Method for producing a plate of a turbomachine

A method for producing a plate or disk of a turbomachine having an axis of rotation and receiving grooves to respectively receive blade roots of the turbomachine, comprising the steps of:

• providing a circular disk having a cylindrical peripheral surface, a first face and a second face;
• introducing the receiving grooves into the peripheral surface of the disk by two-step processing, having a first step and a second step;
• first step processing of pairs of grooves, each of which to extend in a straight line from the first face of the circular disk to the second face of the disk, so that from each point of a cross-section of a receiving groove on the first face to the corresponding point of a cross-section on the second face and wherein a straight line delimits the grooves;
• and wherein the grooves have a tolerance allowance of 0.1 to 1 mm after the first step of processing;
• wherein the first step of processing is performed simultaneously for less than all of the of the grooves at a time;
• wherein less than all of the grooves is a pair of grooves;
• second step processing of the grooves previously processed in the first processing step using electrochemical material processing with an electrode having a wedge-shaped region and wherein the wedge shape tapers in the direction of the feed direction, the second step processing further fine processes the grooves to a final contour;
• the wedge shaped region includes an electrode tip and inclined surfaces at the electrode tip;
• wherein the first step and the second step of processing are carried out by electrochemical material processing and a plurality of grooves are simultaneously introduced into the disk at regions located opposite a central axis of rotation of the disk.