BEARBEITUNGSVORRICHTUNG FUER KOLBEN

摘要

A piston turning machine comprising an elongated shaft structure for rotating a pistong having a skirt which is to be machined to a non-circular shape wherein a cylindrical cam corresponding in cross-sectional shape to the shape desired for the piston skirt is interposed in the shaft structure at a position spaced sufficiently from the piston so that metal removed from the skirt does not encumber the cam. A cam follower and a turning tool are mounted on a reciprocable tool bar so that movement of the follower on the cam is translated into movement of the tool toward and away from the skirt in a manner such that for each increment of follower movement a reduced increment of tool movement is obtained to thereby minimize the effect of dimensional tolerance variations in the cam on the final shape of the piston skirt.