ELECTRICAL DISCHARGE MACHINING METHOD FOR TURBINE BLADE, AND ELECTRICAL DISCHARGE MACHINING DEVICE FOR TURBINE BLADE USED THEREIN

摘要

PPROBLEM TO BE SOLVED: To provide an electrical discharge machining method for a turbine blade, capable of improving productivity and machining precision. PSOLUTION: Using a rough-machining discharge electrode, an initial outline of a blade 120 is formed at an upper part (first part) 310 of a disc material 300, and then a fine-machining discharge electrode 232 is inserted to a rough-machined space 310' formed by the rough-machining discharge electrode for conducting fine-machining to the blade 120. A plurality of the fine-machining discharge electrodes 232 are used to simultaneously machine a plurality of blades. After that, the disc material is inverted to put a lower part (second part) upward, and a similar process is repeated. PCOPYRIGHT: (C)2006,JPO&NCIPI