Patent ID: 6671958
Filing Date: 2004-01-06
Classification: B65H,D21F,D21G,F16C,Y10T

Abstract:
A method for producing a roll for a paper or board machine, in which method a tubular roll blank is made by bending out of a planar sheet or by means of centrifugal casting,wherein wall thickness of the roll blank is measured during rotation of the roll blank in order to determine the shape of the outer surface, differences in stiffness of the tubular roll blank in planes passing through an axis defined by the tubular roll blank are calculated, and a shape required for balancing stiffness is determined and the shape is corrected with respect to stiffness to minimize differences in stiffness without turning the tubular roll blank, wherein the roll blank is then coated with a material that has a modulus of elasticity and a density lower than those of steel, and that the coated roll blank is turned on a lathe to a desired shape, by removing only the material that has an elasticity and a density lower than those of steel and the coated roll blank is turned on a lathe to a desired surface quality, whereby errors in shape of the tubular roll blank are passed to the coating as thickness variation.