基于单颗粒模型的航发叶片砂带磨削微观仿生锯齿状表面形成及实验

doi:10.7527/S1000-6893.2019.23288

Abstract

Abstract: The micro-biomimetic surface with drag reduction and high integrity derived from shark skin is widely used in aviation blades, playing an important role in improving the fatigue life and aerodynamic performance of aviation parts. Since belt grinding can achieve the machining of parts' surface with high integrity requirements, it is often used in the processing of blades. While it can achieve the machining of micro-surface shapes, few studies on the micro-surface of belt grinding have been conducted. Firstly, its typical structural characteristics are analyzed. Based on the grinding model of single grain belt, the grinding removal mechanism of single particle is studied. Then the parametric mathematical model of belt grinding particles is established, and the micro bionic zigzag surface grinding method is proposed. Finally, the blade profile of titanium alloy is verified by building the basic experimental platform of micro-bionic zigzag surface grinding with titanium alloy as the typical material. Micro shapes' parameters on the surface of a blade after processed are determined. The results showed that the majority of the micro bionic zigzag surface achieved by the belt grinding method has zigzag groove. The groove width is between 2.5-8 μm with a mean value of 4.91 μm, the height of the groove is between 3.5-9 μm with a mean value of 5.91 μm, and the groove angle is between 28°-68° with a mean value of 42.3°. These results verified that belt grinding can achieve the machining of micro bionic zigzag surface.

Key words: single particle model, bionic surface, belt grinding, titanium alloy blade, zigzag surface, shark skin

CLC Number:

V261.2⁺5

XIAO Guijian, HE Yi, HUANG Yun, LI Wei, LI Quan. Single particle removal model and experimental study on micro bionic zigzag surface of aeronautical blade using belt grinding[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(7): 623288-623288.

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Single particle removal model and experimental study on micro bionic zigzag surface of aeronautical blade using belt grinding

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