CONTINUOUS ROLLING MILL Russian patent published in 2010 - IPC B21B17/00 B21B27/06 

FIELD: metallurgy.

SUBSTANCE: invention relates to field of metal deformation process, particularly to manufacturing of pipes and cylindrical products and can be used at manufacturing of seamless hot-rolled pipes at continuous rack-and-gear, reducing and calibrating lengthwise rolling mills, rolling mill contains stand, removable stand of rolls, casings with cylindrical cartridges correspondingly to umber of rolls, filled by briquettes of solid lubrication, located with ability of forced displacement and connected to cooling system. Casings are installed from input side of mills. Cartridges are located in casings with ability of displacement lengthwise rolling axis and with fixation in particular position. Cavities of cartridges are connected to each other by pipelines. Each cartridge is implemented with cavity on internal surface lengthwise generatrix, particularly remote from rolling axis. Cavity is implemented with extension, directed into side of roll. Surface of cavity forms with external surface of briquette fissure cavity in the form of nozzle, located symmetrical to roll profile. Width of cross-section of cavity is selected from ratio 0.1÷0.2B≤b≤0.8÷0.9B; where B - width of roll profile, mm, b - width of cross section of cavity, mm.

EFFECT: invention provides increasing of rolls durability, accuracy of geometry of pipes and yield increasing.

2 cl, 5 dwg, 1 tbl, 1 ex