Abstract: The present invention relates to a method and an apparatus for changing the effective contour of a running surface (8) of a working roller (3, 4) during the hot rolling of rolling stock in a roll stand (2) to form a rolled strip (1). The intention is to be able to change the contour of the running surface (8) during the hot rolling by means of the invention. This object is achieved according to the invention by the axial displacement of the working rollers (3, 4) in opposite directions by a displacement distance s, wherein s is greater or less than ?r/tan(?) and ?r indicates the wear of the running surface (8) in the radial direction (R) and ? indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).

Abstract: The present invention relates to a method and an apparatus for changing the effective contour of a running surface (8) of a working roller (3, 4) during the hot rolling of rolling stock in a roll stand (2) to form a rolled strip (1). The intention is to be able to change the contour of the running surface (8) during the hot rolling by means of the invention. This object is achieved according to the invention by the axial displacement of the working rollers (3, 4) in opposite directions by a displacement distance s, wherein s is greater or less than ? ? ? r tan ? ? ( ? ) and ?r indicates the wear of the running surface (8) in the radial direction (R) and ? indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).

Abstract: The invention relates to a surveillance system for an infrastructure and/or for a vehicle, comprising at least two sensor modules configured to collect respective sensor data from a respective associated sensor; an analysis module configured to access the sensor data; wherein the sensor modules are configured to provide the sensor data with a time stamp; and the analysis module is configured to detect a given event based on sensor data of at least one first sensor module and to associate sensor data of at least one other second sensor module with the event based on the time stamps of the sensor data to provide an enhanced surveillance and/or maintenance system, in particular a system suitable for large and/or complex infrastructures, vehicles, and combinations thereof.

Abstract: Methods and apparatus for locally changing a roll gap in the region of the strip edges (10) of a rolled strip (1) in a rolling stand (2). The roll gap can be changed locally in the region of the strip edges (10) of the strip (1) during the hot rolling. Axial displacement of the working rollers (3, 4) in opposite directions is by a displacement distance s, where s is greater than or less than ?r/tan(?) and ?r indicates the wear of the running surface (8) in the radial direction (R) and ? indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).

Abstract: The invention relates to a surveillance system for an infrastructure and/or for a vehicle, including at least two sensor modules configured to collect respective sensor data from respectively associated sensors; at least one access module being configured to access the sensor data; and a clock module being configured to provide a common time signal at least to two of the sensor modules; wherein the sensor modules are configured to provide the sensor data with a time stamp, wherein the time stamp is based on the common time signal; and the access module being configured to forward the accessed sensor data by taking into account the time stamp so as to provide an enhanced surveillance and/or maintenance system which is suitable for large and/or complex infrastructures, vehicles, and combinations thereof.

Abstract: The present invention relates to a method and an apparatus for changing the effective contour of a running surface (8) of a working roller (3, 4) during the hot rolling of rolling stock in a roll stand (2) to form a rolled strip (1). The intention is to be able to change the contour of the running surface (8) during the hot rolling by means of the invention. This object is achieved according to the invention by the axial displacement of the working rollers (3, 4) in opposite directions by a displacement distance s, wherein s is greater or less than ? ? ? r tan ? ? ( ? ) and ?r indicates the wear of the running surface (8) in the radial direction (R) and ? indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).

Abstract: Methods and apparatus for locally changing a roll gap in the region of the strip edges (10) of a rolled strip (1) in a rolling stand (2). The roll gap can be changed locally in the region of the strip edges (10) of the strip (1) during the hot rolling. Axial displacement of the working rollers (3, 4) in opposite directions is by a displacement distance s, where s is greater than or less than ?r/tan(?) and ?r indicates the wear of the running surface (8) in the radial direction (R) and ? indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).

Abstract: A computer determines a thickness and/or a temperature of a metal strip. The computer determines the temperatures occurring along a respective rotation part of the respective surface elements of the rotary elements and a rotary element shape which forms in the region of a draw-off point on the respective surface element, by a respective rotary element model and using an exchanged enthalpy quantity, the respective contact time with a metal and a respective cycle time exchanged per time unit of a respective rotary element of a casting device with the environment thereof. The temperature of the metal situated in the die region, and the heat flow from the metal to the respective surface element, are determined by a respective metallurgical solidification model and using a metal temperature, the temperatures of the surface elements, the rotary element shape and characteristic metal values.

Abstract: A current temperature is ascertained for sections of a strip ahead of a first mill stand. The temperatures of the strip sections are predicted with a prediction horizon corresponding to multiple strip sections, including when each strip section is milled in the first mill stand for which time a nip profile formed by the working rolls is predicted. A control parameter for milling a specific strip section in the first mill stand is ascertained for controlling a control device of the first mill stand. A manipulated variable curve for the control device, influencing the nip profile of a nip formed by working rolls of the first mill stand, is set for the prediction horizon and optimized for the predicted nip profile and a desired profile. The current value of the optimized manipulated variable curve corresponds to the control parameter which is fed to the control device as the manipulated variable.

Abstract: Molten metal poured into a mold region, delimited by a first casting roll that rotates about a first rotational axis, produces a metal strand upon solidification which is conveyed out of the mold region. A liquid coolant is applied to the surface of the first casting roll by a first cooling device via first coolant lines and first coolant applying devices. The coolant is inert with respect to the molten metal and has a standard boiling point below 20° C., e.g., ?20° C., at normal air pressure, and an operating temperature at or below an operating boiling point at an operating pressure at which the coolant is supplied. A control device automatically controls the first cooling device by ascertaining a control state of the first cooling device using a target property for an actual property of the first casting roll or the metal strand detected by at least one sensor.

Abstract: A computer determines a thickness and/or a temperature of a metal strip. The computer determines the temperatures occurring along a respective rotation part of the respective surface elements of the rotary elements and a rotary element shape which forms in the region of a draw-off point on the respective surface element, by a respective rotary element model and using an exchanged enthalpy quantity, the respective contact time with a metal and a respective cycle time exchanged per time unit of a respective rotary element of a casting device with the environment thereof. The temperature of the metal situated in the die region, and the heat flow from the metal to the respective surface element, are determined by a respective metallurgical solidification model and using a metal temperature, the temperatures of the surface elements, the rotary element shape and characteristic metal values.

Abstract: A cleaning device and method remove a lubricant from the rolls of a roll stand. To achieve economical and efficient cleaning of the rolls, the cleaning device includes at least one ultrasonic generator for generating ultrasonic waves, the ultrasonic waves being routed to the surface of the rolls by cleaning water; and a supply line for the cleaning water. The supply line is a branch of a cooling water circuit for the roll stand, enabling the water consumption for the roll stand to be kept constant during the cleaning phase. The water is merely redistributed in that a portion of the cooling water is supplied to the cleaning device. This creates the advantage of the roll temperature rising slightly, with the result that the cleaning performance is supported by the higher roll temperature at which the lubricant is better released from the surface of the roll.

Abstract: Molten metal poured into a mold region, delimited by a first casting roll that rotates about a first rotational axis, produces a metal strand upon solidification which is conveyed out of the mold region. A liquid coolant is applied to the surface of the first casting roll by a first cooling device via first coolant lines and first coolant applying devices. The coolant is inert with respect to the molten metal and has a standard boiling point below 20° C., e.g., ?20° C., at normal air pressure, and an operating temperature at or below an operating boiling point at an operating pressure at which the coolant is supplied. A control device automatically controls the first cooling device by ascertaining a control state of the first cooling device using a target property for an actual property of the first casting roll or the metal strand detected by at least one sensor.

Abstract: Based on an actual temperature upstream of a roll stand, a predicted temperature is estimated for when strip sections of the strip will roll through the roll stand. The predicted temperature is used to predict material moduli, which is used to control a regulating device that influences a roll gap for the roll stand and to parameterize a roll gap control system. A roll gap profile is predicted based on the predicted temperatures, and is compared with a nominal roll gap profile. A regulating variable that influences a profile of a roll gap is set. The regulating variable is then corrected based on the comparison with the nominal roll gap profile. The predictions are made using a prediction horizon corresponding to a plurality of consecutive sections of the strip. Control is performed for both an operator side and a drive side of the strip.

Abstract: A current temperature is ascertained for sections of a strip ahead of a first mill stand. The temperatures of the strip sections are predicted with a prediction horizon corresponding to multiple strip sections, including when each strip section is milled in the first mill stand for which time a nip profile formed by the working rolls is predicted. A control parameter for milling a specific strip section in the first mill stand is ascertained for controlling a control device of the first mill stand. A manipulated variable curve for the control device, influencing the nip profile of a nip formed by working rolls of the first mill stand, is set for the prediction horizon and optimized for the predicted nip profile and a desired profile. The current value of the optimized manipulated variable curve corresponds to the control parameter which is fed to the control device as the manipulated variable.