Research on shaping law in electrochemical machining for the leading/trailing edge of the blade

Affiliation of Author(s):机电学院

Journal:INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

Key Words:Electrochemical machining Blade Trailing edge Leading edge Simulation

Abstract:The blade is a crucial component in an aero engine. In electrochemical machining of blades, the shaping law of the leading/trailing edge is intricate because of the complexity of the flow field and electric field distributions at these locations. This paper researches the formation of the leading/trailing edge. The dissolution process of the leading/trailing edge is simulated using an initial cathode and then its forecasted profile is obtained. The cathode is then adjusted according to the deviations between the forecasted profile and the model. Meanwhile, a coefficient between the deviations and the corrected value of the cathode is obtained after optimization simulation and the optimal value is about 1.17. Then, an optimal cathode is acquired by using the optimal coefficient. In addition, the effects of the thermal and hydrogen generation are also considered. The temperature increases to 8.28K and the bubble rate increases to 25.30% at the electrolyte outlet. Furthermore, verification experiments are performed with the optimal cathode. The results show that the margin edges are formed and the accuracy is 0.13mm of the leading edge, while the allowance of the profile at the electrolyte outlet is larger than that at the inlet, which means that the bubble rate is dominant in the inter-electrode gap. The results indicate that the design method for the leading/trailing edge is appropriate and can be used for manufacturing other complex components such as blisks and diffusers.

ISSN No.:0268-3768

Translation or Not:no

Date of Publication:2019-05-01

Co-author:Yu, Lingguo,Zhao, Jibin,lj,XU Zhengyang

Date of Publication:2019-05-01