Abstract: The guide plates of a soldering apparatus for carrier strip are provided with grooves and slide bars that fit the grooves. The bars have pins fitting holes in the strip and means for precisely positioning the bars lengthwise in the grooves.

Abstract: The longitudinal edge portions of a cylindrical wheel rim blank are gripped by a pair of laterally spaced clamping assemblies each having a radially fixed inside clamping member and each having a radially movable outside clamping member adapted to clamp the blank against the inside member. After the rim blank has been clamped, the two clamping members of one of the clamping assemblies are pivoted laterally toward the clamping members of the other assembly to press the edges of the rim blank against one another preparatory to welding current being directed through the blank to weld the edges. A load cell detects the force applied to the pivoted clamping assembly and produces a signal which is used to monitor or control the force.

Abstract: An improved apparatus for producing welded metallic can bodies is provided. The apparatus has two roll-like revolving electrodes and an elongate electrode, and the lap portions of two can bodies are disposed respectively between the two revolving electrodes and the elongate electrode. An alternating current flowing through these lap portions is supplied by coupling the two revolving electrodes to an ac power supply, or by dividing the elongate electrode into two electrically insulated portions and coupling these portions to the power supply.

Abstract: For making defect-free welds for joining two austenitic stainless steel mers, using gas tungsten-arc welding, a thin foil-like iron member is placed between the two steel members to be joined, prior to making the weld, with the foil-like iron member having a higher melting point than the stainless steel members. When the weld is formed, there results a weld nugget comprising melted and then solidified portions of the joined members with small portions of the foil-like iron member projecting into the solidified weld nugget. The portions of the weld nugget proximate the small portions of the foil-like iron member which project into the weld nugget are relatively rich in iron. This causes these iron-rich nugget portions to display substantial delta ferrite during solidification of the weld nugget which eliminates weld defects which could otherwise occur.

Abstract: A method of attaching fine coil wire ends 22, 24 to terminal connectors 16, 18 wherein the terminals are rapidly heated into the red zone by common current flow therethrough from contact electrodes 26, 28 in the presence of a gaseous purge comprising a mixture of hydrogen balance argon, nitrogen, or helium while low melting temperature solder 84 is flowed onto the heated terminal for wire attachment. The gaseous purge from a nozzle 80 is maintained until the terminal has cooled sufficiently to prevent rapid atmosphere oxidation thereof.

Abstract: An apparatus is provided for forming a circular, honeycomb-type engine seal from pre-formed core strip having male and female nodes. The apparatus includes a source of strip and means for forming the strip into a circular seal configuration wherein the male and female nodes of the strip are automatically juxtaposed to each other for weldment as relative movement between the forming means and the source occurs to withdraw additional strip from the core strip source. As the relative movement continues, the juxtaposed male and female nodes are exposed to welding head means of the apparatus which welds the male and female nodes to one another. The forming means includes means for causing said relative movement constituted by drive means which is adjustable to permit forming means of different sizes to be utilized. The movement of the forming means permits successive layers or laminae of the strip to be welded to each other in circular form until a seal of the desired dimension is achieved.

Abstract: An apparatus for restoring the surfaces surrounding blind or through bores of metallic workpieces has a housing for an axially movable shaft which can be placed into axial alignment with the bore of a workpiece, a spindle which is rotatable in and is movable axially with the shaft, and several tool carriers each of which can be removably connected with the front end portion of the spindle. At least one of the carriers supports a welding nozzle which is surrounded by a nozzle for discharge of a protective gas and can be used to deposit fillets of molten welding wire along the surface or surfaces surrounding the bore. Another carrier supports a material removing tool which is used to remove the surplus of the fillet, and a third carrier is used when the restored surface is to be provided with a thread. The third carrier supports a thread cutting tool.

Abstract: The present invention is directed to a gun arm apparatus for a resistance welding gun. The gun arm apparatus comprises a main body having a U-shaped cross-section with an opening formed between the legs of the U. The main body is formed from a relatively thin metal and the main body includes an electrode holder at one end thereof, a support at the other end thereof and an electrical terminal at the other end thereof. An electrical conductor member is fixedly mounted in the opening between the legs of the U-shaped main body. The electrical conductor member is formed from a relatively thick plate member. The conductor connects the electrode holder to the electrical terminal. A cooling water passage is positioned in contact with the conductor for carrying cooling water to cool the electrical conductor member. In one embodiment, the cooling water passage comprises at least one pipe fixedly attached to the conductor and in another embodiment, the cooling passage comprises grooves formed in the conductor.

Abstract: An apparatus for welding connections of components, comprising a heating tube having an opening over the entire length of its upper generating line and having in its lower part a notch; a welding device disposed in the notch; and a device for advancing along the heating tube components mechanically held by conductive elements for forming the connections after welding. The heating tube is supplied by a low voltage generator.

Abstract: A process is described for preparing aluminum sheet for resistance welding, which increases the useful life of the welding electrodes used for welding the thus prepared sheet. The process comprises the steps of: (a) treating both surfaces of the sheet portion to be welded to remove the non-uniform mill finish oxide layer and provide clean surfaces, and (b) providing a thin oxide layer on one cleaned surface and a thicker oxide layer on the other cleaned surface of said sheet, thereby creating a differential in oxide thickness between the surfaces of the sheet and hence a differential in surface resistance.

Abstract: A welding electrode assembly includes an electrode holder having a "knock-out" cap electrode disposed to engage a workpiece during a resistance welding operation. The electrode holder is surrounded by electrical insulating material which in turn is covered by a wear resistant metal shield. Means are provided for cooling fluid to flow through the electrode holder close to the cap electrode.

Abstract: A gas shielded arc torch for welding or cutting having a torch head surrounding a collet assembly including a collet body and a slotted collet for gripping and positioning an electrode within the torch head and a torch cap for locking the collet within the collet body. The torch cap has a taper for engaging the unslotted end of the collet and the collet body has a taper for engaging the slotted end of the collet. The taper in the torch cap is substantially larger than the taper in the collet body.

Abstract: A device for welding together coaxial tube sections, comprising a cage adapted to surround the extremities of said tube sections, and provided with sleeves to be clamped on said tube sections for aligning the latter, guiding means for welding electrode carriers being connected to said sleeves which are adapted to guide welding electrodes and associated equipment along the welding seam to be formed between said tube sections.

Abstract: An electrical terminal having a wire clamping tab connected thereto by an essentially thin neck portion about which a wire coated with a resin-type, high temperature insulation is adapted to be wound so that, when the tab is bent back against the terminal by opposed, energized electrodes to clamp a portion of the wire extending from the neck portion therebetween, resistance of the latter to flow of current heats both the neck portion and the wire wrapped therearound sufficiently to explode the insulation from the wire to assure a good electrical connection. At the same time the relatively large area of the terminal and its clamping tab maintains the clamped portion of the wire below its annealing temperature so that it is resistant to breakage in use.

Abstract: A method and system of eliminating welding fumes by subjecting the air close to the welding point to a quiet electric discharge between an electrode supplied with a high voltage of direct current, and the work piece or another grounded object.

Abstract: A hot wire welding torch assembly includes a nonconsumable metal electrode 12, a filler metal 6 fed to a weld puddle 11 fomed by an arc 10, a collet body 15 for holding the electrode, a shielding gas nozzle 3, and a torch body 1 molded from a synthetic resin for coaxially mounting the collet body and shielding gas nozzle. A highly dielectric and heat-proof insulating bushing 14 is provided between the torch body and a clamping holder 2 for mounting the torch body 1 to a filler metal torch 4 to prevent any relative slippage between the two torches and avoid electrical shock hazards.

Abstract: Electric welding gun with a rotary torch head which with its auxiliary devices, is housed in an outer casing (1), on which a supporting casing (2) is constructed for handling the welding gun and into which are jointly introduced the supply lines for the torch head and the auxiliary devices. In the supply lines are provided liquid and gas lines issuing into ring chambers (43) axially sealed at either side and to which are connected line ducts (46) formed in the drive shaft (29), together with electrical lines connected to a current transfer mechanism for transferring the welding current to shaft (29). The current transfer mechanism is constructed as a contact brush (33) engaging on shaft (29) and the latter is made from a slip ring material. Each of the ring chambers (43) is axially constructed between retaining rings (44) arranged in pairs on a bush (47) fixed to shaft (29) and has holes (48) connecting the particular opening of the line ducts (46) in shaft (29) to the associated ring chamber (43).

Abstract: Welding apparatus embodies an electrode support and guide structure provided by a framework hingedly connected at opposite ends and supported generally midway of the ends by a swivel joint assembly rotatively mounted for swingable movement by one end of a hinged support arm connected at its opposite end to generally vertically disposed mounting structure. A plurality of pivotal connections are provided which permit an operator to move the electrode vertically, horizontally, and generally arcuately with respect to a workpiece being welded.

Abstract: A wire heating torch is mounted closely parallel to a TIG torch 1, and includes a slide base 28 having a vertically adjustable slide shaft 36 disposed therein. A rotatably adjustable slide member 27 is mounted to the lower end of the slide shaft, and carries an angularly disposed guide member 26 for directing the feed of an electrically heated welding wire 5. A conduit cable 44 for the torch includes an electrical power cable 45 and a wire feed liner 60 wrapped by a spring tube 50, both encased within a thermally shrinkable insulating tube 64 to form an integral assembly.

Abstract: A spot welding gun adapted for use in robotic welding in which the electrode holding arms of the gun are each turnably journalled on an attachment means. One of the electrode holding arms or an operating lever thereof supports a cam member with a cam surface thereon. A pressure roller acts against said cam surface during transport of the welding gun between welding points and thereby holds each electrode holding arm in a respective fixed position relative to the attachment means.