Abstract: A method for production of a rotor for centrifugal compressor, wherein the said rotor is produced from a monolithic disc, which is provided with a central hole. The method consists of use, within an isolating medium, of at least one first electrode which has polarity opposite the polarity of the rotor, wherein the said first electrode operates starting from the outer diameter of the monolithic disc, in order to produce the blades and the cavities of the said rotor, and wherein the processing takes place with a continuous path, consisting of a first step of roughing, followed by a second step of finishing with a tool which has a shape similar to that of the electrode used for the first roughing step, in order to produce an accurate geometry of the blades.

Abstract: A method for production of a rotor for centrifugal compressors, wherein the said rotor is produced from a monolithic disc (10), which is provided with a central hole (11). The method consists of use, within an isolating medium, of at least one first electrode which has polarity opposite the polarity of the rotor, wherein the said first electrode operates starting from the outer diameter of the monolithic disc (10), in order to produce the blades (14) and the cavities (13) of the said rotor, and wherein the processing takes place with a continuous path, consisting of a first step of roughing, followed by a second step of finishing with a tool which has a shape similar to that of the electrode used for the first, roughing step, in order to produce an accurate geometry of the blades (14).