Process for manufacturing one body double-stage turbine blisk, an apparatus using thereof, and one body double-stage turbine blisk manufactured thereby

摘要

The present invention relates to an electric discharge machining method for machining an integrated double-row turbine blisk with reduced weight and high structural safety compared to a conventional double-row turbine rotor, and an electric discharge machining apparatus using the same. In the electric discharge machining method of an integrated double-row turbine blade according to an embodiment of the present invention, an integrated disk comprising an upper plate corresponding to a first-row blade processing unit, a lower plate corresponding to a second-row blade processing unit, and a central shaft connecting them. Preparing the material, fixing the raw material to the electric discharge machining device so that the outer side of the first row blade processing unit faces upward, the initial contour of the first row blade using a discharge electrode for roughing on the outer side of the first row blade processing part A first-row blade outer roughing step of forming a first-row blade outer side roughing step, a first-row blade outer side finishing step of performing precise machining of the first-row blade by inserting a finishing discharge electrode into the roughing space formed through the first-row blade outer roughing step, the first-row blade The step of turning over the disk material so that the inner part of the machining part faces upward and fixing it to the electric discharge machining device, a first row blade forming an initial outline of the first row blade using a discharge electrode for roughing on the inner side of the first row blade machining part 1st row blade inner side finishing step of performing precision machining of the 1st row blade by inserting a finishing discharge electrode into the roughing space formed through the inner side roughing step, the first row blade inner side roughing step, For roughing the outer side of the 2nd row blade processing part The second row blade outer roughing step of forming the initial outline of the second row blade using the discharge electrode, and the finishing discharge electrode is inserted into the roughing space formed through the second row blade outer roughing step to perform precise machining of the second row blade 2nd row blade outer finishing step, turning over the disk material so that the inner side of the second row blade processing part faces upward and fixing it to the electric discharge machining apparatus, using the discharge electrode for roughing on the inner side of the second row blade processing part 2nd row blade inner roughing step of forming the initial outline of the row blade, and 2nd row blade inner side finishing to perform precision machining of the 2nd row blade by inserting a finishing discharge electrode into the roughing space formed through the second row blade inner roughing step step po do