TWO-ROLL STAND OF HELICAL ROLLING MILL Russian patent published in 2000 - IPC

FIELD: rolled stock production, namely stands for helical rolling, possibly of tube rolling and ball rolling mills. SUBSTANCE: drums are mounted in turnings of stand housing. Cartridges with rolling rolls are mounted in said drums with possibility of rotation. Screwdown mechanisms for moving drums have rotation drive units. Each unit includes electric motor, clutches, reduction gears and disengaging coupling for reduction gear of one screw of screwdown mechanism. Screws of said mechanisms engage with cartridges through sphere thrust bearings secured to them by means of screws mounted with gap in turning of sphere thrust bearings. Each apparatus for forcing cartridges to screws of screwdown mechanisms includes hydraulic cylinder, stopper unit, tie bar passing through rod of hydraulic cylinder and fixed by its threaded end with the aid of nut, lock nut and washer; head of tie bar is joined with rotation axle of cartridge. Stopper unit includes adapter fit onto rod and resting upon its end, thrust bearing mounted on adapter and engaging with end face of washer and coupling nut joined with adapter by thread joint and embracing thrust bearing and washer. EFFECT: improved design of rolling stand providing simplified process of adjusting rolling mill for reduced time period. 5 dwg