Abstract:
Um eine Blechkonstruktion in Honeycombbauweise aus schweißgeeigneten Werkstoffen, bestehend aus wenigstens zwei durchgehenden Deckblechen (1,2) und diese verbindende Aussteifungen (3), derartig auszubilden, daß beide Deckbleche (1,2) in einfacher Weise und sicher mit den Aussteifungen (3) verschweißt werden können, sind die Aussteifungen (3) mit wenigstens einem der Deckbleche (1) durch dessen Wand (9) hindurch von außen verschweißt und die Schweißnaht (5) verläuft pendelnd um die Längserstreckung der anliegenden Kanten der Aussteifungen (3), wobei sie abschnittsweise ein- oder beidseitig neben der anliegenden Kante (10) liegt.
Abstract:
A core structure (50), apparatus (170), and method which utilize laser bonding to fabricate the core structure. The core structure (50) is characterized by laser bonds (14) in patterns between adjacent sheets (20, 22, 24, 26, 28) of aluminum, stainless steel, and titanium foil which create honeycomb core structures (50) when the bonded stack of sheets is expanded by the application of tensional forces thereto. A variable density core structure (50) incorporates honeycomb cells (34) of conventional size and a higher density honeycomb core structure (60) is formed integrally with the original core structure (40). The higher density core (60) has cells (62) which are much smaller than the cells (34) of the original core structure (40). The apparatus (70) achieves the fabrication of the core structure and the steps of the method are practised by either hand or utilization of the apparatus.
Abstract:
In a process for soldering partial areas (5) of a metallic structure (2, 4), a sticky material is applied on the partial areas (5) and then soldering powder is applied thereon, which adheres to the sticky material. The sticky material retains its stickiness up to temperatures of at least 180°, preferably above 200 °C, so that when the structure (2, 4) is thermally treated, in particular thermally degreased, no soldering powder is lost. This process is particularly suitable to produce catalyst carrier bodies (1) for catalytic converters of internal combustion engines, since during its production two different connections have to be achieved, i.e. binding the honeycombed body itself (4) to a tubular casing (2) and assembling individual sheet metal layers of the honeycombed structure (4). Different soldering techniques can be successively applied with no loss of the initially applied soldering powder.
Abstract:
This invention aims at manufacturing a metal support capable of activating a catalyst in a short period of time, and, especially, a method of combining an insulating film-carrying heat resisting alloy having an insulating film consisting mainly of alumina with a heat resisting alloy by arranging a forcibly reducing metal capable of thermodynamically reducing alumina and a solder-laminated bond so that the forcibly reducing metal is in contact with the insulating film-carrying heat resisting alloy, and soldering these metals to each other by heating the same in a non-oxidizing atmosphere. Consequently, only the portions that are to form conductive passages in a honeycomb structure can be combined, and heat resisting metals having insulating oxide films on the surfaces thereof firmly so that they have conductivity. A preheated type metal support capable of being heated at a limited surface layer portion on its exhaust gas inlet side and having excellent cleaning performance can be provided by using this soldering method.
Abstract:
Es wird vorgeschlagen, Lötverbindungen an wabenförmigen metallischen Katalysator-Trägerkörpern mittels Laserstrahl herzustellen, indem die zu verlötenden Bereiche (5, 6) auf Löttemperatur aufgeheizt werden, ohne daß dabei der Schmelzpunkt der zu verlötenden Materialien überschritten wird. Auch oxydierbare Metalle können so evtl. ohne Schutzgas oder Vakuum hochtemperaturgelötet werden. Die Laserstrahlen (8a, 8b) können beispielsweise von den Stirnseiten unter bestimmten Winkeln auf den Katalysator-Trägerkörper einwirken und die zu verlötenden Bereiche (5, 6) aufheizen. Der Katalysator-Trägerkörper kann dementsprechend beim Wickeln oder später belotet und dann verlötet werden. Auf diese Weise ist eine einfache und schnelle Herstellung haltbarer Katalysator-Trägerkörper möglich.
Abstract:
A method (100) of manipulating a thin-walled structure (200; 402; 502; 602; 702; 802; 900) includes providing a thin-walled structure in a first unconstrained configuration, constraining the thin-walled structure (200; 402; 502; 602; 702; 802; 900) to a first constrained configuration in which a first feature of the thin-walled structure is spatially located relative to the a second feature of the thin-walled structure in a predetermined manner, wherein an open volume of the thin-walled structure is constrained to maintain a predetermined open volume shape, and machining the thin-walled structure to a second constrained configuration in which the first feature of the thin-walled structure remains spatially located relative to the second feature of the thin-walled structure in the predetermined manner.
Abstract:
A component (1) is composed of a plurality of individual layers (2, 3, 4) and is formed as a honeycomb construction with partial hollow bodies (26, 27) projecting beyond the base construction (16). Surfaces (10, 11) of adjacent individual layers (2, 3, 4) here together form a wall of small wall thickness. Individual surfaces (10, 11) of the individual layers (2, 3, 4) have a prestress in order to improve the connection with adjacent surfaces.