The invention discloses a method for
machining an elliptical end socket. The method includes the following steps that first, discharging is performed; second,
welding is performed; third, cold pressing is performed so that preliminary forming is achieved; fourth, end socket pressing is performed, wherein integral forming is performed through pressing so that a semi-finished end socket can be obtained; fifth, cold
spinning is performed, wherein the semi-finished end socket is subjected to cold
spinning so that final forming is achieved; sixth, heat treatment is performed, wherein the temperature of an empty furnace is raised to 400 DEG C, the end socket is put into the furnace and heated to 500 DEG C to 600 DEG C, the temperature is kept for 20 minutes to 30 minutes, the temperature is lowered to 400 DEG C, and the end socket is taken out of the furnace and naturally cooled; seventh, grooving and
grinding are performed; eighth,
acid washing is performed, wherein acid wash is evenly smeared onto the whole outer surface of the end socket, preliminary washing is performed, and then the end socket is washed clean with
clean water. According to the method, heating is not performed before forming, and materials can not degrade; the cold pressing, the end socket pressing and the cold
spinning are adopted for forming, and changes of size can not be caused; a passive film is formed on the surface of the end socket through
acid washing; harmful gas and
smoke can not be generated.