The invention relates to a sheet metal having a deterministic surface structure, the surface structure being impressed into the sheet metal, the surface structure having at least one peak region and at least one valley region, the peak region and the valley region being joined by a flank region. The invention further relates to a method for producing a formed and coated sheet-metal component.

A metal sheet having a low friction coefficient and a low waviness. Multiple round or roughly-round small pits are distributed on the surface of the metal sheet. The diameter of a single pit ranges from 30 μm to 150 μm, and the overlap between adjacent pits is lower than 10%. On the surface of the metal sheet where the pits are located, the proportion of the area of pits per square millimeter of surface area is greater than 30%, and the difference between the quantities of pits in any unit square millimeter is less than 20%. By means of the proper design of surface microstructure, the friction coefficient and the waviness can be effectively reduced, thereby improving the forming and painting performance of the material.

A system for manufacturing an electrode for a secondary battery is disclosed herein. In an embodiment, the system for manufacturing the electrode for the secondary battery comprises a supply roller for supplying a collector having a long sheet shape; an electrode active material coating device for applying an electrode active material to a surface of the collector supplied by the supply roller to manufacture an unfinished electrode; a rolling roller for rolling a surface of the unfinished electrode and adjusting a thickness of the electrode active material to manufacture a finished electrode; and an electrode quality inspection device for inspecting quality of the electrode through a surface roughness value of the rolling roller, a surface roughness value of the surface of the electrode, and a rolling load value of the rolling roller.

A system for manufacturing an electrode for a secondary battery is disclosed herein. In an embodiment, the system for manufacturing the electrode for the secondary battery comprises a supply roller for supplying a collector having a long sheet shape; an electrode active material coating device for applying an electrode active material to a surface of the collector supplied by the supply roller to manufacture an unfinished electrode; a rolling roller for rolling a surface of the unfinished electrode and adjusting a thickness of the electrode active material to manufacture a finished electrode; and an electrode quality inspection device for inspecting quality of the electrode through a surface roughness value of the rolling roller, a surface roughness value of the surface of the electrode, and a rolling load value of the rolling roller.

A metal substrate provided with a surface texture wherein the Maximum Zero Normalised Auto Correlation (MZNAC) of the surface texture is in the range of 0.2-0.8, as well as a method to apply such surface textures on a metal substrate.

A flatness control system includes a work stand of a finishing line, a plurality of actuators, a flatness measuring device, and a controller. The work stand includes a pair of vertically aligned work rolls. A first work roll of the pair of work rolls includes a plurality of flatness control zones configured to apply a localized pressure to a corresponding region on a substrate. Each actuator corresponds with a one of the plurality of flatness control zones. The flatness measuring device is configured to measure an actual flatness profile of the substrate. The controller is configured to adjust the plurality of actuators such that the localized pressures modify the actual flatness profile to achieve the desired flatness profile at the exit of the stand. The thickness and a length of the substrate remain substantially constant when the substrate exits the work stand.

The invention relates to a steel sheet skin-pass rolled with a deterministic surface structure, and to a method for producing it.

Provided is a method for rolling a strip with a roll stand with at least two work rolls. A rolling gap with a pass line is defined between the work rolls. A control roll is arranged before the rolling gap of the work rolls in the rolling direction, the strip is guided into the rolling gap of the roll stand via the control roll at an entry angle relative to the pass line and the surface structure of the strip is controlled through the selection of the entry angle depending on the positioning of the control roll relative to the pass line. Also provided is an apparatus for rolling a strip with a roll stand having at least two work rolls. A rolling gap with a pass line is defined between the work rolls.

This application discloses cold rolled surfaces having a dulled gloss finish. The finish has a fairly uniform glossiness with a slightly matted appearance and with minimal directionality. The surfaces are prepared from work rolls having an Ra value of from 0.2 to 0.4 μm and an Rz value of less than 3.0 μm. Methods of preparing the surfaces are also described herein.

At least one foil surface of an aluminum foil is roughened; and in arithmetic mean roughnesses Ra, stipulated in JIS B 0601:2001, of the roughened surface(s), A, which is the arithmetic mean roughness Ra measured in a direction at a right angle to a rolling direction during foil rolling, and B, which is the arithmetic mean roughness Ra measured in a direction parallel to the rolling direction during foil rolling, satisfy the following relationships: 0.15 μm≦A≦2.0 μm; 0.15 μm≦B≦2.0 μm; and 0.5≦B/A≦1.5. Preferably 50-1000 μg/m.sup.2 of oil is adhered to the roughened foil surface. The oil is preferably rolling oil.