DOUBLE-STAND UNIT OF THREE-ROLLER STANDS Russian patent published in 2000 - IPC

FIELD: plastic metal working, namely apparatuses for drawing. SUBSTANCE: double-stand unit of three-roller stands includes foundation with struts, roller holders with non-driven rollers jointly mounted and inclined one relative to another by 120 degrees; mechanisms for individual radial adjustment of rollers having pressure screws and release springs and mechanism for group-type radial adjustment of rollers. Roller holders are mounted on heavy guide secured to strut; they are in the form of screw with central opening, have in its rear end protrusions spaced by 120 degrees and openings for axles of joints. Said guide may perform reciprocation motion normal relative to strut of stand by means of rotating nut fixed against axial motion. Nut engaging with threaded portion of guide has rim joined with worm mounted in strut of stand. Roller bearing assembly is mounted in double-stand unit in sleeve fixed in roller holder by means of axle. Struts of stands are joined one with another by means of four braces. Lower braces are secured to foundation of double-stand unit. EFFECT: lowered size and mass of unit, enhanced accuracy of rolled sections due to elimination of axial clearance in roller assembly. 4 cl, 6 dwg