Goetze Ag

Jochen Stechow

Otto Feller

Manfred Brocksieper

Heinz Oepen

Rolf Luckger

Hans-Gerd Kroschel

A method of making self-tensioning rings, including the steps of circumferentially machining an out-of-round ring blank on inner and outer surfaces thereof and subsequently cutting a ring segment out of the ring for obtaining a ring gap therein; measuring a circumferential contour of the ring subsequent to the machining step; and calculating the circumferential length of the ring segment and a cutting angle for removing the ring segment from the ring as a function of data obtained in the measuring step.

Method and apparatus for making piston rings

For the out-of-round shaping of workpieces, subsequent to the circumferential machining of a first workpiece or workpiece stack, the actual contour thereof is traced, then compared with the predetermined desired contour and the obtained deviations between the desired contour and actual contour are used for the correction of the desired contour for further machining.

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Leichlingen, Germany

Jochen Stechow