SIZING TOOL FOR TUBE ROLLING MILL Russian patent published in 2006 - IPC B21B17/14 

FIELD: technological sizing tool for reduction tube rolling mill.

SUBSTANCE: sizing tool includes several successively arranged two-roll reducing shaping roll grooved passes and multi-roll passes for final sizing and straightening of ready product. Said shaping roll grooved passes are arranged according to strict order without angular shift of their parting planes. Profile of cross section of shaping rolls of each next pass is formed by recesses and protrusions with curvilinear and (or) rectilinear surfaces with possibility of proportional geometrical approach to shape of ready product. It is achieved due to satisfying condition of equal values of summed perimeter of grooved rolls of each stand and outer perimeter of initial blank. Profile of finish roll grooved passes is identical to outer contour of ready product and it is possible to adjust it in admissible range while using sixteen reduction shaping stands and four finish passes. According to invention it is possible to act upon stress- deformed state of metal in deformation zone for making preset-contour section of widely used in industry welded tube 114 x 3 mm in manufacturing mode optimal from view point of metal state, deformation intensity and comfortable condition of tool operation.

EFFECT: simplified design and manufacturing process of rolls, improved accuracy of products, lowered energy consumption.

2 cl, 5 dwg