Abstract: The invention relates to a workpiece (1), in particular a rotor disc, an impeller or guide wheel for a turbine, for a pump or for a compressor, including a base body (2) with a guide vane (3), wherein the guide vane (3) is welded in notch-free manner to the base body (2) and/or to a cover part (4). Furthermore, the invention relates to a welding method for the manufacture of a workpiece (1).

Abstract: In a manufacturing method for closed vane wheels having vanes (2, 2a) between which vane channels (3) are formed which have a predefined shape, openings for the vane channels are prepared by means of a program-controlled chip forming cutting apparatus in a blank in a chip forming cutting process. In the manufacturing method, in a further workstep, electrodes (11) of an apparatus for spark erosion or for electrochemical stock removal are additionally introduced into the openings and a part of the predefined shape of the vane channel (3) is manufactured by means of spark erosion or by means of electrochemical stock removal.

Abstract: The invention relates to a workpiece (1), in particular a rotor disc, an impeller or guide wheel for a turbine, for a pump or for a compressor, including a base body (2) with a guide vane (3), wherein the guide vane (3) is welded in notch-free manner to the base body (2) and/or to a cover part (4). Furthermore, the invention relates to a welding method for the manufacture of a workpiece (1).

Abstract: The invention relates to a machining method for the machining of a workpiece (1) by means of a machining apparatus, including a control and/or regulating unit and a program-controlled data processing unit as well as a manipulator with a machining tool (2) for the manufacture of a three-dimensional structure (3) by machining the workpiece (1) in the region of a curved guide surface (4).