Machine for machining the shoulder surfaces of piston or other annular rings

摘要

930,052. Electrolytically grinding piston-rings. GOETZEWERKE FRIEDRICH GOETZE A.G. Feb. 21, 1962 [March 30, 1961], No. 6768/62. Class 41. An apparatus for precision machining of both sides of a piston-ring electrolytically, consists of a receiving plate 5 holding a series of pistonrings 7 spaced around the periphery, which plate revolves so that the piston-rings pass between two abrasive elements 3 mounted at the edge of a pair of discs 2, 3. The discs may contra-rotate, whereby the piston-rings rotate on their seating during grinding. The rings are connected as anodes, the grinding discs as cathodes and are fed with electrolyte passing upwards through the two hollow independent spindles 8, 9.