METHOD OF RESTORATION OF CONTACT SURFACES OF TURBINE ROTOR BLADE PLATFORMS Russian patent published in 2003 - IPC

FIELD: aircraft manufacture; construction of gas-turbine engine turbines; restoration of contact surfaces of turbine rotor blade shroud platforms. SUBSTANCE: proposed method includes dressing and smoothing contact surface terminating in radius angular groove and welding wear-resistant material on this contact surface. Prior to welding wear-resistant material on contact surface, contact surface is subjected to dressing and smoothing for forming of technological projection before radius angular groove. Then, contact surface is subjected to machining and deepening of groove for removal of technological projection. Groove is deepened to depth not exceeding thickness of contact surface being restored; sides of groove are made at angle of 35 to 75 deg. EFFECT: increased service life of blades; enhanced reliability; minimization of concentration of stresses and reduced cracking. 3 cl, 4 dwg