Study on the VCRplus Back-Up Roll Contour of 1500 mm CVC Mill

The back-up rolls of hot strip mills wear considerably under the conditions high temperature and heavy load, which affects roll service period stability profile control. Serious uneven wear, short periods, spalling problems occurred on conventional upstream stand CVC in 1500 mm continuous rolling production lines. Through finite element simulations, are determined to be caused by configuration a flat contour work roll, leads contact pressure between rolls. distribution form is ‘anti-CVC’ shape, there peak both sides body. In particular, long-term negative shifting site further increases rolls, resulting accident. Based design technology VCR contours with variable lengths, considering cooperation middle contour, has been improved. designed VCRplus was analyzed evaluated simulation, including control effect bending force, transverse stiffness gap. simulation results show that can effectively improve force Industrial tests demonstrate have advantages uniform enhanced self-sustaining extension life. now stably put into industrial production, capacity during extended from 150,000,000 kg 250,000,000 kg.