Gas Supply (e.g., By Ingredient Of Electrode, By External Source) Patents (Class 219/74)
  • Publication number: 20120003035
    Abstract: A fillet weld joint of steel having high fatigue strength by improving stress concentration without excessively relying on imparting a compressive residual stress to a toe part by welding materials, free of cracking, and excellent in the toughness, and a method for gas shielded arc welding for obtaining the fillet weld joint are provided. In the fillet weld joint, a martensitic transformation starting temperature (Ms point) of a weld metal is 400° C. or above and 550° C. or below, a value obtained by dividing a toe radius ? of a toe part of welding by a sheet thickness t of a base metal (?/t) is 0.25 or above, an expression below Ms(° C.)?375×[?/t]+320??(1) is satisfied, and a crack defect does not exist.
    Type: Application
    Filed: June 23, 2011
    Publication date: January 5, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: REIICHI SUZUKI, MASAO KINEFUCHI, RYU KASAI
  • Publication number: 20110300395
    Abstract: A corrosion protection device (7) as sheathing (8) for a metallic component (3), whose positioning is provided in the effective range of an electrolyte (4) in the form of seawater. According to the present invention, the sheathing (8) is formed of a sheet metal which is connected electrically conductively to the metallic component (3), the sheet metal being made of a metal that is more noble compared to the metallic component (3), and thus has a higher potential. Consequently, the sheet metal as sheathing of the metallic component (3) represents a closed, peripheral jacket of parts of the steel structure (1b).
    Type: Application
    Filed: May 5, 2011
    Publication date: December 8, 2011
    Inventors: Hans-Guenter Wobker, Egon Mackowiak, Bernd Sagebiel, Christoph Meyerrose
  • Publication number: 20110284500
    Abstract: A method and system for detecting a welding gas leak is provided. One welding power supply includes a gas valve configured to control the flow of shielding gas to a welding device through a gas line. The welding power supply also includes a sensor coupled to the gas line and configured to detect a parameter of the shielding gas. The welding power supply includes control circuitry coupled to the gas valve and to the sensor, and configured to control the operation of the gas valve, and to receive device value representative of the detected parameter. The control circuitry is further configured to determine a leak test result based upon the parameter value, and to provide an operator indicator of the leak test result.
    Type: Application
    Filed: April 18, 2011
    Publication date: November 24, 2011
    Applicant: Illinois Tool Works Inc.
    Inventors: James Francis Rappl, Thomas Don Lahti, Jeffery Ray Ihde
  • Publication number: 20110259853
    Abstract: In consumable-electrode gas-shield arc welding, carbon dioxide gas is used as shield gas; the molten pool is formed using a pulsed arc as a leading electrode arc transferring one droplet per cycle by alternately outputting, in each cycle, pulses of two different pulse waveforms of which a pulse peak current level and/or a pulse width per period differ; the conductively heated filler wire is inserted into the molten pool as a trailing electrode; the distance between a tip of the filler wire inserted into the molten pool and a conductive point of the filler wire is set within a range of 200×10?3 to 500×10?3 m; and a leading-electrode base current value is set larger than a trailing-electrode filler current value. According to such a method, even when inexpensive carbon dioxide gas is used as shield gas, the amount of spatter can be reduced, and high weldability can be achieved in multipass welding.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 27, 2011
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Kei YAMAZAKI, Reiichi SUZUKI
  • Publication number: 20110253679
    Abstract: Disclosed is a method for performing gas-shielded pulsed arc welding at high current densities with a flux-cored wire as an electrode wire. The pulsed arc welding is carried out by passing a pulsed current so that a pulse peak current density during a pulse peak time Tp is 400 to 950 A/mm2, a pulse base current density during a pulse base time Tb is 200 A/mm2 or more and differs from the pulse peak current density by 200 to 400 A/mm2, and an average current density is 350 to 750 A/mm2. The method allows significant spatter reduction while attaining a high deposition rate.
    Type: Application
    Filed: April 13, 2011
    Publication date: October 20, 2011
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Kei YAMAZAKI, Reiichi Suzuki, Yimin Yuan
  • Publication number: 20110247999
    Abstract: A weld electrical and gas connector with sealed gas flow is provided. In an exemplary embodiment, a welding cable connector system includes a male connector having a conductive body for conveying welding power. The male connector includes a sealed passageway disposed coaxially of the conductive body for conveying shielding gas, and a gas sealing valve configured to seat to stop flow of shielding gas when the male connector is not engaged. The system also includes a female connector having a conductive body for conveying welding power. The female connector includes a sealed passageway disposed coaxially of the conductive body for conveying shielding gas, and a gas sealing valve configured to seat to stop flow of shielding gas when the female connector is not engaged. The male and female connectors are mutually engageable to conduct welding power and shielding gas therethrough.
    Type: Application
    Filed: February 11, 2011
    Publication date: October 13, 2011
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventors: Jeffery Ray Ihde, Thomas Don Lahti, James Francis Rappl, Joseph Edward Feldhausen
  • Publication number: 20110248000
    Abstract: This disclosure relates generally to arc welding. In an embodiment, a welding system has a welding gas supply system configured to supply a gas flow including a shielding gas and a fluorine-containing gas to a weld pool. Furthermore, the shielding gas is configured to control an atmosphere surrounding the weld pool, the fluorine-containing gas is configured to reduce diffusible hydrogen in the weld pool, and the fluorine-containing gas is substantially free of sulfur.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 13, 2011
    Applicant: Illinois Tool Works Inc.
    Inventors: Steven Barhorst, Mario Amata, Joseph C. Bundy
  • Publication number: 20110250472
    Abstract: The shielding gas for MAG welding according to an embodiment is a shielding gas for MAG welding to perform narrow gap welding of a high Cr steel containing 8 wt % to 13 wt % of Cr with one layer-one pass by using a solid wire containing 8 wt % to 13 wt % of Cr, and the shielding gas for MAG welding comprises a ternary mixed gas of 5% by volume to 17% by volume of a carbon dioxide gas, 30% by volume to 80% by volume of a helium gas, and a balance of an argon gas.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 13, 2011
    Applicants: TAIYO NIPPON SANSO CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuhito KAMIJO, Satoru ASAI, Katsunori WADA, Makoto TAKAHASHI
  • Publication number: 20110240604
    Abstract: A feeding lubricant for use on a welding electrode comprises about 10 to 40 wt. % of at least one soap-based lubricant, about 40 to 90 wt. % of at least one solid particulate lubricant selected from MoS2, WS2, ZnO, graphite and PTFE and up to 20 wt. % of at least one optional additional particulate lubricant ingredient.
    Type: Application
    Filed: April 2, 2010
    Publication date: October 6, 2011
    Applicant: Lincoln Global, Inc.
    Inventors: Radhika Panday, Vaidyanath Rajan, Jean Victoria Reid, Campbell Ian Sidders
  • Publication number: 20110220616
    Abstract: Welding torch assemblies including a torch body having a user interface module integrally formed therewith, a welding nozzle, and a torch lead assembly are provided. The user interface module may enable a user to control one or more parameters of a welding operation. The welding nozzle may be coupled to a first end of the torch body. The torch lead assembly may be coupled to a second end of the torch body opposite the first end and may include a weld power lead and a weld control lead.
    Type: Application
    Filed: February 2, 2011
    Publication date: September 15, 2011
    Applicant: Illinois Tool Works Inc.
    Inventors: Peter Donald Mehn, Jeffrey G. Wells, Caleb Haven
  • Publication number: 20110204031
    Abstract: The invention relates to a method and an apparatus for automated servicing of a torch head comprising at least one contact tip and a nozzle surrounding the at least one contact tip. In a first servicing device the torch head is contact-freely cleaned in an assembled state of said at least one contact tip and said nozzle. A second servicing device is used for applying a torch head treatment agent to at least a portion of the surfaces of said at least one contact tip and said nozzle. The operation of the first servicing device and the second servicing device, respectively, is started by a control unit after the torch head has been transferred to a corresponding servicing position. The torch head treatment agent may include between about 5 and about 50 percent-by-weight of boron nitride as a torch head treatment agent for servicing of a welding torch head.
    Type: Application
    Filed: December 17, 2010
    Publication date: August 25, 2011
    Inventors: Douwe-Marten Kok, Guenther Schlumpp, Karl-Heinrich Keim
  • Publication number: 20110198317
    Abstract: A method of welding a joint includes directing a first output from a high energy density heat source, such as a laser, against a first side of the joint. The method further includes directing a second output from an arc welding heat source, such as a gas metal arc welding torch, against a second side of the joint. The first output produces a keyhole surrounded by a molten metal pool which extends from the first side of the joint toward the second side of the joint. In some embodiments a third output from a second arc welding heat source may also be directed at the first side of the joint. A second molten metal pool produced by the arc welding heat source joins with the first molten metal pool and the third molten metal pool to form a common molten metal pool which solidifies to form the weld.
    Type: Application
    Filed: February 18, 2010
    Publication date: August 18, 2011
    Inventor: Dechao Lin
  • Patent number: 8000837
    Abstract: In one aspect, a programmable load forming system is programmed to perform the method of downloading a calculated path from the computer to the robot controller, moving one or more bundles along the calculated path to position the one or more bundles in a predetermined stacking position of a stacking pattern using the robot, and determining if the robot has completed moving along the calculated path. The calculated path is defined, in part, by the stacking pattern and other parameters such as, for example, bundle geometry, bundle levelness, bundle compressibility, among other parameters. In another aspect, the system is programmed to perform a method of sensing the top of a bundle and controllably placing a bundle. Additional aspects are directed to systems and methods of safely operating the robot and an inventive hopper design for holding bottom/tie sheets.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: August 16, 2011
    Assignee: J&L Group International, LLC
    Inventors: Robert M. Allen, Kevin P. Brown, Andrew B. Holt, Lynn E. Vershum
  • Patent number: 7992760
    Abstract: A device for purging gas comprises a conduit assembly defining an interior volume. The conduit assembly comprises a first conduit portion having an open first end and an open second end and a second conduit portion having an open first end and a closed second end. The open second end of the first conduit portion is disposed proximate to the open first end of the second conduit portion to define a weld region. The device further comprises a supply element supplying a gas to the interior volume at a substantially constant rate and a vent element venting the gas from the interior volume at a rate that maintains the gas in the interior volume within a pressure range suitable to hold a weld bead in the weld region in equilibrium during formation of a weld to join the first conduit portion and the second conduit portion.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: August 9, 2011
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Michael T. Wilks
  • Patent number: 7985940
    Abstract: A welder having an internal shielding gas regulator is disclosed. The welder has an internal gas cylinder and an internal regulator disposed in an enclosure. The welder may be equipped with an auxiliary shielding gas cylinder inlet so that a bulk shielding gas cylinder can be attached thereto and have a flow therefrom regulated by the internal shielding gas regulator. The welder constructed according to the invention is highly transportable, compact, and self-sufficient.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: July 26, 2011
    Assignee: Illinois Tool Works Inc.
    Inventors: Bruce Albrecht, Tim Alan Matus, Bernard J. Vogel, Kenneth A. Stanzel
  • Publication number: 20110174784
    Abstract: A method for gas-shielded arc brazing of a steel sheet; wherein a solid wire containing copper, as a main component, and aluminum is used in arc brazing of a steel sheet; and the method including periodically carrying out pulse droplet transfer and short circuit droplet transfer in arc brazing using, as a shielding gas, a mixed gas consisting of 0.03 to 0.3% by volume of oxygen gas and the remainder which is argon.
    Type: Application
    Filed: September 29, 2009
    Publication date: July 21, 2011
    Inventor: Toshikazu Kamei
  • Publication number: 20110168678
    Abstract: A method for welding copper includes steps of spraying an inert gas to copper that is an object to be welded to cover a portion to be welded on the copper with the inert gas, and performing electrical discharge to weld the portion to be welded. The inert gas that covers the portion to be welded passes a dehumidifying process that removes moisture contained in the inert gas.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 14, 2011
    Applicant: DENSO CORPORATION
    Inventors: Hiroaki TAKEDA, Keigo Moriguchi, Shigeisa Nishio
  • Publication number: 20110168677
    Abstract: Electric welding method is provided of aluminium or aluminium alloy in a magnetic field, the aluminium or aluminium alloy adjacent to a weld joint under formation has an oxide layer, and the free end of a welding wire is supplied with a surrounding shielding gas. Furthermore, a welding wire is used that comprises aluminium or aluminium alloy provided with an oxide-inhibiting coating, which forms the outer covering or sheath of the welding wire and/or that as said shielding gas there is used a shielding gas with oxygen incorporated therein, or that the shielding gas is supplied with oxygen during the welding process. When the process is carried out in a magnetic field, the minimum frequency of the welding current is selected as a function of the strength of the magnetic field. A method is also provided for producing the welding wire and necessary material conditions for a usable welding gun.
    Type: Application
    Filed: December 17, 2008
    Publication date: July 14, 2011
    Applicant: EFD INDUCTION A.S.
    Inventor: Ketil Hornaes
  • Publication number: 20110163072
    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.
    Type: Application
    Filed: December 17, 2010
    Publication date: July 7, 2011
    Applicant: Illinois Tool Works Inc.
    Inventor: Bernard J. Vogel
  • Publication number: 20110132877
    Abstract: A welding system is provided which can weld in narrow gap thick walled work pieces, the welding system having a magnetic field unit which contains a magnetic coil, a magnetic field probe, and a shielding gas tube and nozzle. The unit having a shape and configuration which delivers the shielding gas and magnetic field close to the welding arc so as to provide for a shielded welding arc which is manipulated as desired by the magnetic field.
    Type: Application
    Filed: November 24, 2010
    Publication date: June 9, 2011
    Applicant: LINCOLN GLOBAL, INC.
    Inventors: Victor Miller, Lane Litke
  • Publication number: 20110132878
    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.
    Type: Application
    Filed: August 5, 2009
    Publication date: June 9, 2011
    Applicant: Panasonic Corporation
    Inventors: Jingbo Wang, Hitoshi Nishimura
  • Publication number: 20110120977
    Abstract: An alloy comprising about 0.5 weight percent to about 2 weight percent carbon, about 15 weight percent to about 30 weight percent chromium, about 4 weight percent to about 12 weight percent nickel, up to about 3 weight percent manganese, up to about 2.5 weight percent silicon, up to about 1 weight percent zirconium, up to about 3 weight percent molybdenum, up to about 3 weight percent tungsten, up to about 0.5 weight percent boron, up to about 0.5 weight percent impurities, and iron.
    Type: Application
    Filed: January 19, 2010
    Publication date: May 26, 2011
    Inventors: George Y. Lai, Bingtao Li
  • Publication number: 20110114606
    Abstract: A wire is adopted to hardfacing MIG-arc welding using a pure argon gas as a shielding gas. The wire is a flux-cored wire prepared through drawing a steel hoop or steel pipe as a sheath in which a flux is filled. The flux contains, based on the total mass of the wire, C: 0.12 to 5.00 percent by mass, Si: 0.50 to 3.00 percent by mass, Mn: 0.30 to 20.00 percent by mass, P: 0.050 percent by mass or less, S: 0.050 percent by mass or less, and at least one of TiO2, ZrO2, and Al2O3 (TiO2+ZrO2+Al2O3) in a total content of 0.10 to 1.20 percent by mass and has a total content of silicon and manganese (Si+Mn) of 1.20 percent by mass or more. The wire has a ratio of the total mass of the flux to the mass of the wire of 5 to 30 percent by mass.
    Type: Application
    Filed: October 15, 2010
    Publication date: May 19, 2011
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventor: Reiichi SUZUKI
  • Publication number: 20110108527
    Abstract: A method for root pass welding steel plate and pipe is provided that uses pulse arc welding having a current pulse waveform exhibiting a low constant background current and fixed frequency. The welding process may be performed without a backer or backing material.
    Type: Application
    Filed: November 11, 2009
    Publication date: May 12, 2011
    Applicant: LINCOLN GLOBAL, INC.
    Inventors: Steven R. Peters, Frank M. Dragolich, JR., David Barton
  • Publication number: 20110100961
    Abstract: A method for welding dissimilar metals involved selecting a steel having approximately 1-3 weight % chromium (Cr) content and a first coefficient of thermal expansion at a predetermined first temperature for a first part [14], selecting a nickel-based alloy having a second coefficient of thermal expansion at a second predetermined temperature for a second part [12], the first and second coefficients of thermal expansion having a maximum difference of approximately 2-3% when the first predetermined temperature is approximately 500-550° C. and the second predetermined temperature is approximately 600-650° C., then welding the first part to the second part [12].
    Type: Application
    Filed: November 5, 2009
    Publication date: May 5, 2011
    Applicant: ALSTOM Technology Ltd
    Inventor: Robert E. Kilroy, JR.
  • Publication number: 20110073570
    Abstract: The present invention provides a flux cored wire for gas shielded arc welding of high-strength steel having proof stress of 690 MPa or more, which is capable of all-position welding with a higher efficiency and exhibits an excellent cracking resistance. The flux cored wire comprising a steel sheath, and a flux filled therein, wherein the flux cored wire comprises, by mass % with respect to the total mass of the flux cored wire: C: 0.03 to 0.10%, Si: 0.25 to 0.7%, Mn: 1.0 to 3.0%, Ni: 1.0 to 3.5%, B: 0.001 to 0.015%, Cr: limited to 0.05% or less, and Al: limited to 0.05% or less, and in the flux, TiO2: 2.5 to 7.5%, SiO2: 0.1 to 0.5%, ZrO2: 0.2 to 0.9%, and Al2O3: 0.1 to 0.4%; and the remainder comprising: Fe, arc stabilizer, and unavoidable impurities; and wherein the total mount of hydrogen in the flux cored wire is in 15 ppm or less.
    Type: Application
    Filed: September 25, 2009
    Publication date: March 31, 2011
    Applicant: NIPPON STEEL & SUMIKIN WELDING CO., LTD.
    Inventors: Ryuichi Shimura, Toshiei Hasegawa, Kazuhiro Kojima, Tadashi Kasuya
  • Patent number: 7915560
    Abstract: The TIG welding methods of the present invention include generating an electric arc between an electrode and an object to weld the object, wherein a first shielding gas including an inert gas flows toward the welded object surrounding the electrode, a second shielding gas containing an oxidative gas flows toward the welded object along a periphery of the first shielding gas, and the concentration of the oxidative gas in the second shielding gas is set such that the oxygen concentration in the welded metal portion of the welded object is within a range of 70 to 220 wt. ppm.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: March 29, 2011
    Assignee: Taiyo Nippon Sanso Corporation
    Inventors: Toyoyuki Satou, Koji Nakamura, Yutaka Kimura, Hidetoshi Fujii, Shanping Lu, Kiyoshi Nogi
  • Publication number: 20110062120
    Abstract: A device and a method for welding a component are provided. The component is arranged and welded in a chamber. A welding appliance is provided, the welding appliance being arranged outside the chamber.
    Type: Application
    Filed: February 2, 2009
    Publication date: March 17, 2011
    Inventors: Bernd Burbaum, Selim Mokadem, Norbert Pirch
  • Publication number: 20110036815
    Abstract: The present invention includes a multi-use welding gun body configured for use in multiple locations along a welding gun assembly. In a particular embodiment, the multi-use welding gun body includes an enclosure forming an exterior surface of the body, the enclosure configured for both receiving a welding wire and a power source and directing the same toward a torch and having a first enclosure end with a wire-receiving aperture extending to an internal block-receiving cavity, the wire receiving aperture shaped to selectively receive a torch and an extension having an orifice containing both welding wire and shielding gas. The block-receiving cavity of the enclosure extends axially with a non-circular profile to a cable-receiving cavity within the housing, the cable-receiving cavity extending longitudinally to the second enclosure end. The second enclosure end includes an aperture forming an end of the cable-receiving cavity. A removable block is positioned within the block-receiving cavity.
    Type: Application
    Filed: August 16, 2010
    Publication date: February 17, 2011
    Applicant: LINCOLN GLOBAL, INC.
    Inventor: Frank Zamuner
  • Publication number: 20110024528
    Abstract: An air knife system includes a first set of openings and a second set of openings arranged along opposite first and second walls, respectively, of a main body. The first set of openings may be aligned with the second set of openings such that a coupling member may be inserted through each one of the first set of openings and a corresponding one of the second set of openings. The coupling members may be fixedly joined to the first and second sets of openings to maintain a desired width of a discharge slot defined by a first lip extending from the first wall and a second lip extending from the second wall. In one embodiment, the coupling members may be joined to the first and second sets of openings using a welding process.
    Type: Application
    Filed: May 27, 2010
    Publication date: February 3, 2011
    Applicant: Illinois Tool Works Inc.
    Inventor: Allen S. Pucciani
  • Publication number: 20110011836
    Abstract: In response to plasma keyhole welding of a workpiece, in the case of which a plasma jet is generated using an electrode, to which a welding current is applied, and at least one process gas, wherein at least one gas composition (22) and/or a gas volume flow rate (20, 21) of the process gas is temporally changed, the gas composition (22) and/or a gas volume flow rate (20, 21) of at least one process gas are temporally changed during a welding process as a function of at least one basic condition (E1, E2) of the welding process
    Type: Application
    Filed: July 16, 2010
    Publication date: January 20, 2011
    Inventor: Gerald Wilhelm
  • Patent number: 7863538
    Abstract: The gas-metal arc welding of metal-core wile electrodes in the pure Ar shielding gas for carbon steel, low alloy steel, and ferritic stainless steel is described. Such shielding gas provides several benefits not realized ??the gas-metal arc welding process with solid wires. When compared to standard argon/oxygen containing gas mixtures normally used for metal cored wires, these benefits include reduced silicate islands on the weld surface for improved weld appearance, reduced welding fume, and lower weld spatter, all of which provide easier clean-up after the welding operation. Benefits also include reduced arc penetration desirable for welding on thinner materials or handling poor joint fit-up. Lower voltage requirement further makes it possible to weld on thinner materials. Lower oxygen content in the weld deposits provide better toughness and easier welding in all-positions.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: January 4, 2011
    Assignee: Hobart Brothers Company
    Inventors: Steve Barhorst, Joseph Bundy, Daryl Duncan
  • Publication number: 20100323213
    Abstract: A wear resistant multilayer overlay includes a first layer on at least a surface of an article, and a second layer metallurgically bonded to at least a portion of the first layer. The first layer includes a first continuous metallic matrix and at least one of first hard particles, blocky diamond particles, non-blocky diamond particles, TSP diamond, cubic boron nitride particles, and PCD compacts embedded in the first continuous metallic matrix, wherein the first hard particles are at least one of transition metal carbide particles and boron nitride particles. The second layer includes a second continuous metallic matrix and at least one of second hard particles, blocky diamond particles, non-blocky diamond particles, TSP diamond, cubic boron nitride particles, and PCD compacts, embedded in the second continuous metallic matrix, wherein the second hard particles are at least one of transition metal carbide particles and boron nitride particles. Related methods and articles of manufacture also are disclosed.
    Type: Application
    Filed: June 19, 2009
    Publication date: December 23, 2010
    Inventors: Trevor Aitchison, R. Allan Heflin
  • Publication number: 20100320174
    Abstract: A system for welding a tub of a railroad tank car includes a manipulator boom adapted to move with respect to the interior surface of the tank shell. A hybrid laser arc welding head mounted to the manipulator. A supplemental gas metal arc welding head includes dual wires of welding material and is mounted to the manipulator adjacent to the hybrid laser arc welding head. An inductive heating coil is mounted adjacent to the supplemental gas metal arc welding head. The hybrid laser arc welding head welds a seam of the railroad tank car shell with the supplemental gas metal arc welding head following to generally complete filling of a resulting weld joint with welding metal. The supplemental gas metal arc welding head is followed with the inductive heating coil to provide heat to normalize the resulting weld joint.
    Type: Application
    Filed: June 17, 2010
    Publication date: December 23, 2010
    Inventors: Carl S. Hybinette, Robert S. Toms
  • Publication number: 20100301018
    Abstract: Control apparatus for a gas-shielded welding arrangement which includes a monitor for logging welding parameters, a gas surge tank, the volume of which is adjustable to take account of the pressure of a gas-supply source, and a lockable device which prevents unauthorised access to a pressure regulator on the surge tank.
    Type: Application
    Filed: May 27, 2010
    Publication date: December 2, 2010
    Inventor: Wayne Andrew HOLT
  • Publication number: 20100288734
    Abstract: A new method of process control for fusion welding maintains a controlled weld pool size or volume, for example in some applications a substantially constant weld pool size or volume. The invention comprises a method of linking machine and process variables to the weld pool size or volume in real time, thereby enabling constant weld pool volume control. The invention further comprises a method of using thermal inverse models to rapidly process real-time data and enable models-based control of welding processes so as to implement constant weld pool volume control.
    Type: Application
    Filed: May 14, 2010
    Publication date: November 18, 2010
    Inventors: Vivek R. Dave, Mark J. Cola
  • Publication number: 20100276397
    Abstract: Electrically isolated gas cups for plasma transferred arc welding torches, plasma transferred arc welding torches including such gas cups, and related methods are disclosed. In one embodiment a gas cup includes a dielectric portion sized and configured to couple with a torch body and electrically isolate the gas cup from the torch body. In additional embodiments, a plasma transferred arc welding torch includes an anode, a cathode, a torch body coupled to the anode and the electrode, and a gas cup at least partially surrounding the anode and electrically isolated from the torch body. In further embodiments, a method of coupling a gas cup to a plasma transferred arc welding torch includes coupling a dielectric structure to a gas cup and coupling the dielectric structure to a torch body to electrically isolate the gas cup from the torch body.
    Type: Application
    Filed: May 1, 2009
    Publication date: November 4, 2010
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: David Keith Luce
  • Publication number: 20100276399
    Abstract: A spool gun having a quick connector connectable to an electrical power source and a gas source is disclosed. A connection line extends from the spool gun and is attached to a connector. The connector both fluidly connects the spool gun to a shielding gas source and electrically connects the spool gun to a power source constructed to generate a welding-type power. Such a spool gun is quickly and efficiently connectable to the gas and power systems required for performing welding processes.
    Type: Application
    Filed: July 12, 2010
    Publication date: November 4, 2010
    Applicant: Illinois Tool Works Inc.
    Inventor: Kenneth A. Stanzel
  • Publication number: 20100276396
    Abstract: The present invention relates to arc welding torch and a method of extracting fume gas from a welding site. The torch comprises a metal electrode and at least one shield gas port adapted to direct a shield gas curtain around the metal electrode and a welding site. At least one shroud gas port is spaced radially outward from the shield gas port and adapted to impart to an exiting shroud gas a radially outward component of velocity. Fume gas is preferably extracted from a position radially intermediate the shield gas curtain and the shroud gas curtain.
    Type: Application
    Filed: March 21, 2007
    Publication date: November 4, 2010
    Inventors: Paul Cooper, Ajit Godbolb, John Norrish
  • Publication number: 20100276398
    Abstract: A shielding gas (SG) flow controller for an arc welder includes SG input/output with a controllable valve therebetween, and having a control input, and a controller having a first input receiving a welding signal representing arc current and a gas flow setting controller generating a flow setting output based on the welding signal, representing a desired SG flow. Input and output pressure sensors provide SG input and out pressure to second and third controller inputs, respectively. A flow setting output modifier modifies the flow setting output of the gas flow setting controller based on the SG input/output pressure, the welding signal, and a characteristic of the controllable valve into a control signal input to the control input of the controllable gas valve to maintain a substantially constant SG flow corresponding to the flow setting output substantially independent of actual SG input/output pressures.
    Type: Application
    Filed: September 1, 2008
    Publication date: November 4, 2010
    Applicant: WELTEC AS
    Inventors: Arild Halvorsen, Magne Farstad
  • Publication number: 20100270269
    Abstract: A welding apparatus for welding a work piece is provided that has a weld gun with a nozzle body having an inner surface defining a cavity, and a distal opening forming a nozzle orifice. An electrode extends in the cavity and is configured to be positionable proximate the work piece. The weld gun is configured to provide a flow of shielding gas through the nozzle orifice. The welding apparatus is configured to position the nozzle orifice at a distance from the work piece sufficient to cause the inner surface to direct weld spatter to a weld pool on the work piece adjacent the nozzle. Additionally, the distance is such that laminar flow of the shielding gas is maintained under the predetermined gas flow rate.
    Type: Application
    Filed: April 22, 2009
    Publication date: October 28, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Alexander D. Khakhalev, Jay Hampton
  • Publication number: 20100270270
    Abstract: Provisions of shields for protecting welds as well as providing heat treatments are advantageous. Previously such shields were bespoke constructions produced iteratively and empirically for particular applications and uses. By utilisation of accurately cut sheets of material within which labyrinths are created it is possible to produce an output flow which is even and incorporates no vortexes. In such circumstances problems with regard to edge entrainment of oxygen causing possible oxidation problems in output flows as well as variations in heat treatments can be avoided. The shield also avoids use of welds which may become distorted during welding or heat treating processes. For reproducibility the shield is formed from accurately produced reproducibility components such that shields can be made at a number of sites to provide the same shield function.
    Type: Application
    Filed: October 28, 2008
    Publication date: October 28, 2010
    Applicant: Rolls-Royce PLC
    Inventor: Jeffrey C. Bishop
  • Patent number: 7800011
    Abstract: A MIG welded joint between aluminum and steel members is obtained by overlapping the aluminum member and the steel member each other and performing MIG welding using a filler wire made of a 4000 or 5000 series aluminum alloy on an end face of the overlapped aluminum member, wherein the aluminum member has a thickness P ranging from 0.5 to 2.0 mm, and the steel member has a thickness Q satisfying the following formula: 0.6?Q/P?0.8, whereby a penetration depth of the steel member is equal to or less than 5% of the thickness Q thereof.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: September 21, 2010
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Toshihiko Fukuda, Masaki Kumagai
  • Publication number: 20100230389
    Abstract: A drawn arc welding process that includes the steps of a) providing a welding device having a fastener, b) providing a power supply and controller linked with the welding tool, c) providing a work piece, d) energizing a main welding current in the welding tool locally melting the workpiece and forming a weld pool, e) changing the energizing current to a predetermined plunge current, and f) plunging the fastener into the locally melted workpiece at the predetermined plunge current forming a weld between the fastener and the work piece.
    Type: Application
    Filed: September 16, 2009
    Publication date: September 16, 2010
    Applicant: Nelson Stud Welding, Inc.
    Inventors: Christopher Hsu, Jeffrey J. Krupp
  • Publication number: 20100193477
    Abstract: An apparatus for improved narrow-gap welding is provided. The apparatus includes an inert gas tube within which a contact tube is arranged, the contact tube includes a wire feed for a melting wire. The end of the inert gas tube is ceramic. In another embodiment, the inert gas tube of the apparatus includes a plurality of materials with a high thermal conductivity. A first metallic material at the end of the inert gas tube has a higher thermal conductivity than a second material at a start of the inert gas tube. The first metallic material is molybdenum, tungsten, an alloy of molybdenum or tungsten, or copper or a copper alloy.
    Type: Application
    Filed: January 27, 2010
    Publication date: August 5, 2010
    Inventor: Karl-Heinz Gunzelmann
  • Publication number: 20100193476
    Abstract: An apparatus for improved narrow-gap welding is provided. The apparatus includes an inert gas tube within which a contact tube is arranged, the contact tube includes a wire feed for a melting wire. In one embodiment, the inert gas tube includes a plurality of cooling tubes in order to provide active cooling. In another embodiment, the inert gas tube is rectangular.
    Type: Application
    Filed: January 27, 2010
    Publication date: August 5, 2010
    Inventor: Karl-Heinz Gunzelmann
  • Publication number: 20100183112
    Abstract: The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 22, 2010
    Inventors: Eiji ASHIDA, Xudong Zhang, Shoh Tarasawa, Masaya Okada, Yusuke Anma
  • Publication number: 20100181292
    Abstract: The present invention relates to a system and method for automated or “robotic” application of hardfacing to the surface of a steel-toothed cutter of a standard earth-boring rock bit or a hybrid-type rock bit. In particular, the system incorporates a grounded adapter plate and chuck mounted to a robotic arm for grasping and manipulating a rock bit cutter, particularly a hybrid rock bit cutter, beneath an electrical or photonic energy welding source, such as a plasma arc welding torch manipulated by a positioner. In this configuration, the torch is positioned substantially vertically and oscillated along a horizontal axis as the cutter is manipulated relative along a target path for the distribution of hardfacing. Moving the cutter beneath the torch allows more areas of more teeth to be overlayed, and allows superior placement for operational feedback, such as automatic positioning and parameter correction.
    Type: Application
    Filed: December 31, 2009
    Publication date: July 22, 2010
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Bruce STAUFFER, David LUCE, Alan MASSEY, Kenneth GILMORE, Keith NEHRING
  • Publication number: 20100176092
    Abstract: Apparatus and method for controlling blanket gas flow in an electrical welding facility, wherein welding is performed using a welding electrode in electrical connection with a welding machine unit. The apparatus includes an electric measuring device having a current sensor for determining the magnitude of an electrical welding current carried in a circuit incorporating the welding electrode and having a current sensor output adapted to provide a I signal indicating the current magnitude, and a voltage sensor for determining the magnitude of electrical voltage applied to the welding electrode and having a voltage sensor output for providing a U signal indicating the voltage magnitude, and a control device having inputs connected to the current sensor output and the voltage sensor output, respectively, and a control signal output for providing a control signal to a blanket gas flow controller.
    Type: Application
    Filed: January 23, 2008
    Publication date: July 15, 2010
    Applicant: WELTEC AS
    Inventor: Arild Halvorsen
  • Publication number: 20100176108
    Abstract: In a plate assembling step, a gap (5) is formed between a leading end portion (3A) of a groove (3) provided on an upright plate (2) and a lower plate (1). An arc is generated from a welding wire (7) toward a back surface (3C) side of the groove (3) through the gap (5), to form a satisfactory penetration bead (8) on the back surface (3C) side of the groove (3). Next, the welding wire (7), the lower plate (1), the groove (3) of the upright plate (2) and the penetration bead (8) are fused to form a first-layer welding bead (9), thereby firmly joining the lower plate (1) and the groove (3) of the upright plate (2). The first and second welding steps are performed continuously after performing the plate assembling step, to enhance workability at the time of welding the lower plate (1) and the upright plate (2).
    Type: Application
    Filed: September 26, 2008
    Publication date: July 15, 2010
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Toru Nakajima, Hikaru Yamamoto