METHOD FOR RESTORING OPENINGS IN BODY PARTS Russian patent published in 2001 - IPC

FIELD: restoration of seats for inserts of crankshaft bearings of cylinder units of internal combustion engines and piston compressors. SUBSTANCE: method comprises steps of preliminarily applying onto surface of openings electric-spark coating with use of copper electrode having cross section area (5-20)sq. mm at pulse frequency (200-250)Hz and electric current value (15-20) A; turning opening of coated part until diameter exceeding nominal diameter by (0.1-0.2)mm; then applying and shaping by means of mandrel polymeric composition with next relation of ingredients (meas.): anaerobic sealing material - (99-101); bronze powder - (2-3), talc - (20-30). Mandrel is mounted in supports related to shop technological bases. EFFECT: highly uniform polymeric coating, dimensional and geometrical accuracy of restored mounting openings. 2 cl, 5 dwg