基于电解扫掠成形原理的整体叶盘叶根加工方法

doi:10.7527/S1000-6893.2015.0191

Abstract

Abstract:

The machining residual will be formed at the blade root after the blisk is processed by the electrochemical machining (ECM) method by the sheet or tubular cathode because of the influences of the movement and shape of the cathode, and it will reduce the machining precision of the blisk. In order to remove the residual at the root of the blade after electrochemical machining, the electrochemical machining scheme on blade root is carried out. Firstly, the machining scheme is determined according to the residual distribution and the structure of the channel. Secondly, the cathode structure is developed and the processing paths are calculated. The sector structure is adopted in the flow path and the flow velocity distribution is analyzed; therefore, the flow field of the cathode is improved by adding the drainage, changing the angle and other measures. The processing paths are optimized and the motion interference and the NC program are verified by the special-purpose simulation software. The lack resulting from the difference between the width of the channel and the width of the front edge of the cathode is compensated by the increase of additional rotation of the blisk. Finally, the ECM unit is made and the electrochemical machining tests about the root are carried out and verify the method. The result proves that the residual is effectively removed at the blade root and the surface quality and the processing accuracy meets the requirements.

Key words: integral impeller, electrochemical machining, sweep shaping, path optimization, cathode design, flow field analysis

CLC Number:

V261.5
TG662

WANG Fuyuan, ZHAO Jianshe. Processing method of blade root of blisk based on principle of electrochemical sweep shaping[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(10): 3457-3464.

References

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Processing method of blade root of blisk based on principle of electrochemical sweep shaping

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