METHOD FOR MANUFACTURING DOOR HOLDER TYPE PRODUCT Russian patent published in 2021 - IPC B21K1/46 

FIELD: cold metal processing.

SUBSTANCE: invention relates to the cold processing of metals by pressure and can be used in the manufacture of fasteners. The formation of a door holder type product in the form of a rod with a thread and a head having a guide part, a hexagon and a cylindrical flange is carried out in three transitions. At the first transition, the billet is processed to obtain a conical part, the cylindrical section of the rod is reduced from the end of the head and the chamfer is formed at both ends. At the second transition, the guide part of the head is reduced along two conjugate radii with the change of shape of the head end and the simultaneous draft of the rod to obtain a cylindrical part. At the third transition, the formation is carried out by reducing a hexagon with a conical section adjacent to it, made at an angle of A=20°…45°. At the same time, a cylindrical flange is obtained by upsetting and the rod is reduced.

EFFECT: number of complex forming tools is reduced and the quality of the resulting product is improved.

1 cl, 1 dwg