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| Number | Title | Issue Date |
| 7226894 | Superconducting wire, method of manufacture thereof and the articles derived therefrom Disclosed herein is method for making a wire comprising contacting a first end of a first superconducting wire with a second end of a second superconducting wire, wherein the superconducting wire comprises a superconducting filament having a superconducting composit... | 06/05/2007 |
| 7168606 | Method of mitigating inner diameter reduction of welded joints Aspects of the present invention provide methods and apparatus for connecting two tubulars using a welding process with reduced inner diameter flash. The method includes connecting an end of a first expandable tubular to an end of a second expandable tubular using a... | 01/30/2007 |
| 6894244 | Method for fabricating embossed articles by flash welding An article with an embossment thereon is fabricated by providing an article precursor, providing an embossment precursor, and flash welding the embossment precursor and the article precursor together, to form the article with the embossment thereon. ... | 05/17/2005 |
| 6875948 | Method and device for controlling the welding by flash welding of two metallic parts The invention concerns a method for controlling the butt welding, by flash welding, of two metallic parts (A, A′) in a welding machine of the type comprising two pairs of clamping dies (2, 2′) mounted respectively on a fixed frame (1) and on a mobi... | 04/05/2005 |
| 6831247 | Resistance butt flash welding A resistance butt flash welding machine comprises two work piece clamping platens, at least one of which is movable with respect to the other, an electric servo motor operatively mechanically connected to the movable platen, and a programmable electrical control con... | 12/14/2004 |
| 6744004 | Method for welding a differential housing A method of welding an axle housing surface to a blank surface includes generated heat in one of the two components. Heat is generated from at least one of these surfaces at their interface sufficient to weld them together. The surfaces are then applied together. | 06/01/2004 |
| 6294752 | Method of flash-butt welding A method of flash-butt welding in which the travel speed (Vt) of the machine mobile plate and the welding voltage (U2) are changed (by preset programs) and the travel speed is controlled through negative feedback by welding current, ... | 09/25/2001 |
| 6107594 | Flash butt welding device A flash-butt welder having a stationary head 41 and a moving head 42, a pair of electrodes 45a, 45b, and 46a, 46b arranged to each of the stationary and moving heads, respectively, wherein power source transformers 12 through 16 are located at the station... | 08/22/2000 |
| 5734142 | Method of welding electrically conductive metal profiles 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 proc... | 03/31/1998 |
| 5367138 | Welding assurance control techniques Techniques for assuring the accuracy of the welding of a part including a part calibration cycle, a tap check cycle and a gap detection cycle. The part calibration cycle determines the electrical load presented by the part to the welder transformer. The t... | 11/22/1994 |
| 5270514 | Method and apparatus for flash butt welding railway rails A welding method and apparatus for flash butt welding adjacent ends of axially aligned railway rails includes a base frame and fixed and movable platens supported on the base frame. The platens support rail sections and are under the control of controller... | 12/14/1993 |
| 5091624 | Method of flash butt welding high-carbon material, in particular nodular cast iron A method of flash butt welding high-carbon materials, in particular nodular cast iron wherein the arcing craters produced by intermitting contact of the contact faces have a maximum roughness depth RT such that this roughness depth lies within ... | 02/25/1992 |
| 5080278 | Process and apparatus for sealing a metallic capsule and welding it to a metal cable A process and apparatus for leak-proof sealing of a metallic capsule closed by a stopper and joining the capsule to a metal cable by arc welding, wherein a capacitor is charged, the capsule with a striking tip at one end or the stopper with an ignition po... | 01/14/1992 |
| 4988843 | Electrical flash butt welding apparatus Apparatus for electrical flash butt welding the ends of metal sheet or strip including a pair of flat faced parallel welding electrodes extending across the full width of the metal sheet or strip, one on each side thereof, and an electrode cleaning device... | 01/29/1991 |
| 4940876 | Method of flash-butt resistance welding of a batch of like parts in pairs A method of flash-butt resistance welding of a batch of like parts in pairs consists in that during flashing off of workpieces (1,2) they are brought apart or together depending on the resulting resistance obtained by comparison of the actual resistance b... | 07/10/1990 |
| 4929816 | Electric flash-butt welding machine and method of providing a welded joint between adjacent ends of rail sections A mobile electric flash-butt welding machine comprises machine frame, undercarriages supporting the machine frame on a railroad track, and a drive for propelling the machine frame along the track. The machine frame carries a hydraulic fluid supply pump, a... | 05/29/1990 |
| 4733044 | Method for controlling a flash-butt resistance welding process The disclosed process includes the steps of and upsetting the flashing parts being welded. The flashing is conducted with concurrent measurement of useful electric power and an electric parameter of the flashing process which is related to the power by a ... | 03/22/1988 |
| 4725707 | Flash-butt resistance welding process A flash-butt resistance welding process including a flashing of parts being welded and their upsetting. The direction of speed of motion of the parts during flashing is changed by converging and diverging them. The parts being welded are converged up to t... | 02/16/1988 |
| 4645896 | Method and apparatus for flash welding A method and apparatus for flash welding are disclosed wherein a first predetermined voltage is applied between a pair of workpieces to be welded to generate flashes therebetween, and a second predetermined voltage lower than the first predetermined volta... | 02/24/1987 |
| 4642869 | Process of attaching a nut to a plate-shaped workpiece To attach a nut to a plate-shaped workpiece, especially to a metal sheet, in such a way that it has self-locking properties without additional aids or parts, the force fastening the nut and acting on a free thrust surface of the nut is divided into at lea... | 02/17/1987 |
| 4511784 | Method for welding by magnetically driven arc A method for welding by a magnetically driven arc, which comprises placing two objects of welding in butt formation with a small gap between the end edges thereof to form a welding line; parallelly connecting a first electric circuit comprising the two ob... | 04/16/1985 |
| 4506134 | Flash butt welding method A joint is made between two pieces of steel which have been preheated to a temperature To (°C.) near their abutting surfaces by subjecting first to flashing and then to upsetting. When the ultimate flashing rate is V (mm/sec.), a current whose density I ... | 03/19/1985 |
| 4489229 | Flash butt welder for joining flat strip ends In a flash butt welder for joining strip ends, the improvement for improving the quality of flash butt welds made in specialty grade steels, such as high strength low alloy, as well as for considerably reducing the upset current requirement, by applying a... | 12/18/1984 |
| 4417121 | Method of flash butt welding The parts to be welded together are caused to continuously approach each other and their ends are fused by an alternating current, and concurrently an oscillatory motion along the direction of approach is imparted to one of the parts, whereby additional r... | 11/22/1983 |
| 4383162 | Electrical control circuits for flash welders An electrical control circuit which provides means of initiating the start of upset of a flash welding machine at an operator selectable value of flashing electrical energy. The energy signal for this circuit is taken from an energy monitor, such as the o... | 05/10/1983 |
| 4376882 | Method of resistance flash butt welding Surfaces of metal workpieces being welded are fused at a constant speed of feeding the workpieces towards each other, and the speed of feeding is, before the upsetting, increased to a final value thereof for a period of (1.0 to 4.0) (Ɗmax/v1),... | 03/15/1983 |
| 4352972 | Method of resistance flash butt welding A method consists in that the workpieces to be welded together are at first continuously moved towards each other with the welding current on and the ends of the workpieces are fused, the thermal state of the ends being monitored in terms of current, or o... | 10/05/1982 |
| 4329560 | Flash welding method In a method for flash welding metallic materials comprising a flashing step of applying a commercial alternating voltage or a direct-current voltage resulting from its full-wave rectification to the abutting ends of metal workpieces contacted partly with ... | 05/11/1982 |
| 4321452 | Flash welders Method and apparatus for detecting whether or not the gap in adjoining ends of a ring-like workpiece to be flash welded is of normal size, or is so much larger as to produce an unsatisfactory weld. The invention provides means whereby the amount the movab... | 03/23/1982 |
| 4319123 | Method of controlling a magnetically guided welding arc A pair of workpieces are welded together by passing between them an arc which is guided by a magnetic field to rotate on the workpieces. Immediately after striking of the arc the field strength of the magnetic field is relatively great and a relatively gr... | 03/09/1982 |
| 4319117 | Method of flash butt welding Work pieces to be joined together by the flash butt welding method are brought together at a preset no-load voltage, the end faces of the work pieces are fused, and an upsetting is accomplished. The amount of the upsetting is determined within from 1.2 to... | 03/09/1982 |
| 4288676 | Method of continuous flash butt welding and hydraulic drive of continuous flash butt-welding machine for realization of this method In accordance with the disclosure, the workpieces being welded are brought together by rectilinearly oscillating at least one of them along the line of bringing them together with the amplitude in the movement of the workpiece towards the other workpiece ... | 09/08/1981 |
| 4278868 | Methods and apparatus for heating metal parts with magnetically driven travelling electric arc Methods and apparatus for the welding and heat treating of metal parts in which an electric arc extends between a pair of adjacent metal parts or between an electrode and one or more metal parts with the arc traversing the metal part or parts a plurality ... | 07/14/1981 |
| 4273986 | Method and apparatus for arc butt welding In arc butt welding the arc is moved between the faces of the parts to be joined by a magnetic field. In order to insure the arc travels over the whole of the faces to be welded the parts are moved generally parallel to the faces so that the overlapping a... | 06/16/1981 |
| 4205214 | Apparatus for machining flash and upset material formed in flash welding operation A flash and upset material formed in a flash welding operation can be removed by a machining of the flash and upset material for a short time after the welding operation by providing a workpiece clamping function by a main clamp and providing a welding cu... | 05/27/1980 |
| 4164638 | Method for flash butt welding of annular workpieces A method for flash butt welding of annular workpieces, particularly chain links, in which the ends of the workpiece to be welded together, are preheated before flashing and upsetting by controlling the feeding force for the upsetting slide in several succ... | 08/14/1979 |
| 4052585 | Butt welding process and apparatus for effecting same Disclosure is made of a butt welding process, whereby butt ends of articles to be welded together are placed one opposite the other in a chamber containing a shielding medium. The butt ends are then heated until a layer of molten metal is formed on their ... | 10/04/1977 |
| 4044219 | Method and apparatus for controlling flashing speed during resistance butt welding A method for controlling flashing speed during resistance butt welding comprises measuring values of current density for at least two joints between parts being welded, converting them into d-c. voltages, detecting a maximum voltage value, comparing it to... | 08/23/1977 |
| 3980857 | Control and monitor for rotating arc welder A method and apparatus for monitoring parameters which control the quality of welds made by the rotating arc method. Total electrical energy delivered to the parts being welded is controlled and its analog divided by the time during which this energy was ... | 09/14/1976 |
