PIPE COLD ROLLING MILL Russian patent published in 2010 - IPC B21B21/00 

FIELD: technological processes.

SUBSTANCE: invention relates to the field of pipe rolling, more precisely, to pipe cold rolling mills made of carbonaceous, alloyed and stainless steels. Mill comprises frame with guides, working stand with movable power bed plate, support rails, geared racks and movable cassette with working rolls, and also double-arm lever of drive, connecting rods of which by means of axles are connected to movable force bed plate and to movable cassette. At connecting rods axles that connect double-arm lever to cassette there are self-centering sliders fixed. On movable power bed plate on both sides of rolling axle there are support beams fixed with upper and lower rolls with gears that are engaged to each other. Under support beams there are additional racks that interact with gears of lower rolls. Lower rolls are distanced from each other to the maximum, and upper rolls are brought to each other as near as possible. Each support beam is arranged with a vertical slot that embraces bed plate, which has two horizontal slots in the area of support beam installation, one of which is arranged parallel to axis of rolling, and the other one - perpendicular to axis of rolling, which cover according ledges in support beam.

EFFECT: use of invention makes it possible to increase service life of mill and to improve quality of rolled pipes made of hard-to-deform material due to prevention of tilting of movable bed plate with cassette, reduction of guides wear and increased rigidity of working stand.

12 dwg