METHOD OF MANUFACTURING SHAFT FOR STEERING APPARATUS

摘要

A shaft for the steering system in which a plurality of groove portions is formed according to the boundary surface is molded to the drawing method, therefore the shaft processing method for the steering system planning the improvement of workability and productivity is provided. A shaft processing method for the steering system comprises a first thermal process(10) heat-treating the metal material(100) of the rounded rod type hand; a first machining process(20) cutting and processes the leading end of the heat-treated metal material as described above and forms the sharp edge(100a); a first shot process(30) jetting the short ball of the high pressure on the surface of the metal material in which machining is completed and removes the foreign material; a first membrane progress(40) deciding on the surface of the metal material from which the foreign material is removed with plating; and a first drawing process after it inserts the metal material treated with a film as described above to the hole of dice, it draws the metal material while injecting the drawing oil to hole and of performing a pultrusion process to the intermediate element in which the imperfect groove portions of shape are formed with the external diameter.