Abstract
Roughness is a crucial factor that determines workpiece quality. In this paper, the time-domain signals of polishing force for polishing an aero-engine blade with an abrasive cloth wheel were experimentally obtained, and the contact arc lengths were determined based on these signals. A mathematical model for the representative Ra of blade surface roughness after polishing was then established, and this model is only related to the contact arc length. This model was experimentally verified, and the prediction results agree well with the measurement results.
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Abbreviations
- n :
-
Spindle speed, r/min
- a p :
-
Compression depth, mm
- v w :
-
Feed speed, mm/min
- P :
-
Size of abrasive cloth wheel, #
- l :
-
Contact arc length, mm
- R a :
-
Arithmetic mean deviation of profile, µm
- h :
-
Length of MN as shown in Fig. 5, mm
- F n :
-
Normal polishing force as shown in Fig. 8, N
- F t :
-
Tangential polishing force as shown in Fig. 8, N
- F x :
-
X direction force as shown in Fig. 8, N
- F z :
-
Z direction force as shown in Fig. 8, N
- α :
-
Angle between the Ft and X axes, °
- p(x) :
-
Normal stress between the blade and abrasive cloth wheel, MPa
- b :
-
Width of the abrasive cloth wheel, mm
- S :
-
Area of contact zone ABCD as shown in Fig. 9, mm2
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Acknowledgments
This work was jointly supported by the National Natural Science Foundation of China (No. 51675439) and the National Science and Technology Major Project of China (No. 2015ZX 04001003).
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Recommended by Editor Hyung Wook Park
Chao Xian is studying at the Northwestern Polytechnical University, Xi’an, China. His research interests include adaptive polishing technologies for complex surfaces and blisk milling.
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Xian, C., Shi, Y., Lin, X. et al. Roughness modeling for polishing an aero-engine blade with an abrasive cloth wheel. J Mech Sci Technol 34, 3353–3361 (2020). https://doi.org/10.1007/s12206-020-0728-9
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DOI: https://doi.org/10.1007/s12206-020-0728-9