The device has a short production line, and all components are reasonably configured. A multifunctional cooling control device is adopted to integrate high-pressure water descaling and intermediate billet cooling functions, which is simpler and more efficient. Layout of a 4R+(3−4)F rolling mill, four thermos-detectors and short-distance underground coilers are use. The method includes the steps: carrying out continuous casting to manufacture a slab, high-pressure water rotating descaling, rough rolling by a four-stand high reduction rough rolling unit, machining by a drum shear, cooling after high-pressure water descaling in the multifunctional cooling control device, finish rolling by a three-stand or four-stand finish rolling unit, air cooling, dividing coils by a high-speed flying shear, and coiling by underground coilers, wherein temperature monitoring is respectively carried out after rough rolling, before finish rolling, after finish rolling, and before coiling by the underground coiler.

In preset calculation, a plurality of cooling banks are set to be feedforward or feedback banks, and each of water injection amounts in these banks is calculated. In cooling history management, a recalculation position for re-executing the feedback calculation is set. In feedback calculation, a temperature correction value for compensating a delay due to a conveyance time period from a position of the feedback bank to a position of a delivery side pyrometer, and a response delay of the feedback bank is calculated, when a segment reaches the recalculation position. In the feedback calculation, each of water injection amounts in the feedback banks that is calculated in the preset calculation is changed for each of segments based on a delivery side temperature target value, a delivery side temperature actual value calculated for each of the segments, a delivery side temperature prediction value that is recalculated, and the temperature correction value.

A rolling controller executes speed and tension control, and roll gap and plate thickness control when rolling speed is less than a boundary value, while executing roll gap and plate tension control, and speed and plate thickness control when the rolling speed is equal to or greater than the boundary value. If the rolling speed rises across the boundary value, the rolling controller sets the rolling speed to zero such that a speed correction amount in the speed and tension control before the transboundary is not reflected to a calculation executed in the speed control amount of the rolling speed after the transboundary.

A process of cold rolling an aluminum product, e.g. a strip, which crosses at least one rolling stand, wherein a lubricant is applied to the strip close to said at least one rolling stand by means of a plurality of applying means, said lubricant comprising an emulsion of oil and water. A related rolling plant is also described.

In a method for the online determination of at least one rolling parameter when rolling a rolling material rolled along a rolling line in a rolling mill including at least two rolls on a roll stand, the rolling material is guided past or through at least one measuring device during the rolling, which interacts with a rolling material variable of the rolling material, the rolling material variable being changeable along the length of the rolling material, and outputs a measurement signal, wherein: (i) the measurement signal is transferred into the frequency space, and the rolling parameter is determined from the measurement signal transferred into the frequency space, and/or (ii) a frequency inherent in the change of the rolling material variable is determined from the measurement signal, and the rolling parameter is determined on the basis of the determined frequency.

In thickness control processing, transfer processing of an entry thickness He(N) is performed (step S1). In the transfer processing, data of the entry thickness He(N) is transferred from a position P11 to a position P12 at the same speed as the speed of a material to be rolled M. Subsequently, an amount of change in a thickness ΔH(N) is calculated (step S2). The amount of the change in the thickness ΔH(N) is calculated based on data of a delivery thickness Hd(N) and data of a transferred thickness Hc(N) transferred to the position P12 at a timing when the data of the delivery thickness Hd(N) is measured. Then, a target entry thickness He(N)_tgt is calculated (step S3). Subsequently, a manipulated amount of rolling speed VR(N−2) and VR(N−k) are calculated (step S4).

Device and method for descaling a workpiece that is in motion in relation to the device in a movement direction. The device includes a rotor head rotatable about a rotational axis and inclined diagonally at an angle (Y) with respect to an orthogonal on a surface of the workpiece. The device includes jet nozzles attached to the rotor head which dispense a pressurized liquid onto the workpiece at an angle of attack (α) inclined to the workpiece surface. The nozzles are fixedly attached on the rotor head such that during rotation of the rotor head about its axis of rotation, the spraying direction of the liquid dispensed from the nozzles with respect to a projection in a plane parallel to the surface of the workpiece, is aligned opposing to and at a spraying angle (β) of approximately between 170 and 190 degrees to the movement direction of the workpiece.

The invention relates to a method and a regulating device for regulating a rolling process, wherein a rolling material is rolled in a rolling gap between two working rollers of a rolling stand. According to the invention, a desired forward slip value (f.sub.s) for a forward slip (f) of the rolling material is specified, and an actual forward slip value (f.sub.M) of the forward slip (f) of the rolling material is ascertained. The forward slip (f) of the rolling material is regulated to the desired forward slip value (f.sub.s) in that a lubricant rate (u.sub.R) of a lubricant is applied to the rolling material and/or at least one working roller depending on the actual forward slip value (f.sub.M) and the desired forward slip value (f.sub.s).

A process inferentially determines hydrodynamic bearing flotation in a metal rolling operation for a metal roller bearing. The process receives from a mill stand processing the metal roll a rolling load of the metal roll, a gap between a pair of rollers pressing the metal roll, and a speed of the metal roll through the pair of rollers. The process further receives from the mill stand a gauge of the metal roll after the metal roll has passed through the pair of rollers. The process determines the hydrodynamic bearing flotation using the rolling load of the metal roll, the gap between a pair of rollers pressing the metal roll, the speed of the metal roll through the pair of rollers, and the gauge of the metal roll after the metal roll has passed through the pair of rollers. The process then adjusts the gap between the pair of rollers based on the determined hydrodynamic bearing flotation.

A method for the regulation of at least one of the parameters () of a hot rolling process of a semi-finished metal product in at least one rolling mill stand having at least two work rolls is provided. The regulation method includes calculating a forward slip ratio (FWS) with the following equation: $\mathrm{FWS}=\frac{\left|v_{\mathrm{exit}}-v_{\mathrm{stand}}\right|}{v_{\mathrm{stand}}}$
where v.sub.exit is the speed of the semi-finished product at the exit of the respective stand and v.sub.stand is the linear velocity of the work rolls; calculating an estimated coefficient of friction (.sub.real) as a function of a measured value of the screwdown force (F) of the work rolls in the stand and of the forward slip ratio (FWS); and regulating at least one of the parameters () based on the calculated estimated coefficient of friction (.sub.real).