Resistance Heating Methods Patents (Class 219/67)
  • Patent number: 10046473
    Abstract: An apparatus and method for manufacturing a notched corner board is disclosed. The method includes cutting bent board stock into fixed lengths; forming a slit in or near an end of the corner board; and bending/folding a part of the corner board between the end and the slit to create a notch or flap in the corner board. The apparatus includes one or more cutting tools configured to form a slit in or near a first end of the corner board, a support block configured to support the corner board as the slit is formed, one or more rollers configured to move the corner board towards the cutting tool(s), a frame to which the cutting tool(s), the support block, and the roller(s) are directly or indirectly attached, a motor, and a punch. The motor controls movement of the punch to form the notch in the corner board.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: August 14, 2018
    Inventor: Clyde Ulrich
  • Patent number: 9969072
    Abstract: A production method provides for punching holes in a metal strip, cold-forming the metal strip to form a guide tube, and joining the lengthwise edges of the metal strip to each other by a seam or teeth so as to create a uniform material. Subsequently, a piston-like striker is inserted into the guide tube.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: May 15, 2018
    Assignee: Hilti Aktiengesellschaft
    Inventor: Josef Fuenfer
  • Patent number: 9884387
    Abstract: A method and a device for inductive radiofrequency welding of metal products, include heating by inducing radiofrequency currents with use of at least one induction conductor. The metal products and a welding zone are moved relative to one another, so that edge regions of the metal products to be welded are brought in contact in the welding zone and are welded together to form a weld seam. Metal products with different material thicknesses and/or material properties can be welded together because an induction conductor which heats the edge regions of the metal products is used which includes at least two mutually separable induction conductor components that are assigned to the respective metal product and are adapted thereto, and the edge regions to be welded are heated in a manner that is adjusted separately for the respective metal product.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: February 6, 2018
    Assignee: WISCO Tailored Blanks GmbH
    Inventors: Jens Plha, Martin Koch, Stefan Wischmann, Bernhard Nacke, Alexander Nikanorov, Holger Schülbe, Mario Schmidt, Henning von Löhneysen
  • Patent number: 9109884
    Abstract: A method for manufacturing an electric resistance steel pipe having a good toughness at a welded portion is provided, the method being capable of stably manufacturing an electric resistance welded steel pipe having a desirable toughness at a welded portion although a steel strip serving as a base material has a dimensional variation. Groove shapes and are applied to edges and of an open pipe, an edge shape monitor continuously captures images of the edges and immediately before electric resistance welding, and the captured images are input to an arithmetic processing unit for image processing.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: August 18, 2015
    Assignee: JFE Steel Corporation
    Inventors: Tomohiro Inoue, Shigeto Sakashita, Daijiro Yuasa, Hiroyasu Yokoyama, Kazuhito Kenmochi, Yukinori Iizuka
  • Publication number: 20150083266
    Abstract: A high-strength thick-walled electric resistance welded steel pipe has excellent low-temperature toughness and excellent HIC resistance and a yield strength of 400 MPa or more. The steel has a chemical composition consisting of C: 0.025% to 0.084%, Si: 0.10% to 0.30%, Mn: 0.70% to 1.80%, controlled amounts of P, S, Al, N, and O, Nb: 0.001% to 0.065%, V: 0.001% to 0.065%, Ti: 0.001% to 0.033%, and Ca: 0.0001% to 0.0035% on a mass percent basis and the remainder being Fe and incidental impurities, and satisfies Pcm of 0.20 or less.
    Type: Application
    Filed: April 11, 2013
    Publication date: March 26, 2015
    Applicant: JFE Steel Corporation
    Inventors: Shunsuke Toyoda, Sota Goto, Takatoshi Okabe, Tomohiro Inoue, Motoharu Egi, Atsushi Yonemoto
  • Publication number: 20150068638
    Abstract: A low-yield ratio high-strength electric resistance welded steel pipe has a yield ratio of 80% or less and a TS of 655 MPa or more. A steel material has a composition containing 0.38% to 0.45% C, 0.1% to 0.3% Si, 1.0% to 1.8% Mn, 0.03% or less P, 0.03% or less S, 0.01% to 0.07% sol. Al, and 0.01% or less N on a mass basis.
    Type: Application
    Filed: April 9, 2012
    Publication date: March 12, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Yasuhiro Matsuki, Tomohiro Inoue
  • Patent number: 8957343
    Abstract: Provided is an electrode support structure in which local heating can be prevented from occurring in a workpiece during the electric heating. The electrode support structure is usable for applying a load to the electrodes used for the electric heating of a metal plate, and comprises at least two members, i.e., a first member to which the electrodes are fixed and a second member which receives the load from the first member or connects the first member to a load means. The support structure in which the two members are joined to each other through an elastic member can uniformly apply the load to the electrodes for electric heating so that the electrodes can uniformly contact with the workpiece, whereby the workpiece can be uniformly heated.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: February 17, 2015
    Assignee: Aisin Takaoka Co., Ltd.
    Inventors: Katsunori Ishiguro, Masaki Furuhashi
  • Patent number: 8890027
    Abstract: An object to be processed 1 is irradiated with laser light L with a standard pulse waveform, so as to form a molten processed region 131, which has a larger size in the thickness direction of the object 1 and is easy to generate a fracture 24 in the thickness direction of the object 1, within a silicon wafer 111, and with laser light L with a retarded pulse waveform, so as to form a molten processed region 132, which has a smaller size in the thickness direction of the object 1 and is hard to generate the fracture 24 in the thickness direction of the object 1, within a silicon wafer 112.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: November 18, 2014
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Fumitsugu Fukuyo, Etsuji Ohmura, Kenshi Fukumitsu, Masayoshi Kumagai, Kazuhiro Atsumi, Naoki Uchiyama
  • Patent number: 8841573
    Abstract: Apparatus and methods for assembling solar receiving tubes in the field are described. In one embodiment, a welder is provided having longitudinally adjustable clamps that permit the easy restraining and adjustment of tube position for welding. In another embodiment, a system for moving along the length of a solar collector and sequentially welding tubes is described.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: September 23, 2014
    Inventor: David Buttress
  • 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: 8796579
    Abstract: A flange (13) for use in direct resistance heating of a glass-carrying vessel (10), such as a finer, is provided. The flange comprises a plurality of electrically-conductive rings which include an innermost ring (140) which is joined to the vessel's exterior wall (12) during use of the flange and an outermost ring (150) which receives electrical current during use of the flange. The innermost ring (140) comprises a high-temperature metal which comprises at least 80% platinum and the outermost ring (150) comprises at least 99.0% nickel. This combination of materials both increases the reliability of the flange and reduces its cost. In certain embodiments, the flange can also include one or more rings (190) composed of a platinum-nickel alloy which has a lower thermal conductivity than platinum or nickel and thus can serve to reduce heat loss through the flange.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: August 5, 2014
    Assignee: Corning Incorporated
    Inventors: Lee Martin Adelsberg, Steven Roy Burdette, Joyce C Gillis Dunbar, James Patrick Murphy
  • Publication number: 20140130562
    Abstract: A squeeze roll stand includes a combination of a fixed portion installed at a joint position of an electric resistance welded pipe manufacturing line, in which squeeze rolls excluding left and right upper rolls are detachably assembled, and a movable portion overlying the fixed portion, inside which left and right upper rolls are detachably assembled, the movable portion being inclined, taking a back surface downstream side as a fulcrum point, toward a same side from an assembling position on the fixed portion to a retreat position to open an upper part of the fixed portion. The movable portion is driven and reciprocated between the assembling position and the retreat position with cylinder type actuators as a drive mechanism. At the retreat position, the movable portion overlies a bead grinding device arranged on the back surface downstream side of the fixed portion with a front surface facing upward.
    Type: Application
    Filed: July 29, 2011
    Publication date: May 15, 2014
    Applicant: NAKATA MANUFACTURING CO., LTD.
    Inventors: Hiroaki Yabuta, Feizhou Wang, Satoshi Tsuruta, Shoji Shibata, Kunihiko Hatabara, Katsumi Fujino
  • 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: 20120279577
    Abstract: A flexible pipe which can be heated efficiently, and may therefore be used for conveying oil in cold regions, is provided. The pipe comprises in order from inside to outside: an interior lining; a wound tape; and at least one reinforcement layer. The wound tape contains a first exterior layer of a plastics molding composition that is not electrically conductive; an intermediate layer of an electrically conductive plastics molding composition; and a second exterior layer of a plastics molding composition that is not electrically conductive. A volume resistivity to IEC 60093 of the intermediate layer is in the range from 10?3 to 1010 ?m, and the intermediate layer comprises at least two metallic conductors embedded into the plastic molding composition along an entire length of the tape in such a way that, the two conductors do not touch one another.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 8, 2012
    Applicant: Evonik Degussa GmbH
    Inventors: Rainer GOERING, Andreas Dowe, Karl Kuhmann, Maximilian Gruhn, Juergen Franosch
  • Patent number: 8304683
    Abstract: A seam welding apparatus and a seam welding method perform a seaming process on workpieces of various shapes having flange sections, by preventing a welding track formed by upper and lower rotary electrodes from becoming displaced from a welding reference line established on the flange section. The seam welding apparatus includes two rotary electrodes for gripping the flange section therebetween while seam-welding the flange section, a support for synchronizing movements of the two rotary electrodes with each other in a widthwise direction of the flange section, a turning mechanism for pressing at least one of the two rotary electrodes toward the workpiece body, a roller that abuts against an end face of the flange section, and roller adjusting means for positionally adjusting the roller.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: November 6, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Eisaku Hasegawa, Shogo Matsuda, Takafumi Ikeda
  • 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
  • Publication number: 20120103942
    Abstract: A method of making a structural connection in a metallic tubular assembly is provided. It comprises providing a node having at least two legs and forming a radially extending rib extending from an exterior surface of each of the legs by deforming a corresponding interior portion of each of the legs. At least one tube is provided having a radially extending flange adjacent an open end. The tube is placed over the exterior surface of one of the legs abuts the radially extending flange and the radially extending rib. By applying opposing forces to one of the legs and one tube to hold the radially extending flange and the radially extending rib in abutting contact at a joint, resistance welding can take place at the joint when at least one electrode is applied to the joint.
    Type: Application
    Filed: October 22, 2009
    Publication date: May 3, 2012
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Andrzej M. Pawlak, Timothy C. Hays, Alain Piete
  • Patent number: 8083257
    Abstract: A closure assembly for an inflator comprises a housing and an outlet plate disposed within the housing. The outlet plate has an outlet opening configured to receive a burst disk. The outlet plate is joined to the housing by a deformation resistance weld. The deformation resistance weld is formed by contacting the outlet plate with a first electrode, contacting an exterior portion of the housing with a second electrode, and applying a voltage through the first and second electrodes to adhere a portion of the housing to a portion of the outlet plate.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: December 27, 2011
    Assignee: Delphi Technologies, Inc.
    Inventors: Brian T. Finnigan, Venkatasubramanian Ananthanarayanan, James M. Payne, Donald E. Warren
  • Publication number: 20110272395
    Abstract: The present invention concerns a method for forge welding of tubes, rods, bolts or other axial symmetrical profiles. According to the methods the profile ends are formed by plastic deformation and/or machine cutting processes, such that they obtain a reduced cross section/thickness, the profile ends are locally heated electromagnetically by induction and/or direct high frequency resistance heating and profile ends are then pressed together. The forming step comprises given one of the profile ends a double arched shape. Preferably the other profile end is given a convex shape.
    Type: Application
    Filed: November 10, 2008
    Publication date: November 10, 2011
    Inventor: Per Thomas Moe
  • Publication number: 20110049106
    Abstract: Apparatus and methods for assembling solar receiving tubes in the field are described. In one embodiment, a welder is provided having longitudinally adjustable clamps that permit the easy restraining and adjustment of tube position for welding. In another embodiment, a system for moving along the length of a solar collector and sequentially welding tubes is described.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 3, 2011
    Inventor: David Buttress
  • Publication number: 20110011834
    Abstract: A method of producing coil plate on a hot strip mill is disclosed. The method includes coiling hot rolled coil plate strip at a temperature that is selected (a) to minimize precipitation of Cr/Mo carbides or (b) so that any Cr/Mo carbides that form are sufficiently fine that they go into solution in any subsequent heat treatment of coil plate made from the strip.
    Type: Application
    Filed: September 24, 2010
    Publication date: January 20, 2011
    Applicant: BLUESCOPE STEEL LIMITED
    Inventor: James Geoffrey Williams
  • Publication number: 20100104888
    Abstract: The present invention provides a method of production of electric resistance welded steel pipe able to stably reduce weld defects due to oxides by firing plasma and furthermore able to reduce plasma jet noise and comprises shaping steel plate 1 into a tube and electric resistance welding the abutting end faces 4 during which blowing on at least the abutting end faces 4a in the region 6 at the welding upstream side from the weld point 9 where the temperature becomes 650° C. or more a reducing high temperature (pseudo) laminar plasma obtained by applying voltage to a reducing gas containing H2 gas: 2 to 50 vol % to which is added a balance of Ar gas alone or a mixed gas of Ar gas to which N2 gas, He gas, or both are added. At that time, it is preferable to make the applied voltage over 120V and the make the plasma blowing conditions satisfy the following formula (1).
    Type: Application
    Filed: February 29, 2008
    Publication date: April 29, 2010
    Inventors: Hideki Hamatani, Shinji Kodama, Nobuo Mizuhashi, Sunao Takeuchi, Tomohiro Nakaji, Takashi Miyakawa, Hitoshi Asahi, Michitoshi Tanimoto, Michimasa Mukai
  • Publication number: 20100090453
    Abstract: Trailer for carrying a welding unit for butt-welding pipe portions, comprising a chassis with brackets for supporting and locking the body of a welding unit for butt-welding pipe portions, the chassis being provided with at least one pair of steered wheels, which can be oriented by means of a drawbar, and at least one pair of driving wheels, which are actuated by an electric motor, which in turn is powered by a current generator which is provided, together with the associated internal-combustion engine, on board the trailer; the chassis also supports a hydraulic pump and a hydraulic unit to which the hydraulic components of the body of the welding unit are to be connected, and an electrical unit for connecting the electrical devices with which the welding unit is provided; the chassis is provided with a fuel tank for the internal-combustion engine and an oil tank for the pump, the hydraulic unit and the hydraulic components of the welding unit connected to the pump; in this manner, the welding unit can be mov
    Type: Application
    Filed: January 25, 2008
    Publication date: April 15, 2010
    Inventor: Renzo Bortoli
  • Publication number: 20100032048
    Abstract: In an electric resistance welded steel pipe with excellent weld toughness for a line pipe, the area fraction of minute defects each having a maximum length of less than 50 ?m in a projection plane of an electric resistance welded seam is in the range of 0.035 to 0.000006, and the absorbed energy at ?40° C. measured by a method for an impact test of metallic materials is 100 J or more.
    Type: Application
    Filed: May 18, 2007
    Publication date: February 11, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Hiroyasu Yokoyama, Kazuhito Kenmochi, Takatoshi Okabe
  • Patent number: 7592572
    Abstract: A cartridge heater, especially a compressed cartridge heater (1) has at least one heating coil (8, 9), which is arranged exposed in a metallic tubular body (2) and is embedded in a granulated insulating material. The ends of heating coil portions (8, 9) are provided with terminals (7) projecting from the tubular body (2). To make it possible to manufacture such a cartridge heater with minimal effort in terms of labor and material, a flat insulating plate (10) coordinated in its width with the internal diameter of the tubular body (2) is provided as the carrier. The heating coils (8, 9) extend along the two flat sides of the insulating plate (10) and the two heating coils (8, 9) are connected to one another by a coil section (12, 12?), which is led around a deflecting edge (27) of the insulating plate (10).
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: September 22, 2009
    Assignee: Türk + Hillinger GmbH
    Inventor: Andreas Schlipf
  • Patent number: 7554064
    Abstract: An electrical resistance heater element has a metal tube containing an electrical resistance coil that is electrically insulated from the metal tube by magnesium oxide powder, the coil being bonded to a conductor pin that protrudes from an open end of the tube. The powder is sealed against moisture by placing at least the open end of the tube within a chamber and immersing the open end within liquid silicone. A gas is pumped into the chamber to pressurize the silicone sufficiently to cause some of it to encroach into the powder through the open end of the tube. The heater element is installed within a heat exchanger with the silicone remaining uncured.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: June 30, 2009
    Assignee: Gaumer Company, Inc.
    Inventors: Jackie G. Fannin, Jack L. McClanahan
  • Patent number: 7372007
    Abstract: An electrical heater bundle has heater elements, each including a metal tube, an electrical resistance coil within the tube, a conductor pin connected to the coil and protruding from an end of the tube, and an electrical insulation powder surrounding the coil within the tube. A conical cavity is located in the insulation powder at the end of the tube, the cavity extending from an inner diameter of the tube to the conductor pin. The cavity is filled with an epoxy that is cured in place. The insulation powder may have an infiltrated layer at the cavity that is an uncured liquid silicone. The heater elements are mounted to a header plate, and the elements associated with the three different phases of electrical power may protrude past the header plate at different distances.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: May 13, 2008
    Assignee: Gaumer Company, Inc.
    Inventors: Jack L. McClanahan, Craig S. Tiras, Jackie G. Fannin
  • Patent number: 7172951
    Abstract: An apparatus and a system for separating dice from a substrate are described herein.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: February 6, 2007
    Assignee: Intel Corporation
    Inventors: Oi Fong Chin, Yew Wee Cheong, Weng Khoon Mong
  • Patent number: 7061252
    Abstract: A protection circuit, configured to detect and suppress electrical pre-arcing and arcing conditions in a resistive heater wire circuit, comprises a transient voltage suppressor, signal level sensing load coupled to the output of the voltage suppressor, detection and control circuitry, and a high-speed switch or electrical gate. The control circuitry is configured to control the operation of the switch, coupled between said control circuitry and the heater wire, wherein the switch is opened in response to an electrical pre-arcing or arcing condition or a short circuit condition.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: June 13, 2006
    Assignee: Hudson Respiratory Care, Inc.
    Inventors: Chad E. Bouton, Felicia R. Ruggeri
  • Publication number: 20040226919
    Abstract: A method and a system for resistance seam welding of a foil and at least one foil support of a fuel cell system. During welding, the thin foil, together with the thicker foil support, is moved relative to the roller electrode while resting on a flat support element. In a suitable welding system, a counter-electrode is designed as a flat support element, such as a welding strip, that is displaceable relative to the roller electrode, the roller electrode being in rolling contact with the foil support, but not with the foil. Depending on whether one foil is to be welded to one or two foil frames, the support element may be designed having a high or a low specific electric resistance.
    Type: Application
    Filed: February 12, 2004
    Publication date: November 18, 2004
    Applicant: DaimlerChrysler AG
    Inventors: Thomas Beisswenger, Arnold Lamm, Thomas Poschmann, Bernhard Vogel, Wolfgang Weger, Norbert Wiesheu
  • Patent number: 6365865
    Abstract: A welding process in which fixture pipes 3 are resistance welded to opposite ends of a hollow stabilizer's suspension arm 1 for a vehicle and thereafter, these two parts are subjected to arc welding, but with a first step of the ends of the hollow stabilizer's suspension arm upset to form thick wall portions before resistance welding and arc welding are performed. The initial resistance welding retains the two parts in place for the arc welding step.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: April 2, 2002
    Assignee: Chuohatsujo Kabushiki Kaisha
    Inventor: Hirotusgu Kurokawa
  • Patent number: 6037556
    Abstract: In high frequency welding apparatus in which high frequency electrical heating current is supplied to metal surfaces to be welded together by contacts engaging the metal which is advanced toward a weld point, the contacts engage the metal in advance of the weld point and have contact faces with downstream edges contacting the metal. The downstream edge of one of the contacts, or the downstream edges of the both of the contacts, is or are skewed with respect to the path or paths of the metal surfaces to be heated so that the downstream edge or edges extend at an acute angle of about 35.degree. to about 55 .degree. with respect to the path or paths of the metal surface or surfaces, the angle being intermediate the contacts and the weld point.
    Type: Grant
    Filed: November 11, 1998
    Date of Patent: March 14, 2000
    Assignee: Thermatool Corp.
    Inventor: Wallace R. Rudd
  • Patent number: 5994680
    Abstract: An electric heating element having a central conductor and an outer metallic sheath is welded to a base of vessel to provide a heating container, for hot water in a domestic appliance for example. In order to carry out the welding, the vessel is heated up by an induction heater to a certain temperature and the temperature of the actual contacting welding surfaces raised above the certain temperature to a fusing temperature by applying and controlling electric power supplied to the conductor while the heating element is held firmly in position against the base.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: November 30, 1999
    Assignee: Chiaphua Industries Limited
    Inventor: John Duncan McNair
  • Patent number: 5831235
    Abstract: An apparatus and method for welding a bracket to a tube are disclosed. A bracket having a semi-cylindrical portion with an inner surface and a radially inward projection extending from the inner surface is positioned adjacent to a tube with the semi-cylindrical portion of the bracket coaxially nested about the tube and with the radially inward projection engaging the tube at a faying surface. A resistance welding apparatus having a controller, an actuator, and a power supply is then provided. The power supply is coupled to the bracket and the tube through respective electrodes. A transducer cooperates with the electrodes to provide an output indicative of the position of the electrodes. A controller cooperates with the transducer and the power supply wherein the controller regulates the power output of the power supply as a function of the displacement between the electrodes to ensure that the bracket is properly welded to the tube.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: November 3, 1998
    Inventor: Dimitrios G. Cecil
  • Patent number: 5759499
    Abstract: A thermal reactor to carry out a chemical reaction under precise and controlled temperature conditions. In a preferred embodiment, the reactor supplies a carbon-laden atmosphere with a predetermined carbon potential to a heat treatment furnace. The reactor has a sealed chamber, in which a chemical reaction is carried out. The chamber forms an electrical resistance element in order to produce within it the reaction temperature conditions. The chamber further being electrically isolated, having an inlet for supplying reaction products, and an outlet for the products coming from the reaction. Temperature measuring thermocouples are positioned on the chamber to determine, accurately and locally, the temperature required for the reaction. Carbon potential is measured by a probe arranged at the chamber's outlet.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: June 2, 1998
    Assignee: Serthel
    Inventors: Guy Bourdet, Alexis Lebris
  • Patent number: 5622637
    Abstract: In a seam welding process for overlapping sheets, in particular for welding can bodies, the welding force is momentarily reduced upon each insertion of a can body between the welding rollers. This keeps the welding pressure constant even at the start of a can body. In this way the power input to the sheet can be kept constant even at the start of a can body, and the weld quality even at the start of a can body satisfies requirements.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: April 22, 1997
    Assignee: Elpatronic AG
    Inventor: Peter Taiana
  • Patent number: 5185511
    Abstract: A multifunction laser assisted processing apparatus can perform cutting processes, marking processes and drawing processes on a workpiece material. The apparatus includes a laser beam source, a work face to support the workpiece material, an X-direction movable arm on the work face, and a Y-direction movable process head to project laser beam on the workpiece material. The apparatus further includes an output adjustable mechanism to adjust the amount of the laser beam from the laser beam source. The adjustable mechanism in one embodiment has a gas control device for keeping the pressure of laser medium gas at constant level, and a DC high-voltage power unit capable of adjusting the resonance and supplying it to the laser beam source.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: February 9, 1993
    Assignee: Juki Corporation
    Inventor: Maasaki Yabu
  • Patent number: 4885450
    Abstract: The machine of the invention, intended for resistance butt welding of pipes, comprises two semi-housings mounted externally on the pipes to be welded to the opposite sides of a joint and interconnected by the flash and upset drive, a clamping device mounted in each semihousing, including radially arranged hydraulic cylinders with clamping shoes, and a control system of the hydraulic cylinders.The control system of the hydraulic cylinders includes control valve units structurally associated with the piston rods of the hydraulic cylinders. The control valve units include follow-up spool valves interconnected by their common actuator linkage.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: December 5, 1989
    Inventors: Boris E. Paton, Vladimir K. Lebedev, Sergei I. Kuchuk-Yatsenko, Vasily A. Sakharnov, Alexandr K. Kharchenko, Mikhail R. Unigovsky
  • Patent number: 4772771
    Abstract: A method for the production of an electric seam welded steel pipe for oil-well use which has good resistance to collapse pressure and souring, by providing a steel containing 0.08-0.26% C by weight, 0.8-1.9% Mn by weight, 0.5% or less Si by weight, the remainder being Fe and unavoidable impurities, subjecting the steel to hot rolling, and hardening, and coiling the treated steel at a temperature not exceeding 250.degree. C., after which the steel is then formed into tubular form and welded by electric resistance welding to produce an electric seam welded pipe, and the weld heat affected zones of the pipe are subjected to heating to a temperature of 900.degree. C. or more to effect hardening, and then the whole pipe is tempered.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: September 20, 1988
    Assignee: Nippon Steel Corporation
    Inventors: Hiroshi Murayama, Youji Yamamoto, Motofumi Koyuba
  • Patent number: 4661673
    Abstract: A method and apparatus for creating a circumferential seam weld in surrounding relationship to a cylindrical workpiece. The workpiece is moved continuously along a work path at a preselected velocity, and is simultaneously supported for free rotation about its longitudinal central axis. The workpiece moves into engagement with opposed surfaces defined by a pair of electrodes, one of which moves relative to the other and relative to the workpiece for causing rotation of the workpiece through approximately one-half revolution, whereby the two electrodes simultaneously form two welds which are about 180.degree. apart and which may individually extend up to a total angle of rotation of about 180.degree., or slightly in excess thereof, so that the welds overlap.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: April 28, 1987
    Assignee: Newcor, Inc.
    Inventor: Thomas J. Geiermann
  • Patent number: 4645893
    Abstract: In the manufacture of spiral-welded steel pipe, material strip or plate is fed in its longitudinal direction and continuously formed into spiral pipe form. One side-edge of the strip and the other side-edge of the strip that has already been spirally formed are welded together by the electric-resistance method where they meet. The edges of the strip and formed pipe are held together simultaneously with or immediately after the electric-resistance welding from both inside and outside the pipe using a pair of pressure rolls. The bead formed as a result of the electric-resistance welding is reformed simultaneously with or immediately after the holding by the pressure rolls is accomplished. Then, the electric-resistance welded side-ends are welded again by the arc method.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: February 24, 1987
    Assignee: Nippon Steel Corporation
    Inventors: Yasumi Shimazaki, Yoshito Tsuyama, Hiroyo Haga, Manabu Hanzawa
  • Patent number: 4587394
    Abstract: Device and method for welding nuclear fuel assembly structural elements, comprising a receiving stand for the guide tubes and structural elements of the assembly, and a welding group having a carriage movable parallel to the guide tubes comprising at least one welding gun united on the carriage by means enabling it to move parallel to a row of guide tubes and to rotate between an orientation in which the gun can pass between two adjacent rows of guide tubes and an orientation in which it comes to grip a tube at the location of the proposed weld, electrical welding pulses being applied to the guns.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: May 6, 1986
    Inventors: Bernard Vere, Biryoukoff Maura
  • Patent number: 4523072
    Abstract: A process for producing an ERW tube having welds which have been improved in toughness without adversely affecting the toughness of the parent metal of the tube is disclosed. The process comprises forming a continuous low alloy steel strip into a tubular shape through a series of forming rolls, continuously carrying out electrical resistance welding of a seam which is formed from the opposite side edges of the hoop and which extends in the longitudinal direction to produce an electrical resistance welded tube, heating the welds of the thus obtained electrical seam welded tube to a temperature not lower than the A.sub.c3 point, then cooling the heated welds at cooling rate of 15.degree.-30.degree. C./sec for at least between 800.degree. C. and the A.sub.r1 point, and tempering the thus cooled welds of the tube at a temperature of 450.degree.-800.degree. C.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: June 11, 1985
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Hiroshi Nakate, Masatoshi Kondo, Nobuyuki Gosho
  • Patent number: 4508949
    Abstract: Methods and apparatus for manufacturing tapered, hollow metal poles which can be used for manufacturing poles of various lengths, tapers and cross-sectional dimensions with the same apparatus. A substantially complete, tapered tube is formed from a plate or sheet of metal having lips at its longitudinal side edges which extend transversely to the major surface of the plate or sheet. The tube is guided at its lip portions to a weld point where pressure is applied to force the lips together by a grooved roller which applies pressure to the oppositely facing surfaces of the lips in directions transverse to such surfaces. The lips are spaced in advance of the weld point, and high frequency, electric heating current is supplied to the tube at opposite sides of the gap between the lips to heat the tube at the lips to welding temperature as it is advanced to the weld point.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: April 2, 1985
    Assignee: Thermatool Corporation
    Inventor: Wallace C. Rudd
  • Patent number: 4499364
    Abstract: In a resistance welding apparatus of a detachable grip type an improvement consists in that each pipe grip has a bracket (16) whereon two double-arm levers (18), one per side member (3), are pivoted. Similar arms of each lever (18) are interconnected by an extension spring (19), while the other arms are operatively associated with swinging jaws (14) adapted to abut against the pipe surface in their operating position. Each side member (3) is provided with a stop (21) for limiting the movement of the levers (18) relative the corresponding side member (3) in the direction of the action of the extension spring (19).
    Type: Grant
    Filed: November 2, 1982
    Date of Patent: February 12, 1985
    Inventors: Alexandr M. Starostin, Alexei M. Malakhov, Tamara A. Chertilina, Vladislav I. Ponomar, Nikolai I. Postolaty, Sergei I. Kuchuk-Yatsenko, Filipp I. Peretrukhin, Anatoly D. Gluschenko, Sergei A. Solodovnikov, Jury G. Shvets, Orest M. Serafin
  • Patent number: 4362921
    Abstract: A method of manufacturing a solar panel element comprising a metal sheet or sheets secured to fluid-tight tubing substantially continuously along its length by metal which has been heated and cooled, e.g. weld metal, in which the tubing and the metal sheet or sheets are held in contact while they are heated to welding temperature, either forge welding or melting temperature. In the preferred methods, the heating is accomplished by high frequency, electric currents using a proximity conductor. Also, in the preferred methods, the tubing is formed with longitudinal lips as the heating is carried out, and the lips are secured together by welding them together simultaneously with the welding of the sheet or sheets to the tubing.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: December 7, 1982
    Assignee: Thermatool Corp.
    Inventor: Wallace C. Rudd
  • Patent number: 4349397
    Abstract: Pipe components, i.e., pipes, adapting members and fittings made of weldable plastic, are interconnected by electrically weldable joints. The welding process is made possible by a welding sleeve 3 being connected to the output 4 of the device. A switch-on monitor 11 permits the switching on of a switch stage 7 of the welding current circuit. The thermal energy is determined by square-law simulation of the welding or mains voltage in a pulse generator 9, which produces a pulse frequency which is dependent on this value and whose pulses are summed in a counter 10. Once a count value that corresponds to the thermal energy has been reached, the switch stage 7 is switched off. If the count value is not reached a function monitor 5 gives a warning signal.
    Type: Grant
    Filed: December 24, 1978
    Date of Patent: September 14, 1982
    Inventor: Werner Sturm
  • Patent number: 4317267
    Abstract: This invention is made with a view to increasing the fusing strength of an end piece in a valve moving push rod for internal combustion engines. The fusing part of the push rod according to the present invention consists of an .alpha.-martensite structure and a primary truestite structure in a cotransition boundary range of a segmental section formed into the hardened layer of the end piece from the fused boundary surface of the end piece with a tube end part and is provided with a tough mixed layer arcuated from the inside end part of the above mentioned fused boundary surface to the outside end part thereof. This mixed layer is obtained by reducing by a heat feeding means a quick temperature drop caused by the fusing part simultaneously with cutting off the fusing current in welding by electric resistance the end piece on the fixed side surface to the peripheral edge of the end port of a tube material.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: March 2, 1982
    Assignee: Usui Kokusai Sangyo, K.K.
    Inventor: Masayoshi Usui
  • Patent number: 4310737
    Abstract: A pipe resistance butt welding apparatus comprises a movable clamp and a fixed clamp to locate the pipes to be welded. Current-feeding shoes contact the ends of the pipes to be welded together. A device is provided for axially moving the movable clamp in fusing and upsetting the pipes. Both clamps and the device are mounted on an elongated supporting member. The shoes are carried by beams oriented along the supporting member and having bevels acted upon by drive rollers, whose axes are directed across the supporting member. The invention is useful for welding large diameter pipes.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: January 12, 1982
    Inventors: Boris E. Paton, Vladimir K. Lebedev, Sergei I. Kuchuk-Yatsenko, Vasily A. Sakharnov, Boris A. Galyan, Alexandr P. Miroshnichenko
  • Patent number: 4287402
    Abstract: Markings are placed alongside the gap of a split tube and their distance is measured downstream from the point of welding; the measuring result is used to control upsetting pressure in the weld print.
    Type: Grant
    Filed: June 7, 1979
    Date of Patent: September 1, 1981
    Assignee: Mannesmann AG.
    Inventors: Erhard Hentzschel, Erhard Jaspert, Kurt Niederhoff