METHOD FOR REDUCING THE ECCENTRICITY OF THE INNER SURFACE RELATIVE TO THE OUTER SURFACE OF A HOLLOW WORK PIECE ROTATABLY CLAMPED INTO A MACHINE TOOL

摘要

The invention relates a method for reducing the eccentricity of the inner and outer surface (7, 9) of a hollow workpiece (1), in particular a hollow shaft, rotatably clamped in machine tool (2), in which in one clamping a plurality of measurement data depending on the contour of the inner surface (7) of the hollow workpiece (1) are recorded, in particular with the aid of ultrasound, using the recorded measurement data a desired surface (13) is calculated for at least a part of the outer surface (9), which has a reduced eccentricity with respect to the inner surface (7) and in a further step the rotating workpiece (1) is at least partially machined at the outer surface (9) thereof according to the desired surface (13). In order to produce special method conditions, according to the invention on the outer surface (9) of the workpiece (1) at least one sub-surface (14, 15) is produced by machining, according to the calculated desired surface (13) and the workpiece (1) is reclamped using at least the generated sub-surface (14, 15) and by means of clamping means (3, 4), in particular a clamping chuck (3') and/or steady rest (17), after which in said new clamping at least the remaining outer surface (9) of the rotating workpiece (1) is at least partially machined in order to reduce the eccentricity of the inner surface (7) with respect to the outer surface (9).