METHOD FOR PROCESSING EDGES OF LAMINATED TORSION BAR OF HELICOPTER ROTOR AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC C25F3/24 C25F7/00 B23H3/08 B64C27/04 

FIELD: technological processes.

SUBSTANCE: invention relates to electropolishing and electric treatment of parts from alloyed steels based on ion transfer and can be used for rounding edges of plate-like parts, for example torsion of rotors of helicopters. Proposed method comprises assembly of torsion bars into package with alignment of contours and processing of edges in package. Note here that torsion bar assembly is performed via flat gaskets repeating torsion contour with distance from edges to allow free access to torsion bar machining with superimposition of screens repeating configuration and location of gaskets on outer surfaces of extreme torsion bars. Package of torsion bars is immersed in medium of granules made of anion exchangers impregnated with solution of electrolyte, which provides electric conductivity of granules and ion breakdown of metal. Granules are brought into vibration motion ensuring uniform flushing of torsion bar edges. An electric potential is supplied to the torsion and granules, which ensures rounding of edges and obtaining of the specified roughness of the surface. Device consists of package holder and device for processing edges of torsions in medium of granules.

EFFECT: increased quality of polishing and rounding of laminated torsion bar edges, and also improved performance of torsion bars with reduction of labor intensity of processing process.

10 cl, 3 dwg