Patent ID: 6324881
Filing Date: 2001-12-04
Classification: B21B

Abstract:
A method to control the profile of a strip (13) in a rolling stand for strip and/or sheet comprising at least two working rolls, respectively upper (11a) and lower (11b) and defining a reference pass-line (15) substantially coinciding with the center line of said strip (13), said rolls (11a, 11b) defining between them a transit gap (12) through which said strip (13) passes and is rolled and being supported at the ends by respective chocks, said method providing axial translation of said working rolls (11a, 11b) with respect to said pass-line (15), said working rolls (11a, 11b) each having a profile expressed with a cubic equation, the method comprising applying a first value (""s.sub.1 "") of axial translation to said upper working roll (11a) and a second value (""s.sub.2 "") of axial translation to said lower working roll (11b), s.sub.1 being .noteq.s.sub.2, such that said axial translation of said upper working roll and said lower working roll (11a, 11b) develops a symmetry in said transit gap (12), and compensating and leveling the asymmetry of the development of said transit gap (12) with respect to said pass-line (15) in the presence of said axial movement with different values (s.sub.1 and s.sub.2) of said upper working roll (11a) and said lower roll (11b).