Study on Electro-Discharge Machining Technology of Superalloy Impeller

摘要

Electro-discharge machining (EDM) is one of the preferred machining methods for closed impeller. A 3D model of the closed impeller was obtained by using three-dimensional software. Combined with EDM processing method, two kinds of partition schemes were proposed and a better partition scheme was gotten. A set of electrodes were designed based on the partition scheme. Motion simulation and interference checking were carried out. Experiments were conducted and a qualified closed impeller was machined successfully. So the design method for electrodes and the feasibility of processing are proven.