Adaptive machining method for leading and trailing edges of aero-engine turbine blades

Abstract

The invention discloses a self-adaptive machining method for the leading and trailing edges of aero-engine turbine blades, which relates to the technical field of electrolytic machining. The present invention automatically completes the precision electrolytic machining of the front and rear edges of the blade by arranging a plurality of uniformly distributed follower mechanisms on the swing mechanism, and the tool cathode and the leading edge cathode 1 and the leading edge cathode 2 arranged inside automatically complete the integral impeller together. The processing of the blade back part of the blade on one side of the two adjacent blades and the blade basin part of the other blade, the flow field is stable, and the short-circuit ablation is prevented. Guarantee the machining quality of the blades; by performing intermittent vibration electrolysis on the horizontally placed integral impeller, the efficiency of precision electrolytic machining is greatly improved, and the quality difference of the machining blades can be eliminated.

Description

technical field [0001] The invention relates to the technical field of electrolytic machining, in particular to an adaptive machining method for the leading and trailing edges of an aero-engine turbine blade. Background technique [0002] In aero-engines, in order to achieve high performance requirements such as weight reduction and reduction of airflow loss, the integral impeller has now become a must-select structure for engines with high thrust-to-weight ratios, and has been widely used in military and civil aero-engines. The cross-section changes are complex, which puts forward extremely high requirements on the processing and manufacturing technology. In the prior art, rod-shaped electrodes are usually used to rough process the blank of the integral impeller to achieve a shape close to the final shape. Precision electrolysis with excellent processing quality is used for further processing, that is, two oppositely arranged vibrating cathode tool electrodes are used to pr...

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Problems solved by technology

[0003] However, for the precision electrolytic processing technology used in the existing technology, our company has found that there are still some disadvantages in the long-term use process: 1. The electrolyte is rushed from bottom to top between the electrodes of the cathode tool, and the two parts that do not fit together The flow is diverted and discharged laterally in the gap of the side edge plate area, resulting in relatively turbulent flow fields at the leading edge and trailing edge of the blade during precision machining of small gaps, and the radius of curvature of the leading edge and trailing edge of the blade is relatively small, and the two cathode tools At the point where the electrodes are closest to each other, there is still a linear unfinished area on the leading edge of the blade; 2. Each independent blade on the integral impeller placed in the opposite direction is precisely processed one by one, the processing efficiency is extremely slow, and once the rotation process exists Small size changes will lead to differences in the quality of the corresponding processed blades on the overall impeller

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