Centre De Recherches Metallurgiques Asbl

Roger Franssen

Hugo Uijtdebroeks

Marc Schyns

Hogo Uijtdebroeks

In a process for the inspection of the surface of a cylindrical body and more especially that of a mill roll, at least one zone of the surface is observed by means of an inspection device having an optical axis oriented towards this zone of the surface with a view to determining the state of the surface. To this end, at least one image of the zone supplied by the inspection device is captured, at least one of the images captured is analysed, the analysis of the image or images captured is compared with the analysis of a reference image, the differences between the analysis of the image or images captured and the analysis of the reference image are detected, and at least the orientation of the optical axis is adjusted so as at least to reduce and preferably to eliminate the differences found. The device can include mechanical and/or optical means of adjusting the orientation of the optical axis.

Method for inspecting the surface of a roll cylinder and device therefor

The invention concerns an apparatus for inspecting a surface, in particular the surface of a mill roll, comprising a housing wherein are arranged means for transmitting and receiving a light beam, and an optical coupling device arranged on the outer surface of a front wall of the housing. The optical coupling device comprises: (a) a component (), called fluid dispenser, (b) a hollow cylindrical nozzle (), and (c) a mobile tubular component (), successively traversed by the light beam. The mobile tubular component () is arranged partly inside the cylindrical nozzle (), so as to be able to slide inside said cylindrical nozzle, and partly exits therefrom in the extension thereof, towards the surface to be inspected (). Different cross-sections (shoulders) are provided in the cylindrical nozzle () and in the mobile tubular component (), in particular for limiting said sliding movement. The mobile tubular component () is positioned in the cylindrical nozzle by the sole effect of the coupling fluid pressure on its end surfaces. The device can further comprise means () for preventing the rotation of the tubular component () about its longitudinal axis.

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Montzen-Plombieres, Belgium

Roger Franssen