Mandrels (e.g., Anvil) Patents (Class 219/160)
  • Patent number: 10576569
    Abstract: A retention clip used to retain workpieces during welding includes a spacer that extends along an axis and a plurality of first and second spring members positioned on opposite sides of the axis. The first spring members may be spaced apart from each other along the axis and configured to constrain a portion of a first workpiece between the first spring members and the spacer. And, the second spring members may be spaced apart from each other along the axis and configured to constrain a portion of a second workpiece between the second spring members and the spacer.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: March 3, 2020
    Assignee: Caterpillar Inc.
    Inventors: Matthew Behmlander, Michael Noble, Chad Kerestes
  • Patent number: 10443958
    Abstract: A manifold structure and method of forming a structure having at least one enclosed cavity includes using an ultrasonic additive manufacturing (UAM) process to build up a solid component, forming a cavity in the solid component, filling the cavity with a sacrificial material, using a UAM process to build up a finstock layer over the cavity filled with the powder material to enclose the cavity and form the enclosed cavity, and removing the sacrificial material from the enclosed cavity after the finstock layer is ultrasonically welded to the solid component. The sacrificial material has an adequate density to support the UAM process of forming the finstock layer over the cavity and the material may be removed from the enclosed cavity, resulting in an enclosed cavity having smooth surfaces with an optimal fluid flow area therethrough.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: October 15, 2019
    Assignee: Raytheon Company
    Inventors: Michael L. Andersen, Travis L. Mayberry, Gregory P. Schaefer
  • Patent number: 10393162
    Abstract: A manufacturing method for a joint part in which a first metal piece and a second metal piece are joined to each other by performing welding by irradiating a high-energy beam to a joint surface on which the first metal piece and the second metal piece face each other, the first metal piece including a first flow path for passage of a fluid provided at a specific depth from a surface on a side exposed to the high-energy beam, the second metal piece including a second flow path for passage of the fluid provided at a specific depth from the surface on the side exposed to the high-energy beam, and the first flow path and the second flow path being coupled to each other on the joint surface.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: August 27, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Takashi Iwama, Hiroyuki Ono, Takeshi Torii, Keisuke Nakashima, Yusuke Miyamoto, Tetsuya Aoyama
  • Patent number: 10265794
    Abstract: A method of manufacturing a container includes positioning metals plates against one another to define an interior space, filling the interior space with a granular refractory material and welding the seams between the plates to form a fluid tight container.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: April 23, 2019
    Assignee: CNH Industrial America LLC
    Inventor: Luca Negri
  • Patent number: 10239081
    Abstract: A self-propelled pipe lining system adapted to create an internal liner member on a pipe or other tubular structure, the system being the combination of a sprayer apparatus, an umbilical member connected to the sprayer apparatus and supplying the lining material, electrical power and communication, a plurality of propulsion devices mounted onto the umbilical member, and an accumulator reel for retaining the umbilical member. The spraying apparatus and propulsion devices are independently powered and controlled such that each may be accelerated or decelerated as required to maintain the sprayer apparatus at a constant speed during the application process. The propulsion devices are detachable from the umbilical member.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: March 26, 2019
    Inventors: Kent Weisenberg, Eric Hayes
  • Patent number: 9948051
    Abstract: The embodiments of disclosure disclose a welding tray, which includes a tray frame (18) and a supporting device (16), wherein the supporting device (16) includes a supporting component and an adjustable connecting component, the supporting component includes a supporting surface, the adjustable connecting component connects the supporting component to a side edge of the tray frame (18), and a distance between the supporting surface and a bearing surface of the tray frame (18) is adjustable.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: April 17, 2018
    Inventor: Yuwen Feng
  • Patent number: 9937576
    Abstract: A method for welding two or more conduits includes aligning end portions thereof in an abutting relationship to define a gap. The method includes performing a spatter free root weld along the gap to configure a root layer while the inner circumferential surface side is unobstructed. After the root weld is complete, an outward thrust is applied along the inner circumferential surfaces of the conduits. During the application of the outward thrust, a filler weld is performed along the gap to fill the gap and to facilitate shrinkage of the filler and root weld materials longitudinally and radially outward while preventing pressing out of the filler and root weld materials radially inward of the inner circumferential surface.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: April 10, 2018
    Assignee: ARVOS GmbH
    Inventors: Ari Becker, Andreas Bresinski
  • Patent number: 9808876
    Abstract: A stainless steel weldment and pad combined welding method includes steps of: (a) respectively processing and pairing butts of to-be-welded portions of two weldments, wherein, during pairing, inner walls of the two weldments are aligned at the same plane; the butts of the two weldments are opposed to form a V-shaped groove with an angle ?; and between bottoms of the butts of the two weldments is kept a gap L of 2-4 mm; (b) providing a copper pad at the gap between the bottoms of the butts of the two weldments, wherein the copper pad closely attaches to the inner walls of the two weldments; (c) welding the V-shaped groove to form a root pass; and (d) removing the copper pad, and filling the root pass to be welded into a cover pass.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: November 7, 2017
    Inventors: Jiewen Xia, Qingping Huang, Jialin Chen, Yuxian Su, Wenwei Li, Liyang Pang, Yan Wu
  • Patent number: 9266155
    Abstract: A super large diameter longitudinal welded pipe forming machine set comprises an edge hollow-bending device (1), a cage roll forming machine (2) and a plate-frame type forming machine (3), wherein the edge hollow-bending device (1) includes a machine seat (1.1), a pinch centring device (1.2) and a plurality of edge bending mechanisms (1.3); the cage roll forming machine (2) is an open cage roll forming machine combined by an outer roll device (2.1) and an inner roll (2.4); each equal rigid frame of the plate-frame type forming machine (3) includes a machine frame body (3.2), an upper horizontal roll mechanism (3.4), an upper horizontal roll adjusting mechanism (3.5), a sliding seat (3.10), a supporting plate (3.11), a hydraulic cylinder (3.12), a lower horizontal roll mechanism (3.6), a lower horizontal roll adjusting mechanism (3.7), a side vertical roll mechanism (3.8) and a side vertical roll adjusting mechanism (3.9).
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: February 23, 2016
    Inventors: Li Ma, Guohong Gao, Zhaokui Lang
  • Patent number: 8622277
    Abstract: Disclosed therein are an apparatus for and a method of automatically welding a flange to a guide thimble tube in a nuclear fuel assembly. The automatic welding apparatus includes: a welding part located on an axially conveying line of a tube for welding a welded surface of the tube inserted thereinto and a welded surface of a flange; a flange supplying part for supplying the flange at a tube inlet of the welding part onto the axially conveying line; and a conveying part mounted on the axially conveying line in such a way as to move the tube and the flange on the axially conveying line, so that they are inserted into and drawn from the welding part.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: January 7, 2014
    Assignee: Korea Nuclear Fuel Co., Ltd.
    Inventors: Ki-jun Kwon, Se-yong Shin, Sang-pil Kong, Hung-soon Chang, Jeong-ho Kim, Tae-hyung Na
  • Patent number: 8191754
    Abstract: A magnetic plug weld tool includes an arm, a copper alloy plate that is rotatably connected to one end of the arm, and a magnetic base that is connected to the arm. The arm is configured to apply a force to the copper alloy plate using the magnetic base.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: June 5, 2012
    Assignee: Durston Mfg. Co.
    Inventor: Donovan K. Norton
  • Patent number: 7909226
    Abstract: A method for producing a longitudinally welded hollow profile from a sheet metal blank having defined longitudinal edges, in which the sheet metal blank is initially preformed into an open seam profile with the aid of at least two tool parts allows for the economical production of accurately formed hollow profiles. This is achieved in that to produce the open seam profile, the sheet metal blank, by a change in the relative position of the tools parts, is placed freely around a mandrel positioned between the tool parts and extending in the longitudinal direction of the sheet metal blank, the outer shape of which mandrel determines the inner shape of the hollow profile to be produced, and in that the shaping of the open seam profile obtained is then completed in one or more stages in each case by a further change of the relative position of the tool parts.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: March 22, 2011
    Assignee: ThyssenKrupp Steel AG
    Inventors: Michael Br├╝ggenbrock, Thomas Flehmig, Wladimir Rituper, Mohamed Tohfa
  • Publication number: 20100018953
    Abstract: The present invention provides a reusable mandrel and method of using the mandrel in a SFFF process. A thermally conductive feature is located on the surface of the mandrel. The mandrel does not bond to the deposited part so that it may be easily removed without damaging either the mandrel or the deposited part. The present invention further enables the manufacture of components where the deposition surface is produced to precision, net shape geometries.
    Type: Application
    Filed: July 15, 2009
    Publication date: January 28, 2010
    Inventors: Vladimir Shapovalov, Roger S. Storm, James C. Withers, Raouf Loutfy
  • Patent number: 7631797
    Abstract: A magnetic based welding tool having an adjustment knob, a pivot arm, and a copper alloy pad, designed to assist with welding holes, for example, in sheet metal, that are to be welded closed with a MIG or TIG welder, by providing a backup to the hole, to keep the welding material from coming through the hole in excess amounts, and a magnetic base to hold the tool onto a ferrous metal panel, such as steel, with an adjustable arm to keep the copper alloy pad away from the magnetic base and in firm contact with the surface to be welded.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: December 15, 2009
    Assignee: Dueston Mfg. Co.
    Inventor: Donovan K. Norton
  • Patent number: 7520538
    Abstract: A purge gas introduction system for an orbital tube welding setup is provided, configured to inject high purity inert purge gas to the interior volume of a tube or tubular component. An o-ring is interposed between an annular base and an annular ring, their junction forming an annular o-ring groove, each part forming one sidewall, with the o-ring fully recessed within the groove, protecting the o-ring during the insertion and removal of a tube. The annular base and an annular ring are configured to receive a tube terminus. The sidewalls of the o-ring groove are divergent one to the other, wherein as the annular ring is drawn towards the annular base, the o-ring is forced partially out of the groove, forming a substantially leak tight seal between the tube and the o-ring. A purge gas from an external source is transmitted to the annular base through a purge connector, then, in turn, introduced to the interior volume of the tube.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: April 21, 2009
    Inventor: Kevin David McGushion
  • Patent number: 7332689
    Abstract: An apparatus for tacking a multi-lumen tubular assembly together comprises a laser, an optical member and a placement tray for retaining the tubular assembly. A portion of the optical member defines a window that is substantially transparent to laser energy emitted from the laser. The window has a substantially concave shaped surface. The placement tray and the window surface define a processing area for positioning at least a portion of the tubular assembly. The processing area receives the laser energy that is emitted from the laser and passed through the window of the optical member. The tubular assembly is defined by an outer tubular member disposed about at least a portion of at least one inner tubular member. The laser energy transmitted into the processing area is transmitted substantially through the outer tubular member and is substantially absorbed by at least one region of the least one inner tubular member.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: February 19, 2008
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Steven P. Mertens, Afsar Ali, Thomas J. Holman, Leo M. Klisch
  • Publication number: 20040079737
    Abstract: A patterned sheet having two long sides is wrapped around a mandrel. The mandrel is provided with at least one flat surface. The long sides of the sheet are secured adjacent to the flat surface of the mandrel and points along the long sides of the sheet are connected by laser welding or other connecting means. The laser beam is directed substantially perpendicular to the welding plane of the points to be welded, even if the weld points do not all lie on a single line parallel to the mandrel's longitudinal axis.
    Type: Application
    Filed: October 25, 2002
    Publication date: April 29, 2004
    Inventor: Gregory Pinchasik
  • Patent number: 5811756
    Abstract: When aluminum members are arc welded at a welding speed of 2-7 minute, a quantity of input energy is remarkably reduced so as to form a welded joint free from deformation or strains. A weld bead with sufficient penetration is formed due to the high thermal conductivity of the aluminum material. The penetration is promoted by jagging the groove face. The heat balance between the aluminum members different in heat capacity from each other is stabilized by holding a jig having big heat capacity in contact with the aluminum member having smaller heat capacity, so that a good weld joint can be obtained regardless of the difference in heat capacity.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: September 22, 1998
    Assignee: Nippon Light Metal Company, Inc.
    Inventors: Motoshi Horita, Harumichi Hino, Masayuki Kobayashi
  • Patent number: 5734142
    Abstract: A method of flash/butt welding an aluminum bicycle wheel rim, in which an aluminum sleeve having a dielectric anodized hardcoat surface finish is inserted into the center of the rim in order to support the interior walls of the rim during the welding process, is disclosed. The walls of a wheel rim or other similar metal profile defines an inner space in a tubular section of the rim. The sleeve is partially inserted into a first end of the rim and partially inserted into a second end of the rim. During the welding process, an electric current flows across a small space or gap between the two ends. The electric current melts the ends, at which time the two ends are pressed together in order to forge them into a single piece. The metal sleeve supports the inner walls of the profile in order to prevent collapse of the wall during welding. Due to the dielectric coating, the sleeve does not affect the welding circuit.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: March 31, 1998
    Assignee: Trek Bicycle Corporation
    Inventor: John Kazmierczak
  • Patent number: 5726408
    Abstract: A tube such as a nozzle to be repaired or tubular sections to be repaired or connected to each other, are welded using a backing ring having a groove in the area to be welded. The groove forms a purge space for purge gas between the ring and the tube to establish an inert atmosphere on both inner and outer surfaces of the tube during the welding operation. The ring is removed by making a bore in the ring having a diameter larger than the diameter of the groove but smaller than the diameter of the ring. In this way, the ring is divided into two portions which are easily removed from the tube.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 10, 1998
    Assignee: The Babcock & Wilcox Company
    Inventor: Arvid D. Easterday
  • Patent number: 5451741
    Abstract: The invention provides a backing strip for welding technology which can be adapted to a large variety of welding methods and applications and is fully effective also in non-horizontal positions. This is obtained in that the more easily meltable forming layer (1) and the less easily meltable base layer (2) of a flexible thread structure of inorganic fibers are connected to form a flat band by binding the threads (10;20) into a two-layered unitary fabric structure.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: September 19, 1995
    Assignee: Leslot Industriebedarf GmbH
    Inventors: Jurij V. Doronin, Anatolij I. Retschkin
  • Patent number: 5450996
    Abstract: This seamer (10) with back-up assembly (50) includes a first table (30) supporting one of the workpieces W1, a second table (32) supporting the other of the workpieces W2, fingers (40, 42) clamping the workpieces to the table, and an improved back-up assembly (50) disposed between the first and second table (30, 32). The back-up assembly (50) includes an elongate back-up bar (52), a holder (54) carrying the back-up bar (52), a support (70) disposed in spaced relation from the holder (54), inflatable hoses (80, 82) operatively disposed between the holder (54) and the support (70), and a control system (88) inflating the hoses to adjust the elevation of the back-up bar (52) relative to the workpieces W1 and W2. The assembly (50) is slidingly removable as a unit to facilitate removal of the back-up bar (52).
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: September 19, 1995
    Assignee: Pandjiris, Inc.
    Inventors: Norman R. Helton, Steven F. Joyce, Thomas L. Robinson
  • Patent number: 5323950
    Abstract: A backup mandrel apparatus to engage the inner surface of a metal tube being welded to support the weld bead and to keep a molten weld puddle from sagging and falling through the tube wall during welding. The apparatus includes a flexible inflatable bladder surrounded by a split expandable mandrel, an expandable band typically surrounding a central portion of the split expandable mandrel, insulation pads surrounding the mandrel adjacent to the expandable band and insulation material covering the inflatable bladder. The insulation pads preferably have a compressed thickness slightly greater than the band thickness. This assembly is inserted within the tubular workpiece to be welded. In use, the inflatable bladder is inflated with low air or water pressure to expand the mandrel to uniformly expand the expandable band to press the insulation pads against the inner side of the tubing workpiece being welded while leaving either no gap or a narrow gap between the band and the inner tube wall surface.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: June 28, 1994
    Assignee: General Dynamics Corporation, Space Systems
    Inventor: Octavio L. Mamon
  • Patent number: 5256847
    Abstract: A chamber includes a plurality of chamber elements, forming a chamber having a bottom, sides, ends and an open top, and a support wire for flexibly linking the chamber elements.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: October 26, 1993
    Assignee: Intevep, S.A.
    Inventor: Miguel A. Aleman R.
  • Patent number: 5175411
    Abstract: A method for welding a structure containing a gap which is exposed on either side of the gap is disclosed. The method is ideally suited for welding the gap which exists between the inner cylinder and nozzle chamber of a steam turbine during manufacture and repair. The method is accomplished by applying a refractory material into one side of the gap, preferably with the aid of gravity while the structure is inverted. When the refractory material is in place, the gap is welded. Upon completion of the welding procedure, the refractory material is preferably removed. In accordance with the present invention, a substantially uniform weld can be made upon a gap which is exposed on either side without the need for a controlled precision initial root weld.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: December 29, 1992
    Assignee: Westinghouse Electric Corp.
    Inventor: Ralph R. Barber
  • Patent number: 5158225
    Abstract: A hand held backing plate tool for the welding repair of holes in sheet metal panels includes a demountable backing plate which may be selected with a size and shape adapted to fit the contour of the panel adjacent the hole to be repaired. The selected backing plate is demountably attached to an insulated handle for convenient positioning by the repairman during repair. The backing plate is made of a copper base alloy to which welding metal will not adhere. The handle is made of a lightweight aluminum core including a heat transfer barrier and the outer surface of the handle is covered with an insulated hand grip. In an alternate embodiment, a mounting block is attached to one jaw of a C-clamp adjustable locking wrench to which the same variety of packing plates may be demountably attached. The locking wrench allows clamping the backing plate in position in some applications.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: October 27, 1992
    Inventors: Robert G. Ksioszk, Steven W. Gundrum
  • Patent number: 5110031
    Abstract: For internally supporting the annular weld during welding together of two pipe ends of two pipes extending mutually in line a weld supporting ring is used consisting of ring pieces comprising at least one supporting body of ceramic material bounding the outer periphery of the weld supporting ring.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: May 5, 1992
    Assignee: Atlantic Point Inc.
    Inventor: Fernando Rinaldi
  • Patent number: 4892993
    Abstract: In a system for welding thin section aluminum castings to elongated sections of thin walled hollow aluminum extrusion, an expandable mandrel specific to the weldment to be assembled serves also as a holder and positioner while welding is in progress. A powered carriage rotatably supports the normally cantilevered mandrel and advances it into position in the bore of the extrusion. Sets of hydraulically powered expansion shoes of the mandrel are spaced along its length so as to register internally with the location of external weld joints between casting and extrusion. Selective independent actuation of shoes or sets of shoes applies outward pressure locally to remove distortions in the "as received" extrusion, so as to maintain consistent fit up between extrusion and casting, facilitating consistently good welded joints. This mechanical positioning and form control system lends itself readily to integration with robot welders for fully automated operation.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: January 9, 1990
    Assignee: Aluminum Company of America
    Inventor: Isreal Stol
  • Patent number: 4800250
    Abstract: A method and apparatus for guiding the opposed edges of sheet material into substantially abutting edge-to-edge relationship with one another and thereafter welding said edges by a high energy welding source to form a seam. The invention enables the continuous high speed butt welding of the sheet material to form cylindrical bodies. The apparatus includes three elements, a mandrel, a mandrel holder and tube holders. Sheet material is fed to around said mandrel and advanced by a tube holder with an edge of two opposite edges of said sheet material being in intimate contact with a basis plane of said mandrel holder. Another edges is slided into contact with above mentioned edge of sheet material making abutting relationship after passing through the basis plane of said mandrel holder. These abutting edges pass a high energy zone of a welder and butt welded to make a tube.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: January 24, 1989
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Michio Watanabe, Kazuhisa Ishibashi, Kenji Matsuno, Hideo Kurashima
  • Patent number: 4759981
    Abstract: A welding backup tape assembly includes a flexible, elongated, heat resistant ribbon, such as a metal foil strip, with a flexible, elongated, heat resistant, fibrous rope having a flexible reinforcing core, preferably metallic, attached to one major side of the ribbon, suggestedly by stitching with a glass fiber thread, to form a substantially unitary assembly. Pressure sensitive adhesive layers are applied to the ribbon on either side of the fibrous rope to allow that side of the assembly to be adhered to the weldable workpiece. In the preferred embodiment, the fibrous rope is formed by a knitted, multistrand stainless steel wire core supporting a sheath of knitted, texturized, untwisted fiberglass yarns. Untexturized, low or no twist, continuous, glass fiber thread is used to stitch the rope to the ribbon.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: July 26, 1988
    Assignee: Davlyn Manufacturing Co., Inc.
    Inventor: Thomas L. Weil
  • Patent number: 4722711
    Abstract: A method and an apparatus for position orienting a base assembly of a metal halide lamp is describe for maintaining the curved arc tube in the upward position when the lamp is inserted in a socket. Once the lamp has been fully assembled and sealed a locator structure is attached to the base shell in order to create a base assembly which will properly position the lamp when it is in the socket. The welding apparatus of the present invention resistance welds the locator structure onto the base shell once the locator structure has been aligned approximaely 90 degrees counterclockwise from the tip of the curved portion of the arc tube when viewed from the dome end of the lamp. The lamp resulting from the method and use of the apparatus will be more inexpensive and will not have the problems of a loose base or a cracked seal.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: February 2, 1988
    Assignee: GTE Products Corporation
    Inventors: Ronald C. Lekebusch, John T. O'Neil, Jr., Martin E. Muzeroll
  • Patent number: 4723064
    Abstract: A purge gas system for welding pipes having a flat circular plate with a flat gasket adapted to engage the end of a pipe section and a pair of toggle joints positioned inside the end of the pipe and formed to have their knuckles press outwardly against the interior surface of the pipe upon rotation of a thumbscrew threadably engaged on a tube passing through the center of the plate, the tube being hollow for supplying purge gas and for permitting removal of ambient atmosphere displaced by the purge gas.
    Type: Grant
    Filed: August 2, 1986
    Date of Patent: February 2, 1988
    Inventor: Bill A. Bothe, II
  • Patent number: 4719329
    Abstract: A can body of surface treated steel plate, such as TFS, having adjacent longitudinally extending edges of tubular shaped member welded by irradiation of laser beam and provided with inside surface of welded seam having reliable paint retaining characteristic and free from projections, such as upset. For the purpose, welding is carried out such that inside and outside width of molten-solidified zone and structure changed zone will be maintained within a predetermined range and that metallic wire or elongated backing strip is located oppositely to lower surface of both edges being butt-welded.
    Type: Grant
    Filed: August 13, 1986
    Date of Patent: January 12, 1988
    Assignee: Toyo Seikan Kaisha, Limited
    Inventors: Kenji Matsuno, Hiroshi Matsubayashi, Kazuhisa Ishibashi, Kazuma Kuse, Nobuyuki Sato
  • Patent number: 4682724
    Abstract: A welding backup shoe apparatus that comprises a double-acting fluid cylinder having a piston rod extending from it. A first retainer shoe is attachable to the piston rod and a second retainer shoe is opposed to the first retainer shoe. A first backup shoe to be received by the first retainer shoe and at least two other backup shoes are received by the first retainer shoe and by the second retainer shoe. The backup shoe is arcuate externally to be a close fit within a pipe. A guide is attached to the first retainer shoe, slidably engaging the second retainer shoe to guide the movement of the retainer shoes relative to each other. A release device is attached to the cylinder to abut the first backup shoe; and cables attach the two other backup shoes to the cylinder.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: July 28, 1987
    Inventor: Helmut Hahn
  • Patent number: 4611751
    Abstract: The invention comprises a method and an apparatus for the manufacture of cylindrical hollow bodies by the shape welding process. This apparatus comprises a connection between a rotatably mounted supporting body which can be driven and a base body onto which the weld material is deposited. This connection is effected by elastically deformable elements and is capable of changing in the radial direction. Metal profiles which can be deformed elastically are fastened, in a manner permitting detachment, to the periphery of the supporting body, spaced at regular intervals. The base body is composed of a metal sheet or strip which is wrapped around the profiles and attached to them in a manner permitting detachment. Preferably the profiles extend over the length of the supporting body. The deformable metal profiles may be designed as cylindrical tubes, without any discontinuities or as half-tubes, angle-profiles, Z-profiles, or corrugated-sheet profiles.
    Type: Grant
    Filed: January 11, 1984
    Date of Patent: September 16, 1986
    Assignee: Thyssen Aktiengesellschaft
    Inventors: Herbert Luckow, Ulrich Plantikow, Siegfried Grone
  • Patent number: 4493966
    Abstract: An internal mandrel (22) cooperating in the operation of joining two successive lengths of tubing by welding, and it is characterized in that this mandrel comprises zones (25, 26, 27) separated longitudinally and serving respectively for matching, welding, and welding checking, and means of displacement of the mandrel (22) by a step, enabling the latter to present the said zones in succession in front of one and the same working station.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: January 15, 1985
    Assignee: Compagnie Francaise des Petroles
    Inventors: Bruno de Sivry, Bernard Sudreau, Michel Jegousse, Yves Le Hir
  • Patent number: 4493963
    Abstract: A method and machine for weld cladding, particularly for welding material to a cylindrical plate, such as hardfacing or corrosion resistant alloys normally applied as claddings. The machine has a mandrel extending from it for supporting and rotating the plate. The mandrel is supported by beams and driven either by hand or by a motor. Rotating the mandrel rotates the plate supported on the mandrel through the path of a welding apparatus. Flanges can be provided to hold the plate on the mandrel. Bearings can be provided in the beams to facilitate the rotation of the mandrel.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: January 15, 1985
    Inventor: Roman Arnoldy
  • Patent number: 4450338
    Abstract: A method of fabricating a truss core sandwich panel of the type including first and second face sheets secured on opposite sides of a corrugated sheet. The first face sheet is welded to one side of the corrugated sheet and the second face sheet is positioned in contact with the other side of the corrugated sheet. A conductive mandrel is positioned between the first face sheet and the corrugated sheet, the height of the mandrel being less than the distance between the first face sheet and the corrugated sheet by a predetermined amount. The first and second face sheets are positioned between opposed welding electrodes, with the mandrel being coplanar with the electrodes. A welding force is applied to the first and second face sheets by means of the electrodes, the force being sufficient to deflect the first face sheet into contact with the mandrel and to bring the mandrel into contact with the corrugated sheet to permit electrical continuity between the electrodes.
    Type: Grant
    Filed: May 4, 1982
    Date of Patent: May 22, 1984
    Assignee: TRE Corporation
    Inventor: Charles E. Conn, Jr.
  • Patent number: 4436979
    Abstract: An apparatus for continuous laser welding adjacent longitudinally extending of generally tubular shaped members is disclosed. The apparatus comprises a Z-bar guide for positioning and guiding the edges as they are moved toward a welding area with a laser welding device for welding the edges, and a mandrel connected to the Z-bar guide and extending internally and in the direction of movement of the members. The mandrel includes a laser beam dump positioned adjacent the welding area for absorbing light from a laser beam produced by the laser welding device and at least one roller for internally supporting and guiding the generally tubular shaped members.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: March 13, 1984
    Assignee: SWS, Incorporated
    Inventor: Carl J. Nilsen
  • Patent number: 4420672
    Abstract: A method and apparatus for producing electroslag T-joints where fillets are required is provided by utilizing a water-cooled copper shoe with a slag relief notch placed along the weld joints to provide a dam for the fillet material; the location of the slag relief notch in the shoes of various radii is determined according to a precise formula which provides the required results.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: December 13, 1983
    Assignee: Allis-Chalmers Corporation
    Inventor: James R. Nolt, Jr.
  • Patent number: 4420676
    Abstract: An apparatus for safeguarding a welding pool in mechanized welding in a constrained position, for example a vertical position, comprises sliding blocks pressed against the surfaces of the work pieces to be welded and supplying the welding current and the welding electrode and moving at the welding rate. The sliding blocks comprise two segments which are closely adjacent in the perpendicular center plane of the welding gap between the work pieces and are mutually movable. The sliding block segments are pressed in a yielding manner against the surface of each work piece and are individually and independently movable.
    Type: Grant
    Filed: April 28, 1981
    Date of Patent: December 13, 1983
    Assignee: Friedrich Eichhorn
    Inventors: Peter Hirsch, Bernhard Wubbels, Iwar Thomson
  • Patent number: 4387845
    Abstract: The apparatus of the present invention is used for holding and cooling a metal tube during welding. The tube has a cylindrical bore of predetermined diameter extending therethrough. The apparatus comprises a cylindrical mandrel having a bore extending axially therethrough. The bore has a central portion of reduced diameter and has outwardly tapering portions at its opposite ends. The mandrel also has a plurality of elongated axially extending slots formed in the walls of the mandrel so as to permit the mandrel to expand radially outwardly. Cam means are positioned within the mandrel bore and are adapted to be moved to cause outward radial expansion of the mandrel. The method of the present invention comprises placing the mandrel within the cylindrical bore of the metal tube, and expanding the mandrel radially outwardly against the inner surface of the metal tube, so as to hold the tube in place and cool it during welding.
    Type: Grant
    Filed: October 30, 1980
    Date of Patent: June 14, 1983
    Inventor: Roy J. Mefferd
  • Patent number: 4383356
    Abstract: A method and apparatus for making packets of rotor or stator sheets for electrical machinery. At a certain station to which a preselected number of sheets are delivered, the sheets are both aligned and joined together. Aligning is effected by an aligning device which includes aligning pins which move into openings in the sheets. While the sheets are still at the aligning station, joining means effect joining together of the sheets. The joining means may include a piston pressed into the opening in the sheets and/or a device for welding the sheets together. At a packet receiving station before the aligning and joining station relatively high stacks of sheets are placed into magazine baskets suspended from a central turntable member. A piston pushes a predetermined number of such sheets upwardly through its respective basket into a receiving head which carries those sheets to the aligning and joining station. The finished packets are then carried by the aligning joining means to a discharging station.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: May 17, 1983
    Assignee: Balzer and Droll KG
    Inventor: Karl-Heinz Fichtner
  • Patent number: 4363954
    Abstract: A device for the back support of the first run weld in the automatic butt-welding of two pipes held together by the two circumferential facing sets of radial pistons of an internal connection. The connector includes a set of independent copper pads of trapezoidal shape disposed in the form of a ring and fixed, with their bases alternately inverted, on a corresponding underlying set of pad support elements idly supported by respective horizontal pins rigid with support blocks which are resiliently supported by one of said circumferential sets of radial pistons of said internal connector by means of radial thrust springs. The pads are kept resiliently and constantly pressed against each other in the manner of a ring along their inclined sides by respective horizontal thrust springs supported by said horizontal pins and acting alternately on opposite faces of said pad support elements.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: December 14, 1982
    Assignee: Saipem, S.p.A.
    Inventor: Fernando Rinaldi
  • Patent number: 4360141
    Abstract: A welding seam back-up structure for mounting on the backside of the adjacently positioned edge margins of work members or workpieces that are to be joined by a weld seam, in which an elongate back-up tape of fiberglass or other suitable material is retained in a position bridging the backside of the edges to be joined, by means of an extrusion back-up tape holding structure having high heat conductivity characteristics and in one form is fabricated with at least one surface recess for receiving the back-up tape, the recess having a central longitudinal generally arcuate groove for conforming the backside weld bead, and longitudinally extending heat radiating fins. In another form, the extrusion is provided with a cover which coacts with the fins to provide a flow passage for a coolant fluid. In another arrangement the extrusion is reversible and has back-up tape receiving recesses on opposite sides.
    Type: Grant
    Filed: September 2, 1980
    Date of Patent: November 23, 1982
    Inventor: Milo M. Kensrue
  • Patent number: 4348574
    Abstract: A dam, or barrier, structure is moved along the edge, or corner, of a workpiece to control the flow limits of molten material of arc welding. The dam structure provides a dimentionally stable groove at the edge of the workpiece surface into which is received granulated flux and positions the body of the flux along the edge, or corner, of the workpiece surface to function as a mold for the molten material, and, thereby, prevent the falling of the flowing material from the surface. The dam structure has the specific form of a continuous tread of segments which advances around parallel rollers to reform the retaining groove structure opposite the arc operation on the surface of the workpiece.
    Type: Grant
    Filed: June 13, 1980
    Date of Patent: September 7, 1982
    Assignee: Combustion Engineering, Inc.
    Inventors: John J. Barger, James R. Underwood
  • Patent number: 4344556
    Abstract: In welding metal sheets together from only one side, an improved welding backup tape is self-adhesively applied to insure the consistent formation of a smooth, inclusion free, slightly convex underbead which requires little or no dressing, or grinding, and which does not impede in any way the achievement of 100% radiographic weldment testing. This welding backup tape is made in one embodiment by mixing into solution two parts of a colloidal silica solution with one part of a titanium dioxide refractory coating solution. Applying this resulting solution as a refractory coating to the upper portion of an electrical grade, heat treated, braided, natural finish, finely woven, fiberglass material in a sleeving configuration.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: August 17, 1982
    Inventor: Donald K. Knapp
  • Patent number: 4337387
    Abstract: A section to aid in the welding of metal sheet, the section having a body portion forming part of the sheets, a projection extending from the body portion, which projection receives a strip of weld resistant material, which strip is to be located adjacent abutting edges of the strip.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: June 29, 1982
    Assignee: Hockney Engineering Pty. Ltd.
    Inventor: Philip K. Hockney
  • Patent number: 4326116
    Abstract: An apparatus comprising a case with a carriage mounted on horizontal guides thereof which carriage supports two brackets provided with contact clamps. Under the brackets there is mounted a bath containing a cooling medium. At least one of the brackets is movable and is resiliently pressed in the direction opposite to the second bracket. A rod of a power cylinder is in contact with the movable bracket which rod serves only to put the brackets closer. The contact clamps are provided with mandrels to be inserted into a tubular workpiece.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: April 20, 1982
    Inventors: Mikhail N. Bodyako, Georgy A. Semenjuk, Garik E. Zverkov, Stanislav A. Astapchik, Anatoly F. Kosov, Sergei M. Kashulin, Alexandr N. Baklanov
  • Patent number: 4321448
    Abstract: A welding method in which two metal bars are disposed such that the opposing ends of these bars are placed in a welding mold with a predetermined welding gap preserved therebetween, and are jointed to each other by filling the space formed between the opposing ends of the bars and the inner surface of the welding mold with a molten welding metal. Also, disclosed is a welding apparatus having a welding gap setting device for placing the metal bars with a predetermined welding gap therebetween and an arc welder for jointing the bars by filling the welding gap with molten welding metal.
    Type: Grant
    Filed: June 26, 1980
    Date of Patent: March 23, 1982
    Assignees: Kajima Corporation, Mitsui Engineering & Shipbuilding Co., Ltd.
    Inventors: Kaoru Shiozawa, Tsunebumi Matsunaga