.org/10.1007/s00170-020-06582-2

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Keywords

  • Milling vibration
  • Vibration suppression
  • Aeroengine
  • Casing
  • Finite element analysis