Abstract: A TIG welding method for a ferrite stainless steel sheet is disclosed, wherein a first shield gas is used wherein the gas is a mixture of argon gas and helium gas, 20 to 90% by volume of helium is included in the mixture, and the flow rate S1 of the first shield gas is set in a range of 0.175 m/sec?S1?1.75 m/sec, and a second shield gas is used wherein the gas is argon gas, and the flow rate S2 of the second shield gas is set in a range of 0.05 m/sec?S2?1.51 m/sec.

Abstract: A method and apparatus for microplasma spray coating a portion of a substrate, such as a gas turbine compressor blade, without masking any portions thereof. The apparatus includes a microplasma gun with an anode, cathode, and an arc generator for generating an electric arc between the anode and cathode. An arc gas emitter injects inert gas through the electric arc. The electric arc is operable for ionizing the gas to create a plasma gas stream. A powder injector injects powdered material into a plasma stream. A localized area of the compressor blade is coated with the powdered material without having to mask the compressor blade.

Abstract: An underwater welding apparatus includes: an underwater welding head provided underwater and having, at its leading end, a nozzle section from which laser light is emitted; a shied cover formed of an elastic member and provided around the nozzle section so as to form, at the leading end of the underwater welding head, a space where water is excluded by shield gas; and an expansion/contraction member having a discharge hole for discharging water and shield gas containing metal dust particles from an inside of the shield cover, the discharge hole being increased in diameter as pressure inside the shield cover rises, while being reduced in diameter as the pressure inside the shield cover falls.

Abstract: It is an improved alternative device for welding, comprised of a stainless steel attachment for a cordless motorized driver, with optional extended accessory for greater adjustability. The driver includes a grooved rubber roller, whose rotation feeds a rod in a forward or backward motion, controlled by pressing the corresponding starter buttons for the driver's motor. The attachment is composed of a support ring bracket, connecting a fixed track, and adjustable track. The latter can be adjusted as desired, with the former used as support for stabilizing the rod as it is fed. The driver is designed to comfortably fit an adult hand, and power the feeding process by rotating the driver shaft, on which the rubber roller is fixed. It is an improvement for its ease of use, eliminating the restricted entry in the field, by allowing beginners to safely and efficiently weld.

Abstract: A method for joint-welding coated metal sheets in a butt joint. At least one pulverulent welding additive in the form of a gas-powder flow is added to the weld melt via at least one flow duct such that the gas-powder flow leaving the flow duct is directed towards the weld melt at a speed of at least 2 m/s, such that the welding additive mixes turbulently with the weld melt and flow eddies form in the weld melt. A device including at least one welding head for producing and/or focussing an energy beam and at least one flow duct for supplying gas-powder flow, the flow duct having a longitudinal axis, the longitudinal axis and the beam axis of the energy beam being at an angle between 15 and 75 degrees. The flow duct is adapted to set the gas powder flow to a speed of at least 2 m/s.

Abstract: For a WIG/TIG welding torch, gas distribution across a cross-section of the gas lens and/or the gas nozzle, is improved and as small a size and as low a weight of the components as possible can be achieved, when an insertion element with a bore in the center through which an electrode is to be guided is arranged, with fan-shaped flow elements being positioned around the bore and twisted relative to the plane of the bore so as to provide for radial deviation of a gas flowing therethrough. The gas lens consists of a base body having a gas distribution channel with at least one gas-lens filter, with an above-described insertion element being arranged in the gas-distribution channel, and with a gas-lens filter, seen in the out-flow direction of the gas, being arranged downstream of the insertion element.

Abstract: Approaches to a solder ball bonding (SBB) tool and a method for solder ball bonding work pieces. The SBB tool comprises a rotatable feed plate for transporting solder balls from a reservoir to a nozzle, which is a position at which a laser light source can irradiate and melt the solder balls. The melted solder ball is then ejected from the nozzle and onto one or more work pieces, for electrically interconnecting the work pieces. The feed plate is configured with first holes and second holes, the first holes for receiving and transporting solder balls and the second holes for providing an aperture for the laser light to irradiate the solder balls, as the feed plate rotates and the holes are moved to positions in relation to the reservoir and the nozzle.

Abstract: The invention relates to a welding head for a welding device for welding components which are not rotationally symmetrical onto workpieces such as for example metal sheets, with a head attachment, the head attachment having a holding device for the component and being designed for carrying a welding current to the component, wherein the holding device is mechanically connected by means of a connecting device to an interface device, via which the welding current can be supplied, the connecting device being subdivided into a first connection piece and a second connection piece, which are electrically insulated from each other.

Abstract: A robotic welding cable for a welding torch includes a flexible hose defining a hollow core for passage of welding wire and shielding gas. Conductor strands are arranged around the flexible hose. A composite layered covering includes electrical insulation that covers the conductor strands and an outer jacket that surrounds the electrical insulation. The electrical insulation is formed of an Ethylene Propylene Diene Monomer (EPDM) synthetic rubber, and the outer jacket is formed of a Chlorinated Polyethylene (CPE) synthetic rubber.

Abstract: A method for hard surface deposition on aluminium metal parts of a turbine engine using MIG welding equipment which includes a pulsed current generator and pulsed filler metal wire feed, wherein the deposition is achieved using a filler metal wire whose composition is of the same nature as the composition of the aluminium alloy of the part to undergo hard surface deposition, with the pulsed metal wire feed and speed of deposition on the metal part of the turbine engine being adapted to carry out deposition without hot fissuring.

Abstract: There is provided a contact device (10) for application to an opposing surface (46;50) in use. The contact device comprises a support (12) and a plurality of contact members (14) aligned along the support. Each contact member has an end portion (15) spaced from the support and is independently resiliently mounted to the support such that the end portions (15) can conform to the opposing surface (46;50) in use and thereby provide a seal there-against. The contact members and/or support and may be planar in form and may be cut from a sheet metal material. The contact device may serve as a gas shield or a support jig or clamp device.

Abstract: Disclosed is a method for hybrid welding in which a laser beam is applied to the welding position of objects to be welded, and at the same time, a first wire is fed to the welding position so as to perform arc welding using an arc generated between the objects to be welded and the first wire. In this method, one or more second wires are fed to a molten weld pool formed by the laser beam and arc welding, thereby increasing the amount of welding without increasing the arc current.

Abstract: The invention pertains to a method for arc welding with a consumable electrode and with high deposition rates, wherein an alternating current is applied between the electrode and a work piece in order to generate the arc, wherein the alternating current has a current waveform that repeats itself after one period, and wherein the current waveform has at least one positive phase that is divided into at least one positive high-current phase and into at least one positive basic current phase and at least one negative phase within one period. According to the invention, the positive basic current phase is applied within the period after the positive high-current phase and a diffuse arc burns in the negative phase. In this case, it needs to be observed that the positive basic current phase is sufficiently long.

Abstract: A method of welding surface-treated members together using a welding wire includes a step of transferring a droplet detached from the wire to the members and a step of pushing the melt pool in the direction opposite to the direction of welding in such a manner that the gas generated from the members during welding is released from the site of generation. The melt pool is pushed to expose the overlapped region of these members. The gas generated from the members is released to the exposed portion, preventing generation of pores such as blowholes, and also generation of spatters.

Abstract: The present invention relates to a manufacturing method for advanced high-strength steel (AHSS) wheel, comprising the following steps. Take an AHSS with at least 590 MPa of tensile strength for rolling to circular ring of a rim. Apply low heat input welding, such as the cold metal transfer (CMT) welding or the gas tungsten arc welding/tungsten inert gas arc welding (GTAW/TIG), at the junction of the rim to form a hollow cylindrical rim. Then perform hole expanding and spinning/roll forming operations to the rim. Take another AHSS with at least 980 MPa of tensile strength for pressing and forming a disk. Apply low heat input welding, such as cold metal transfer (CMT) welding, to the rim and the disk to produce a wheel. According to the present invention, the welding quality of products can be improved significantly; the fatigue lifetime of wheels can be enhanced; and wheels are lightweight.

Abstract: The plasma spraying apparatus includes a cathode, a first gas nozzle defining a first gas path between the cathode and itself, a second gas nozzle defining a second gas path between the first gas nozzle and itself, and a third gas nozzle disposed between the first and second gas nozzles to define a third gas path between the first and second gas paths. A wire is disposed at a distal end thereof in front of a nozzle opening of the second gas nozzle. A first gas sprayed through the first gas nozzle is turned into plasma flame, which melts the wire into droplets, and the droplets are sprayed onto a target by a second gas sprayed through the second gas nozzle. The third gas absorbs heat from the plasma flame to thereby turn into a high-temperature gas flow externally of the plasma flame.

Abstract: A self-adjusting wire feeder mounting assembly includes a mount fixedly connectable to a multi-axis robotic arm, and a slidable, floating adapter plate for mounting of a wire feeder thereon. The adapter plate is coupled with and slidable about the mount, and the adapter plate is moveable relative to the mount when a force is applied to the wire feeder.

Abstract: A tray system is designed to be affixed in a stationary position to a housing of a welding-type system to support a gas cylinder for use with the welding-type system. The tray includes a base extending from the housing to form an interior and a periphery. As such, the interior forms a platform configured to support the gas cylinder proximate to the housing. The tray also includes a wall extending up from the base along at least a portion of the periphery of the base to form a barrier along the portion of the periphery that restricts the gas cylinder from being removed from the base. A lifting tab is included that extends up from the base proximate to the wall to form a pivot axis for the gas cylinder against which the gas cylinder may be tilted and rotated to raise the gas cylinder onto the wall and remove the gas cylinder from the tray without manual lifting.

Abstract: A device includes a tube extending in a longitudinal direction and a hollow channel arranged in the tube. An end part of the tube is formed such that first electromagnetic radiation paths extending in the tube and outside of the hollow channel in the longitudinal direction are focused in a first focus.

Abstract: Provided with a wire bonding apparatus capable of preventing oxidation of a surface of a free air ball. The apparatus is provided with: a capillary for bonding a wire to each electrode; a horizontal plate provided with a through hole allowing a tip of the capillary to be inserted and removed; and a first and a second antioxidant gas flow channel for allowing an antioxidant gas to be blown to a center of the through hole along an upper surface of the horizontal plate, the gas from the second channel being blown in a direction substantially intersecting with a direction in which the first channel extends. The horizontal plate is configured such that the antioxidant gas on the upper surface of the horizontal plate is allowed to flow outside the horizontal plate from its edges, where no antioxidant gas flow channel is disposed.

Abstract: A plasma gun with two gap electrodes on opposite ends of a chamber of ablative material such as an ablative polymer. The gun ejects an ablative plasma at supersonic speed. A divergent nozzle spreads the plasma jet to fill a gap between electrodes of a main arc device, such as an arc crowbar or a high voltage power switch. The plasma triggers the main arc device by lowering the impedance of the main arc gap via the ablative plasma to provide a conductive path between the main electrodes. This provides faster triggering and requires less trigger energy than previous arc triggers. It also provides a more conductive initial main arc than previously possible. The initial properties of the main arc are controllable by the plasma properties, which are in turn controllable by design parameters of the ablative plasma gun.

Abstract: A welding system including a welding power source including power conversion circuitry adapted to receive primary power and to convert the primary power to a weld power output for use in a welding operation and a controller communicatively coupled to the welding power source are provided. The controller is adapted to determine a statistical signature of at least one parameter of a welding process and to utilize the statistical signature to determine at least one of an electrode type, an electrode diameter, and a shielding gas type during the welding operation.

Abstract: A component repair arrangement includes a material depositing electrospark rod configured to deposit a material onto the component. Also included is a first routing hose for flowing a first shielding gas to a location proximate a tip of the material depositing electrospark rod, the first shielding gas removing a plurality of sparks generated proximate the tip.

Abstract: The invention discloses a method to determine the weld joint penetration from arc voltage measurements in gas tungsten arc welding (GTAW). It is based on an observation on the dynamic weld pool surface in GTAW—the surface tends to first expand toward the electrode and then be pushed away from the electrode after full penetration is established. For the pool surface in GTAW, localized partial keyholes around the arc axis as in plasma are welding are not significant. The pool surface is relatively smooth. The arc voltage that reflects changes in the arc length thus first tends to reduce and then increases after full penetration is established. This invention thus tracks the arc voltage until the decrease slope becomes insignificant. Once full penetration is established, the current is reduced to decrease the weld penetration or first decrease the penetration growth for a certain period and then decrease the weld penetration.

Abstract: The invention described herein generally pertains to a method for improved droplet detachment detection in a welding process in which a derivative of at least one welding parameter over time is used to detect droplet detachment from the wire during a welding operation based identification of a peak signature.

Abstract: The invention described herein generally pertains to a system and method for a voltage sense lead being disposed on or within a welder gun in a hot wire application (e.g., hot wire laser, hot wire hybrid, and the like) to monitor voltage across the electrode. In this manner, resistive heating can be regulated to ensure that the wire and weld pool (e.g., puddle) temperature are within a desired range. The voltage sense lead can be incorporated into a welder gun or onto a welder gun in order to mitigate inaccuracies and voltage drops resultant of a cable connecting the welder gun to the wire feeder of a hot wire system.

Abstract: Systems and methods to affect heat input to a weld and, therefore, an appearance of a deposited weld bead by modulating a mixing ratio of shielding gases and/or one or more welding parameters. For example, a mixing ratio of two different shielding gases from two sources of shielding gases may be modulated to affect the appearance of a deposited weld bead. The modulation frequency may be based on a selected travel speed of a welding tool. Furthermore, a wire feed speed of a welding electrode may be synergistically modulated with the shielding gases to affect a deposited weld bead appearance. Other welding parameters may be synergistically modulated with the shielding gases to affect a deposited weld bead appearance.

Abstract: An atmospheric shield for isolating a component from an external atmosphere is provided. The atmospheric shield includes an envelope and a base carrying a continuous channel. The base and the envelope are arranged to define an enclosure within which the component to be isolated is located, and such that a portion of the envelope extends within the continuous channel. A seal is provided within the continuous channel to seal between the envelope and the base.

Abstract: The present invention relates to dispersion strengthened platinum-base alloys, and more particularly to a method for welding of these alloys and is based on the object of providing an improved process for connecting oxide-dispersed precious metal sheets and a device for carrying out this process.

Abstract: A cored electrode having reduced moisture pick-up properties and which forms a weld bead with low diffusible hydrogen in a gas shielded electric arc welding process. The cored electrode includes a metal sheath and a fill composition. The fill composition includes titanium dioxide, slag forming agent and a sodium-silica-titanate compound.

Abstract: A process for cladding a surface of a substrate that includes cleaning the surface just prior to applying the cladding. Oxides, such as base metal oxides, are removed from the surface during the step of cleaning. Cleaning methods include an ionized gas cleaning process that may include forming an arc between an electrode and the surface. Optionally, the step of cleaning can occur in a chamber that is substantially evacuated. The cladding can be applied to the cleaned surface immediately after it has been cleaned.

Abstract: A welding device for powder welding is described, which comprises a welding head for transportation of at least one welding electrode to a welding area, and a powder transportation device for transportation of powder from a container to the welding area. The powder transportation device comprises at least a first pipe which at a first end has an opening which is arranged to be placed in the container in order to transport fluxing agent from the container. The powder transportation device comprises at least a first ejector which is connected to the second end of the first pipe and which is arranged to transport powder from the container via the first pipe using pressurized gas.

Abstract: The invention concerns a MIG/MAG-type electric arc welding method that uses a consumable filler wire and gas protection formed by a ternary gaseous mixture comprising 19 to 21% helium, 0.8 to 1.2% CO2 and argon for the remainder (% of volume), in order to weld one or more pieces of stainless steel. According to the invention, the arc is rotary, the consumable filler wire is melted by the arc such as to transfer metal by means of a rotating liquid flow, and the welded parts comprise overlapping ends.

Abstract: A method and apparatus for improving the flow control of a shielding gas in a welding unit is described which uses feedback from at least one of a mass flow controller, a pressure sensor and a valve position sensor to regulate shielding gas flow through a controller.

Abstract: A process of fabricating a shield, a process of preparing a component, and an erosion shield are disclosed. The process of fabricating the shield includes forming a near-net shape shield. The near-net shape shield includes a nickel-based layer and an erosion-resistant alloy layer. The nickel-based layer is configured to facilitate secure attachment of the near-net shaped to a component. The process of preparing the component includes securing a near-net shape shield to a substrate of a component.

Abstract: The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core. The tubular welding wire is configured to form a weld deposit on a structural steel workpiece, wherein the weld deposit includes less than approximately 2.5% manganese by weight.

Abstract: The invention described herein generally pertains to a system and method for generating a negative polarity welding output current waveform to control a welding process. An electric arc welding system generates an electric welding waveform with portions in a negative polarity. A cycle of the electric welding waveform includes a background current phase, a short clearing ramp phase after the background current phase, a peak current phase, and a tail-out current phase of the electric welding waveform, wherein the peak current phase provides a negative peak current level, the tail-out current phase provides a monotonically increasing tail-out current level toward the positive background current level, and the short clearing ramp phase provides a decreasing current level in a positive polarity of current for the electric welding waveform.

Abstract: A system for manufacturing an airfoil includes a laser beam and a first fluid column surrounding the laser beam to create a confined laser beam directed at the airfoil. A gas flowing inside the airfoil disrupts the first fluid column inside the airfoil. A method for manufacturing an airfoil includes confining a laser beam inside a first fluid column to create a confined laser beam and directing the confined laser beam at a surface of the airfoil. The method further includes creating a hole through the surface of the airfoil with the confined laser beam, flowing a gas inside the airfoil, and disrupting the first fluid column with the gas flowing inside the airfoil.

Abstract: The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core, and the core includes an organic stabilizer component.

Abstract: A purge dam for retaining a purge gas around a weld zone includes a purge dam structure configured to substantially obstruct an air passage leading to the weld zone. The purge dam includes a main blocking portion configured to substantially block the air passage. The purge dam structure further includes a wall portion configured to engage the air passage for attachment. Adhesive can be optionally provided on the wall portion to facilitate the air passage attachment. Some or all of the purge dam structure may be formed as a multi-layer structure that includes one or more layers of water degradable paper and one or more layers of water degradable polymer. If present, the optional adhesive may be applied to the water degradable polymer layer. The purge dam may be installed by placing the purge dam in the air passage and adhering the wall portion thereto.

Abstract: Laser cutting processes are provided which are controlled using as a reference signal one or more emission lines which are characteristic of the radiation emitted by a gas or, more generally, by an emitting element present in the volume irradiated by the laser beam focussed by a laser head and adjusting, on the basis of this reference signal, at least one of the following process control parameters: the power of the laser, the frequency and the duty cycle of the laser pulse, the pressure of an assisting gas emitted by a nozzle forming part of the laser head, the relative speed of the laser head with respect to the workpiece, the distance between the laser head and the surface of the workpiece, and the distance between the focal point of the laser beam and the surface of the workpiece. Laser cutting devices are also provided.

Abstract: A method for re-manufacturing a worn railroad car wheel is described herein. The method includes identifying a candidate wheel or wheel set, preparing the wheel or wheel set to receive new welding, performing a welding operation on the wheel/wheel set, and performing post-welding steps to ensure the re-manufactured wheel meets a defined profile standard. Preparing the wheel may include cleaning, grinding, and pre-heating one or more surfaces of the wheel.

Abstract: A cored electrode to form a weld bead with a low diffusible hydrogen is described in a gas shielded electric arc welding process. The cored electrode includes a metal sheath and a fill composition. The filling composition includes a slag forming agent and at least two fluorine containing compounds.

Abstract: A welding-type component is disclosed having a single user input that requires a user to input only a single parameter to identify a welding-type process. From the single input, operating parameters for the welding-type process automatically are set or otherwise determined. The invention streamlines the welding-type process prescription process by allowing a user to input only a single parameter than can be used to determine and coordinate other parameters for the welding-type process.

Abstract: In the bonding of an aluminum alloy material (11) to a steel material (12) by TIG welding, a tungsten electrode (1) which has a tip having a diagonally cut tip face (2) and asymmetrical to the electrode center axis (6) is used. The tungsten electrode (1) is oriented toward the welding line from the upper side of the aluminum alloy material (11) in such a manner that the tip face side of the tungsten electrode (1) faces the aluminum alloy material (11) side and the tip (2a) of the tip face (2) faces the steel material (12) side. In this manner, an arc (3) from the tip (2a) is directed to the steel material (12) side.

Abstract: A method of providing a mould with a conformal cooling passage includes rough machining a mould cavity generally corresponding to a moulded part shape using CAD data. Conformal cooling slots are cut in the mould cavity using the CAD data. The conformal cooling slots are welded shut using the CAD data to provide conformal cooling passages. A class A surface is machined over the conformal cooling passage and corresponds to a finished mould part shape using the CAD data.

Abstract: A laser processing machine with an air curtain structure comprises a machine frame, and a working platform, a processing device, and an air curtain device are disposed on the machine frame. The working platform is used for placing a workpiece. The processing device comprises a rail platform on which a laser output device is disposed. The laser output device is movable on the rail platform and can output laser on the workpiece. The air curtain device comprises at least one air inlet conduit provided with at least one air outlet at a location facing the laser output device on the rail platform. After the air curtain device is connected with an air supply device, the supplied air flows into the air curtain device through the air inlet conduit and is blown toward the laser output device from the air outlet to form an air curtain.

Abstract: A gas shielding device used during a welding step in a controlled atmosphere of a sound attenuation panel includes an inert gas injector to inject inert gas onto the panel and a housing to receive a welding torch. The inert gas injector comprises an inert gas diffuser mounted on the periphery of the housing for receiving the welding torch.

Abstract: An adjustable vacuum and support system for evacuating particulate matter, smoke, excess gasses, and molten metal from a work area during TIG welding and for providing adjustable support to a welding head. The vacuum system has a vacuum head and a vacuum nozzle. An adjustable mounting bracket arrangement has a first portion fixed to the vacuum head and a second portion securable to the welding head. The bracket arrangement establishes pivotal and slidable couplings between the welding head and the vacuum head. The vacuum nozzle has a support surface for being rested on a surface of a workpiece to support the vacuum head and the welding head. The support surface of the vacuum nozzle can be a base bevel surface at the tip of the nozzle. An opposed suction bevel surface can have a nozzle aperture interposed therealong.

Abstract: This disclosure relates generally to welding, and more specifically, to submerged arc welding (SAW). In an embodiment, a welding system includes a gas supply system configured to provide a fluorine-containing gas flow. The system also includes a wire supply system configured to provide welding wire, and a flux supply system configured to provide flux near a welding arc during submerged arc welding (SAW). The system further includes a welding torch assembly configured to receive the fluorine-containing gas flow and the welding wire and to deliver the fluorine-containing gas flow and the welding wire near the welding arc during the SAW.