Abstract: In a welding procedure for joining of adjacent, possibly partially enclosed metal components, such as pipe sections, wherein the welding procedure can be of a gas tungsten arc type such as a heli-arc type, or similar process, and wherein oxidation of metal frequently occurs within the components at the joinder point due to presence of oxygen in the region of weld during the welding procedure; introducing under pressure and at least initially pressure blowing, at a relatively high pressure, an inert gas into the interior of the components in a substantial swirling and interior surface wiping motion. The inert gas is blown through the components, from the entry end, beyond the weld region to rapidly, and substantially completely remove from the interior and weld region, any oxygen or other possible deleterious gas or material. Subsequently a lower pressure introduction of gas will serve to maintain the interior free of oxygen and the like.

Abstract: In a link forming apparatus, U-shaped links are fed into a forming station and closed by a forming anvil. Opposing electrodes are then pressed against each side of the closed link by means of a common belt drive which is in turn pneumatically driven. Each electrode is spring biased with respect to a carrier so that a predetermined spring force is applied to the link by the electrode during the welding operation. The first electrode to contact the link and apply a predetermined pressure triggers the welding current.

Abstract: A fusing machine utilizes a fusing electrode assembly and a ground electrode assembly suspended from the fusing electrode assembly. The fusing electrode assembly includes a lower fusing electrode shaft and an upper fusing electrode shaft. The lower fusing electrode shaft has an open end adapted to receive the upper fusing electrode shaft and a compression spring interposed between the shafts. An adjustable stop is threaded onto the upper fusing electrode shaft to limit the downward movement of the upper fusing electrode shaft. The lower fusing electrode shaft is keyed to a fusing electrode holder formed from a plurality of keyed members. The ground electrode assembly includes an adjusting mechanism, whereby the position of a ground electrode carried by the ground electrode assembly can be adjusted relative to a fusing electrode carried by the fusing electrode assembly. The fusing electrode assembly and the ground electrode assembly are mounted to a frame which is adjustably attached to a supporting structure.

Abstract: A method of fabricating a truss core sandwich panel of the type including first and second face sheets secured on opposite sides of a corrugated sheet. The first face sheet is welded to one side of the corrugated sheet and the second face sheet is positioned in contact with the other side of the corrugated sheet. A conductive mandrel is positioned between the first face sheet and the corrugated sheet, the height of the mandrel being less than the distance between the first face sheet and the corrugated sheet by a predetermined amount. The first and second face sheets are positioned between opposed welding electrodes, with the mandrel being coplanar with the electrodes. A welding force is applied to the first and second face sheets by means of the electrodes, the force being sufficient to deflect the first face sheet into contact with the mandrel and to bring the mandrel into contact with the corrugated sheet to permit electrical continuity between the electrodes.

Abstract: In a tubular composite electrode for depositing stainless steel or nickel-base alloy weld metal, satisfactory performance in vertical up welding is achieved through the inclusion in the electrode core of a slag mix comprising 15 to 60% weight percent zirconium dioxide.

Abstract: An arc welding process is provided with a preheating step in which a consumable wire electrode is heated prior to insertion into the electrode stick-out region. This is accomplished by the circulation of current from a preheating power supply through a segment of the wire. Both gas-metal and gas-tungsten arc welding processes are disclosed, along with apparatus used in these processes.

Abstract: Two coaxially aligned workpieces of ferromagnetic material, axially separated by a narrow peripheral gap across which a weld seam is to be formed with the aid of an arc moving along that gap, are engaged by holders including at least one set of two or more ferromagnetic gripper jaws whose confronting faces are magnetized with like polarity by respective excitation windings surrounding extensions of these jaws. The resulting magnetic field extends axially within the workpiece held by the gripper jaws in a loop which passes generally radially through the peripheral gap, either on account of a bucking magnetic field (which may be generated by a similar set of jaws gripping the other workpiece) or by virtue of pole shoes of the opposite polarity juxtaposed with the jaw extensions and approaching the gap.

Abstract: A device for feeding welding wire in a submerged arc welding operation in which there is a narrow gap between workpieces which are to be welded together comprises a guide support having a plurality of spaced apart welding wire straightening roller assemblies mounted thereon which are in a position at selected angles relative to each other around and in engagement with the welding wire and which define a feed guide path for the passage of the welding wire between the rollers of each assembly. A welding head is pivotally mounted on a support for pivotal movement transverse to the welding direction and the head includes a welding guide and a carrying guide which together define tongs of the head which are mounted on the support for pivotal movement toward and away from each other. Tongs carry a plurality of guide shoes which define a continuing guide path for the welding wire received from the welding wire feed guide and deliver it to the welding zone between the workpieces.

Abstract: A car body side aperture assembly system for welding together multiple component parts of side apertures for different vehicle bodies at successive framing and respot welding stations. Overhead conveyor carriers each with laterally spaced racks for supporting loosely mounted component parts for left and right side apertures move into station position over selectively positioned framing station fixtures for accurately locating the component parts in required relation. Programmable robot welders produce different pretack welds at successive framing stations as well as respot welds at intermediate stations as required for different side apertures. The system includes means for selectively shuttling framing station pallets each with outwardly expandable fixtures having tooling for locating the multiple component parts of a particular side aperture at each framing station.

Abstract: A tool holder for a manipulator comprises a tool shaft extending along and rotatable about a main axis and having a tool-shaft end provided with a pivot defining a transverse axis. A tool is carried on the pivot and is displaceable relative to the tool shaft about the transverse axis. A stack of guide rings coaxially surrounds the tool shaft adjacent the pivot and is formed with at least two throughgoing guide-ring passages each having a radially outwardly opening passage end. Two of the guide rings define a pair of axially spaced annular confronting guide-ring surfaces. A connector ring is rotatable on the stack between the guide-ring surfaces and has a pair of axially oppositely directed connector-ring surfaces one of which axially directly confronts one of the guide-ring surfaces. A connector element secures the connector ring to the tool-shaft end for joint rotation of same about the main axis.

Abstract: A method for electroslag welding of metals by a large-section electrode includes establishing a slag bath, fusing the electrode and the edges being weld-joined, filling with molten metal the inlet metal mould and the gap between the edges, and subsequently removing the inlet shrinkhead. The electrode is, in establishing the slag bath and filling with metal the inlet metal mould, fused at a rate lower than the electrode fusion rate in filling with metal the gap between the edges being weld-joined at constant electrical parameters of the electroslag welding. A brittle interlayer is formed between the inlet shrinkhead and the weld in the course of welding, and the weld is made so that it has a low electrical resistance.

Abstract: A pipe resistance butt welding apparatus comprises a body with an elongated arrying member and two internal expanding clamps including current-feeding shoes. One of the clamps is rigidly attached to the body, whereas the other is movably mounted on the elongated carrying member and connected with a drive intended to communicate reciprocating motion to the other clamp. A trimming mechanism for removing flash is mounted on at least one of the internal expanding clamps. The body of the apparatus mounts centering supporting rollers and driving wheels, the former and the latter being secured thereto by means of spring-loaded levers. The driving wheels are connected with a rotation drive intended to rotate the wheels. The body carries a powder cylinder and spring-loaded three-arm rockers, the latter being turnably mounted. The first arm of each of said three-arm rockers carries a driving wheel, the second arm carries an additional supporting roller, and the third arm is connected with a rod of the power cylinder.

Abstract: An elongated hollow housing is attached to an inert gas arc welding torch in a position extending rearwardly of the electrode parallel to and trailing the direction of movement of the torch during welding, and a source of inert gas is coupled to the interior of the housing. The housing serves to distribute inert gas over a sufficient length of produced weld extending from and trailing the puddle of molten metal that said length of weld is protected with inert gas until it is cooled to a temperature at which is not adversely affected by atmospheric oxygen and nitrogen. The housing may be completely open at its side facing the work to be welded, or said side may be formed as a perforated wall. Also, said side may be contoured to substantially match the contour of the work to be welded.

Abstract: An apparatus for applying a band of hardened metal around a portion of a drill collar in accordance with conventional MIG or TIG welding processes. The improved hardbanding system comprises an AC power source coupled to a water cooled, MIG or TIG welding torch assembly. A hydraulic pump is provided, coupled to the AC power source, for independently driving: (1) a mandril assembly for rotating the drill collar workpiece adjacent the torch assembly, (2) an elevation assembly for adjusting the height of the torch assembly and the mandril assembly; and (3) a pair of hydraulic jacks for lifting the drill collars off of standard pipe racks. The entire system is designed for mounting on the bed of a conventional two ton truck such that the system is easily transportable for on-site hardbanding.

Abstract: A method for electroslag welding of railroad rails under field conditions employs a special mold bottom member and a special guide tube structure. The mold bottom member includes a metallic insert which is supported by heat-insulating means, e.g. ceramic material in a cavity in a bottom copper block. The ceramic effectively heat insulates the insert from the copper block so when arcing takes place at the start of the welding, the heat is retained by the insert, which forms part of the weld. The guide tube structure is flared toward the bottom and guides two continuously fed electrodes. The structure includes wing-like members near its bottom end. The bottom of the structure is designed wth sharp corners, so that when arcing takes place some of the guide structure metal melts to form a uniform layer of molten metal, which aids in the melting of flux into a slug bath of uniformly distributed temperature.

Abstract: The present invention provides a novel electrode construction, for use in extrusion-fusion type battery intercell welders, which uniformly controls the area of contact between members to be welded at the completion of the extrusion process in order to produce consistent, high-quality welds exhibiting higher strength and superior durability.

Abstract: Method and system for collecting fume and/or waste particulate matter generated in a process used to surface treat, cut, gouge or join a workpiece by means of elevated temperature (e.g. electric arc).The system includes means to collect and quench the effluent (slag and/or fume) in a cooled nozzle coupled with means to separate solid particles and cooling fluid, in the case of a working environment including air and return cleansed air to the ambient environment.

Abstract: An apparatus and method for controlling cooking in a microwave oven whereby the power input to the cooking cavity is held at a predetermined, constant level. Available line power is measured through a winding or tap on the high voltage transformer secondary and the duty cycle of the magnetron power supply is adjusted to maintain a constant average power output.

Abstract: An apparatus for safeguarding a welding pool in mechanized welding in a constrained position, for example a vertical position, comprises sliding blocks pressed against the surfaces of the work pieces to be welded and supplying the welding current and the welding electrode and moving at the welding rate. The sliding blocks comprise two segments which are closely adjacent in the perpendicular center plane of the welding gap between the work pieces and are mutually movable. The sliding block segments are pressed in a yielding manner against the surface of each work piece and are individually and independently movable.

Abstract: Welding apparatus for a motorcar body comprising a pair of welding jig units positioned on opposing sides of a combining station which are movable laterally for positioning and holding thereon side panels of the body and a carrier movable between the combining station and a setting station for positioning and holding thereon the floor panel and the roof panel of the motorcar body. The structures of the carrier and the welding jig units are disclosed. Each welding jig unit can be turnable between an inwardly facing position and an outwardly facing one.