Method for searching maximum free movement stroke track of electrode in electrosparking of closed blisk

A method for searching a maximum free movement stroke track of an electrode in electrosparking of a closed blisk is characterized in that an electrode feeding stopping position is treated as an optimal track starting point, a position where the whole electrode moves out of a flow channel is treated as an optimal track end point, a vector direction that the center of the end surface of a head part of the electrode points to the center of the end surface of a tail part of the electrode is treated as a reference direction of the electrode movement, and on that basis, the process that the electrode moves from the optimal track starting point to the optimal track end point is divided into a plurality of stages; the electrode translates from one movement node of each stage along the reference direction without interference to obtain the next movement node of the same stage, and meanwhile, the posture of a rotating shaft of the electrode is adjusted in each movement node; all movement nodes can be obtained after the electrode moves out of the flow channel without interference, and all nodes can be smoothly connected to form a complete optimal track; the optimal track is subjected to coordinate transformation to obtain an interference-free feeding track. The method is applicable to flow channel structures of various shapes, is high in success rate of searching the optimal track, can achieve multi-shaft linking, and is high in processing efficiency.