METHOD OF PREPARATION OF ROLLING MILL WORK ROLLS

FIELD: metallurgy; rolling. ^ SUBSTANCE: invention can be used for preparation of work rolls of hot and cold rolling mills. Proposed method of preparation of work rolls of rolling mill includes forming barrels to shape made to contour defined by polynomial up to fifth degree y(x) = a5x5 + a4x4 + a3x...

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Hauptverfasser: BARYSHEV VADIM VLADIMIROVICH, MAZUR SERGEJ IVANOVICH, TRET'JAKOV VLADIMIR ARKAD'EVICH, TISHCHENKO DMITRIJ ALEKSANDROVICH, SAVOCHKIN ANDREJ GENNAD'EVICH, VARSHAVSKIJ EVGENIJ ALEKSANDROVICH
Format: Patent
Sprache:eng ; rus
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Zusammenfassung:FIELD: metallurgy; rolling. ^ SUBSTANCE: invention can be used for preparation of work rolls of hot and cold rolling mills. Proposed method of preparation of work rolls of rolling mill includes forming barrels to shape made to contour defined by polynomial up to fifth degree y(x) = a5x5 + a4x4 + a3x3 + a2x3 + a1x where x is coordinate along axis of roll with beginning in middle of barrel. Redressing of rolls is carried out in state it is heated in process of rolling, on NC roll-grinding machines and then roll is loaded into stand. Prior to dressing, temperature of surface is measured along length of roll barrel in three points minimum, and values of coefficients a2 and a4 in polynominal of roll profile at dressing are reduced, respectively, by a2 =(1-k)2alphaD tc/L2 and a4 = k8alphaD tc/L4 where D and L are diameter and length of roll barrel; alpha is linear thermal expansion coefficient of roll material: tc is difference of surface temperature in middle and half sum of temperatures at ends of roll barrel; k = 0 at dressing of roll to polynominal of third degree and k = -0.65 at dressing of roll to polynominal of fifth degree. ^ EFFECT: increased service life of rolls and accuracy of adjustment of rolled strip profile. ^ 2 tbl, 2 dwg