Patent ID: 6039634
Filing Date: 2000-03-21
Classification: B23Q,B24B

Abstract:
A method for finishing rotationally symmetrical workpiece surfaces, wherein a hardened workpiece which has been premachined leaving an overmeasure is clamped into a rotationally driven workpiece spindle of a grinding machine and is machined using a grinding tool effecting the removal of part of the overmeasure, the grinding tool rotating about a tool axis which is variably eccentric with respect to the workpiece spindle and/or to the rotationally symmetrical workpiece surface to be machined, the grinding tool further being advanceable perpendicularly to the workpiece surface and being oscillatingly displaceable parallel with respect to the workpiece surface, and wherein before the grinding process a lathe tool comprising a drill shank having a cutting edge for internal hard turning or for external hard turning is exchanged into a coaxially aligned position with respect to the workpiece spindle and/or the rotationally symmetrical workpiece surface to be machined in place of the grinding tool, the lathe tool being rotated about an axis which is aligned with respect to the axis of the workpiece spindle and being advanced axially in the direction of the workpiece while effecting a machining which removes part of the overmeasure.