Abstract:
A connector which provides a joint between two double skin composite panels of a structure. Each double skin composite panel comprises a pair of metal icing plates joined together by a plurality of cross-members and filled , at least partially, with a cementitious filler material. Each cross-member is connected to both facing plates and the connector comprises one or more seamless sections.
Abstract:
A method of brazing a honeycomb for air sealing onto a braze surface of the front end of the stationary blade of an axial-flow compressor in accordance with the invention includes the steps of: placing a filler sheet between the honeycomb and the braze surface; constraining the honeycomb in the seal width direction so that the seal width direction of the honeycomb corresponds to the seal width direction of the braze surface while keeping the figure of the honeycomb at the same curvature with that of the braze surface; and heating the assembly to braze the honeycomb and the braze surface.
Abstract:
A method is disclosed for manufacturing a monolithic metal support with a coated, gas-permeable shaped body. The shaped body is formed of one or more smooth and/or corrugated metal foil strips previously coated with a dispersion coating. During or after formation of the shaped body, the metal foil strips are joined by soldering or welding to at least one adjacent metal foil strip or to at least one adjacent layer of the same metal foil strip.
Abstract:
Apparatus for installation of honeycomb core seals in jet engine mounting rings, including spray deposition of brazing alloy in seals and establishment of compressive relationships between seal and ring prior to brazing of seal in ring.
Abstract:
A method and apparatus for laser cutting of multiple stacked metal worksheets is disclosed wherein the tendency of the sheets to separate during the cutting operation is restrained. In one embodiment the laser head is pressed downwardly against the stacked worksheets which are supported on a ball-transfer work table. In other embodiments where it is not possible to press the laser head against the stacked worksheets because of the construction of the work table, the worksheets are coated with a viscous fluid so as to increase surface tension effects and thereby generate adhesive forces between adjacent sheets sufficient to resist the pressure of cutting assist gases which would otherwise cause separation of the sheets.
Abstract:
Method and apparatus for installation of honeycomb core seals in jet engine mounting rings, including spray deposition of brazing alloy in seals and establishment of compressive relationships between seal and ring prior to brazing of seal in ring.
Abstract:
A method for pre-oxidizing a nickel alloy honeycomb core by heating the core while exposing the core to a controlled flow of an oxygen containing gas, such as dry air. The preoxidized core can be brazed in a vacuum furnace to two face sheets to manufacture a honeycomb panel using thin foil brazing material. The methods of preoxidation and panel production for Inconel 718, Rene' 41 and Inconel 625 are specifically described.
Abstract:
A method of manufacturing a control grid used in a fluorescent display tube is disclosed. The grid is produced by preparing a fine wire net, placing the wire net upon a metal frame member, and irradiating laser beams to the contact portions of the wire net and frame to weld the wire net and the frame.
Abstract:
A process is provided for fabricating a structure by vacuum brazing tantalum alloy elements in which a columbium-vanadium brazing foil is placed between surfaces of the elements to be joined; a coating of yttria powder is applied to surfaces of elements that will be in contact with a tungsten hearth plate and tungsten pellets; the structure is positioned on the tungsten hearth plate in a vacuum heating zone with tungsten pellets disposed on top of the portion of the upper element to be joined so as to exert pressure thereon and control the gap between the surfaces to be joined; the elements are heated under a vacuum in the vacuum heating zone to a temperature sufficient to melt the brazing foil; and after soaking at that temperature for several minutes the elements are gradually cooled to room temperature. The vacuum brazing process is particularly suitable for use in fabricating honeycomb sandwich panels, utilizing tantalum alloy structural elements.