METHOD FOR PRODUCTION OF ROD-TYPE PRODUCTS WITH A HEAD AND A CONICAL PART Russian patent published in 2021 - IPC B21K1/46 

FIELD: metal processing.

SUBSTANCE: invention relates to the processing of metals by pressure and can be used in the manufacture of rod products with a conical part such as shafts, axles, fingers on cold-upsetting equipment. After cutting the workpiece, the preliminary and final extrusion of the conical part of the product is carried out. Pre-extrusion is carried out with a relative deformation of 0.31-0.72 when the ratio is 1.2≤D_st2/d₂≤1.9, where D_st2 is the diameter of the rod at the stage of pre-extrusion of the conical part, d₂ is the diameter of the conical part at the stage of pre-extrusion. After reducing the rod, the final extrusion of the conical part is carried out with a total relative deformation of 0.75-0.9.

EFFECT: as a result, a conical part is obtained on rod products by cold extrusion.

1 cl, 1 dwg