Abstract: A driveshaft for an aircraft ram air turbine includes a substantially cylindrical elongate portion, a first end extending from the elongate portion, and a second end extending from the elongate portion opposite the first end. The first and second ends each include a substantially frusto-conical section having a curved generatrix, such that distal portions of each of the first and second ends have smaller outer diameters than an outer diameter of the elongate portion. The elongate portion provides relatively high lateral stiffness and the first and second ends provide relatively low torsional stiffness, such that the driveshaft has a lateral natural frequency higher than an operating range of the driveshaft and has a torsional natural frequency below the operating range of the driveshaft.

Abstract: [Object] To provide a joining method for dissimilar metals which are magnesium alloy and steel and difficult to be metallurgically directly joined to each other while oxide film is present at a joining surface. [Solving Means] In order to join magnesium alloy material 1 and steel plate 2 to each other, a galvanized steel plate to which Zn—Al—Mg alloy plating (a third material) is applied is used as the steel plate 2. When joining is made, ternary eutectic melting of Al—Mg—Zn is caused, so that it is discharged together with oxide film 1f and impurities from the joining interface while Al—Mg intermetallic compound such as Al3Mg2 and Fe—Al intermetallic compound such as FeAl3 are formed, thereby joining the newly generated surfaces of the magnesium alloy material 1 and the steel plate 2 to each other through a compound layer 3 containing these intermetallic compounds.

Abstract: A method for joining a first bar end-on to a second bar by means of electron beam welding at a welding point is provided. The method includes the following steps, aligning the two bars with each other along a longitudinal axis, applying a sleeve, which surrounds the welding point in the circumferential direction with respect to the longitudinal axis, welding at the welding point by means of electron beam welding, wherein an electron beam welding apparatus is made to pass along an advancing direction, along in relation to a surface of the sleeve and along the welding point, and removing the sleeve.

Abstract: The invention relates to a rotor (1) of a turbomachine, in particular of an exhaust gas turbocharger, with a rotor wheel (2) which has a wheel back (3), and with a rotor shaft (4) which has an intermediate piece (5), via which the rotor shaft (4) is connected rigidly to the rotor wheel (2), the intermediate piece (5) being provided with a disk-shaped balancing plate (5A), the outside diameter (DA) of which is larger than the largest diameter (D4C) of the rotor shaft (4) and which is fixed to the wheel back (3) of the rotor wheel (2).

Abstract: A method for making a tube is described in which a multi-layer billet is extruded to provide a tube having a wall comprising an inner layer metallurgically bonded to an outer layer.

Abstract: A turbine rotor as a turbine impeller made of a high-temperature-resistant metal alloy and a rotor shaft made of steel. The impeller hub and the rotor shaft end are connected together in a metallurgically bonded manner by way of a brazed connection. Between the end faces of the impeller hub and of the rotor shaft end, a brazing gap filled with brazing alloy is arranged concentrically with the rotation axis of the turbine rotor. A width of the soldering gap is previously determined by circularly peripheral removal of material on the end face of the impeller hub or the end face of the rotor shaft end, and the brazing connection is produced by an electron beam soldering process.

Abstract: A method of fabricating a load compressor scroll housing includes the steps of forging near net shape parts that are machined and subsequently welded together. The forged portions are machined to define specific features of the scroll housing along with the mating surfaces. An interface between top and bottom portions is defined within the volute chamber. The weld joint at the interface provides a finished surface within the volute chamber such that airflow is not adversely affected and additional machine process are not required within the volute chamber after formation of the weld joint.

Abstract: A turbine rotor for an exhaust gas turbine has a turbine rotor wheel made of a highly heat-resistant metal alloy and a rotor shaft made of steel. A rotor wheel hub and a rotor shaft end are connected to each other in a metallurgical bond by way of a solder connection. The rotor shaft end and/or the rotor wheel hub is formed with a central recess, which acts as a thermal choke. A closing plug is arranged in the respective recess, forming a closed cavity with the recess and closing off the recess toward the respective end face. The solder connection is formed between the end faces of the rotor wheel hub and the rotor shaft, between the closing plug and the rotor wheel hub, and between the closing plug and the rotor shaft.

Abstract: A tailored blank for hot stamping includes a welded portion formed by butt-welding a first aluminum-plated steel sheet and a second aluminum-plated steel sheet, an Average Al concentration of a weld metal in the welded portion is in a range of 0.3 mass % to 1.5 mass %, an Ac3 point of the weld metal is 1250° C. or lower, and furthermore, an aluminum layer formed during the butt-welding is present on a surface of the welded portion.

Abstract: A welding head is provided. The welding head includes a bracket and a plurality of blocks coupled to the bracket. Each of the plurality of blocks has a contact tip. The contact tips are adapted to receive an electrode. Further, at least one of the plurality of blocks is capable of variable positioning relative to the bracket.

Abstract: According to one aspect of the invention, a method for assembling a turbine includes placing a middle layer between a first and second outer member, wherein the middle layer includes a non-continuous layer of material and the first and second outer members each include a member of continuous material and welding a primary joint between the middle layer, first outer member and second outer member, the primary joint extending through the first outer member, the middle layer and at least a portion of the second outer member. The method also includes welding a secondary joint between the middle layer and first outer member, the secondary joint extending through the first outer member and at least a portion of the middle layer.

Abstract: A method for producing a hollow valve of an internal combustion engine may include providing a hollow valve stem, a valve cone, and a valve bottom; pushing the valve cone over the valve stem via a press fit, wherein the valve cone includes an outer surface transitioning to the valve stem to define a testing surface; and welding the valve cone to the valve stem via at least one of a laser beam and an electron beam, wherein the welding occurs such that no melting of the outer surface in the region of the testing surface of the valve cone occurs.

Abstract: In a method for controlling pulse arc welding where an arc is created between a wire and a base material, a pulse waveform different from the pulse waveform for steady-state welding is outputted when a predetermined time has passed since short-circuit welding control was started at arc start, and after a sufficiently large melt pool is formed, the pulse waveform for the steady-state welding is outputted. This reduces the generation of spatters after an arc is created and until the arc is stabilized.

Abstract: A method for beam welding a multi-sheet work stack includes positioning a first sheet adjacent to a second sheet, and positioning a third sheet adjacent to the second sheet such that a single common welding interface is defined. An energy beam is directed onto the interface until a fusion weld forms along the interface. The third sheet may define a flange or a tab portion. The flange portion may be placed in direct contact with the first sheet along the interface, while the tab portion may be inserted into a slot of the second sheet to contact the first sheet at the interface. The beam may be a laser or ion beam. The lower melting temperature sheet may be positioned farther from the source of the energy beam than the other sheets. The welded assembly may be a battery module, with the sheets being an interconnect member and battery tabs.

Abstract: An improved header assembly and corresponding port assembly comprising a tensioning member, wherein the tensioning member is isolated and separate from the weld portion and is adapted to place a threaded portion between the header assembly and port assembly in tension and maintain such tension, and thus relieve tension from the weld, before and after welding, thereby increasing the lifespan of the header and port assemblies.

Abstract: The invention provides products of manufacture, e.g., biomaterials and implants, for cartilage maintenance and/or formation in-vivo, in-vitro, and ex-vivo, using nanotechnology, e.g., using nanotube, nanowire, nanopillar and/or nanodepots configured on surface structures of the products of manufacture.

Abstract: An apparatus for forming at least one three-dimensional article by fusing parts of a powder bed layer-wise. The apparatus comprising a powder distributor and an energy beam for fusing the powder layer. Said powder distributor comprises a first part being an elongated rod provided movable at a predetermined distance above the powder bed and with its central axis in parallel with a top surface of said work table and second part being a metal foil having at least a first and a second opposite edge portions. Said metal foil is provided between said elongated rod and said work table, said first and second opposite edge portions are attached to said elongated rod so that a distance between said first and second edge portions is smaller than the distance between said first and second edge portions of said metal foil when said metal foil is in a flat position.

Abstract: A compact planetary differential gear set includes first (130A) and second (130B) sun gears, a first set (200A) and a second set (200B) of planet gears (220), and a carrier (160) with a ring gear (190). Enmeshing gear pairs (210) are formed from one planet gear from each set. The first and second planet gear sets enmesh the first and second sun gears, respectively. The ring gear does not extend into an annular region containing the planet gears thereby allowing four or more gear pairs to compactly fit into the annular region. The carrier is a weldment and substantially encloses the sun gears and the planet gears permanently. The differential requires no fasteners or post-weld machining and may have a higher capacity, lower cost, smaller size, lower part number count, and/or lower amounts of material compared with conventional differentials. The differential is suited for motor vehicle applications.

Abstract: The invention relates to a method for welding rotors for power generation such as gas turbines, steam turbines, and generators having a plurality of rotor discs arranged along a rotor axis. The method includes providing said discs with a weld seam preparation. The weld seam preparation includes a root, a first, gap-like welding section adjoining the root in radial direction, and a second, gap-like welding section adjoining the first welding section in radial direction. The method further includes melting the root by means of a first welding process; making a weld in the first welding section by means of a second welding process; and filling up the second welding section by means of a third welding process.

Abstract: A welding process, welding system and welded article are disclosed. The welding process includes directing energy from one or more fusion beams to join a first element to a second element and to join the first element to a third element. The directing of the energy is at a first lateral angle and a second lateral angle with respect to the first element. The welding system includes an energy emitting device, a first fusion beam and a second fusion beam. The first fusion beam and the second fusion beam are oriented to extend diagonally through an article. The laser welded article includes the first element joined to the second element, and the first element joined to the third element. A fillet weld is formed in a first inaccessible portion between the first element and the second element and a second inaccessible portion between the first element and the third element.

Abstract: A downhole tool and method for manufacturing such downhole tool. The downhole tool includes a bit body having a blank and a matrix bonded to and surrounding the blank, a shank having a threaded connection at one end, and a butt joint formed within a gap formed between the blank and the shank and coupling the blank to the shank. The blank includes a first planar surface while the shank includes a second planar surface opposite the one end. The butt joint is formed between the first and second planar surfaces when positioned adjacent to one another, wherein the first planar surface is positioned external to the matrix.

Abstract: A welding method for an outer joint member of a constant velocity universal joint includes constructing a cup section having track grooves, which engage with torque transmitting elements, formed along an inner periphery thereof and a shaft section that is formed on a bottom portion of the cup section by two or more separate members, joining a cup member forming the cup section and a shaft member forming the shaft section, and melt-welding end portions of the cup member and the shaft member. The cup member and the shaft member are shaped so that a sealed hollow cavity portion is formed when the end portions of the cup member and the shaft member are brought into abutment against each other, the melt-welding of the end portions being performed when the sealed hollow cavity portion is under atmospheric pressure or lower.

Abstract: A method for producing a fork arm (18) for load-carrying devices, said fork comprising a fork blade (5) which is substantially horizontal in the operating position, and a substantially vertical fork back (20) that connects via a fork bend (19) to said fork blade and is provided with connection elements (2, 3) for the conveying device, wherein the fork arm consists of a plurality of parts (1; 2, 4, 8, 9, 11; 18?, 12 to 17) that are connected to one another, at least a number of said parts are welded to one another, and parts (1; 2, 4, 8, 9, 11; 18?, 12 to 17) of the fork arm are welded to one another by electron beam welding and/or laser welding, wherein the weld penetrates planarly with a depth of at least 15 mm between adjoining surfaces of the parts.

Abstract: Methods and systems are provided for using optical interferometry in the context of material modification processes such as surgical laser or welding applications. An imaging optical source that produces imaging light. A feedback controller controls at least one processing parameter of the material modification process based on an interferometry output generated using the imaging light. A method of processing interferograms is provided based on homodyne filtering. A method of generating a record of a material modification process using an interferometry output is provided.

Abstract: In a method for beam welding on components with a laser beam or electron beam generated by a beam source, the heat treatment of the welded component required to remove stresses is integrated into the welding process. In a work cycle combined with the welding process, a regulated heat supply to a selected region takes place, according to its residual heat resulting from the welding process and the predicted stresses in that region, using the residual heat remaining from the welding process following the welding process from the same or other beam source(s). The welding region is cooled in a controlled manner, so that welded components which are likely to be subject to high stress in use, provided for example for a aircraft engine, can be made available without inherent stresses and with the desired microstructure in a single—combined—work step.

Abstract: A method of forming a bonded assembly (10). The method comprises: providing at least first and second parts (12, 14) of an assembly (10) to be bonded; assembling the first and second parts (12, 14) in a required relative position to define a bond interface region therebetween; sealing part way along an edge (18) of the bond interface region using laser beam welding to define a cavity between the first and second parts (12, 14); in a vacuum environment, sealing the remainder of the edge (20) of the bond interface region using electron beam welding to form a fluid tight seal around the cavity; and applying heat and pressure to an external surface of the cavity to diffusion bond the first and second parts (12, 14) together.

Abstract: A sharpened metallic probe having a top of main body including a carbon-containing metal and a method and an apparatus for fabricating the metallic probe. A metallic probe with an extremely sharpened tip is obtained by inducing a field emission from the tip of the main body of the metallic probe where a nanotube is joined thereto, heating and melting locally the tip of the main body of the metallic probe by a Joule heating, and tearing the nanotube toward a counter electrode by a Coulomb attractive force.

Abstract: A high-energy density beam welding process for two panels includes a step that include placing a metal band on the upper face of at least one panel, in the axis of the desired welded joint before welding the panels, so that the metal band is inserted between the panels and the high-energy density beam during the welding step, and so that the thickness of this metal band integrates all of the geometric faults present on the surface of the welded joint.

Abstract: A method for joining first and second metal portions includes welding together the portions such that a weld nugget joins them, compressively stressing the weld nugget throughout its volume, and heat treating the compressively stressed weld nugget to recrystallize metal therein. A method for strengthening a metal element includes imparting compressive stress within a region of the metal element, and heat treating it such that metal of the region recrystallizes with a finer grain structure than was present in the region before the step of imparting the compressive stress. A repaired metal part includes a first, original section made of metal alloy, and a second, repair section of metal alloy joined to the original section by a recrystallized metal weld having crystals within +/?3 ASTM-112 grain sizes of the size of the crystals of the original and repair sections.

Abstract: A method for layer-by-layer manufacturing of a three-dimensional work piece, including: (a) delivering a metallic feed material into a feed region; (b) emitting an electron beam; (c) translating the electron beam through a first predetermined raster pattern frame that includes: (i) a plurality of points within the feed region; and (ii) a plurality of points in a substrate region that is outside of the feed region; (d) monitoring a condition of the feed region or the substrate region for the occurrence of any deviation from a predetermined condition; (e) upon detecting of any deviation, translating the electron beam through at least one second predetermined raster pattern frame that maintains the melting beam power density level substantially the same, but alters the substrate beam power density level; and (f) repeating steps (a) through (e) at one or more second locations for building up layer-by-layer.

Abstract: A method for connecting different types of metallic joining partners using a radiation source, the two joining partners, having a different melting temperature, at least indirectly making contact lying against each other in the region of a joining zone, and the radiation source introducing its radiation energy into the one joining partner in a region next to the joining zone. It is provided that, because of the radiation source in the joining zone only the joining partner having a lower melting temperature is melted.

Abstract: Methods for welding a joint are disclosed herein. One example of the method involves welding the joint between two workpieces. Energy is focused onto the joint to weld the joint. The focus of the energy moves relative to the joint. A vaporized material is displaced from a keyhole created by the welding. The vaporized material is vaporized by the energy. A pool of molten material is formed adjacent the keyhole during operation of the energy at the joint. The pool of molten material is manipulated by displacing a portion of the molten material from a near end of the pool and from lateral sides of the pool to a far end of the pool. The far end of the pool is distal to the near end.

Abstract: An electrical interconnect is disclosed that includes an inner conductive material having a top surface and a bottom surface; and an outer conductive material different from the inner conductive material, wherein the outer conductive material is clad on the top and bottom surfaces of the inner conductive material, wherein the electrical interconnect is configured to be secured to a first terminal of a first electrochemical cell and a second terminal of a second electrochemical cell. A method of manufacturing an electrical interconnect is also disclosed.

Abstract: A process chamber is configured to contain a work piece in a controlled atmosphere and to perform a process that emits pyrophoric particulates. A closed recirculating loop connected with the process chamber recirculates gas defining the controlled atmosphere through the process chamber. A filter in the closed recirculating loop captures the generated pyrophoric particulates in the recirculating gas. A valve set has a work configuration defining the closed recirculating loop including the connection of the process chamber with the filter, and a filter regeneration configuration in which the filter is blocked off from the process chamber and is connected with an exhaust. A work piece is loaded into the process chamber. With the valve set in the work configuration, the process is performed on the loaded work piece. Thereafter, regeneration gas containing oxygen is delivered to the filter with the valve set in the regeneration configuration.

Abstract: A method of closing off a mold plug opening in a turbine component includes the steps of inserting a weld member into an opening to be closed, and to abut a necked portion within a passage leading from the opening. Heat is applied to the weld member, such that a surface of the weld member in contact with the necked portion liquefies, and such that the weld member adheres to the necked portion, closing off the opening. The weld member and application of heat are selected such that the entirety of the weld member does not liquefy, but remains in the opening, without ever having liquefied. A turbine component formed by the method is also disclosed.

Abstract: An electricity storage device includes an electricity storage element that is constituted by an electrode body in a positive side and an electrode body in a negative side that face each other while holding a separator; a sealing member that seals a case member accommodating the electricity storage element; at least one electrode protrusion that is either of the electrode bodies, which protrudes from an element end-face of the electricity storage element, at least one current collector plate that is connected to the electrode protrusion; and a terminal member that is installed in the sealing member, a lateral face of the terminal member being connected to a lateral face of the current collector plate.

Abstract: A process of fabricating a shield, a process of preparing a component, and an erosion shield are disclosed. The process of fabricating the shield includes forming a near-net shape shield. The near-net shape shield includes a nickel-based layer and an erosion-resistant alloy layer. The nickel-based layer is configured to facilitate secure attachment of the near-net shaped to a component. The process of preparing the component includes securing a near-net shape shield to a substrate of a component.

Abstract: Production method for a monobloc rifle receiver of aluminium or aluminium alloy, characterised in that this method consists of the realisation of individual parts of the receiver, which, in an assembled state can form a receiver; followed by any mechanical adjustments; followed by the assembly of these parts (8) by welding.

Abstract: A method for soldering or welding components in a series production wherein: a fixing seam which connects the components (1, 2) is produced by melting a connecting material (3), which is supplied as an additional material or is formed by a base material of the components (1, 2), along a joint formed by the components (1, 2); and a volume-forming layer of connecting material is deposited onto the fixing seam by melting, or the fixing seam produced by means of the connecting material supplied as an additional material is re-melted.

Abstract: Aspects described herein relate to an open chamber gun mechanism comprising a frame and a cylinder assembly that forms an open chamber positioned for rotation within the frame, said open chamber including an insert positioned within the open chamber, the insert forming an expandable region between the open chamber and cylinder. According to one embodiment, the insert is configured to deflect into the expandable region upon firing the open chamber gun mechanism.

Abstract: The present invention refers to a method for joining at least two workpieces, the method comprising the following method steps: providing and positioning the workpieces to be joined; providing at least one joining element; heating the joining element to a temperature substantially equal to its plasticizing temperature with at least one heat source; heating the workpieces at least in the region of a joint to a predetermined reaction temperature; and applying material of the joining element to the region of the joint with a relative movement taking place between the joining element and the region of the joint.

Abstract: A butt-welded joint includes a pair of steel plates, a first weld metal that is formed at a butting portion of the pair of steel plates from a side of a first surface of the butt-welded joint to a side of a second surface opposite the first surface by irradiation of a first high-energy density beam from the side of the first surface, and a second weld metal that is formed by irradiation of a second high-energy density beam to cover an end surface of the first weld metal at the side of the first surface side of the first weld metal. A width W1 of the first weld metal on the first surface and a width W2 of the second weld metal on the first surface satisfy an equation 1.2?W2/W1?3.5, and a depth of the second weld metal from the first surface is 2.0 mm to 10.0 mm.

Abstract: A method of manufacturing a fiber reinforced metal matrix composite article, the method comprises forming a first metal component, forming a second metal component and forming at least one fiber preform comprising at least one metal coated fiber. The metal at least one first portion of the at least one metal coated fiber of the at least one fiber preform is bonded to the metal at least one second portion of the at least one metal coated fiber of the at least one fiber preform to hold the at least one fiber in position. The at least one fiber preform is placed between the first metal component and the second metal component. The second metal component is sealed to the first metal component, and heat and pressure is applied such as to consolidate the at least one fiber preform and to diffusion bond the metal on the fiber of the at least one fiber preform, the first metal component and the second metal component to form a unitary composite article. The bonding comprises ultrasonic welding.

Abstract: A feed-through, in particular a feed-through which passes through part of a housing, in particular a battery housing, for example made of metal, in particular light metal, for example aluminum, an aluminum alloy, AlSiC, magnesium, an magnesium alloy, titanium, a titanium alloy, steel, stainless steel or high-grade steel. The housing part has at least one opening through which at least one conductor, in particular an essentially pin-shaped conductor, embedded in a glass or glass ceramic material, is guided. The base body is, for example, an essentially annular-shaped base body.

Abstract: Embodiments disclosed herein relate to a large vacuum chamber body that has been welded together. The chamber body may have a high emissivity coating on at least one surface therein. Due to the large size of the chamber body, the chamber body may be formed by welding several pieces together rather than forging the body from a single piece of metal. The pieces may be welded together at a location spaced from the corner of the body, which may be under the greatest stress during evacuation, to ensure that the weld, which may be the weakest point in the body, does not fail. At least one surface of the chamber body may be coated with a high emissivity coating to aid in heat transfer from incoming, heated substrates. The high emissivity coating may increase substrate throughput by lowering the time that may be needed to reduce the substrate temperature.

Abstract: The present invention efficiently processes work pieces by transferring them without bringing them outside. The present invention comprises: a stage 4 for working, which is used when working a work piece D, L by irradiating a focused beam B while observing the work piece D, L in an observation region W of a previously determined range, and possessing a table 10 having plural mount bases 2, 3 on whose upper faces 2a, 3a there can be respectively mounted the work piece D, L; and a rotation slant means 11 rotating respectively the mount base 2, 3 about a Z-axis perpendicular to the upper faces 2a, 3a and slanting the upper faces 2a, 3a to an arbitrary angle, wherein the table 10 is made possible to move so as to dispose respectively the plural mount bases 2, 3 to an inside of the observation region W.

Abstract: A data structure for weld programs associates configuration data for a welding system with a plurality of weld programs and weld sequence data. The data structure allows the welding system to be configured for a particular part, operator, or stage in a welding process, and to be easily reconfigured when the part, operator, or stage changes, providing improved efficiency and flexibility in operation.

Abstract: Described herein are methods of constructing a part using BMG layer by layer. In one embodiment, a layer of BMG powder is deposited to selected positions and then fused to a layer below by suitable methods such as laser heating or electron beam heating. The deposition and fusing are then repeated as need to construct the part layer by layer. One or more layers of non-BMG can be used as needed. In one embodiment, layers of BMG can be cut from one or more sheets of BMG to desired shapes, stacked and fused to form the part.

Abstract: Embodiments include a base for an electrostatic chuck (ESC) assembly for supporting a workpiece during a manufacturing operation in a processing chamber, such as a plasma etch, clean, deposition system, or the like. Inner and outer fluid conduits are disposed in the base to conduct a heat transfer fluid. In embodiments, a counter-flow conduit configuration provides improved temperature uniformity. The conduit segments in each zone are interlaced so that fluid flows are in opposite directions in radially adjacent segments. In embodiments, each separate fluid conduit formed in the base comprises a channel formed in the base with a cap e-beam welded to a recessed lip of the channel to make a sealed conduit. To further improve the thermal uniformity, a compact, tri-fold channel segment is employed in each of the outer fluid loops. In further embodiments, the base includes a multi-contact fitting RF and DC connection, and thermal breaks.

Abstract: When a turbine impeller (4) formed from an Ni-based superalloy and a rotor shaft (2) formed from a steel material are joined by being fused together via welding in a boundary portion, a mixing ratio of a welding metal (6) that is formed in the boundary portion by fusing together the Ni-based superalloy forming the turbine impeller (4) and the steel material forming the rotor shaft (2) is between 0.5 and 0.8. As a result, it is possible to obtain a sound welding joint in which there are no cracks in the boundary between the welding metal (6) and the Ni-based superalloy (4).