Three-edged needle feeding device for electrical discharge machining

The invention belongs to the technical field of three-edged needle production and machining, and particularly relates to a three-edged needle electrical discharge machining needle feeding device which comprises a bottom plate and a supporting frame, the supporting frame is located on one side of the bottom plate, a needle box and a needle feeding mechanism are sequentially arranged on the supporting frame from top to bottom, and a needle falling opening is formed in the bottom of the needle box; the needle ring is of a horizontally-arranged cylinder structure and rotationally installed on the needle feeding base, the needle ring is connected with the needle feeding motor, at least two needle feeding grooves parallel to the central axis of the needle ring are evenly distributed in the peripheral face of the needle ring at intervals, a needle supporting frame is arranged at the upper end of the bottom plate, a needle supporting groove is formed in the upper end of the needle supporting frame, and the needle sup