Magnitogorsk State Technical University (Magnitogorsk, Russia):

V. A. Kharitonov, Cand. Eng., Prof.
I. V. Taranin, Post-Graduate, e-mail: taranin.iv@mail.ru

The paper presents the generalized results of research of metal stress conditions in deformation zone at the cold bar rolling, using the modern remedies of computer simulation. It is shown that wire rolling by any grooves is accompanied by the effect of longitudinal tensile stresses in deformation zone, which reduce metal ductility resource. To enhance deformation efficiency, two options of modular arrangement of deformation equipment are offered; they can be used as part of a rolling mill or the drawing machine as the module "rolling-compaction" and the module "drawing-rolling with overpressure". These modules implement the combined process of wire deformation with applying a force of rear overpressure by using the reserve forces of friction at rolling. Efficiency of wire deformation using the proposed modular routes is higher in comparison with the conventional drawing or rolling, owing to lower level of longitudinal tensile stresses acting in the deformation zone. The universal layout of the equipment of a rolling-drawing mill is offered. It allows, in the case of coinciding of deforming modules, to increase maximally the total possible deformation degree of the wire semiproduct and to improve the mechanical properties of the finished wire.

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