METHOD OF RECONDITIONING OF PISTONS Russian patent published in 1996 - IPC

FIELD: mechanical engineering; repair of pistons of internal combustion engines. SUBSTANCE: width of worn out grooves for compression and oil control rings of piston is restored by fitting in and fixing additional repair part in each groove. Prior to fitting in repair part, one of side surfaces of groove is cut groove bottom is made deeper and side surfaces in bottom portion of groove are cut to form dovetail. Having fitted and fixed repair part in groove, of required size is cut impart and is displaced towards non-machined side surface through required size. Bottom of groove is deformed for rolling metal of repair part into dovetail. EFFECT: enlarged operating capabilities. 3 dwg