Manufacturing method of carless welding wheel

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a manufacturing method for a vehicle-free welding wheel for manufacturing a wheel used in various vehicles such as automobiles and motorcycles without welding.;The present invention relates to a method of manufacturing a molded product, which comprises the steps of forming a regular flat iron into a metal mold to form a recessed portion 10 and an inlet thereof through a primary fallopian tube 11, forming a hole 12 in the center of the recessed portion, 11. The method according to claim 1, further comprising the steps of: cutting the primary rim (20) by a rim-forming press, To form an edge portion of the hole so as to form a horizontal plane with the wheel body (40); a step of forming a secondary tubular tube (14) by molding the inlet formed with the horizontal plane into an expansion press; And pressurized by a press to form the secondary rim (30).;The present invention is a manufacturing method using a series of press molding methods as described above. As a conventional welding means is removed, specialization in welding, additional construction for welding, grinding and the like are eliminated, and workability is further improved. Particularly, according to the present invention, there is no defective product because there is no welded part, and since the strength of the whole wheel is uniform and excellent concentricity is maintained, there is no shaking of the tire during running and the wear of the related component is delayed.