DIE SET FOR EQUAL-DUCT ANGULAR PRESSING

摘要

FIELD: plastic metal working with use of plastic deformation, namely manufacture of nano-crystalline materials with improved mechanical properties. ^ SUBSTANCE: die set includes bandage to which cone insert having four parts is pressed -in; lower support; inlet and outlet ducts of the same rectangular cross section; and ram. Parts of cone insert are made in such a way that they are defined by two mutually crossing planes and by portion of cone surface cut off by said planes. Rib formed by means of two mutually crossing planes in each part of cone insert is cut off by such a way that assembled parts of insert define inlet duct with three portions. Two portions have rectilinear walls; one portion has helical walls. The last portion is arranged between said portions with rectilinear walls. Outlet duct is restricted by lower support and by two adjacent parts of cone insert having grooves in its lower end. ^ EFFECT: enhanced intensity of plastic deformation of metallic blank, simplified design and increased useful life period of die set. ^ 7 dwg