Method for controlling machining precision of UHP phi 650 mm graphite electrode connector

The invention discloses a method for controlling the machining precision of a UHP phi 650 mm graphite electrode connector. The method comprises the following steps: performing precision control on stations, performing precision control on a joint thread chaser, and performing precision verification control on pre-assembly of an electrode and a joint. The stations comprise a double-end flat end face station, an electrode and central hole drilling station, a double-end outer cone turning station and a double-end thread milling station during precision control of the stations; when the joint thread chaser is subjected to precision control, a plurality of thread geometrical parameters of crest straightness, root straightness, tooth height, root width, single-tooth pitch, one-inch accumulated pitch, full-length accumulated pitch and tooth form half angle of the joint thread chaser are tested; and in precision verification control of pre-assembly of the electrode and the joint, the graphiteelectrode and the joint a