MANUFACTURING METHOD FOR HIGH PRECISION HELICAL GEAR BY COLD EXTRUDING ALLOYED STEEL

摘要

The present invention relates to a method for manufacturing a high-precision helical gear by cold extrusion of an alloy steel, comprising: a shearing process of cutting a metal rod into an appropriate size; An extrusion molding process of molding the metal material cut in the shearing process; In the method of manufacturing a high-precision helical gear by cold extrusion of an alloy steel consisting of a finishing process of removing unnecessary parts and surface treatment of an extruded molded article, the extrusion process is a conical molding by compressing a metal material entered into a die with a ram A first step of making; A second step of forming the conical shaped metal material in the first step into an uneven shape in a flow direction; A third step of forming a tooth tip and a pitch of the spur gear on the uneven shape of the metal material formed in the second step; A fourth step of forming the root of the spur gear from the metal material formed in the third step; In addition, the fourth step of forming a spiral angle to the spur gear teeth of the metal material molded in the fourth step characterized in that it comprises a.