A system for processing a rectangular material from a coil is provided. The system may include an unwinding unit configured to unwind a rectangular material from a coil wound on a bobbin, a flattening device configured to flatten the unwound rectangular material, a shaping device configured to transform the flattened rectangular material into a shaped hairpin configuration; a reader configured to recognize, based on scanning an identification code of the bobbin mounted on the unwinding unit, batch information, and a controller configured to store, based on the batch information, a reference graph of a pressing amount for each batch of the bobbin set through a test; calculate, based on the stored reference graph and a change in physical properties of a rectangular material, a pressing amount for a rectangular material; and selectively control, based on the calculated pressing amount, a pressing amount of an individual flattening roller of flattening rollers.

A system for processing a rectangular material from a coil is provided. The system may include an unwinding unit configured to unwind a rectangular material from a coil wound on a bobbin, a flattening device configured to flatten the unwound rectangular material, a shaping device configured to transform the flattened rectangular material into a shaped hairpin configuration; a reader configured to recognize, based on scanning an identification code of the bobbin mounted on the unwinding unit, batch information, and a controller configured to store, based on the batch information, a reference graph of a pressing amount for each batch of the bobbin set through a test; calculate, based on the stored reference graph and a change in physical properties of a rectangular material, a pressing amount for a rectangular material; and selectively control, based on the calculated pressing amount, a pressing amount of an individual flattening roller of flattening rollers.

A cold rolling mill rolling condition setting method using a prediction model being generated with an explanatory variable being first multi-dimensional data obtained by transforming past rolling performance data including pre-cold rolling data of a roll material on an entry side of the cold rolling mill into multi-dimensional data, and an objective variable being post-cold rolling data of the roll material on a delivery side of the cold rolling mill, the method includes: estimating a post-rolling shape of a roll target material by inputting, to the prediction model, second multi-dimensional data generated from information including the pre-cold rolling data of the roll target material on the entry side of the cold rolling mill and a target rolling condition of the cold rolling mill; and changing the target rolling condition of the cold rolling mill such that the estimated post-rolling shape of the roll target material satisfies a predetermined condition.

A provisional elongation strain difference distribution (x) of a metal strip during rolling is found under conditions in which out-of-plane deformation of the metal strip is restrained. A critical buckling strain difference distribution .sub.cr(x) is found based on the provisional elongation strain difference distribution (x), a strip thickness and strip width of the metal strip, and tension acting on the metal strip at exit from a rolling mill. When the provisional elongation strain difference distribution (x) exceeds the critical buckling strain difference distribution .sub.cr(x), the difference between the provisional elongation strain difference distribution (x) and the critical buckling strain difference distribution .sub.cr(x) is found, and added to the provisional elongation strain difference distribution (x) to find a true elongation strain difference distribution (x). Rolling conditions are set based on the true elongation strain difference distribution (x), and the metal strip is rolled, thereby controlling the metal strip's profile.

A provisional elongation strain difference distribution (x) of a metal strip during rolling is found under conditions in which out-of-plane deformation of the metal strip is restrained. A critical buckling strain difference distribution .sub.cr(x) is found based on the provisional elongation strain difference distribution (x), a strip thickness and strip width of the metal strip, and tension acting on the metal strip at exit from a rolling mill. When the provisional elongation strain difference distribution (x) exceeds the critical buckling strain difference distribution .sub.cr(x), the difference between the provisional elongation strain difference distribution (x) and the critical buckling strain difference distribution .sub.cr(x) is found, and added to the provisional elongation strain difference distribution (x) to find a true elongation strain difference distribution (x). Rolling conditions are set based on the true elongation strain difference distribution (x), and the metal strip is rolled, thereby controlling the metal strip's profile.

A control device that receives actual variables (I) of a flat rolled product before rolling and target variables (Z) of the rolled product after rolling in a rolling mill. The target variables (Z) include at least one profile value (C) of the rolled product, which relates to a predetermined spacing (a) from the edges of the rolled product. The control device determines an ideal contour shape (ci) on the basis of the target variables (Z). On the basis of the actual variables (I) and the ideal contour shape (ci), the device uses a model of the rolling mill to determine target values (COM) for manipulated variables for the roll stands of the rolling mill. The device transfers the target values (COM) to the roll stands, such that the rolled product is rolled in the rolling mill in consideration of the target values (COM).

A control device that receives actual variables (I) of a flat rolled product before rolling and target variables (Z) of the rolled product after rolling in a rolling mill. The target variables (Z) include at least one profile value (C) of the rolled product, which relates to a predetermined spacing (a) from the edges of the rolled product. The control device determines an ideal contour shape (ci) on the basis of the target variables (Z). On the basis of the actual variables (I) and the ideal contour shape (ci), the device uses a model of the rolling mill to determine target values (COM) for manipulated variables for the roll stands of the rolling mill. The device transfers the target values (COM) to the roll stands, such that the rolled product is rolled in the rolling mill in consideration of the target values (COM).

A sensor roller for determining planarity errors and/or for determining the tension of a strip tangentially engaging the roller has a roller body rotatable about an axis, having an outer surface, and formed with a plurality of radially outwardly open recesses axially spaced on the surface. Rigid sensor bodies each in a respective one of the recess each have an outer surface generally flush with the outer surface of the roller body. Each sensor body forms with a side surface of the respective recess a peripheral circumferentially fully extending gap. Respective force-measuring sensors in the recesses are each braced between a respective one of the sensor bodies and the roller body radially inward of the respective sensor body. An annular weld seam of welding compound is formed in each of the gaps

A flatness measuring apparatus for measuring the flatness of a metallic strip, including a measuring roller which has a roller axis and which makes contact with the strip for the measuring the flatness. The measuring roller is connected to a cooling system, using which the measuring roller can be cooled. To ensure that a high degree of measuring accuracy can be maintained even at high temperatures, the cooling system has a nozzle bar that extends parallel to the roller axis. At least one spray nozzle is arranged on the nozzle bar, using which cooling medium can be sprayed on the surface of the measuring roller in a spraying direction. The spraying direction meets a surface section of the measuring roller, and the angle between the spraying direction and the tangent on the measuring roller at the location of the surface section is less than 30?.

A flatness measuring apparatus for measuring the flatness of a metallic strip, including a measuring roller which has a roller axis and which makes contact with the strip for the measuring the flatness. The measuring roller is connected to a cooling system, using which the measuring roller can be cooled. To ensure that a high degree of measuring accuracy can be maintained even at high temperatures, the cooling system has a nozzle bar that extends parallel to the roller axis. At least one spray nozzle is arranged on the nozzle bar, using which cooling medium can be sprayed on the surface of the measuring roller in a spraying direction. The spraying direction meets a surface section of the measuring roller, and the angle between the spraying direction and the tangent on the measuring roller at the location of the surface section is less than 30?.