Vai Clecim - Le Polyedre

Siemens Vai Metals Technologies Sas

Vai Clecim

Thierry Malard

Jean-Paul Faure

Marc Valence

Christian Viel

Andr&eacute; Ravenet

The invention relates to a method and a device for stabilizing high speed running along a longitudinal direction, of a band () applied on a rotary surface () and along which a portion of the surrounding air forms a boundary layer () trapped with the band (). According to the invention, a deflecting member () is placed in the dihedron (G) between the band () and the rotary surface (). Said deflecting member () has a face () directed toward the band which is tilted with respect thereto and is fitted with at least one orifice () emerging into an inner space () provided inside said deflecting member () and connected to an outer zone. Thus, said tilted face () forms, with the inner face () of the band (), a convergent (C) wherein the pressure increases with respect to the pressure in the inner space () and the differential pressure determines the exhaust of a certain air flow rate through the orifice () and the separation of the remaining portion of the air mass trapped in the boundary layer ().

Method and device for stabilizing high-speed unwinding of a strip product

Method of and a device for flatness detection

Process for detecting flatness defects

The invention relates to a method for thermal control of the profile of a roll in a mill by spraying, over a cooled zone ( ) of the roll ( ), a series of jets of fluid (J), each forming an oblong impact surface (S). According to the invention, the distance (a) between the middle axes of the impact surfaces (S) is caused to vary in relation to the position of the said impact surfaces over the length of the cooled zone ( ) so that the said zone comprises a central zone ( ) with a substantially constant pitch and whereas two transition zones ( ) extend on either side of the central zone at least up to two edges ( ) of the band (M) and in which the spacing between the middle axes of the impact surfaces (S) is reduced with respect to the constant pitch (a) of the central zone ( ).

Method and a device for thermal control of the profile of a roll in a mill

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L'Isle Adam, France

Thierry Malard