Method for Manufacturing Hollowed Coil and Using for Generator Hollowed Coil and Method for Manufacturing thereby

摘要

This invention relates to a method for producing a hollow coil, the method of manufacturing them, including a generator rotor and a generator coil relates to a rotor device. To producing a hollow coil in accordance with an embodiment of the present invention is to remove the oxygen and gas phase, in the electrolytic copper dissolved in a high-frequency induction melting to put the copper in a high-frequency induction that step, is put on a method comprising dissolving the oxygen gas is removed, and after the high-frequency induction melting in a copper, copper dissolved in hot water and the predetermined shape after analyzing step for analyzing matter content and the silver content of the silver component in the the melting and casting process comprising: a step for producing, melting and casting a predetermined shape is punched into a specified pipe and extruded to the extrusion process step, perforations are extruded predetermined heat treatment process and heat treatment step of heat treating the tube that a predetermined tube and to include the annealing process step by drawing to drawing and annealing at least once.