Abstract: A method for producing a sheet metal product (1) from a sheet metal preliminary product (2) is proposed, wherein at least one surface (7) of the sheet metal preliminary product (2) is coated with a coating, wherein the sheet metal preliminary product (2) is rolled, wherein depressions (6) are rolled into the surface (7) during the rolling operation, wherein after the coating and rolling operations lubricant (8.1) is introduced into the depressions (6), wherein after the introduction of lubricant (8.1) the sheet metal preliminary product (2) is mechanically formed by a forming tool (5), characterized in that the surface (7) is coated in such a way that, in the forming tool (5) during the forming process, in particular under relative movement between sheet metal surface and tool surface, the coating is elastically deformable under loads of 0.5 MPa to 20 MPa and plastically deformable under loads of above 20 MPa.

Abstract: The invention relates to sheet metal packaging products, in particular tinplate or electrolytically chrome-plated sheet steel (ECCS), consisting of a sheet steel substrate (S) with a thickness in the region of 0.1 mm to 0.6 mm and a coating (B), in particular made of tin and/or chromium or chromium and chromium oxide, that is electrolytically deposited on at least one side of the sheet metal substrate. In addition, at least one surface of the sheet metal packaging product provided with the coating (B) has a surface profile with periodically repeating structure elements in at least one direction, wherein an autocorrelation function resulting from the surface profile has a plurality of side lobes with a height of at least 20%, preferably at least 30% of the height of the main lobe. These sheet metal packaging products have improved and novel surface properties.

Abstract: An apparatus for structuring a roller surface is proposed, wherein the apparatus has a laser source and an optical system, wherein the laser source is designed for generating laser pulses, wherein the optical system has at least one beam shaper, at least one beam splitter, and a focusing unit, wherein the combination of beam shaper and beam splitter is arranged between the laser source and the focusing unit.

Abstract: A process for the industrial production of wear-resistant steel pipes having an optimized life. The process includes providing a wear-resistant, hardenable steel sheet in an unhardened or tempered state, shaping the steel sheet into a tubular preform in which two longitudinal edges of the steel sheet are positioned opposite one another with a welding gap extending between the two edges, welding the longitudinal edges by forming a welded seam which closes the welding gap, thereby forming a steel pipe, and heat treating the steel pipe. The heat treatment of the steel pipe includes heating the steel pipe at an average heating rate of 5-400 K/s to a hold temperature which is ? the Ac3 temperature of the steel and ?1100° C., holding the steel pipe at the hold temperature for 1-120 s, and cooling the steel pipe at an average cooling rate of 10-600 K/s to room temperature.

Abstract: A flat product made of a metal material has been provided with deterministic surface texture which has a plurality of depressions which have a depth in the range of from 2 to 14 ?m, wherein the depressions are designed to be I-shaped, H-shaped, cross-shaped, C-shaped or X-shaped, and wherein the surface texture has a peak count RPc in the range of from 45 to 180 1/cm, an arithmetic mean roughness Ra in the range of from 0.3 to 3.6 ?m, and an arithmetic mean waviness Wsa in the range of from 0.05 to 0.65 ?m.

Abstract: “A method for thermally treating a flat steel product, a thermally treated flat steel product and use thereof. The method includes providing a flat steel product with a structure with a first hardness. The flat product is heated at least in sections to an austenitizing temperature. The heated flat product is cooled at least in sections so that a structure with a second hardness is formed within the flat product at least in sections, the second hardness having a higher level of hardness in comparison to the structure with the first hardness. The heating and the cooling down of the flat product are coordinated with each other such that the structure with the second hardness is formed across the thickness of the flat product and at least in one of said sections, the structure with the first hardness remains constant across the thickness of the flat product.

Abstract: A method and a device for inductive radiofrequency welding of metal products, include heating by inducing radiofrequency currents with use of at least one induction conductor. The metal products and a welding zone are moved relative to one another, so that edge regions of the metal products to be welded are brought in contact in the welding zone and are welded together to form a weld seam. Metal products with different material thicknesses and/or material properties can be welded together because an induction conductor which heats the edge regions of the metal products is used which includes at least two mutually separable induction conductor components that are assigned to the respective metal product and are adapted thereto, and the edge regions to be welded are heated in a manner that is adjusted separately for the respective metal product.

Abstract: The invention relates to a method for the decoating at least in part of blanks made of metal which are coated on one or both sides in regions, which have a main extension direction, wherein the regions to be decoated can extend in both a straight or curved manner in the main extension direction. The invention further relates to a device for the decoating at least in part of a coated blank in order to carry out the method according to the invention. A method is provided in which the blank is placed on a blank support of a press and during the closing movement of the press at least one scraping knife preferably completely removes the coating of the blank by scraping substantially perpendicular to the main extension direction of the region of the blank to be decoated.

Abstract: The invention relates to a method for machining a workpiece by means of a laser beam, in particular a part of a motor vehicle, wherein a laser beam is applied to the workpiece by means of a scanner, material of the workpiece is ablated, the radiation produced by the plasma during the process in the work area and/or reflected laser radiation is detected, and a signal is generated depending on the detected plasma and/or laser radiation. In addition the invention also relates to an apparatus for the laser beam machining of a workpiece, in particular for carrying out a method according to the invention. A greater process reliability can be ensured in laser beam machining in that the position of the laser beam in relation to the workpiece and/or the ablation depth is regulated and/or controlled depending on the signal.

Abstract: The invention relates to a method and a device for guiding bands to be joined to one another along their longitudinal edges, comprising guide elements which form tracks for guiding the bands that are configured such that the bands approach one another in the transport direction and the longitudinal edges thereof rest on one another at a non-overlapping contact point. At least one of the tracks may be configured to undulate with a wavelength of ¼???2, such that transverse displacement of the band guided thereon occurs. The axes of rotation and/or longitudinal central axes of the guide elements may also be inclined towards one another at different angles of inclination in relation to a horizontal plane of reference, such that the band guided on said track is rotated about its longitudinal axis in the transport direction.

Abstract: A flat product made of a metal material has been provided with deterministic surface texture which has a plurality of depressions which have a depth in the range of from 2 to 14 ?m, wherein the depressions are designed to be I-shaped, H-shaped, cross-shaped, C-shaped or X-shaped, and wherein the surface texture has a peak count RPc in the range of from 45 to 180 l/cm, an arithmetic mean roughness Ra in the range of from 0.3 to 3.6 ?m, and an arithmetic mean waviness Wsa in the range of from 0.05 to 0.65 ?m.

Abstract: A bipolar plate which can be produced particularly economically for a fuel cell, with which a high degree of efficiency is guaranteed over a long service life. The bipolar plate has a core layer consisting of a steel material, the surfaces of said core layer, which are associated with the respective electrolyte carriers of the fuel cell, having a corrosion protection layer, protecting the core layer against corrosion. The corrosion protection layers consist of a metal material and extend on both sides over the whole surface of the core layer. At the same time the corrosion protection layers are in turn coated over the whole surface with an electrically conductive functional coating, which is essentially entirely impermeable for the metal ions emerging from the core layer and/or the corrosion protection layers. The invention likewise relates to at least one fuel cell comprising a bipolar plate according to the invention.

Abstract: The invention relates to a method for the decoating at least in part of blanks made of metal which are coated on one or both sides in regions, which have a main extension direction, wherein the regions to be decoated can extend in both a straight or curved manner in the main extension direction. The invention further relates to a device for the decoating at least in part of a coated blank in order to carry out the method according to the invention. A method is provided in which the blank is placed on a blank support of a press and during the closing movement of the press at least one scraping knife preferably completely removes the coating of the blank by scraping substantially perpendicular to the main extension direction of the region of the blank to be decoated.

Abstract: The invention relates to a method for machining a workpiece by means of a laser beam, in particular a part of a motor vehicle, wherein a laser beam is applied to the workpiece by means of a scanner, material of the workpiece is ablated, the radiation produced by the plasma during the process in the work area and/or reflected laser radiation is detected, and a signal is generated depending on the detected plasma and/or laser radiation. In addition the invention also relates to an apparatus for the laser beam machining of a workpiece, in particular for carrying out a method according to the invention. A greater process reliability can be ensured in laser beam machining in that the position of the laser beam in relation to the workpiece and/or the ablation depth is regulated and/or controlled depending on the signal.

Abstract: The invention relates to a method and a device for guiding bands to be joined to one another along their longitudinal edges, comprising guide elements which form tracks for guiding the bands that are configured such that the bands approach one another in the transport direction and the longitudinal edges thereof rest on one another at a non-overlapping contact point. At least one of the tracks may be configured to undulate with a wavelength of ¼???2, such that transverse displacement of the band guided thereon occurs. The axes of rotation and/or longitudinal central axes of the guide elements may also be inclined towards one another at different angles of inclination in relation to a horizontal plane of reference, such that the band guided on said track is rotated about its longitudinal axis in the transport direction.

Abstract: A device and a method for guiding bands to be joined to one another along their longitudinal edges, in which bands are guided via deflection rollers to a joining position. The device according to the invention provides that the deflection roller located closer to the joining position is configured as a conical roller, the deflection roller arranged upstream of this conical roller in the running direction of the band being also configured as a conical roller or as a deflection roller having a cylindrical lateral surface, and the conical roller last mentioned tapering in the direction of the other longitudinal edge of the band, or the rotational axis of the deflection roller having a cylindrical lateral surface spatially approaching the rotational axis of the conical roller arranged downstream in the running direction of the band on the edge side of the band opposing the longitudinal edge to be joined.

Abstract: A laser beam welding head for the welding of metal parts and method of use include at least one beam path for a welding beam and means for the optical acquisition of the position of the welding seam at a first measuring position, wherein the means for the optical acquisition of the position of the welding seam allow arrangement of the first measuring position in the welding direction running ahead of the welding position of the welding beam, and, at least as a function of a lateral deviation of the welding seam from a reference position, generate a correction signal for the correction of the welding position of the welding beam, as well as a corresponding use of the laser beam welding head.

Abstract: A method and a device for inductive radiofrequency welding of metal products, include heating by inducing radiofrequency currents with use of at least one induction conductor. The metal products and a welding zone are moved relative to one another, so that edge regions of the metal products to be welded are brought in contact in the welding zone and are welded together to form a weld seam. Metal products with different material thicknesses and/or material properties can be welded together because an induction conductor which heats the edge regions of the metal products is used which includes at least two mutually separable induction conductor components that are assigned to the respective metal product and are adapted thereto, and the edge regions to be welded are heated in a manner that is adjusted separately for the respective metal product.

Abstract: A bipolar plate which can be produced particularly economically for a fuel cell, with which a high degree of efficiency is guaranteed over a long service life. The bipolar plate has a core layer consisting of a steel material, the surfaces of said core layer, which are associated with the respective electrolyte carriers of the fuel cell, having a corrosion protection layer, protecting the core layer against corrosion. The corrosion protection layers consist of a metal material and extend on both sides over the whole surface of the core layer. At the same time the corrosion protection layers are in turn coated over the whole surface with an electrically conductive functional coating, which is essentially entirely impermeable for the metal ions emerging from the core layer and/or the corrosion protection layers. The invention likewise relates to at least one fuel cell comprising a bipolar plate according to the invention.

Abstract: A laser beam welding head for the welding of metal parts and method of use include at least one beam path for a welding beam and means for the optical acquisition of the position of the welding seam at a first measuring position, wherein the means for the optical acquisition of the position of the welding seam allow arrangement of the first measuring position in the welding direction running ahead of the welding position of the welding beam, and, at least as a function of a lateral deviation of the welding seam from a reference position, generate a correction signal for the correction of the welding position of the welding beam, as well as a corresponding use of the laser beam welding head.