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Analysis of machining deformation for adaptive CNC machining technology of near-net-shaped jet engine blade

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Abstract

Near-net-shaped process (NNSP) will be one of important development trend in TC4 blade manufacturing, while the blade precise machining after NNSP is a challenge. This paper analyzes the machining deformation of blade under the rigid-flexible coupling fixture (RFCF) and adaptive computer numerical control machining process (ACNCMP). Firstly, positioning and clamping scheme (PCS) of RFCF were introduced and analyzed, especially new material (PEEK-GF30) and new structure of RFCF were used in fixture manufacturing. Secondly, theoretical mechanic model of RFCF and blade was proposed. Thirdly, empirical model of cutting force and the main cutting parameters was established and analyzed by orthogonal cutting experiment (OCE). Fourthly, blade deformation under cutting force was analyzed by FEA and experiment. The results show that blade cutting deformation is a whole elastic deformation of 0.056mm which is acceptable for machining accuracy target of 0.1mm. The proposed RFCF can protect blade from occurring local deformation, and is of better application value in ACNCMP of NNSP blade.

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Acknowledgements

The author would like to acknowledge the support and contributions of our colleagues in Xi’an Aero-Engine (Group) Ltd. This research is supported in part by Xi’an Aero-Engine (Group) Ltd., National Key Scientific Instrument and Equipment Development Project (2016YFF0101900), National Natural Science Foundation of China (Grant 51575310), and Beijing Municipal Natural Science Foundation (Grant 3162014).

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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

    Dongbo Wu, Hui Wang & Jinsong Peng

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

    Kaiyao Zhang

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

    Jie Yu, Yuan Li, Maomin Wang & Xindong Zhang

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  1. Dongbo Wu
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  2. Hui Wang
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  4. Kaiyao Zhang
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  6. Yuan Li
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Correspondence to Hui Wang.

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Wu, D., Wang, H., Peng, J. et al. Analysis of machining deformation for adaptive CNC machining technology of near-net-shaped jet engine blade. Int J Adv Manuf Technol 104, 3383–3400 (2019). https://doi.org/10.1007/s00170-019-03898-6

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  • DOI: https://doi.org/10.1007/s00170-019-03898-6

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