METHOD FOR DRAWING WIRE AND BUILTUP DRAWING DIE FOR PERFORMING THE METHOD Russian patent published in 2003 - IPC

FIELD: tools and processes for making wire by drawing. SUBSTANCE: method is realized at successively reducing gap between blank surface and cylindrical portion of duct of each next pressure draw plate in such a way that gap in last draw plate exceeds by 1.4 - 1.6 times thickness of lubricant layer in working draw plate. Builtup drawing die includes row of drawing dies, namely it includes successively mounted at least one pressure draw plate and working draw plate pressed in grooves of solid mandrels and sealing rings arranged between drawing dies. Each sealing ring is placed in free portion of the same grooves of mandrels in which dies are pressed in. Sealing ring made of elastic material has groove at inner side. EFFECT: reduced drawing effort, enhanced strength of working draw plates due to increased hydrodynamic pressure of lubricant directly in deformation zone, simplified process of assembling and making drawing dies. 2 cl, 1 dwg