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Construction method of process model for correcting local profile errors of turbine blades

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Abstract

Turbine blades, mainly formed by investment casting, are one of the core components of an aero-engine. However, the profile accuracy of turbine blades shaped by investment casting sometimes cannot directly meet the design requirements, and there will be some local areas exceeding the given form tolerance. In order to reduce the blade rejection rate and develop an advanced CNC correcting method, a new process model construction method for CNC correction of turbine blades is proposed. In this method, a new multi-constraint optimization model for the design sectional curve position of turbine blades is developed, which not only enables the process model constructed from the optimized sectional curves to best fit the actual blade geometry but also minimizes the local error areas to be corrected on the actual geometry. Two typical turbine blades have been successfully performed to demonstrate the effectiveness of the proposed method. The results show that the proposed method can significantly reduce the local error areas compared to the existing method while not exceeding the given multiple constraints. Therefore, the constructed process model can be used to generate CNC tool paths to correct the minimum local error areas and thus convert the scrap turbine blades into qualified ones.

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Funding

This work is supported by the National Science and Technology Major Project of the Ministry of Science and Technology of China [grant number J2019-VII-0004–0144].

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Authors and Affiliations

  1. School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China

    Chuan-Rui Si, Zheng-Qing Zhu & Zhi-Tong Chen

  2. Ningbo Institute of Technology, Beihang University, Ningbo, 315832, China

    Zheng-Qing Zhu & Zhi-Tong Chen

  3. School of Mechanical and Materials Engineering, North China University of Technology, Beijing, 100144, China

    Yun Zhang

Authors
  1. Chuan-Rui Si
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  2. Zheng-Qing Zhu
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  3. Zhi-Tong Chen
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  4. Yun Zhang
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Contributions

Methodology and original draft preparation: Chuan-Rui Si; validation and investigation: Zheng-Qing Zhu, Zhi-Tong Chen; formal analysis: Yun Zhang.

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Correspondence to Zheng-Qing Zhu.

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Si, CR., Zhu, ZQ., Chen, ZT. et al. Construction method of process model for correcting local profile errors of turbine blades. Int J Adv Manuf Technol 124, 1751–1762 (2023). https://doi.org/10.1007/s00170-022-10597-2

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  • DOI: https://doi.org/10.1007/s00170-022-10597-2

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