Abstract:
The present invention provides a method of repairing welds in aluminium sandwich panels (1) comprising the steps of: making the root bead (2) of the weld (3) to be repaired by tungsten inert gas welding (TIG); and making up the remainder of the weld by metal inert gas welding (MIG).
Abstract:
A multi-shouldered friction stir welding tool (10) comprises an integral shank-pin unit (11) having a plurality of pin portions on the shank-pin unit, where the plurality of pin portions for driving into a plurality of joints to perform a friction stir welding operation on the corresponding plurality of joints and, where a shank portion of the shank-pin unit is for attachment to an optional axial tension rod (19), each of the friction stir welding modules comprises a pair of shoulders (13, 14) that is connected to the shank-pin unit where each shoulder has a distal end and a proximal end, where the proximal end of each shoulder faces the pin portion of the shank-pin unit, whereby the shoulder and pin(s) rotate in unison, and a pair of split collars or a pair of nuts that is connected to the shank-pin unit and faces the distal end of each shoulder, where the plurality of friction stir welding modules are connected to each other whereby the modules rotate in unison to simultaneously make a plurality of parallel welds. In addition, a method of friction stir welding a plurality of joints simultaneously comprising using at least one multi-shouldered friction stir welding tool is provided.
Abstract:
To form high performance bonding connections, which are suitable for producing micro-structured components (1) made of a plurality of individual layers (2, 3', 3"), there is proposed a bonding method that comprises the following method steps: a) providing said at least two work pieces (2, 3', 3"); b) forming a respective metal bonding layer (4) on at least one side of at least one of said at least two work pieces (2, 3', 3") by means of a chemical or an electrolytic metal plating method, wherein the metal bonding layer (4) consists of a nickel/phosphorous alloy having a phosphorous content within a range of from 1 to 14 percent by weight and has a thickness within a range of 0.5 - 10 μm; c) forming a bonding arrangement comprising said work pieces (2. 3*. 3") in such a manner that there is at least one metal bonding layer (4) between said at least two respective work pieces (2, 3', 3"); d) heating the bonding arrangement at a heating rate of from 5 to 30 K/min to a bonding temperature in excess of the melting temperature of the metal bonding layer (4); e) bonding said at least two work pieces (2, 3\ 3") at the bonding temperature by applying a contact pressure within a range of at least 10 kPa; f) cooling the bonding arrangement at a cooling rate within a range of from 10 to 100 K/min.
Abstract:
An embodiment provides a method of constructing a cellular structure having nodes (24) therein comprising: providing at least one truss layer (23) comprised of at least one truss unit, at least one of the truss units being comprised of truss members (22); providing at least one panel (21) in mechanical communication with the at least one truss unit of the at least one truss layer, the mechanical communication defined contact regions wherein the at least one truss unit is coupled to the at least one panel; the nodes being defined as intersections existing among any of the truss members and the nodes also being defined by the contact regions (33); providing at least one node pin (41), the at least one node pin spanning between two desired the nodes; and diffusion bonding at least one of the truss layer to the at least one panel. The bonding includes: applying heat, and applying force that results in the truss layer and the panel that are being bonded to be pressed together, the node pins provide support for the structure so as to concentrate or transmit the applied force onto the contact regions.
Abstract:
Die Erfindung betrifft ein Leichtbauerlement mit einer inneren Fachwerkstruktur aus Leichtmetall, welches aus mehreren, miteinander in einer flächigen Anordnung gefügten, stranggepressten Hohlprofilen (1, 2, 3) besteht, wobei das Leichtbauelement einen umschriebenen Kreis mit einem Durchmesser von wenigstens 300 mm und eine Wandstärke von maximal 0,5 % dieses Werts aufweist.
Abstract:
The invention relates to a method for manufacturing an outlet nozzle (1) for use in rocket motors, which outlet nozzle (1) is configured with a wall structure comprising a plurality of mutually adjacent cooling ducts (5; 5') extending substantially from the inlet end (6) of the outlet nozzle (1) to its outlet end (7), which method comprises positioning of an outer wall (3) around an inner wall (2), configuration and positioning of a plurality of distancing element (4; 4') between the said outer wall (3) and the said inner wall (2), and joining of the said distancing elements (4; 4') between the said inner wall (2) and the said outer wall (3), whereupon the said cooling ducts (5; 5') are formed. The invention is characterized in that the said joining is realized by means of laser-welding and is arranged for the configuration of weld joints (9; 9') which, in a cross section through the wall structure, are substantially T-shaped and have a shape (10) which is rounded towards the inside of the cooling ducts (5; 5'). As a result of the invention, an improved manufacture of an outlet nozzle is obtained, more particularly offering low weight, low cost and optimal cooling properties.
Abstract:
A laser welding system is provided including a laser source (3) configured to produce at least one laser beam, beam modifying means (7) configured to split the at least one laser beam, directing means (4, 5, 17), and controlling means (12) configured to control the directing means (4, 5, 17). The controlling means (12) is configured to control the directing means (4, 5, 17) to cause the split laser beam to form at least two heat source points on the target (2), the heat source points maintaining a linear profile, and move the at least two heat source points in a travel direction along the target (2), wherein the linear profile forms a predetermined, oblique angle relative to the travel direction.
Abstract:
Die Erfindung betrifft eine Anordnung zur Herstellung einer Schweißverbindung zwischen zwei fluchtenden Profilen (8, 9; 27, 28; 35, 36), die auf Stoß zueinander angeordnet sind und eine innenseitige Schweißbadsicherung (5; 13; 16; 17) zur Abstützung eines flüssigen Schweißbades und zum Formen von Außenflächen der Schweißnaht durch Bereitstellen eines Aufnahmevolumens (10; 15; 22; 23) ausgebildet ist, wobei die Schweißbadsicherung (5; 13; 16; 17; 26; 31; 37; 38) derart ausgebildet und relativ zu den beiden Profilen (8, 9; 27, 28; 35, 36) angeordnet ist, dass eine Materialverteilung der Schweißbadsicherung (5; 13; 16; 17; 26; 31; 37; 38) und daran angrenzender Profilbereiche bezüglich einer am Ort der Schweißverbindung senkrecht zu den Profilen (8, 9; 27, 28; 35, 36) verlaufenden Verbindungsebene (V) derart gewählt ist, dass sich zu beiden Seiten der Verbindungsebene (V) in demselben Abstand (X1-X5) zur Verbindungsebene (V) durch Ränder der Materialverteilung einbeschriebene Kreise (K1-K5) desselben Durchmessers (D1-D5) ergeben.