METHOD OF TURBOMACHINE HOLLOW BLADE TREATMENT WITH PERFORATED HOLES Russian patent published in 2020 - IPC B23H3/04 B23H3/08 B23H9/10 C25F3/16 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used for dry electrochemical polishing of perforations in hollow blades of turbomachines. Method comprises placing blade into medium of granules made of anion exchangers impregnated with solution of electrolyte, providing electrical conductivity of said granules and ion entrainment of metal with removal of microprojections from treated surface of blade and having dimensions not exceeding minimum cross-sectional dimension of least perforated holes. Electrically opposite potential is fed to the electrode and the blade and the inner cavity of the blade and the edges of the perforated holes of the blade are treated. Two-way brush is placed in the inner cavity of the blade, bristles are pressed tightly to the inner surface of the cavity of the blade, the treated surface of the blade is brought into contact with the granules, brush is brought into reciprocation, the granules are moved through the cavity of the blade and its perforations and the blade is treated.

EFFECT: high quality and uniformity of processing perforated holes in hollow blades of a turbomachine while increasing processing efficiency.

5 cl, 3 dwg