Abstract: The present invention provides a method for joining two metal members into a joined metal member. The method comprise steps of; applying a brazing material having a higher melting point than both the members on the surface of a first metal member and heating them to form a brazing material on said surface and a braze-diffusion layer under the brazing material in the surface area of the first member; and, then, pressing the first and another second metal members between which the brazing material is interposed during heating at a higher temperature than said melting point of the brazing material to squeeze the molten brazing material out between both the contact surfaces of both the metal members, therefor the two metal members being joined by the braze diffusion layers formed in both the surfaces into the joined metal member.

Abstract: Stud welding device with an axially displaceable adjusting element (3, 17) for displacement from a front position into a rear position and back, in which a magnetic field and a coil (15) interact in such a way that, when the coil (15) is connected to a controllable current source (41) an axial force is produced in order to displace the adjusting element (3, 17), the movement of which is transmitted to a stud holder (2), characterized in that the coil (15) is rigidly arranged on a hollow body (14) which is connected to the adjusting element (3, 17) and is arranged axially movably in an air gap (13) between a magnetizable core (8) and a magnetizable sheath (10), the magnetic field being conveyed via at least one yoke (9) connecting the core (8) and the sheath (10) while passing radially through the coil (15), the coil exerting on the adjusting element (3, 17) an axial force acting only in one direction as a function of the direction of current during current control.

Abstract: Welding electrode holder comprising an electrically conducting body with positioning seats of electrodes and welding cable connection position, an insulating tubular handle where the back part of the body is encaged, a lever pivotably assembled with the body and having insulated lever arm, a compression spring seated on the electrode holder body or on the handle and pushing the lever arm thus forcing the lever to be turned and to exert force onto the positioning seats of electrodes, and an insulating head covering the parts of the body and those of the lever located in front of the handle or even covering and part of the handle and allowing the clamping of electrodes on the body. It is characterized in that the welding cable connection position is located outside the handle and inside the insulating head, behind or/and underneath the positioning seats of electrodes, and in that the rest electrode holder body, i.e.

Abstract: Welding device to enable a welder to maintain an upright position when welding at floor level. The device is a rigid handle having a pistol-type handgrip and telescoping tubes. The telescoping tubes can be easily adjusted and interlocked, thus providing a handle that is adjustable to a plurality of lengths. The handgrip is angled approximately 90° to the longitudinal axis of the handle and provides for a comfortable and secure grip. The electrode holder used in the welding process can be releasably attached to the distal end of the device. In the Preferred Embodiment, the telescoping tubes and handgrip are hollow, so that a power cable can be fed through the device and connected to the electrode holder. Mounted on the device is a welding shield made of welder's glass, that shields the welder's eyes from the welding flame and protects the welder from sparks arising from the welding site, thus eliminating the need on the part of the welder to wear a welding hood with mask.

Abstract: A command and control device for a coupling-welding machine for metal pipes within which the coupling-welding machine is positioned, the machine being movable within the pipe and being operable to weld the metal pipes together. The command and control device including a control unit associated with the machine, a command unit external to the pipe and an energy source connected to an external power supply by a power line, the control unit being cooperatively interconnected with command unit by the same power line.

Abstract: A method and apparatus for forming constricted ends on tube products on an automatic continuous basis. The apparatus includes a feeding station including a spindle for supporting a metallic tube. A forming station is positioned downstream from the feeding station and includes a carriage supported for movement on a frame. A forming tool and a cutting tool are supported in spaced relation on the carriage. A welding unit, preferably a tungsten inert gas welder, is provided including a tip supported for movement with the carriage. The carriage is operably connected to a drive mechanism for driving the carriage in movement relative to the spindle. A controller is in communication with the drive mechanism for controlling movement of the carriage and is in further communication with the heat source for controlling activation thereof. A discharge conduit is supported on the carriage for discharging a plurality of successive formed tubes into a receiving bin.

Abstract: When a projection nut is brought into an intended position, in order that welding may be completed with the nut kept at accurate posture and the nut fed in correct position, a recess (21) is formed at the leading end of a feed rod (20), the feed rod (20) is moved back in a direction almost orthogonal to the axial line of an electrode, and when the feed rod (20) is stopped, a guide pin (13) of an electrode (11) gets into a screw hole (26) of a projection nut (25), and then the feed rod (20) is restored to determine the position of the nut (25), then the other electrode (19) advances to complete the welding.

Abstract: A command and control device (1) for a coupling-welding machine (2) for metal pipes (3, 4) within which said machine is positioned, said machine (2) being movable within the pipe by drive means (5) and provided with welding means (6) for joining different pieces (3, 4) of said pipe together, the operation of said welding means (6) and drive means (5) being controlled by control means (12) associated with the machine (2) and connected to commanding means (9) external to the pipe. The operation of the machine (2) is controlled by a single microprocessor unit associated with the control means (12).

Abstract: A method and apparatus for producing an electrical bond between a conductor and an electrical connector contact. The apparatus generally comprises a power source and a weld head. The power source has a first polarity output and a second polarity output. The weld head has an input for connection to the first polarity output of the power source. The apparatus includes a first electrode electrically connected to the weld head input. The apparatus further includes a second electrode electrically connected to the second polarity output of the power source.

Abstract: A welding material supply mechanism for providing a welding bead on a surface comprising: a first hollow arm, a transfer tube, a second hollow arm, swivel bearing and a welding nozzle. The first hollow arm is connected to the second hollow arm by a swivel bearing, and a remote end of the second hollow arm supports a nozzle for facilitating welding on a surface. The swivel bearing facilitates pivoting movement of the second hollow arm relative to the first hollow arm to adjust a diameter of the welding bead to be formed on the surface, and a locking coupler facilitates locking the pivoted and adjusted position of the first hollow arm relative to the second hollow arm. The transfer tube is at least partially received within the first hollow arm and is concentric therewith. The transfer tube supports a female electrical connector coupled to the swivel bearing, the transfer tube establishes a welding electrical current path to the nozzle via the swivel bearing and the second hollow arm.

Abstract: An apparatus and method is provided for forming a punch retaining ball at the end of a wire to form a headed punch pin for making vias in greensheets comprising advancing the wire through a die, contacting the end of the wire with a movable electrode which forms the ball by completing an electrical circuit with the wire and the electrode, after which the wire is retracted so that the formed punch pin is restrained from movement by the die and is cut forming the punch pin. A formed punch pin collection device is also provided as is a defective punch pin removal device. After the formation and removal from the apparatus of a formed punch pin or a reject defective punch pin, the apparatus is moved to its starting position and again activated to advance the wire through the die and the above procedure repeated.

Abstract: A process, called Covered Trailing Edge of Weld (CTEW) that can be applied during fusion welding that produces a weld without cracks and porosity and reduced residual stress level, is described. The process eliminates or reduces the need of non-destructive testing, re-work and post weld heat treatments in weld manufacturing. It is known that in a normal unassisted solidification of a weld, numerous cooling gradients from solid-liquid interfaces come into effect, because of numerous and multi-directions of solid crystal faces that promote crystal growth in solidifying metal in different direction. Such micro cooling gradients in molten metal are in various directions also because of varying inclinations of the surface of the cup at each point where solid base of microstructure is exposed for crystal growth.

Abstract: The generator of an engine-driven welding machine is comprised of front and rear housings that attach directly to each other. The generator stator maybe secured solely to one or the other housing with preloaded screws. Alternately, one or more preload elements may be interposed between the stator and one of the front or rear generator housings. Thermal stresses are thereby avoided between the stator and the generator housings, despite the housings being made of aluminum and the stator being made of steel. The rear generator housing has an end wall that is mountable to different selected internal combustion engines by means of teardrop shaped clearance holes and machineable bosses. Slots for cooling air in the rear generator housing have sides with tangential components. Air leaves a fan in the generator with tangential components that are matched by the rear generator housing slots. The fan incorporates both fan blades and a baffle having a close clearance with an annular wall of the rear generator housing.

Abstract: A method of making a metal shape comprising the steps of supplying molten metal into a ceramic shell mould mounted in a container, spinning the container and the shell mould therein about an axis and permitting the metal to solidify in the shell mould and thereafter removing, for example by breaking, the shell mould to expose the metal shape. The ceramic shell moulds made by providing a pattern of flexible elastically deformable material of a required shape and supported on a mandrel, applying at least one coating of hardenable refractory material to said pattern to form a rigid shell and removing the mandrel from supporting relationship with the pattern and subsequently removing the pattern from the shell by elastically deforming the pattern. The pattern is made by moulding said material in a master mould of a required shape and removing the pattern from the master mould, after the pattern has set, by elastically deforming the pattern.

Abstract: Welding methods are provided for use in joining ultra-high strength, low alloy steels to produce weldments having tensile strengths greater than about 900 MPa (130 ksi) with weld metals having fracture toughness suitable for cryogenic applications according to known principles of fracture mechanics.

Abstract: A flash-butt welder having a stationary head 41 and a moving head 42, a pair of electrodes 45a, 45b, and 46a, 46b arranged to each of the stationary and moving heads, respectively, wherein power source transformers 12 through 16 are located at the stationary head 41 side, four bus bars 21 through 24 connecting the power source transformers 12 through 16 with the electrodes 45a, 45, 46a, and 46b are arranged at symmetrical positions surrounding a billet 10, while the bus bars, 22 and 24 as half of the number are connected to the electrodes 46a and 46b at the moving head 42 side.

Abstract: A supporting device for a station for welding tongs hung in an assembly/production liner, consisting of a bracket provided with at least one member for catching a pair of tongs and a system for balancing the tongs in a vertical position, the bracket being integral with a shank. The components and accessories of the station for welding tongs other than the welding tongs, such as the transformer, the switch cupboard, the fluid panel and the programmable control are fixed on the shank and/or the bracket. The bracket further has at its free end an arm supporting the system for catching and balancing the tongs and articulated on the bracket about an axis parallel to the shank. The device is applicable to stations for welding tongs.

Abstract: In a process for marking industrial products or parts, a plurality of spot welds serve as carriers of characterizing information, especially in encoded information. Information is encoded in said spot welds by varying the position of each weld relative to a reference position.

Abstract: A system and method for monitoring compression pressure, temperature, and alignment of first and second electrodes of a robotic welder. An apparatus is provided with hingedly connected, spaced apart top and bottom plates. An aperture is disposed in the top plate for receiving the first electrode therein and an aperture is disposed in the bottom plate for receiving the second electrode therein. Temperature sensors are mounted adjacent to the top and bottom plates for sensing temperature of the electrodes. A load cell is included in the apparatus for sensing pressure between the electrodes as well as a limit switch for indirectly sensing misalignment between the electrodes. A data processing unit is in electrical communication with the temperature sensors, load cell, and limit switch for performing software analysis.

Abstract: A liquid-cooled welding torch assembly for use in robotic welding that includes a body tube with a set of male connectors, the body tube guiding an electrode, and a flow of coolant to a welding tip. A supply cable adapter including a set of female connectors corresponding to the set of male connectors. At least one of the male connectors includes a rigid tube with a plurality of axially compressible and radially expandable sealing members coaxially and slidably disposed about the rigid tube, whereby the plurality of axially compressible and radially expandable sealing members expand to create a seal between the at least one of the male connectors and a corresponding one of the set of female connectors.