Methods Patents (Class 219/61)
  • Patent number: 10166623
    Abstract: A method of operating a welding power supply during a welding process in which an electric arc between a consumable electrode and a work piece is generated while feeding the consumable electrode and moving the arc in relation to the work piece along a welding track, wherein a transition between a DC power output of the welding power supply and an AC power output of the welding power supply, or vice versa, is made without interruption of the welding process.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: January 1, 2019
    Assignee: ESAB AB
    Inventor: Per Aberg
  • Patent number: 10144084
    Abstract: Welding system and method permit exchange of data with Smart Grid monitors and/or controllers. The welding systems include a welding power supply configured to convert power between the power grid and the welding power supply. A grid interface cooperates with control circuitry to transmit data to and/or from the grid monitors and/or controllers on the grid side. The control circuitry may control operation of the welding power supply based upon data from the grid. The system may include power generation devices (e.g., engine-drive generators) and energy storage devices (e.g., batteries). The control circuitry may control operation of such devices, the exchange of power between them, and the draw of power from the grid or the application of power to the grid based upon the data exchanged with the grid monitors and/or controllers.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: December 4, 2018
    Assignee: ILLINOIS TOOL WORKS INC.
    Inventors: Thomas Allen Bunker, Bruce Patrick Albrecht
  • Patent number: 9623509
    Abstract: A method for gas tungsten arc welding (GTAW) of nickel-aluminide is provided. The method includes machining a weld groove having a width from 1 to 2 mm on an outer surface, a weld groove angle with a vertical being less than 30°; and a root face being not longer than 3 mm. During welding, a measured temperature 30 cm (12?) from a weld torch and 3 mm from the weld groove edge should not exceed 200° C.; and an interpass temperature should be less than 85° C. measured at 3 mm from the weld groove edge. With exception of the root pass, all filler and cap pass layering should start from the nickel-aluminide edge, each bead should be peened; and the weld cap pass should overlap on the nickel-aluminide surface edge by at least 3 mm. The weld bead layout at the nickel-aluminide edge should be laid at torch angle less than 30°, and the weld heat input should be in the range of 17 to 23 kJ/in. The linear welding speed is greater than 8.6 cm/min and a deposition rate should be greater than 3.0 cm3/min.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: April 18, 2017
    Assignee: ArcelorMittal
    Inventor: Sree Harsha Lalam
  • Patent number: 9611956
    Abstract: Apparatus and method for welding steel boiler tubes in a space restricted area using a pulsed-arc welding process. The process includes the use of a consumable insert ring having a T-shaped profile and flux material to provide deep weld penetration by a GTAW welding machine. Notches in the consumable weld ring allow for visual inspection of tube fit prior to weld.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: April 4, 2017
    Inventors: Denny L. Quinn, Alan W. Braun, Brian S. Luigs, Earl L. Young
  • Patent number: 9381720
    Abstract: Disclosed are a tailor welded blank and a manufacturing method thereof. The tailor welded blank is manufactured by connecting blank elements of different materials or thicknesses, thereby eliminating quality problems in a welded zone. A hot stamped component is manufactured by hot stamping the tailor welded blank formed by laser-welding blank elements made of coated steel plates having different strengths or thicknesses using a filler wire, wherein a laser-welded zone has a martensite structure.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: July 5, 2016
    Assignee: HYUNDAI STEEL COMPANY
    Inventors: Min-Suck Kwon, Yun-Gyu Kim, Young-Jin Kim, Chung-Yun Kang, Jong-Pan Kong, Myeong-Hwan Oh, Hyeon-Jeong Shin, Seung-Taik Oh
  • Patent number: 9321132
    Abstract: The invention relates to a hybrid laser/arc-welding method using an electric arc and a laser beam that are combined together within a single welding melt to which molten metal is supplied by melting a filler wire, wherein the welding melt is provided on at least one steel part including an aluminum surface coating, and a protective gas is used, characterized in that the filler wire contains at least 3 wt % of one or more gammagenic elements, in particular the gammagenic elements selected from C, Mn, Ni and N, and the protective gas consists of helium and/or argon with the addition of at least 10 vol % of nitrogen or oxygen. The method of the invention is particularly suitable for welding end-welded flanks used in the field of manufacturing automobiles or for tube welding.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: April 26, 2016
    Assignee: L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude
    Inventors: Francis Briand, Olivier Dubet
  • Patent number: 9321119
    Abstract: Provided are a combination welding method and a combination arc welding machine thereof having excellent construction efficiency and preventing a deterioration of toughness of a HAZ by maintaining the current density of each of gas metal arc welding and submerged-arc welding within an appropriate range at the time of welding a steel plate by the combination of the gas metal arc welding using multielectrodes and the submerged-arc welding using multielectrodes. The gas metal arc welding is performed using two or more electrodes, a wire for welding having a wire diameter of 1.4 mm or more is used in the first electrode of the gas metal arc welding, and a current density of the first electrode is set to 320 A/mm2 or more.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: April 26, 2016
    Assignee: JFE Steel Corporation
    Inventors: Naoya Hayakawa, Kenji Oi, Atsushi Ishigami, Kenji Shimada, Masahiro Odaka
  • Patent number: 9040865
    Abstract: A method and apparatus for joining materials having primarily ferritic properties is described. The method includes joining the ferritic materials using a welding process and a weld material having a primarily austenitic microstructure. The resulting weldment enhances the properties of yield ratio, uniform elongation, toughness and tearing resistance thereby producing superior strain capacity. High strain capacity produces a structure that accommodates high axial loading. The weldment can also accommodate larger than conventional weld flaws while maintaining sufficient strength, tearing resistance, and fracture toughness under high axial loading.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: May 26, 2015
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Danny L. Beeson, James B. LeBleu, Jr.
  • Publication number: 20150129556
    Abstract: The invention relates to a device and method for producing at least partially closed profiles from metal sheet, having a first tool part, a second tool part, and at least one supporting core. The insertion movement of the supporting core between the bending jaws is limited by a stop and, in its insertion position limited by the stop, protrudes with respect to the bending jaws in the direction of the die, in that the supporting core is arranged on a carrier that is movable relative to the die, and in that the bending jaws are assigned at least one displacement element connected rigidly thereto, the displacement element coming into contact with the carrier when the bent metal sheet portion engages around the supporting core.
    Type: Application
    Filed: April 3, 2012
    Publication date: May 14, 2015
    Applicant: ThyssenKrupp Steel Europe AG
    Inventor: Thomas Grosseruschkamp
  • Patent number: 9000323
    Abstract: A method for connecting a shaft and a hub, the hub having a first joining portion and a second joining portion for a connection to corresponding joining portions of the shaft. The shaft and the hub are pressed together at contact points in the area of the first joining portions, while the second joining portions are not yet in contact with one another, and a welding current is fed via the contact points of the parts that have been pressed together, so that the contact points fuse. The shaft is pressed into the hub, while the first joining portions are being fused, until substantially a press fit is formed between the second joining portions.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: April 7, 2015
    Assignee: MAGNA Powertrain AG & Co KG
    Inventors: Alexander Dietrich, Markus Schuiki
  • Patent number: 9000320
    Abstract: A method of manufacturing an electric resistance welding pipe is provided in which a lateral edge shape is made to be an appropriate shape immediately before electric resistance welding is performed, whereby penetrators are securely removed during the electric resistance welding and, consequently, an electric resistance welding pipe having excellent characterization of welded seam can be obtained. A fin shape in finpass forming is printed to lateral edges of a strip, whereby the lateral edges of the strip are shaped with predetermined tapering.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: April 7, 2015
    Assignee: JFE Steel Corporation
    Inventors: Kazuhito Kenmochi, Takatoshi Okabe, Hiroyasu Yokoyama, Yuji Sugimoto, Muneyoshi Murakami, Osamu Shiotani, Nobuyuki Matsuo, Tomohiro Inoue, Kenichi Iwazaki
  • Patent number: 8941023
    Abstract: In a method for producing welded helical seam tubes having optimized tube geometry a metal strip is helically formed into an open seam tube by means of a forming unit and the converging strip edges are welded together, wherein an actual diameter determined on the welded tube is compared with a specific target diameter and a possible deviation lying outside a tolerance threshold is used to correct the actual tube diameter, wherein the strip edges are completely welded in a two stage step, including tack welding as a first step immediately after the shaping to form an open seam tube and thereafter final welding as a second step. The tube diameter is measured after the complete shaping to form an open seam tube and before the final welding. For this purpose, the diameter measuring device is arranged in such a way that either the completely shaped open seam tube or the only tack-welded tube is measured.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: January 27, 2015
    Assignee: Salzgitter Mannesmann Grossrohr GmbH
    Inventors: Carsten Holste, Franz Martin Knoop
  • Publication number: 20150015007
    Abstract: A reinforcement beam is roll formed from a metal sheet for use in a vehicle bumper system. The reinforcement beam includes adjacent tubes having a common center wall and lateral portions extending from opposing sides of the common center wall that are roll formed simultaneously in the same rotational direction to enclose interior volumes of the adjacent tubes and to define top and bottom walls and front and rear wall of the reinforcement beam. The front walls of the adjacent tubes each include a channel rib depressed into the interior volume of the respective adjacent tube longitudinally along the reinforcement beam for stiffening the respective front wall. A weld is formed separately in each of the seams between the front walls and between the rear walls, thereby defining a crevice rib between the channel ribs to improve the bending strength and torsional strength of the reinforcement beam.
    Type: Application
    Filed: September 22, 2014
    Publication date: January 15, 2015
    Inventors: Thomas Johnson, Doug Witte, Daniel Gatti, Brian Oxley, Brian Malkowski
  • Publication number: 20150007904
    Abstract: In an abrasion resistant welded steel pipe, each of a base material and a weld metal contains specific amounts of chemical composition. The base material of the abrasion resistant welded steel pipe has a Vickers hardness within the range of 150 to 250, and the weld metal has a Vickers hardness within the range of 230 to 350. A weld heat affected zone in the abrasion resistant welded steel pipe has a Vickers hardness within the range of 150 to 350. In the weld metal, the dispersion density of a sulfide having an aspect ratio of 5 or more and containing at least one selected from Fe, Mn, and Ti is 10 grains/mm2 or less. The abrasion resistant welded steel pipe that can be produced at high productivity and low cost with no reduction in weld crack resistance can be provided.
    Type: Application
    Filed: January 8, 2013
    Publication date: January 8, 2015
    Applicant: JFE Steel Corporation
    Inventors: Akihiko Tanizawa, Mitsuhiro Okatsu, Keiji Ueda, Kimihiro Nishimura, Shinji Mitao
  • Publication number: 20140346163
    Abstract: The present invention is directed to a system for welding together segments of a pipeline. The system includes an external alignment mechanism for externally supporting and manipulating the orientation of pipe segments in order to align relative segments. The system also includes an internal welding mechanism for applying a weld to an interior face joint of the two abutted pipe segments. The internal welding mechanism including a torch for applying a weld, a laser for tracking the weld profile and guiding an articulating head of the torch, and a camera for visually inspecting the weld after the weld is applied.
    Type: Application
    Filed: May 8, 2014
    Publication date: November 27, 2014
    Inventors: Shankar Rajagopalan, Siddharth Mallick, Jose C. Bouche
  • Patent number: 8871039
    Abstract: The present invention provides a thick welded steel pipe excellent in low temperature toughness in which contents of Mn and Mo satisfy (Expression 1) below, Pcm obtained by (Expression 2) below is 0.16 to 0.19, and a metal structure of a base material steel plate consists of ferrite being 30 to 95% in an area ratio and a low temperature transformation structure, and in a metal structure of a coarse-grained HAZ, an area ratio of grain boundary ferrite is 1.5% or more, the total area ratio of the grain boundary ferrite and intragranular ferrite is not less than 11% nor more than 90%, an area ratio of MA is 10% or less, and its balance is composed of bainite. 1.2325?(0.85×[Mn]?[Mo])?1.5215??(Expression 1) and Pcm=[C]+[Si]/30+([Mn]+[Cu]+[Cr])/20+[Ni]/60+[Mo]/15+[V]/10??(Expression 2).
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: October 28, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Yasuhiro Shinohara, Takuya Hara, Naoki Doi, Eiichi Yamashita
  • Patent number: 8841576
    Abstract: A method for producing a metal sheet with a welded-on tube which has at least partially curved sections, wherein the tube is guided by at least one guide element onto the sheet, is pressed thereon with at least one pressure element and is welded thereto at least at some points and wherein the tube is bent to form the curved sections. In order to achieve the welding-on in a simple manner even in the curved sections, it is provided that a bending is carried out in a plurality of discrete steps, wherein in individual steps firstly the tube with the at least one guide element is bent around a last created welding point and thereafter a new welding point is created. Furthermore, the invention relates to a device for carrying out the method.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: September 23, 2014
    Assignee: DTEC GmbH
    Inventors: Michael Dietl, Arnold Teufel
  • Patent number: 8835808
    Abstract: The present invention relates to a method and apparatus to be used when welding two abutting sections of pipe or tubing, and also to purge blocks for establishing a localized inert atmosphere inside two abutting pipe sections in the region of a desired weld joint. The present invention comprises an inflatable bladder with elongated engaging members that can be removable positioned within the ends of two abutting pipe sections in order to center the two abutting sections of pipe and create the purge block.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: September 16, 2014
    Inventor: John M. Boatner, Jr.
  • Patent number: 8829384
    Abstract: A guiding and shaping system for producing welded pipes made from metallic strip material. The guiding and shaping system comprises several pairs of rolls that are disposed one behind another in the direction of travel of the workpiece and are used for increasingly cold-working and bending the edges of the workpiece as the workpiece advances. First pairs of rolls grip the top side and bottom side of the workpiece while pairs of rolls that grip the external faces of the bent edges and form the shape of a pipe are provided in the region where the bent edges form undercuts. The guiding and shaping system further comprises a welding device. The workpiece is supported by floatingly mounted lateral rolls until cooling off following the welding process.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: September 9, 2014
    Assignee: Wuppermann Edelstahltechnik GmbH
    Inventor: Manfred Hartmann
  • Patent number: 8785805
    Abstract: A covering for a containment pool, tank or enclosure, in particular a containment enclosure for a nuclear power plant, is produced by placing metal sheets parallel to a first wall at a predetermined distance from the latter, each sheet comprising anchoring elements, on a first face arranged facing the first wall, placing a rail situated between the anchoring elements and comprising side walls and a base delineating a space facing the area to be welded with two adjacent sheets, making a weld bead by full-penetration butt welding of the adjacent metal sheets, and pouring concrete between said first wall and the metal sheets, the anchoring elements of the metal sheets being completely independent from the weld bead after the concrete has been poured.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: July 22, 2014
    Assignee: Societat d'Obres I Treballs Subterranis del Pirineu, S.L. (Sots, S.L.)
    Inventor: Jean Simon
  • Patent number: 8729418
    Abstract: A method produces a welded connection between first and second components each having inner and outer sides interconnected by an end face. The first component has a ferritic basic body carrying a plating at the inside and having an end face with a buffer layer of Ni-based alloy. The second component is of austenitic material. The end faces of the components enclose a weld groove. An austenitic root, connecting the plating to the end face of the second component, is welded in the weld groove. An intermediate layer of a nickel alloy having at least 90% nickel is welded onto the root. The intermediate layer is connected to the end faces of the plating and the second component. A weld seam is then produced in the remaining weld groove using a nickel-based welding additive. A method for repairing a welded connection between first and second components is also provided.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: May 20, 2014
    Assignee: Areva GmbH
    Inventors: Erhard Brueckner, Gerhard Engelhard, Siegried Guegel
  • Patent number: 8669490
    Abstract: A method and apparatus for multi process welding includes providing a controlled short circuit output and a pulse output in response to a user selection across a workpiece output stud and a torch output stud.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: March 11, 2014
    Assignee: Illinois Tool Works Inc.
    Inventors: Todd E. Holverson, Richard M. Hutchison, James L. Uecker
  • Patent number: 8653400
    Abstract: The present invention provides a high strength welded steel pipe superior in weld zone embrittlement crack characteristics and a method of production of the same, that is, a method of production of a welded steel pipe superior in hydrogen embrittlement cracking resistance of weld metal characterized by seam welding from the inner and outer surfaces by a tensile strength of 850 MPa or more, then expanding or reducing the size of the pipe for correction, which method of production of welded steel pipe characterized in that the hydrogen concentration of the preceding weld metal is 0.2 cc or less per 100 g at ordinary temperature.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: February 18, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Eiji Tsuru, Takuya Hara, Hitoshi Asahi, Hiroshi Morimoto, Yoshio Terada, Tatsuya Yoshida, Kouichi Shinada
  • Patent number: 8647731
    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.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: February 11, 2014
    Inventor: Michael Hacikyan
  • Patent number: 8610023
    Abstract: A method and apparatus for manufacturing an exhaust pipe assembly which are capable of decreasing a temperature difference between a seam-welded outer and inner surface at the time of seam welding. The apparatus comprises an outer circumferential electrode wheel abutted on an outer circumference of a mounting ring, a pressing means pressing the outer circumferential electrode wheel to the mounting ring, an inner circumferential electrode wheel abutted on an inner circumference of a pipe making up an exhaust pipe assembly, a transformer serving as a voltage supply means for supplying a predetermined voltage to the outer and inner circumferential electrode wheels and, and a controller for controlling voltage of the transformer. Thickness T1 of the outer circumferential electrode wheel is larger than thickness T2 of the inner circumferential electrode wheel.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: December 17, 2013
    Assignee: Honda Motor Co., Ltd
    Inventor: Shoichi Nakajima
  • Patent number: 8578608
    Abstract: A rod-based well screen is formed in place on a perforated pipe base by wrapping wire around the pipe base and a plurality of rods located around the outside of the pipe. The wire is welded sequentially to each individual rod as it is wrapped around the pipe. The welding and ground electrodes engage the wire and the rods respectively. The rod engaging ground electrode is positioned a short distance ahead of the wire being wrapped around the rods and the pipe base. The ground electrode includes a plurality of contacts. Each contact is mounted to pivot toward and away from a rod. Springs urge each contact toward a rod to hold the rod against the outside surface of the pipe base and to maintain good electrical contact between the contact and the rod. Each contact has a groove to guide the rod into position for welding to the wire.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: November 12, 2013
    Assignee: Schlumberger Technology Corporation
    Inventor: Kjartan Roaldsnes
  • Publication number: 20130256275
    Abstract: When a UOE steel pipe 30 is manufactured by subjecting a thick plate 7 provided with bevels 8a and 8b in edge parts 7a and 7b to C-pressing, U-pressing, and O-pressing to be formed into an open pipe 13, and butting and welding the bevels 8a and 8b of the open pipe 13 together, the shape of the bevels 8a and 8b of the thick plate 7 is measured prior to the C-pressing by a bevel-shape measurement device 6. A determination is made based on the measurement result whether there is a need for modifying the shape of the bevels 8a and 8b of the thick plate 7 before the C-pressing is started. The need for modifying the shape of the bevel can be quickly outputted to an operator.
    Type: Application
    Filed: September 18, 2012
    Publication date: October 3, 2013
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventor: Yasushi WATANABE
  • Publication number: 20130248493
    Abstract: The invention relates to a method for connecting two components by TIG welding, said components consisting of an air-hardening steel alloy and, in particular, of the material T23 or T24. A joint 17 is produced between the components that are to be connected, said joint widening, in particular, from an inside toward an outside. First, a root layer is welded in the region of the inside. Subsequently, a fill layer adjoining the root layer is welded, so that the joint is at least 90% filled. Finally, a cover layer is welded onto the fill layer, whereby the welding parameters are prespecified in such a manner that a temperature in an optimizing temperature range is adjusted on the inside in the region of the root layer.
    Type: Application
    Filed: July 26, 2012
    Publication date: September 26, 2013
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: Andreas HELMRICH, Andreas KOPP, Keyfo YILDIRIM, Torsten BAUMGARTEN
  • Patent number: 8536479
    Abstract: A first tubular, inner radial annular seam is produced to weld together two hollow cylinders by narrow-gap tungsten inert gas arc welding. Narrow-gap metal gas-shielded arc welding is used to create another tubular, outer radial annular seam to further weld together both hollow cylinders. In this manner, the rotational axis of the rotor shaft remains vertically aligned throughout the entire production method of welding together the shaft parts. In this manner, the required production time can be advantageously reduced and the use of welding filler can be effectively decreased.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: September 17, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventor: Karl-Heinz Gunzelmann
  • Patent number: 8530791
    Abstract: This disclosure provides a joining area and method between copper and stainless steel or titanium, as well as the permanent cathode obtained, where said joining area is made of a first zone of a copper-nickel (Cu—Ni) alloy, an intermediate zone with a mostly nickel alloy or pure nickel and a second zone made of a stainless steel-nickel alloy, which is the result of the participating materials being cast in an arc welding process, for example TIG, MIG or manual arc using electrodes of nickel as welding contributor between said materials and their space arrangement, that is to say, leaving a separation between the materials when performing the welding process, thus ensuring as follows: a) greater tensile strength, b) a substantial improvement of corrosion resistance of the joint welding, and c) improvement of conductibility, which can be improved still further by modifying the straight design of the conducting bar by providing it with the “horn”-type shape.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: September 10, 2013
    Assignee: Industria Proveedora de Partes Metalurgicas Limitada
    Inventors: Antonio Carracedo Rosende, Horacio Rafart Mouthon
  • Patent number: 8519302
    Abstract: An electric arc welder for depositing weld metal along a groove between two edges of a metal workpiece where the welder comprises a first electrode driven by a first wire feeder toward a point in said groove, a second electrode driven by a second wire feeder toward the point and a main power source with a first output terminal connected to the first electrode and a second output terminal connected both to the second electrode and directly or indirectly to the metal workpiece to create a second electrode path and a workpiece path. The power source includes a high speed switching output stage for creating current with a selected AC waveform between the first and second output terminals where the waveform of the main power source is generated by a waveform generator controlling a pulse width modulator circuit to determine the current operation of the output stage.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: August 27, 2013
    Assignee: Lincoln Global, Inc.
    Inventors: Russell K. Myers, Timothy M. O'Donnell, Alonzo P. O. Yost
  • Publication number: 20130146566
    Abstract: A system and method to clad a surface of a pipe using a high intensity energy source and a hot wire consumable, where the hot wire consumable is heated to a temperature sufficient to melt the consumable in a molten puddle while preventing the creation of an arc between the consumable and the puddle.
    Type: Application
    Filed: February 1, 2013
    Publication date: June 13, 2013
    Applicant: LINCOLN GLOBAL, INC.
    Inventor: LINCOLN GLOBAL, INC.
  • Patent number: 8461470
    Abstract: In a laser machining apparatus that performs machining by a laser beam (4) emitted from a laser oscillator (1), the laser machining apparatus herein provided includes an aperture (5) placed in a light path of the laser beam (4) emitted from the laser oscillator (1) so as to block a perimeter portion of the laser beam (4) and to transmit a middle portion thereof, and a beam-power measurement sensor (6) for measuring beam power of a laser beam (20) transmitted through the aperture (5), whereby it utilizes that beam power of the laser beam transmitted through the aperture (5) significantly changes (the more degraded, the more the beam power rises) due to a degradation condition of an output mirror (2) when the output mirror in the laser oscillator (1) becomes in high thermal loading condition due to the laser beam with high beam power, so that the degradation condition of the output mirror (2) is determined.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: June 11, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenji Ito, Takamitsu Kimura, Osami Yamaoka
  • Publication number: 20130136540
    Abstract: A method of butt welding a first and second tubular to join them together, the tubulars being suitable for use in an underwater environment and normally being made from carbon steel and having a corrosion resistant alloy (CRA) provided on an internal face thereof, the method comprising: depositing from an external side of the first and second tubulars, a weld-filler material onto a butt joint between the first and second tubulars. Preferably the weld filler on the external side is a carbon steel weld filler and for the internal side is a CRA weld filler. In this manner sufficiently strong circumferential welds may be provided especially for CRA clad tubulars. A method of deploying the tubulars underwater and an apparatus comprising tubulars welded together is also disclosed.
    Type: Application
    Filed: April 26, 2011
    Publication date: May 30, 2013
    Applicant: SUBSEA 7 LIMITED
    Inventors: Richard Jones, Tony Clough
  • Patent number: 8436278
    Abstract: In a method for joining two, in particular rotationally symmetrical, metal parts (1, 2) by a tungsten inert gas (TIG) welding process, in a first step, the two metal parts (1, 2) to be joined are initially positioned relative to one another by a centering offset (7) in such a way that a narrow gap (4) is formed between them and a relief region (8) is created in the seam-bottom area. In a second step, the flanks (5, 6) of the metal parts (1, 2), which delimit the narrow gap (4), are joined together by welding beads (10) which fill the narrow gap (4), with a predetermined melt-through point (9) being formed. High-quality automatic welding is achieved in that the narrow gap (4) has a continuously constant width (a), in that the width (a) of the narrow gap (4) is selected such that the welding beads (10) lying one above the other each extend over the entire width (a) of the narrow gap (4), and in that the entire narrow gap (4) is filled with the welding beads (10) in fully automatic fashion.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: May 7, 2013
    Assignee: ALSTOM Technology Ltd.
    Inventors: Sorin Keller, Werner Balbach
  • Publication number: 20130037162
    Abstract: The present invention provides a thick welded steel pipe excellent in low temperature toughness in which contents of Mn and Mo satisfy (Expression 1) below, Pcm obtained by (Expression 2) below is 0.16 to 0.19, and a metal structure of a base material steel plate consists of ferrite being 30 to 95% in an area ratio and a low temperature transformation structure, and in a metal structure of a coarse-grained HAZ, an area ratio of grain boundary ferrite is 1.5% or more, the total area ratio of the grain boundary ferrite and intragranular ferrite is not less than 11% nor more than 90%, an area ratio of MA is 10% or less, and its balance is composed of bainite. 1.2325?(0.85×[Mn]?[Mo])?1.
    Type: Application
    Filed: September 13, 2011
    Publication date: February 14, 2013
    Inventors: Yasuhiro Shinohara, Takuya Hara, Naoki Doi, Eiichi Yamashita
  • Patent number: 8373083
    Abstract: The invention relates to a method for connecting thick-walled metal workpieces by welding. In order to create the weld joint, the cross-sections are provided with a maximum of three weld regions according to wall thickness, the welding being carried out by a combined use of welding methods: the first weld region (root) is welded by means of laser beam welding or hybrid laser-arc welding, the second weld region is welded by means of hybrid laser-arc welding, and the third weld region required occasionally depending on the thickness of the sheet metal is welded by means of hybrid laser-arc welding or simply arc welding. The invention also relates to a seam preparation corresponding to the respective welding method used.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: February 12, 2013
    Assignee: V & M Deutschland GmbH
    Inventors: Steffen Keitel, Jan Neubert, Wolfgang Scheller, Markus Liedtke, Christian Caesar
  • Patent number: 8367961
    Abstract: The invention relates to a ground peg (10) which is made from a steel tube (11) and comprises an upper cylindrical section (12), a lower section (16) that tapers towards the bottom to form a tip (14), and an external thread (26) that extends along at least part of the lower section (16) and is formed from a continuous sheet metal strip (28) welded onto an external surface (32) of the ground peg (10) by means of a continuous or regularly interrupted fillet weld (34). The external thread (26) has a nearly constant pitch (S) and slope (a) relative to a longitudinal axis (40) of the ground peg (10) along the entire length of the external thread (26). The invention further relates to a method or producing such a ground peg (10).
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: February 5, 2013
    Assignee: CORTEC GmbH
    Inventor: Stephan Rainer
  • Publication number: 20130019986
    Abstract: A method for protecting a welded pipe assembly from metal dusting and a welded pipe assembly suitable for performing the method. The welded pipe assembly comprises two pipes, weld material joining the two pipes and insulating material. The pipes are protected from metal dusting by a protective coating. The present invention is useful for conveying gases comprising carbon monoxide at temperatures greater than 425° C. while preventing metal dusting of the welded piping assembly.
    Type: Application
    Filed: August 5, 2011
    Publication date: January 24, 2013
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Larry Thomas Dorsch, William Robert Licht, David R. Kerstetter
  • Publication number: 20120298628
    Abstract: A method of laying a pipeline is described in which both internal and external weld passes are performed in order to weld together the pipe sections. The method includes arranging a pipe section adjacent to the end of a pipeline thereby defining a circumferential joint to be welded, performing an external weld pass, with for example GMAW—MIG torches, on the root of the joint to be welded during which weld material is deposited in the root of the joint to be welded, thereby forming a root weld, and then performing an internal weld pass, with for example a GTAW—TIG torch, on the root weld during which the root weld is melted and re-shaped. The method has particular application in relation to pipes clad with corrosion resistant alloy.
    Type: Application
    Filed: November 30, 2010
    Publication date: November 29, 2012
    Applicant: SAIPEM S.p.A
    Inventor: Jonathan Bowers
  • Publication number: 20120291907
    Abstract: A high-strength welded steel pipe is obtained by welding a seam weld portion of a steel plate that are formed in a pipe shape. In the high-strength welded steel pipe, a base metal of the steel plate includes, by mass %, C: 0.010% to 0.080%, Si: 0.01% to 0.50%, Mn: 0.50% to 2.00%, S: 0.0001% to 0.0050%, Ti: 0.003% to 0.030%, Mo: 0.05% to 1.00%, B: 0.0003% to 0.0100%, O: 0.0001% to 0.0080%, N: 0.006% to 0.0118%, P: limited to 0.050% or less, Al: limited to 0.008% or less, and the balance of Fe and inevitable impurities, Ceq is 0.30 to 0.53, Pcm is 0.10 to 0.20, [N]—[Ti]/3.4 is less than 0.003, the average grain size of the prior ? grains in heat affected zones in the steel plate is 250 ?m or less, and the prior ? grains include bainite and intragranular bainite.
    Type: Application
    Filed: February 4, 2011
    Publication date: November 22, 2012
    Inventors: Taishi Fujishiro, Takuya Hara, Yoshio Terada, Shinya Sakamoto, Hitoshi Asahi
  • Patent number: 8302310
    Abstract: A rod-based well screen is formed in place on a perforated pipe base by wrapping wire around the pipe base and a plurality of rods located around the outside of the pipe. The wire is welded sequentially to each individual rod as it is wrapped around the pipe. The welding and ground electrodes engage the wire and the rods respectively. The rod engaging ground electrode is positioned a short distance ahead of the wire being wrapped around the rods and the pipe base. The ground electrode includes a plurality of contacts. Each contact is mounted to pivot toward and away from a rod. Springs urge each contact toward a rod to hold the rod against the outside surface of the pipe base and to maintain good electrical contact between the contact and the rod. Each contact has a groove to guide the rod into position for welding to the wire.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: November 6, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Kjartan Roaldsnes
  • Publication number: 20120261387
    Abstract: In a method for producing welded helical seam tubes having optimized tube geometry a metal strip is helically formed into an open seam tube by means of a forming unit and the converging strip edges are welded together, wherein an actual diameter determined on the welded tube is compared with a specific target diameter and a possible deviation lying outside a tolerance threshold is used to correct the actual tube diameter, wherein the strip edges are completely welded in a two stage step, including tack welding as a first step immediately after the shaping to form an open seam tube and thereafter final welding as a second step. The tube diameter is measured after the complete shaping to form an open seam tube and before the final welding. For this purpose, the diameter measuring device is arranged in such a way that either the completely shaped open seam tube or the only tack-welded tube is measured.
    Type: Application
    Filed: August 26, 2010
    Publication date: October 18, 2012
    Applicant: Salzgitter Mannesmann Grossrohr GmbH
    Inventors: Carsten Holste, Franz Martin Knoop
  • Publication number: 20120255933
    Abstract: There is provided a high power laser tool system for transmitting and delivering high power laser energy within the interior of pipes, which includes a high power laser-pig and long distance high power optical tether. The high power laser system performs high power laser pigging operations and other operations, such as, cleaning, assembling, maintaining and monitoring of pipelines.
    Type: Application
    Filed: February 6, 2012
    Publication date: October 11, 2012
    Inventors: Ryan P. McKay, Charles C. Rinzler, Joel F. Moxley, Paul D. Deutch, Mark S. Zediker, Ronald A. Dewitt, Brian O. Faircloth
  • Patent number: 8278583
    Abstract: In order to evaluate the welding current for the resistance seam welding of an overlap seam of container bodies, a welding with changing welding current intensity is carried out for a container body of the production series, resulting in a changing welding of the seam, ranging from the welding with a too high temperature to the welding with a too low temperature. The electric energy for this welding is determined several times during this welding and/or the temperature of the weld seam is determined several times and the welding current intensity is determined at which the welding of the individual container body is too cold and the welding current intensity at which the welding is too hot. This determination is based on the determined electric energy values and/or on the determined temperature values and based on this determination a preferred range for the welding current intensity within these limits of too hot and too cold is determined.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: October 2, 2012
    Assignee: Soudronic AG
    Inventors: Willi Mueller, Daniel Dietrich
  • Patent number: 8217295
    Abstract: A method produces a welded connection between first and second components each having inner and outer sides interconnected by an end face. The first component has a ferritic basic body carrying a plating at the inside and having an end face with a buffer layer of Ni-based alloy. The second component is of austenitic material. The end faces of the components enclose a weld groove. An austenitic root, connecting the plating to the end face of the second component, is welded in the weld groove. An intermediate layer of a nickel alloy having at least 90% nickel is welded onto the root. The intermediate layer is connected to the end faces of the plating and the second component. A weld seam is then produced in the remaining weld groove using a nickel-based welding additive. A method for repairing a welded connection between first and second components is also provided.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: July 10, 2012
    Assignee: Areva NP GmbH
    Inventors: Erhard Brückner, Gerhard Engelhard, Siegfried Gügel
  • Patent number: 8207468
    Abstract: A welding apparatus of a stainless steel pipe comprises a welding torch jetting argon gas for shielding oxygen into a gap of the steel pipe rolled in a circular shape, while fusing any one of base metal and a welding material; and a gas supply pipe installed inside the steel pipe, the gas supply pipe having a jetting nozzle which jets argon gas at a rate of 4 to 20 l/min toward the inner surface of a welding bead portion, where welding has been already completed and which is positioned backwardly at a predetermined distance from a welding bead portion where welding is being performed by the welding torch.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: June 26, 2012
    Assignee: Dong-A Flexible Metal Tubes Co., Ltd.
    Inventor: Jin Lim Choi
  • Patent number: 8129649
    Abstract: A method for Magnetic Arc welding for metallic materials wherein at least one of the workpieces to be welded has an open cross-section. The method comprises bracing the two workpieces and moving them together, wherein the open cross-section of one workpiece is bridged by a metallic auxiliary part to form a conducting closed region, and after the activation of a magnetic field of a magnet coil system and of the current required for welding, the workpieces are placed with a defined spacing and an electric arc is ignited, the magnetic field of the magnet coil system sets the electric arc in rotation in order to uniformly heat the end surfaces to be welded, and subsequently, the surfaces, which are to be welded, of the workpieces are pressed against one another.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: March 6, 2012
    Assignee: Georg Fischer Engineering AG
    Inventor: Thomas Lohken
  • Patent number: 8091201
    Abstract: A unique tubular work piece is disclosed along with a novel method and apparatus for manufacturing tubular work pieces from sheet metal stock lighter and stronger structures with less waste and less cost than prior methods.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: January 10, 2012
    Assignee: Middleville Tool & Die Co, Inc
    Inventors: Douglas M Johnson, Robert L Middleton, Sr., Robert L Middleton, Jr., Robert E. Leedy, John A. Nobel
  • Patent number: 8061582
    Abstract: A method of joining pipes (3) to produce underwater pipelines (2), wherein the facing free ends (15) of two adjacent pipes (3), aligned along an axis (A), are welded to define a cutback (18); a protective sheet (22) of plastic material is extruded close to the cutback (18); and the protective sheet (22) is wound about the cutback (18).
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: November 22, 2011
    Assignee: Saipem S.p.A.
    Inventor: Serafino Cittadini Bellini