Abstract: A method for producing a supporting element for a transportation device or vehicle, having steps of providing a flat base chord made of a first material having a first surface and a second surface, applying at least one layer of at least one second material to the first surface using a friction-based application or welding method, and machining the at least one layer of the second material to produce a desired profile cross section of the supporting element, wherein the first material and the second material are different metallic materials.

Abstract: The invention relates to a planar structure for joining, in particular for the material-uniting joining, of at least two components. According to the invention, the planar structure is flexible and formed by at least one reaction strand. The reaction strand comprises a preferably cylindrical core, which is provided, at least in some areas, with a coating, which is constructed with a plurality of coaxially applied layers with a small thickness. To produce the layers, two different materials are used, the layers being constructed alternately with one of the two materials. Because of the high degree of flexibility of the reactive planar structure and its arbitrary area extent, components with a complex geometry in the region of the joint faces as well as large-format components can be joined in a material-uniting manner without problems.

Abstract: An electrolyte (EL) for the electrolytic polishing of a metallic substrate includes at least one acid compound (A), at least one fluoride compound (F), and at least one complexing agent (CA). Furthermore, a process for the electrolytic polishing of a metallic substrate wherein the electrolyte (EL) including at least one acid compound (A), at least one fluoride compound (F), and at least one complexing agent (CA) is applied.

Abstract: A profile plate portion is disclosed for use as an outer wall of a flow body including a first profile plate panel that is fluid permeable, a second profile plate panel extending along the first profile plate panel, and a reinforcing device for supporting the first profile plate panel and the second profile plate panel on one another. Fluid can flow through the reinforcing device, and/or fluid of the flow present at the first profile plate panel, which flows through the first profile plate panel, can flow through the reinforcing device in the local profile plate thickness direction from the first profile plate panel to the second profile plate panel and in some regions can flow through to an inside that is situated opposite the flow side. A method is disclosed for manufacturing a profile plate portion and a flow body component with a suction-extraction device for fluid.

Abstract: The disclosure provides methods for the detection of a possible joint defect, in particular a root fusion defect, in a friction stir weld seam, wherein two members are joined together and the methods include generating of a tensile stress in the region of the friction stir weld seam in the elastic range, and testing in at least some regions of a lower face of the friction stir weld seam, in order to detect any joint defect.

Abstract: A method for a thermal joining of two thermoplastic components includes arranging at least one reactive sheet entity in a mating zone between the two thermoplastic components. A multiply perforated metallic sheet entity configured as a bonding agent is disposed on each side of the at least one reactive sheet entity, at least in some regions of the mating zone. The at least one reactive sheet entity is activated so as thermally join the two thermoplastic components in the regions of the mating zone.

Abstract: A device for reducing the aerodynamic drag of a leading surface of an aircraft includes at least one air permeable structure disposed in an area of the leading surface and a suction device configured to interact with the at least one air permeable structure.

Abstract: A method and apparatus for manufacturing a three-dimensional object by additive layer manufacturing. The method includes providing layers of material in powder form on a support inside a chamber, and irradiating each layer with a beam before providing the subsequent layer. A gas atmosphere is maintained inside the chamber during the irradiation steps. The pressure and/or the composition of the gas atmosphere is controlled where at least two different gas atmospheres having different predetermined pressures and/or compositions are inside the chamber during irradiation of the layers, the beam spot size on the layers is controlled such that at least two different beam spot sizes are utilized during irradiation, and/or the temperature of the gas atmosphere inside the chamber and/or of the layer being irradiated is controlled such that at least two different temperatures of the gas atmosphere and/or of the layer being irradiated are present during irradiation of the layers.

Abstract: The disclosure provides methods for the detection of a possible joint defect, in particular a root fusion defect, in a friction stir weld seam, wherein two members are joined together and the methods include generating of a tensile stress in the region of the friction stir weld seam in the elastic range, and testing in at least some regions of a lower face of the friction stir weld seam, in order to detect any joint defect.

Abstract: The invention concerns a surface entity for the reduction of the air resistance of an aviation vehicle, in particular an aircraft. In accordance with the invention the surface entity is formed with at least one metal wire arrangement, in particular with a metal mesh and/or a composite mesh, which can be arranged in at least some sections in the region of at least one surface of the aviation vehicle immersed in the flow, in particular can be adhesively bonded and/or clamped onto the latter, wherein the metal wire arrangement has a ribbed structure with a multiplicity of ribs running essentially parallel to one another. As a consequence of the multiplicity of ribs running parallel to the flow direction, the arrangement of which can be compared with the structure of the sharkskin of known art, there ensues a reduction of the flow resistance of the surface on or over which the air flows of between 3% and 10%, as a result of which a significant fuel saving potential ensues in flight operations.

Abstract: A method for a thermal joining of two thermoplastic components includes arranging at least one reactive sheet entity in a mating zone between the two thermoplastic components. A multiply perforated metallic sheet entity configured as a bonding agent is disposed on each side of the at least one reactive sheet entity, at least in some regions of the mating zone. The at least one reactive sheet entity is activated so as thermally join the two thermoplastic components in the regions of the mating zone.

Abstract: A device and method for acquiring deviations between a desired contour and an actual contour of a flexible component, in particular of a large-format metal sheet, taking into account the component's own weight. The device includes a plurality of stamps, arranged on a base area to form a stamp field, for accommodating the component at points of support, wherein each stamp comprises at least one force measuring sensor for measuring a weight force Fm that acts at the point of support, and at least one distance measuring sensor for measuring a travel path Sm travelled by the stamp. For each point of support a theoretical weight force Fg and/or a theoretical travel path Sg can be determined from component data, wherein the force measuring sensors and the distance measuring sensors are coupled to the computing unit, and the stamps are designed so as to be controlled by the computing unit, and independently of each other can travel at least essentially perpendicularly to the base area.

Abstract: A device for reducing the aerodynamic drag of a leading surface of an aircraft includes at least one air permeable structure disposed in an area of the leading surface and a suction device configured to interact with the at least one air permeable structure.

Abstract: The invention relates to a planar structure for joining, in particular for the material-uniting joining, of at least two components. According to the invention, the planar structure is flexible and formed by at least one reaction strand. The reaction strand comprises a preferably cylindrical core, which is provided, at least in some areas, with a coating, which is constructed with a plurality of coaxially applied layers with a small thickness. To produce the layers, two different materials are used, the layers being constructed alternately with one of the two materials. Because of the high degree of flexibility of the reactive planar structure and its arbitrary area extent, components with a complex geometry in the region of the joint faces as well as large-format components can be joined in a material-uniting manner without problems.

Abstract: A device and method for acquiring deviations between a desired contour and an actual contour of a flexible component, in particular of a large-format metal sheet, taking into account the component's own weight. The device includes a plurality of stamps, arranged on a base area to form a stamp field, for accommodating the component at points of support, wherein each stamp comprises at least one force measuring sensor for measuring a weight force Fm that acts at the point of support, and at least one distance measuring sensor for measuring a travel path Sm travelled by the stamp. For each point of support a theoretical weight force Fg and/or a theoretical travel path Sg can be determined from component data, wherein the force measuring sensors and the distance measuring sensors are coupled to the computing unit, and the stamps are designed so as to be controlled by the computing unit, and independently of each other can travel at least essentially perpendicularly to the base area.