WIRE THINNING METHOD AND APPARATUS WITH USE OF ROLLING THEORY Russian patent published in 2007 - IPC B21F9/00 B21C1/00 

FIELD: plastic working of metals, possibly in different branches of machine engineering.

SUBSTANCE: method comprises steps of thinning wire of metals or alloys by drawing and successively bending it at winding wire around pivots mounted one near another and rotating around their axes; straightening wire after each bending operation; controlling wire diameter by regulating number of wire bending and unbending operations. Pivots may have the same diameter and gradually decreasing diameter and they are mounted in such a way that to provide rolling friction in struts. Apparatus for thinning wire of metals and alloys includes pivots mounted with possibility of rotation around their axes; struts for rewinding wire. Apparatus also includes struts made of hard materials and designed for mounting pivots with possibility of rolling friction.

EFFECT: wire thinning without use of high-cost diamond, hard-alloy drawing dies and different lubricating materials due to using theory of rolling instead of friction theory.

5 cl, 9 dwg