ROLL GROOVED PASS SYSTEM FOR COLD ROLLING OF SHAPED CONTACT WIRE Russian patent published in 2001 - IPC

FIELD: manufacture of contact wire in continuous cold rolling mills with stands having mutually normal rolls. SUBSTANCE: system includes six shaping roll grooved passes - initial, preliminary, preparative, rough, prefinal and final, all formed by grooves of two rolls in such a way that contour of final pass corresponds to cross section of ready contact wire and size of contours of roll grooves of previous passes depend upon size of contours of roll grooves of subsequent passes. Use of two additional shaping roll grooved passes having predetermined contour instead of oval and round ones provides lowered residual stress in wire cross section, increased rectilinearity of wire. EFFECT: possibility for making high quality contact wire of copper and high- strength wear resistant copper alloys. 6 dwg