METHOD FOR COLD ROLLING OF RODS Russian patent published in 2001 - IPC

FIELD: rolled stock production, namely processes for pair rolling with separation of rolled pieces, possibly manufacture of cylindrical rods of non-ferrous metals and alloys. SUBSTANCE: method comprises steps of multipass reduction of blank between grooved rolls for making paired pieces with bridge and separation of rods in last pass. In order to enhance rod surface, distance between rolling axes of double roll grooved pass is set more than that in prefinal pass by 2-4 width values of bridge. Distance between neutral line and parting line of roll grooved pass in zone of bridge is equal to 4-7 thickness values of bridge. Rods are reduced in such pass with elongation factor 1.02-1.06. EFFECT: enhanced quality of rod surface due to elimination of burr occurring in zone of rod separation. 1 tbl, 1 dwg, 6 ex