Sms Schloemann-siemag Aktiengesellschaft

Karl-Ernst Boucke

Wilfried Bald

Hans Rommen

Friedrich Wilhelm Hollmann

Manfred Fritz

An apparatus is provided for removing scale from a hot rolled steel strip by rolls acting by grinding and/or milling so that these rolls are uniformly effective in all regions of the steel strip and an appropriate uniform removal of the scale layer occurs. This is attained when driven grinding rolls adjustable toward the surfaces of the steel strip are provided of which at least two opposing rolls are axially slidable in opposite directions and have inversely oriented S-shape contours. These contours complement each other completely flawlessly in one definite position of the grinding rolls. In one such position the rolls provide a uniform engagement on both sides of a steel strip with a nearly rectangular profile. In fact the rolls by appropriate axial sliding and application of bending forces if necessary may be adjusted to fit the actual profile of the steel strip so that a uniform engagement on the scale layer is guaranteed and a locally excessive grinding and/or milling in the central region of the steel strip is avoided.

Apparatus for removal of scale from hot-rolled steel strip

The rolling mill for mechanical descaling of hot rolled steel is constructed according to the slidable roll process with reducing rolls so that a unform operation with different and/or changing shape steel strips can obtained. This is attained when the rolling mill has at least two rolls slidable in opposite directions whose body surfaces are constructed with S-shape contours positioned inversely to each other so that these contours compliment each other flawlessly in one certain axial relative position. When sliding the rolls in opposite directions in one case the contour is decreased in the center region of the steel strip and when slid in the opposite directions in the other case the contour is increased in the center region. Thus the rolls can be adjusted to fit a gently convex steel strip profile by axially sliding the rolls in opposite directions as also rolled strips with a thickness centrally reduced in comparison to that of the edge regions can by appropriate sliding of the rolls opposite each other.

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Grevenbroich, Germany

Karl-Ernst Boucke