Abstract: A metal matrix (2) for a heat exchanger (1), comprising a stack of components (4, 5, 6), in particular etched plates or corrugations (4), separator sheets (5) and bars (6), or a combination of the two types of stack, said components (4, 5, 6) being held relative to one another by layers of braze material (3), thereby ensuring the mechanical integrity of the matrix, the matrix including fluid circulation passages (10) within it, each fluid circulation passage (10) having an inner wall provided to fully contain said fluid radially, characterized in that each inner wall is fully covered with a corrosion-resistant coating (7). Preferred application to heat exchangers based on carbon steel or stainless steel.

Abstract: A method of joining a first pipe section to a second pipe section includes positioning the two pipe sections in an end-to-end configuration to define therebetween a joint to be welded, measuring the degree of alignment of the pipe sections when they are in the end-to-end configuration in a position ready for welding, ascertaining the relative movement required of the pipe sections in order to improve their alignment, effecting the relative movement so ascertained, and welding together the two pipe sections. The method may include the use of geometric data of the end of the pipes in order to ascertain the relative movement required of the pipe sections. A control unit may be used to calculate, using such data, a target orientation that lines up the pipe sections. The measuring step may be performed using, for example, a laser or a camera and backlight.

Abstract: A bonding apparatus includes a stage supporting a substrate, a first bonding head at a first side of the stage, the first bonding head to pick up a first chip and to bond the picked-up first chip onto the substrate, a second bonding head at a second side of the stage, the second bonding head to pick up a second chip and to bond the picked-up second chip onto the substrate, and a first image acquisition unit over a movement path of the stage to acquire an image of the stage.

Abstract: Use of an aluminium composite material in a thermal joining method, said material consisting of at least one aluminium core alloy and at least one external brazing layer consisting of an aluminium brazing alloy provided on one or both sides of the aluminium core alloy, wherein the aluminium brazing layer has a pickled surface. Reduced costs and a lower environmental impact is achieved by using an aluminium composite material in which the pickled surface of the aluminium brazing layer had been pickled by pickling with an acid, aqueous pickling solution containing at least one mineral acid and at least one complex-forming agent or a complexing mineral acid, wherein the removal of material in the pickling is between 0.05 g/m2 and 6 g/m2, the aluminium composite material is used in a flux-free, thermal joining method, and the joining method is carried out in the presence of a protective gas.

Abstract: An injection-molded solder (IMS) tool assembly apparatus, the apparatus including an IMS tool for dispensing a molten material via a round extrusion part to coat an inside or an outside wall of a pipe (and a chiller for providing cooling water to flow through an inside of the pipe.

Abstract: A friction stir welding apparatus that includes a rotary tool and a heating device. The heating device is placed in front of the rotary tool to heat steel sheets that are used as a workpiece. The rotary tool is moved in the welding direction so that steel sheet is softened by frictional heat. Additionally, the surface temperature, the area, and the position of the heated region during the heating process are strictly controlled. The heating of the steel sheets by the welding apparatus provides sufficient strength and good welding workability by advantageously eliminating plastic flow defects generated due to insufficient heating of workpieces.

Abstract: Some examples include welding a first workpiece to a second workpiece. For instance, the first workpiece may be secured adjacent to the second workpiece. At least one of the first workpiece or the second workpiece includes a channel or a portion of a channel in a respective surface such that a complete channel is presented when the first workpiece and the second workpiece are secured adjacent to each other. A rotating tip of a welding tool is inserted into the complete channel for welding the first workpiece to the second workpiece. A surface burr resulting from the welding is located within the complete channel.

Abstract: A component mounting system and a method for inspecting mounted components are provided. A component mounting system according to an embodiment, comprises a solder inspection apparatus comparing coordinate information of the solder, which is obtained through measurement of a substrate to which solder is applied, with reference coordinate information to generate coordinate correction data; and a first mounting inspection apparatus comparing a first measurement data obtained by measuring mounting state of a component when the component is mounted based on the coordination correction data through a component mounting apparatus, with the coordinate correction data to verify whether a component is mounted on a position corrected based on the coordinate correction data. In this manner, by adding the verification function for the performance function of the component mounting apparatus to the inspection apparatus, it is possible to monitor the operation state of the component mounting apparatus in each process step.

Abstract: A brazing system has a first gas source, a second gas source, an enclosure, a brazing torch, and a control system configured to control a ratio of the first gas source and the second gas source.

Abstract: An article, such as a hardfaced wearpart, includes a substrate, a sheet metal shell connected to the substrate to define a cavity between the surface of the substrate and the shell, and a composite material filling the cavity and forming a coating on at least a portion of the surface of the substrate, the composite material including a hard particulate material infiltrated with a metallic brazing material. The shell may be connected to the substrate by welding or brazing to the substrate, and may wear away during use. The shell and the substrate may be used as part of an assembly for producing the article, where the shell is used as a mold for forming the composite material by filling the shell with the hard particulate material and subsequently infiltrating with the brazing material.

Abstract: The invention relates to a molding mixture for producing casting molds for metalworking, a process for producing casting molds, casting molds obtained by the process and also their use. To produce the casting molds, a refractory mold raw material and a binder based on water glass are used. A proportion of a particulate metal oxide selected from the group consisting of silicon dioxide, aluminum oxide, titanium oxide and zinc oxide is added to the binder, particular preference being given to using synthetic amorphous silicon dioxide. The molding mixture contains a phosphate as essential constituent. The use of phosphate can improve the mechanical strength of casting molds at high thermal load.

Abstract: A system for enabling replacement of a properly aligned, full floating, tubular rear spindle on an existing truck and trailer axle for welding without machining. The improvement of this system uses a first alignment plate for positioning about and partially beyond the beveled cut edge of the truck trailer axle with a plurality of spaced outrigger assembly clamps and a plurality of hold down fixture clamps. It uses an improved rocket ship jig having a recessed inner plate for positioning over the plurality of axial spacer sleeves, at least one of said spacer sleeves including a brake bolt. The system (and related methods) enable better three-dimensional positioning and centering up of replacement parts before welding. New outriggers using studs and nuts enable tilt movements, both up-and-down and axial (in-and-out) movements before welding.

Abstract: The present invention relates to a conductive paste for bonding comprising 100 parts by weight of the metal powder, 5 to 20 parts by weight of a solvent, and 0.05 to 3 parts by weight of a polymer, wherein the polymer comprises a first polymer and a second polymer, wherein the molecular weight (Mw) of the first polymer is 5,000 to 95,000, and the molecular weight (Mw) of the second polymer is 100,000 to 300,000.

Abstract: A method of manufacturing includes depositing a first braze material to a first joint location between a first component having a first coefficient of thermal expansion and an intermediate component. The first component is fitted to the intermediate component at room temperature at the first joint location. A second braze material is deposited to a second joint location between the intermediate component and a second component having a second coefficient of thermal expansion. The second component is fitted to the intermediate component at room temperature at the second joint location. The intermediate component has a coefficient of thermal expansion between the first coefficient of thermal expansion and the second coefficient of thermal expansion.

Abstract: A rotating tool system attachment on the spindle of a computer numerical control (“CNC”) machine includes a rotating assembly mounted on a static assembly. The rotating assembly provides a continuous supply of a wire material for deposition on a substrate during an additive manufacturing process. The rotating assembly includes a material supply housing a feedstock of wire mounted on a rotating spindle and a wire feeder configured to draw the wire from the wire supply and provide the wire for application during the additive manufacturing process. The tool system can be attached to the spindle of CNC machine to provide additive manufacturing capabilities to the CNC machine.

Abstract: A pressure welding method and a pressure welding device (1) includes a plasticizing unit (7), a compression unit (8), a machine head (13) that includes a spindle (54) and a component holder (34). The pressure welding device (1) further includes a spindle drive (56) and an actuation mechanism (41) that includes an actuation drive (65) for the component holder (34). The actuation drive (65) is placed between the spindle drive (56) and the spindle (54) within a drive train (57).

Abstract: A method for the joining of ceramic pieces with a hermetically sealed joint comprising brazing a layer of joining material between the two pieces. The wetting and flow of the joining material is controlled by the selection of the joining material, the joining temperature, the joining atmosphere, and other factors. The ceramic pieces may be aluminum nitride and the pieces may be brazed with an aluminum alloy under controlled atmosphere. The joint material is adapted to later withstand both the environments within a process chamber during substrate processing, and the oxygenated atmosphere which may be seen within the shaft of a heater or electrostatic chuck.

Abstract: The present invention defines a tool including a heating device including a method and apparatus to allow the user to check whether, or be notified when, the soldered electronic component is completely removed from a substrate after the solder is sufficiently melted.

Abstract: The invention relates to ultrasonic welding tongs (10) for performing ultrasonic welding on a tubular electrically conductive welding medium (20), wherein a first welding jaw or a second welding jaw and a welding-medium stop device (21), which delimits a welding-medium holding space (19) formed between the welding jaws, are each electrically conductive and arranged electrically isolated from each other, the electrically conductive welding jaw and the electrically conductive welding-medium stop device forming components of a safety circuit in such a manner that a welding process including a closing of the welding jaws is triggered after the safety circuit has been closed by the formation of an electrical contact between the electrically conductive welding jaw and the welding-medium stop device by way of the welding medium.

Abstract: Embodiments of the present technology include clad materials. An example clad material includes a perforated structural substrate, a first ductile substrate roll bonded to the perforated structural substrate in such a way that the first ductile substrate at least partially fills the perforations, and a second ductile substrate roll bonded to the first ductile substrate.