DIE FOR COLD HEADING OF PARTS OF COMPLEX PROFILE Russian patent published in 2024 - IPC B21J13/02 B21J5/08 

FIELD: metal forming.

SUBSTANCE: invention can be used in production of parts by cold heading. Die comprises insert with outer conical surface and cavity with diameter difference. Stepped holes are located radially at the point of difference in diameters. Insert is pressed into the shroud ring having a cylindrical groove and at least one hole on the inner surface at the point of exit of the radial holes of the insert. Hole connects the cylindrical groove with the longitudinal groove made on the outer surface of the shroud ring. Number of insert holes is equal to number of longitudinal grooves. Insert with shroud ring is pressed into housing with variable interference. Interference is formed by different value of difference between inner diameter of housing and outer diameter of shroud ring at opposite ends of die.

EFFECT: as a result, higher cyclic durability and strength of the die is provided.

1 cl, 2 dwg