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Polishing surface integrity of TC17 aeroengine blades

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Abstract

Aeroengine blades have high requirements for surface integrity. Through the flexible polishing of TC17 engine blades, the surface integrity of polished blades is improved. First, the influence of process parameters on polishing force and polishing temperature is analyzed through experiments. The influence of parameters on surface roughness is analyzed, and the relationship between wear debris shape and surface morphology under different process parameters are analyzed from the microscopic level. Second, the influence of process parameters on the residual stress of the polished surface is analyzed in accordance with the polishing force and polishing temperature. Then, the variation of the residual stress of the blade after milling and polishing is analyzed. In addition, the microstructure of the metamorphic layer after milling and polishing is analyzed. Experimental results show that reasonable polishing parameters can effectively improve the surface integrity of the blade.

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Abbreviations

n :

Spindle speed, r/min

a p :

Compression quantity, mm

f :

Feed rate, mm/min

p :

Size, #

Ra x :

Roughness in x direction, μm

Ra y :

Roughness in y direction, μm

σ x :

Residual stress in x direction, MPa

σ y :

Residual stress in y direction, MPa

F x :

Polishing force in x direction, N

F y :

Polishing force in y direction, N

F z :

Polishing force in z direction, N

Q :

Heat generated by polishing, J

m :

Mass of polishing abrasive sheet, Kg

T :

Polishing temperature, °C

v :

Rotational speed, m/s

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 51675439), the Natural Science Foundation of Zhejiang Province (CN) (LY19F030006), and the Zhejiang Natural Science Foundation (LY20E050027).

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Authors and Affiliations

  1. School of Mechanical and Electronical, Northwestern Polytechnical University, Xi’an, 710072, China

    De Liu, Yaoyao Shi, Xiaojun Lin & Chao Xian

  2. School of Automation, Wenzhou Polytechnic, Wenzhou, 325035, China

    Zhiyang Gu

Authors
  1. De Liu
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  2. Yaoyao Shi
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  4. Chao Xian
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Corresponding author

Correspondence to De Liu.

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Recommended by Editor Chongdu Cho

De Liu is a doctor of the School of Mechanical and Electronic Engineering, Northwestern Polytechnical University. His research interests include electromechanical control and automation, special CNC process equipment, high-speed and high-efficiency CNC machining, and complex surface polishing technology.

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Liu, D., Shi, Y., Lin, X. et al. Polishing surface integrity of TC17 aeroengine blades. J Mech Sci Technol 34, 689–699 (2020). https://doi.org/10.1007/s12206-020-0114-7

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  • DOI: https://doi.org/10.1007/s12206-020-0114-7

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