WORKING STAND OF COLD ROLLING MILL OF PIPES Russian patent published in 2020 - IPC B21B13/18 

FIELD: pipelines.

SUBSTANCE: invention relates to pipe rolling, particularly, to design of working stands with movable roller housing. Working stand of cold rolling mill of pipes includes fixed bed, movable housing connected to drive with vertical rolls arranged in it. Rack-and-rack drives have gears arranged on rollers and racks. Lower rack is installed in the stationary housing, and the upper rack is fixed in the hinged housing. Stand also comprises wedges moved by screws, and fixing devices from longitudinal and transverse displacements of racks. Fixing devices from longitudinal shifts of racks are made for each rack in the form of wedge-like pair with built-in hydraulic cylinder. Fixing devices from transverse displacements of racks are made in the form of traverses connected by tie-rods to lower and upper racks, and two pairs of plunger hydraulic cylinders. One pair of plunger hydraulic cylinders is located between crossarm and stationary housing of lower rack, and another one is located between crossarm and swing case of top rack.

EFFECT: such design of the working stand of the cold rolling mill of pipes enables to increase annual productivity due to reduction of stand times at mill transfer; besides, quality of finished pipes is improved and reliability and durability of mill operation is increased due to application of separate fixation of racks from longitudinal and transverse displacements by means of hydraulic cylinders.

1 cl, 6 dwg