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Showing papers on "Butt welding published in 1969"


Patent
28 Nov 1969
TL;DR: In this paper, a method of fillerless butt welding hot crack sensitive aluminum tubing with high-frequency current pulsation with continuous pressure purging as a means of eliminating flux and improving weld bead contour is presented.
Abstract: A method of fillerless butt welding hot crack sensitive aluminum tubing with high-frequency current pulsation with continuous pressure purging as a means of eliminating flux and improving weld bead contour.

21 citations


Patent
19 Jun 1969
TL;DR: A fine wire welding machine for cold-butt welding small diameter wires through a multiple upset technique is described in this article, which includes a loading mechanism for accurately positioning the fine wire strands for subsequent engagement with the welding dies and welding dies are movable in a plane parallel to their abutting faces for shearing the wires and aligning the end of the wire from one spool with another spool for subsequent welding.
Abstract: A fine wire welding machine for cold butt welding small diameter wires through a multiple upset technique The machine includes a loading mechanism for accurately positioning the fine wire strands for subsequent engagement with the welding dies and the welding dies are movable in a plane parallel to their abutting faces for shearing the wires and aligning the end of the wire from one spool with the end of the wire from another spool for the subsequent welding technique An improved operating mechanism is incorporated for operating the dies for movement in a predetermined sequence whereby the dies first move into gripping relation with the respective wire ends, the dies then move together to upset the wire ends, next the dies release the wire ends while still held in the upset position and finally the dies retract from their upset position for a repeat of the cycle

14 citations


Journal ArticleDOI
TL;DR: This algorithm is applicable to nonautomatic welding, and it does not require any treatment for taking X-ray photographs, and is required only once for each kind of welding.

13 citations


Patent
07 Jul 1969
TL;DR: In this article, a method of making a butt weld between sheet steel members having a thickness of 0.2 in. or more, comprising the steps of welding the sheet steel member from one side only by the consumable-electrode arc welding process with the aid of a backing strip of steel which is welded on to but not fused through the welding operation, was described.
Abstract: A method of making a butt weld between sheet steel members having a thickness of 0.2 in. or more, comprising the steps of welding the sheet steel members from one side only by the consumable-electrode arc welding process with the aid of a backing strip of steel which is welded on to but not fused through the welding operation, said backing strip having a thickness not less than 0.08 in., and subsequently removing the steel backing strip by a flame machining operation.

9 citations


Patent
25 Apr 1969
TL;DR: In this paper, a method of effecting electrical butt welding of workpieces by continuously flashing the ends of the workpieces to be welded to a temperature within 0.7 to 1.0 of the melting point of the material and with a variation during the welding process of the flashing rate followed by upsetting, is presented.
Abstract: A method of effecting electrical butt welding of workpieces by continuously flashing the ends of the workpieces to be welded to a temperature within 0.7 to 1.0 of the melting point of the workpiece material and with a variation during the welding process of the flashing rate followed by upsetting; the extremal value of the power evolving in the workpieces to be welded being maintained in the course of the flashing process, whereas upsetting is effected to a value responsive to the distance between sections of the workpieces at a predetermined heating temperature depending on the properties of the workpiece material. An apparatus for carrying into effect the said method comprises a welding machine and a device for controlling the processes of flashing and upsetting, provided with two channels for controlling the welding process.

8 citations


Patent
Lamatsch Hans1
16 Jul 1969
TL;DR: In this article, a recess is formed in one metal part corresponding in cross section to another metal part at a location of the firstmentioned metal part where the other metal part is to be connected.
Abstract: A recess is formed in one metal part corresponding in cross section to another metal part at a location of the firstmentioned metal part at which the other metal part is to be connected. The other metal part is then snugly inserted in the recess, and an electron beam is applied to the parts parallel to the plane of engagement between both parts so as to connect the parts by butt welding.

6 citations


Patent
05 Nov 1969
TL;DR: In this paper, a resistance butt welding wire workpiece is butted, contact pressure is applied between the ends, a welding current is passed through the workpieces to heat the ends to forging temperature and after the forging temperature is reached a first forging pressure, higher than the contact pressure, is applied, followed by a second and higher forging pressure.
Abstract: 1,169,882. Welding by pressure. BRITISH ROPES Ltd. 18 Nov., 1966 [20 Aug., 1965], No. 35935/65. Heading B3R. In resistance butt welding wire workpieces the ends of the workpieces are butted, contact pressure is applied between the ends, a welding current is passed through the workpieces to heat the ends to forging temperature and after the forging temperature is reached a first forging pressure, higher than the contact pressure, is applied between the ends followed by a second and higher forging pressure. A stationary electrode jaw 1 and a movable electrode jaw 2 are connected to the secondary of a transformer 3 whose primary is energized via a contactor 4 controlled by a manual button 5 and a normally closed microswitch MS2. The movable jaw 2 is connected to a piston 6 in cylinder 7 having chambers 7a, 7b to which air is admitted via reducing valves 8a, 8b producing pressures P1 and P2 with P1 greater than P2. Solenoidoperated valves 9a, 9b connect the chambers to pressure or exhaust and the four control solenoids 11, 12,13, 14 are energized respectively via a contact S1/1 of a switch S1; a contact S2/1 of a switch S2; a contact S1/2 of switch S1 and S2/2 of switch S2; and normally open microswitch MS1. Depression of either switch S1 or S2 releases the other. In operation switch S1 and button 5 are pressed to admit air to both chambers 7a, 7b and close the contactor 4. The pressure differential supplies contact pressure while welding current is passed and as the wire workpieces soften the jaw 2 moves to operate switch MS2 which cuts off the current and operates switch MS 1 which exhausts chamber 7b through a throttle valve (not shown) to increase the pressure for forging. This throttle is opened or by-passed to produce a second forging pressure higher than the first. When the metal collapses the pressure falls and part of the forging takes place at low pressure. The instant at which pressure is exhausted from chamber 7b may be selected by means, e.g. photoelectric means measuring the temperature of the interface or by means measuring the pressure between the faces. With large workpieces the lower forging pressure squeezes out oxides and decarburized material in carbon steels, and the second faster movement completes forging. A timer may be used to control the duration of the welding current.

5 citations


Patent
28 Jan 1969
TL;DR: In this article, a machine for manufacturing reinforced structural panels is described, where a conveyor system moves successive loads, each comprising a group of structural shapes and a structural plate, past cooperating positioning and holddown apparatus, welding apparatus, and secondary hold-down apparatus.
Abstract: A machine for manufacturing reinforced structural panels wherein a conveyor system moves successive loads, each comprising a group of structural shapes and a structural plate, past cooperating positioning and hold-down apparatus, welding apparatus and secondary hold-down apparatus. The positioning and hold-down apparatus maintains the shapes in a desired upright position with a desired spacing between shapes and holds the shapes tightly against the plate. The welding apparatus includes a series of side-by-side welding units for simultaneously welding each group of shapes to its plate. The secondary hold-down apparatus prevents warping of the shapes and plates and keeps the weldment from raising off of the conveyor because of heat distortion during the welding operations.

4 citations



Patent
20 Jun 1969
TL;DR: In this paper, a burr formed between two pipe sections when they are welded together is removed by displacement of a cutting tool inside the welded pipe sections and a second cutting tool outside the sections.
Abstract: A burr formed between two pipe sections when they are welded together is removed by displacement of a cutting tool inside the welded pipe sections and a second cutting tool outside the welded sections. A burr catcher is coupled to the inner cutting tool to catch the portion of the burr which is removed from the welded joint to enable its subsequent removal. The cutting tool may be free falling or it may be coupled to a free falling weight system, so as to move upwardly in the pipe sections or it may be driven externally by a hydraulic cylinder.

3 citations


Patent
23 Dec 1969
TL;DR: In this paper, a backing ring for use in fusion butt welding of tubes and made from a particulate flux bound with a binder, the binder is soluble in a solvent in which the flux is not soluble and the flux fuses at welding temperature without mixing with the weld metal.
Abstract: 1,175,181. Welding by fusion. FOSTER WHEELER Ltd. 26 Jan., 1967 [25 Jan., 1966], No. 3311/66. Heading B3R. In a backing ring for use in fusion butt welding of tubes and made from a particulate flux bound with a binder, the binder is soluble in a solvent in which the flux is not soluble and the flux fuses at welding temperature without mixing with the weld metal. The ring consists of a particulate flux bound with water soluble sodium carboxy methyl cellulose. The ring 16 is tapered outwardly in both directions and has a central flange 20. Apertures in the ring 16 receive spacing rods 22. In use the ring 16 is positioned in tubes 10, 12, the spacing rods 22 serving to determine the welding gap. The largest diameter of the tapered parts of the ring 16 is wider than the internal diameter of the tubes 10, 12 and the width of the flange 20 is greater than the welding gap so that when located for welding the tubes 10, 12 crush the flange 20 and the adjacent parts of the ring 16 to ensure a tight fit. After tack welding the tubes 10, 12, the spacing rods 22 are removed and welding is effected by a carbon dioxide shielded metal arc. The flux fuses adjacent the weld to allow a smooth internal weld bead to form. The ring 16 is removed by dissolving the binder in water and washing the flux out of the tubes 10, 12.

Patent
10 Sep 1969
TL;DR: In this paper, two window frame bars are fixed in the platens of a flash welder and the bars are welded so that the webs just contact and weld upset produced on the flanges is removed.
Abstract: 1,163,644. Welding by pressure. A. I. WELDERS Ltd. 6 March, 1968 [23 June, 1967], No. 29063/67. Heading B3R. In joining two metal components which comprise rolled, extruded or similarly formed sections each comprising flanges extending laterally from a web or like connecting piece extensions extending over only part of the full cross sections of the components are formed on surfaces of the components of full cross-section and the components are flash butt welded together so that, after welding, the surfaces of full crosssection not provided with extensions just contact. Two window frame bars 10, 11 each having a web and two oppositely directed flanges are provided with integral extensions 17, 18 on the flanges of the bars at the regions where the bars are cut at 45 degrees, the projections being of the full thickness of the flanges and the connecting webs being free of projections. The bars are fixed in the platens of a flash welder and the bars are welded so that the webs just contact and weld upset produced on the flanges is removed.

Patent
10 Feb 1969
TL;DR: In this paper, an apparatus and method for butt welding and sealing sections of tubing together is described. The apparatus includes welding dies which circumscribe the tubing and operate against abutting flanges or flared end portions of aligned tubes to effect a circumscribing weld between the abutted tube flanges.
Abstract: An apparatus and method are provided for butt welding and sealing sections of tubing together. The apparatus includes welding dies which circumscribe the tubing and operate against abutting flanges or flared end portions of aligned tubes to effect a circumscribing weld between the abutting tube flanges. In one form, power operated means urges the dies towards each other with sufficient force to compress and pressure weld the flanges together. In another form, welding pressure is developed by manual means including levers to provide a sufficient mechanical advantage to weld the flanges together. Auxilliary energy such as ultrasonic energy, resistance electrical energy or other form of energy may be brought into play to cooperate in the welding action.

01 Oct 1969
TL;DR: In this article, it was concluded that it would be feasible to inspect a complete weld with a circumferential array of angle probes, and a bracelet probe device was developed to meet these requirements.
Abstract: Tube butt welds in boilers were not subject to 100 percent inspection, and leakages at them were confirmed as a significant cause of boiler outage. Consequently, it was concluded that it would be feasible to inspect a complete weld with a circumferential array of angle probes--the bracelet probe device. Three regional laboratories had particular requirements and a full description of the devices developed to meet these is given. Also the extensive advantages offered by the bracelet probe device are listed.

Patent
23 Jul 1969
TL;DR: In this paper, an elongated or hollow cylindrical backup member is placed below the edges to be butt welded to receive the porous portion of the weld bead which backup member and porous portion which may be subsequently cut away without undercutting the work and without leaving remnants of the backup member on the work.
Abstract: A method for butt welding with electron beams wherein an elongated or hollow cylindrical backup member is placed below the edges to be butt welded to receive the porous portion of the weld bead which backup member and porous portion which may be subsequently cut away without undercutting the work and without leaving remnants of the backup member on the work.