Abstract: A pipe welder for the automatic welding of joints between end abutting stationary sections of pipe which uses a welding head assembly mounted on a track which is mounted about the pipe. The welding head is low frictionally supported by a roller assembly connected between edges of the track. The track includes gear engaging slots. A drive gear is to engage with the gear engaging slots. The drive gear is flexibly mounted on the welding head housing so as to be continuously biased into positive engagement with the gear engaging slots.

Abstract: A honeycomb core manufacturing machine which includes a mainframe assembly and a transport assembly carried by and translatable along the mainframe assembly. The mainframe assembly comprises vertical and horizontal translatable upper and lower weld electrode assemblies. The transport assembly comprises upper and lower weld wheel electrode assemblies, an upper and lower weld electrode spreader assembly and a corrugated ribbon strip placement mechanism for placing ribbon between the spread apart upper and lower negative weld electrode assemblies with crest and trough of adjacent layers in registry.

Abstract: A shielding gas for use in electric arc welding is disclosed. The gas comprises a mixture of helium, argon, 1.75% to 2.25% carbon dioxide and 0.25% to 1.0% oxygen (by volume). Use of the gas enables slag-free welds which accept readily paint applied by an electrostatic deposition process.

Abstract: A burner for WIG-welding for a welding seam having a rod-shaped tungsten electrode with an electrode tip facing the welding seam, a welding wire guide and a protective-gas feed includes a coolant line connected to the electrode and formed of two adjacent channels extending as feed and discharge lines on mutually opposite sides of the electrode, the electrode tip projecting through a heat-resistant insulating cap overlapping ends of the coolant channels which face towards the electrode tip, and the protective-gas feed including protective-gas feed lines insulatedly fastened to a side of the coolant channels facing away from the electrode, the protective-gas feed lines having a region extending out of the insulating cap and formed with outlet openings directed towards the welding seam.

Abstract: A feeder for feeding alloy materials and electrode wire to a weld zone for deposition in desired amounts including a plurality of independent feeding elements, each feeding element controlled by its own independent control, the feeding elements powered by motors which are independent of the motor used to feed the electrode wire to the weld zone.

Abstract: For welding a grid formed by sets of plates disposed orthogonally and whose endmost parts are secured to a surround, it is placed in a shaping and mechanically holding frame allowing access to the point to be welded. The frame containing the grid is then placed on a revolving device belonging to a roundabout, at a first welding position and welding is carried out therein on at least one face of the grid by means of a welding member movable in two perpendicular directions for bringing it at right angles to each of the welding points on the face. The frame is then brought to a second welding position in which the plates are welded to the surround by means of a second welding member movable in only one direction, after rotation through 90.degree. of the frame by means of the revolving device; and the operations are repeated as necessary until the whole of the welds have been executed.

Abstract: Apparatus for welding studs utilizing a two-wire control is provided. The apparatus includes a stud welding tool capable of welding studs by a drawn-arc technique. A stud welding control circuit and a source of welding power are remotely located from the tool with the difference exceeding one hundred feet in some applications. Heretofore, two wires were required to connect the tool and the control circuit to initiate the welding cycle and two additional wires were required to control movement of the stud during the welding cycle independently of the position of a start switch on the tool after the switch is closed. The present apparatus requires only two wires to both initiate and control the weld cycle. This reduces costs and maintenance and increases reliability and maneuverability of the tool.

Abstract: A modular welding apparatus comprises a welding assembly having a welding head with an integral actuating assembly. A foot treadle initiates motion of the welding head. A conductive base member is spaced from the welding head. A welding power supply has one lead connected to the welding head and a second lead connected to the base member. An interchangeable welding module is disposed on the base member in electrical contact therewith. The welding module includes a conductive support plate and a locking cam for detachably attaching the support plate to the base member. Two movable, pre-aligned welding electrodes are disposed on the welding module. One of the welding electrodes is electrically connected to the base member and the other welding electrode is electrically connected to the welding head. At least one of the electrodes is in communication with the actuating assembly.

Abstract: A method which serves to bond electrically conductive wires by means of heating and of a soldering material; it is applicable in particular to wire segments of a hot wire fastened on wire holders for measuring the mass of a flowing medium, where the wire segments intersect one another and form a loop. In the method, in a first operation, the wire to be bonded is guided around the respective wire holder such that it forms a loop, and a soldering segment provided with a layer of soldering material comes to rest in the vicinity of the intersection point of the wire segments, in fact only at one of the wire segments.

Abstract: An electrode holder comprises an electrically insulating tubular handle having at one end an axially outward directed bearing surface. An electrode-clamping head member is rotatably seated on such bearing surface, and a cable connector is axially slidable in the tubular handle and has an axially-extending threaded pin portion screwed into a portion of the head member. A coil spring surrounds such pin portion and is arranged to retract the cable connector into the tubular handle so as to hold the head member against the bearing surface. A radially-effective pressure spring is arranged to act between one side of the cable connector and the inner wall of the tubular handle so as to press the other side of the cable connector against the inner wall of the tubular handle.

Abstract: The present invention is directed to an improvement for an apparatus which utilizes a preheating step in which the wire heat content of a consumable electrode is increased by means other than the welding current. Thus, the invention provides in combination with at least a first source of electrical power for heating a consumable electrode, a first electrode contact tip having a bore therethrough, a second electrode contact tip having a bore therethrough and a dielectric element having a bore therethrough disposed between the first and second electrode contact tips. The bores are adapted to receive therethrough the consumable electrode for the application of electrical power thereto. The bore of at least one of the electrode contact tips is axially displaced relative to the electrode contact bore of the other electrode contact tip. The invention provides several embodiments whereby either one of the electrode tip bores or the bores of both electrode contact tips are axially displaced.

Abstract: A solder application method and apparatus in which the solder element to be melted onto members to be electrically interconnected is the resistive heating element part of the solder heating circuit. A probe is provided for engagement with conductive metal associated with the area to be soldered and the solder to be melted onto the area to be soldered. This probe projects from the same housing to the area to be soldered and thereby establishes a heating circuit through the area to be soldered and through the solder. The melting of a predetermined length of solder and the dropping thereof onto the area to be soldered opens the circuit and terminates the soldering operation.

Abstract: A primary cable apparatus for a robot welding gun having a cable including a pair of conductors operatively connected to a welding power source, a grounding conductor, a shield wire surrounding the pair of conductors and the grounding conductor and an insulation coating operatively positioned around the shield wire. A first connector is operatively mounted on one end of the cable for connection to the welding power source and includes terminals connected to the conductors. A second connector is provided for detecting a disorder having a terminal operatively connected to the grounding conductor and a terminal connected to the shield wire for detecting damage to the insulation coating of the cable. A disorder detector is operatively connected to the terminals of the second connector and includes a circuit breaker interposed in a welding power circuit which is responsive to an output of the disorder detector.

Abstract: A method of electroslag welding consists in mounting parts to be welded with a required gap, assembling a forming device, introducing an electrode into the gap between the parts to be welded, filling the gap with a flux, setting a slag pool with subsequent melting of the electrode and the edges to be welded, and formation of the weld.A flux for electroslag welding contains calcium fluoride, calcium oxide. According to the invention, the flux further contains calcium chloride, the ratio between calcium fluoride and calcium oxide being of 3:1.

Abstract: A method of replacing a defective circumferential butt joint in a metal pipe is disclosed. An annular metal bridge ring, having a smaller wall thickness than the pipe but the same inside diameter, is positioned coaxial with the pipe in the relatively wide gap created by the removal of the defective joint. The ring becomes an integral part of the weld by being welded in place, thereby partially filling the gap between the edge surfaces of the pipe exposed by the removal of the defective joint. Subsequent layers of fusible material are weld deposited in place on top of the ring until the gap is filled to the exterior pipe surface. Use of the ring in the gap enables replacement of the defective joint with a single weld.

Abstract: A method of brazing comprises sand blasting the surfaces of the components to be brazed with particles of a brazing material to clean the surfaces and to embed brazing material in the surfaces, applying the brazing material to the surfaces, and heating the brazing material to form a brazement between the components.

Abstract: A welding machine includes a main housing with head stock and tail stock sections at its opposite ends having respective chucks for supporting a rotating work piece. A carriage movable endwise between the head stock and tail stock sections includes a head overlying the work area and a flux collection tray and associated circulation components underlying the carriage head and the work area. A welding torch assembly is supported in suspended adjustable relation from the carriage head and includes a welding tip through which weld wire is fed and a dispensing nozzle surrounding and concentric with the welding tip for dispensing granulated flux. Granulated flux is supplied by gravity from a hopper in the carriage head; and the flux is circulated from the hopper box under the collection tray to the overhead flux hopper by a pneumatic circulating system.

Abstract: A band welding installation includes a welding machine having a control device and a welding torch for joining ends of pieces in a band processing line transverse to the direction of the band run. At least two sensor units are coupled ahead of the torch for determining the seam beginning and end, and for guiding the torch along the joint center, as well as controlling the torch angle of inclination for different band thicknesses.

Abstract: An apparatus for welding studs to a workpiece includes a stud supporting and positioning unit adapted for cooperation with a guide template to provide for accurate positioning of a stud to be welded. The unit includes a centrally located electrode provided with a stud positioning bore and a detent for releasably supporting a stud within such bore; a casing or housing supported on and electrically insulated from the electrode; and a plurality of stud guide pins, which are arranged parallel to the stud positioning bore and supported for axially directed reciprocating movements under the control of spring devices between an extended, guide position and a retracted, stud welding position. The pins cooperate with guide holes provided in the template to accurately locate the stud to be welded. The method involves the mode of forming the template and cooperation of the positioning unit therewith to achieve accurate positioning of a stud.

Abstract: A wire bonder useful for assembling electronic components with fine metallic wire. The wire bonder in accordance with this invention forms a ball at a free end of a bonding wire by utilizing discharge arc and thereafter bonds this ball to a component. The wire bonder of the invention has a construction in which the atmosphere between the tip of the bonding wire and a discharge electrode disposed adjacent the tip of the bonding wire can be maintained as a reducing gas atmosphere. Especially when an aluminum wire, which is an easily oxidizable thin metallic wire, is used as the bonding wire, the wire bonder of the present invention improves the sphericity of the ball formed by discharge arc as well as the bondability.