ROLLING METHOD AT CREATING PRESET STRESSED STATE ALONG CROSS SECTION OF BLANK AND BLANK FOR PERFORMING THE SAME Russian patent published in 2007 - IPC B21B1/02 

FIELD: production of flawless conversion bar or sheet blanks, ready large-size shapes.

SUBSTANCE: blanks are rolled till predetermined cross section in order to eliminate occurring of surface scabs at creating compression stresses in outer layers of blank by providing normalized relation of rolling parameters or to eliminate occurring of inner flaws at rolling large shapes in axial zone due to providing normalized rolling process parameters while taking into account roll diameter, height of blank before and after rolling stand, deformation resistance of axial zone of metal and its outer layers, stressed state coefficient, blank reduction value. Flawless products may be produced due to providing temperature drop along blank cross section. In first of said cases temperature is higher in outer layers and in second case temperature is higher in axial zone. In order to roll large-size shape, blank whose height in cross section is normalized by mathematical expression is used.

EFFECT: possibility for producing flawless rolled blanks.

3 cl