Class / Patent application number | Description | Number of patent applications / Date published |
219075000 | Nonconsumable electrode (e.g., atomic hydrogen) | 47 |
20080197116 | TIG WELDING SYSTEM AND METHOD - The invention provides a welding arrangement designed to respond the need of an improved welding system that aids in supplying filler material to a weld location. Provided is a welding system including a welding gun and a welding wire feed directly coupled to the welding gun. The welding gun includes a filler material housing, a filler material positioning extension, and a manual advancement device configured to advance a filler material through the welding wire feed. Further provided is a method of operating a welding gun. The method includes passing a current between an electrode and a work piece at a weld location, and advancing a filler material toward the weld location via a channel of a positioning extension in response to engagement of a manual advancement device. | 08-21-2008 |
20090014421 | Weld Repair Method for a Turbine Bucket Tip - A weld repair method uses a gas tungsten or plasma arc welding torch and matching filler. An amperage supplied to the torch and a travel speed of the torch are controlled to produce a weld bead having a mushroom shape. The weld bead is ground from all sides to remove at least one half of a thickness of the weld bead, and another weld bead is formed. The technique produces crack free welds with directionally solidified weld metal that is similar to that of the base material and hence has comparable mechanical properties. | 01-15-2009 |
20090014422 | Device and Method for Welding Workpieces - According to the invention a welding device for welding workpieces is provided. The welding device comprises a welding means for making a welding seam on workpieces and a cleaning nozzle in order to emit a cryogenic medium onto the surfaces of the workpieces in the area of their welding seam to be formed. The distance between the welding means and the nozzles is at least 5 cm. | 01-15-2009 |
20090188897 | Method of Making a Metal Bellows Assembly Having an Intermediate Plate - The formation of a bellows made up of a stack of a predetermined number of ring-convolutions and having an intermediate plate supported within said stack is achieved by supplying several thin metal rings, each having inner and outer edges. A pair of these metal rings are positioned in contiguous relationship and their adjacent inside edges are welded together to form a ring-convolution. This process is repeated until a sufficient number of ring-convolutions are made to eventually make the desired bellows. Before these separate ring-convolutions are fused to each other, an intermediate plate and a support ring are made. The intermediate plate is a disc of metal that is sized smaller than the inside diameter of the rings and is secured to the support ring. The support ring is then positioned between two formed ring-convolutions in contiguous relationship and the three abutting outside edges are welded to each other to form a support plate convolution. The already made ring-convolutions and the support plate convolution are then stacked in the desired order and in contiguous relationship. All not-yet welded adjacent outside edges of said ring-convolutions and said support plate convolution are then welded to form the bellows. A bottom plate is formed and welded to the outside edge of the bottommost ring-convolution and a top ring is finally welded to the uppermost convolution to complete the bellows. The top ring is meant to be welded to a base plate of an infusion pump. | 07-30-2009 |
20100000975 | CORROSION RESISTING JOINING AREA AND METHOD BETWEEN MATERIALS OF COPPER AND STAINLESS STEEL OR TITANIUM, WHICH ARE THE CONSTITUENTS OF PERMANENT CATHODES FOR ELECTROLYTIC PROCESSES AND CATHODES OBTAINED - This disclosure provides a joining area and method between copper and stainless steel or titanium, as well as the permanent cathode obtained, where said joining area is made of a first zone of a copper-nickel (Cu—Ni) alloy, an intermediate zone with a mostly nickel alloy or pure nickel and a second zone made of a stainless steel-nickel alloy, which is the result of the participating materials being cast in an arc welding process, for example TIG, MIG or manual arc using electrodes of nickel as welding contributor between said materials and their space arrangement, that is to say, leaving a separation between the materials when performing the welding process, thus ensuring as follows: a) greater tensile strength, b) a substantial improvement of corrosion resistance of the joint welding, and c) improvement of conductibility, which can be improved still further by modifying the straight design of the conducting bar by providing it with the “horn”-type shape. | 01-07-2010 |
20100025382 | STRATEGICALLY PLACED LARGE GRAINS IN SUPERALLOY CASTING TO IMPROVE WELDABILITY - Process for reducing cracking in superalloy metal components by selectively growing large single grains during the casting operation at a region where fusion welding will be required. | 02-04-2010 |
20100032413 | Method and device for the crack-free welding, repair welding, or surface welding of materials prone to forming hot cracks - The invention relates to a method and a device for crack-free welding, repair welding, or buildup welding of metallic materials which are susceptible to hot cracking. Objects in which its application is expedient and advantageous are all components which comprise multiphase solidification alloys having a broad solidification interval or are constructed from alloys which contain alloy elements or contamination elements which form a low-melting-point eutectic material with one or more main alloy elements and which are to be joined using fusion welding methods of high power density. | 02-11-2010 |
20100032414 | INERT GAS MIXTURE AND METHOD FOR WELDING - An inert gas mixture including helium and nitrogen or helium and hydrogen or helium, hydrogen, and nitrogen for use during the welding of a nickel-based or cobalt-based substrate is provided. Also provided is a method for the welding of a substrate in which an inert gas mixture is used. The substrate used in the method may be nickel-based or cobalt-based. | 02-11-2010 |
20100126969 | System and Method for Weld Removal, Cutting, and Gouging With Vacuum Removal of Byproducts - An adjustable vacuum and support system for evacuating particulate matter, smoke, excess gasses, and molten metal from a work area during TIG welding and for providing adjustable support to a welding head. The vacuum system has a vacuum head and a vacuum nozzle. An adjustable mounting bracket arrangement has a first portion fixed to the vacuum head and a second portion securable to the welding head. The bracket arrangement establishes pivotal and slidable couplings between the welding head and the vacuum head. The vacuum nozzle has a support surface for being rested on a surface of a workpiece to support the vacuum head and the welding head. The support surface of the vacuum nozzle can be a base bevel surface at the tip of the nozzle. An opposed suction bevel surface can have a nozzle aperture interposed therealong. | 05-27-2010 |
20100206851 | WELDING OBSERVATION DEVICE - A welding observation apparatus is provided to use partial darkening by a telecentric optical system and a photochromic filter (PCF) as an optical system for filtering light emission from arc discharge in order to verify the welding condition under the welding arc discharge, without forming an image on the PCF, so that light reducing performance can be secured even if a focus shifts from on the PCF, with satisfactory monitoring of welding condition. | 08-19-2010 |
20100224597 | METHOD FOR JOINING TWO ROTATIONALLY SYMMETRICAL METAL PARTS BY TUNGSTEN INERT GAS (TIG) WELDING, AND A DEVICE FOR CARRYING OUT THE METHOD - In a method for joining two, in particular rotationally symmetrical, metal parts ( | 09-09-2010 |
20100258534 | METHOD OF CONVERTING A GAS TUNGSTEN ARC WELDING SYSTEM TO A PLASMA WELDING SYSTEM - A welding system includes a gas tungsten arc welding power source having a welding arc contactor, a plasma welding torch, and a gas console that supplies gases to the plasma welding torch. The welding system also includes a coolant flow switch connected in series with the welding arc contactor. Power is not provided from the gas tungsten arc welding power source to the plasma welding torch when the coolant flow switch is not actuated. | 10-14-2010 |
20110000890 | Potential-Free Wire Heating During Welding and Apparatus Therefor - In conventional hot wire welding, the deposition rate and temperature cannot be adjusted. A process for welding a component in which a heated welding wire is fed to the component is provided. Through the potential-free heating of the welding wire, the deposition rate and temperature may be further increased. A welding apparatus is also provided. | 01-06-2011 |
20110049109 | ENCAPSULATED MAGNET ASSEMBLY AND PROCESS FOR MAKING - A process of forming an encapsulated magnet assembly is provided, the process comprising welding a second portion of a housing cover formed of a non-magnetic material to a first portion of a housing cover formed of a magnetic material to provide a welded housing cover and subsequently heat-treating the welded housing cover at a temperature effective to relieve weld stress; disposing a magnet within a housing comprising at least one wall formed of the non-magnetic material and defining at least one aperture; and welding the heat treated welded housing cover to the housing such that the second portion of the housing cover is fixedly attached to the housing wall to hermetically seal the aperture. In one embodiment, the magnet of the encapsulated magnet assembly is a permanent magnet, and in an alternate embodiment an electromagnet. In one embodiment the encapsulated magnet assembly is a component of a stator-rotor assembly. | 03-03-2011 |
20110062121 | WELDING METHOD FOR THE MANUFACTURE OF A REMOVABLE TOW BAR FOR PRIVATE MOTOR VECHILES - A welding method based on the mig welding process, intended for the manufacture of a removable ball rod for private motor vehicles, which ball rod is built up of a coupling member arranged as a forging and a ball rod produced as a pivoting member, includes welding the two said members together by means of a continuously executed mig welding operation while use is made of a stationary welding gun (or a plurality of stationary welding guns) and a welding manipulator with the two members to be welded together being rotated around a horizontal axis. | 03-17-2011 |
20110062122 | Method of Welding Circuit Conductor and Terminal of Control Apparatus - A method of welding a circuit conductor and one of a plurality of terminals of an electronic component of a control apparatus by melting and joining by a welding arc from a first electrode of a micromini TIG welder, the method includes: using the electronic component including the terminals which are apart from each other; and arc-welding while only the one of the plurality of the terminals of the electronic component of the control apparatus which is to be welded and the circuit conductor to be welded are sandwiched by an earth clamp jig serving as a second electrode so that the one of the plurality of the terminals of the electronic component of the control apparatus which is to be welded and the circuit conductor to be welded are grounded. | 03-17-2011 |
20110163073 | PROCEDURE FOR MAKING A LOW DISTORTION WELDED CONNECTION - In a process to connect components, especially metal components ( | 07-07-2011 |
20110168679 | METHODS FOR TREATING SUPERALLOY ARTICLES, AND RELATED REPAIR PROCESSES - A method is described, for treating a superalloy substrate which includes at least one cavity containing adherent metal oxide material on its surface. A short-pulsed, high repetition rate laser beam is directed against the cavity surface for a period of time sufficient to remove substantially all of the adherent metal oxide material. The laser beam is characterized by a peak power density in the range of about 10 megawatts/cm | 07-14-2011 |
20110198318 | HORIZONTAL WELDING METHOD AND JOINT STRUCTURE THEREFOR - Embodiments of the invention relate generally to welding methods and, more particularly, to methods for welding in a horizontal position and a joint structure suitable for such methods. In one embodiment, the invention provides a method of forming a welded joint between two components, the method comprising: aligning a first and second component to form a joint therebetween, the joint comprising: a protrusion of the first component, and a recess of the second component, wherein the protrusion and recess have complimentary shapes; orienting the first and second components such that a major axis of each is oriented vertically; and welding the first and second components at a substantially horizontally-oriented root opening, the substantially horizontally-oriented root opening positioned along the joint. | 08-18-2011 |
20110266259 | CONTACT TIP AND DIFFUSER - A contact tip includes a first threaded section and a first non-threaded section. The length of the first non-threaded section is at least a fifth of the length of the first threaded section along a longitudinal axis. The contact tip further includes a first contact surface. A diffuser includes a second non-threaded section and a second threaded section configured to mate with the first threaded section of the contact tip. The diffuser further includes a second contact surface. The first non-threaded section is configured to elongate along the longitudinal axis as the first threaded section is screwed into the second threaded section past a point where the first contact surface and the second contact surface have established contact. | 11-03-2011 |
20110272383 | Welding Tool - A welding torch for gas tungsten arc welding, the welding torch including a torch head and a torch handle. The torch head includes a hollow inner body in electrical contact with one terminal of an electric power source, the inner body having an interior through which an axially positioned electrode extends, a free end of the electrode projecting beyond an electrode contact region of the inner body, and there being an inner gas chamber defined above the contact region within the interior of the inner body about the electrode. The torch head also includes a collet that provides the contact region where the inner body is in positive electrical contact with the electrode above the electrode free end, a gas shroud extending around but spaced from the electrode free end to define an outer gas chamber that allows, in use, gas to shield the electrode free end, and means for circulating coolant about or above the contact region to extract heat from the contact region. The inner body also includes at least one gas port allowing shielding gas to pass from the inner gas chamber to the outer gas chamber. | 11-10-2011 |
20120018406 | METHOD OF PRODUCING A MATERIAL JOINT, AND HOLLOW SECTION CONNECTION - In a method of producing a material joint between a hollow section of steel and a structural element of an aluminum material, hollow section is aligned in relation to the structural element in a coupling position. One end of the hollow section is placed upon a shoulder of the structural element, and the end of the hollow section is connected with the structural element by thermal joining, using inert gas shielded arc welding. A welding torch is hereby positioned at an angle of 20° to 40° in relation to an axial direction in a welding position in relation to a joining seam to be realized, and the axial direction is oriented in parallel relationship to a longitudinal axis of the hollow section. | 01-26-2012 |
20120024823 | COLLET ASSEMBLY WITH A UNIVERSAL COLLET - A collet assembly with a universal collet is provided. One collet assembly of a welding torch includes a collet having an outer diameter and an inner diameter. The inner diameter of the collet is configured to contact a welding electrode disposed through the collet. The welding torch also includes a spacer configured to be disposed in a welding torch head and to compress the collet against the welding electrode to secure the welding electrode in the torch. | 02-02-2012 |
20120193328 | METHOD FOR MAKING A HOT WATER TANK OF FERRITIC STAINLESS STEEL WITH A TIG WELDED STRUCTURE - Disclosed is a ferritic stainless steel for hot-water tanks with welded structure, comprising, in terms of % by mass, at most 0.02% of C, from 0.01 to 0.30% of Si, at most 1% of Mn, at most 0.04% of P, at most 0.03% of S, from more than 21 to 26% of Cr, at most 2% of Mo, from 0.05 to 0.6% of Nb, from 0.05 to 0.4% of Ti, at most 0.025% of N, and from 0.02 to 0.3% of Al, and optionally containing at least one of at most 2%, preferably from 0.1 to 2% of Ni and at most 1%, preferably from 0.1 to 1% of Cu, with a balance of Fe and inevitable impurities. | 08-02-2012 |
20120199561 | TIG WELDING METHOD AND APPARATUS - A TIG welding method and apparatus which enable a higher aspect ratio weld zone cross-sectional shape to be obtained and which further can prevent the heat radiated from the weld arc causing the permanent magnets to overheat, specifically a TIG welding method which causes an arc discharge between a workpiece and an electrode of a welding torch to cause the generation of a weld arc, uses permanent magnets to generate a magnetic field around the weld arc, and causes an electromagnetic force which is generated by electromagnetic interaction between the magnetic field and a current to act on a weld pool of the workpiece in welding, the TIG welding method arranging the permanent magnets around the electrode of the welding torch and moving the permanent magnets to make the magnetic field fluctuate and thereby make the drive force of convection which is applied to the weld pool fluctuate. | 08-09-2012 |
20120223057 | GAS TUNGSTEN ARC WELDING USING FLUX COATED ELECTRODES - A method of applying a weld using a gas tungsten arc welding procedure. A filler element is provided to a welding location. The filler element includes a first material used during formation of a weld, and a second material that is capable of producing a slag upon melting thereof. A welding arc provides heat that melts portions of first and second components and the filler element proximate to the welding location to form a weld pool. The second material melts and forms a slag, which flows to an outer surface of the weld pool and shields the weld pool from exposure to reactive elements in the atmosphere. Upon cooling of the weld pool, the weld pool solidifies to form a weld between the first component and the second component. | 09-06-2012 |
20120223058 | NON-CONSUMABLE ELECTRODE TYPE ARC WELDING APPARATUS - A non-consumable electrode type arc welding apparatus includes a torch having an electrode portion and a nozzle, a gas supply that supplies, to the torch, a shielding gas flowing through a gap formed between the electrode portion and the nozzle, a first power source that applies a voltage between the electrode portion and the nozzle to generate a pilot arc, a second power source that applies a voltage between the electrode portion and a work to generate a main arc, and a controller that controls the first power source and the second power source. The electrode portion has an electrode and an electrode holding portion holding a base portion of the electrode, the electrode holding portion has a protrusion protruding toward the nozzle from the side facing the nozzle, and the protrusion and the nozzle are caused contact and separate from each other. | 09-06-2012 |
20120228272 | WELDING APPARATUS FOR INDUCTION MOTOR AND METHOD OF WELDING INDUCTION MOTOR - A welding apparatus for an induction motor includes a fixture operable to support a rotor and rotate the rotor about an axis of rotation of the motor, and a welding head supported adjacent the fixture and operable to weld conductor bars located about the surface of the rotor to the first shorting ring when the fixture supports the rotor. A controller controls the fixture to selectively rotate the rotor. The controller moves the welding head, the fixture, or both, so that the welding head is in a welding position, and causes the welding head to weld the conductor bars to the first shorting ring while remaining in the welding position, with the rotor rotating to create a substantially circular weld path along the first shorting ring. In some embodiments, the conductor bars are welded to both shorting rings simultaneously. A method of welding an induction motor is also provided. | 09-13-2012 |
20120298630 | WELDING APPARATUS HAVING A WIRE PULSER AND METHODS THEREOF - A welding apparatus is provided herein. The apparatus includes a wire source having welding wire, a wire feed drive, and a wire pulser. The wire feed drive drives the welding wire from the wire source. The wire pulser has a first end associated with the wire feed drive and a second end associated with a wire conduit. The wire is fed through the wire conduit to a wire nozzle. The wire pulser increase and decrease the effective length of the wire as the wire moves through the wire conduit from the wire feed drive to the wire nozzle. | 11-29-2012 |
20130008876 | WELDING METHOD - In a Gas Tungsten Arc or Gas Metal Arc welding method for austenitic steel that does not contain Ti or Al in a respective quantity of more than about 0.2% by weight, a welding additive containing Ti and/or Al is used in conjunction with a welding gas that contains nitrogen. | 01-10-2013 |
20130068730 | METHODS FOR WELD PURGING - A method for purging air from a structure to be joined by welding by feeding a liquid cryogen to the structure. The liquid cryogen will enter the structure, warm up and enter the gaseous phase very rapidly. The gaseous cryogen will displace the air that is present in the structure out of the structure and reduce the content of oxygen in the structure to about 10 parts per million when welding can begin. | 03-21-2013 |
20130134134 | BURNER BODY COMPRISING A SECURING SYSTEM; TIG WELDING TORCH COMPRISING SUCH A BURNER BODY - The invention relates to a securing element ( | 05-30-2013 |
20130186866 | AUXILIARY SHIELDING GAS FILTER FOR A WELDING APPARATUS - A shielding gas filter assembly for a welding apparatus. The filter assembly includes a filter housing having a filter disposed therein. The filter assembly also includes a filter guard coupled to the filter housing and configured to receive shielding gas. The filter guard includes a tamper resistant portion configured to inhibit an object from contacting the filter when the object is inserted into the filter guard. | 07-25-2013 |
20130193117 | WELDING TORCH AND ADAPTER KIT - According to the present invention, an adapter kit is provided in which a welding torch having a single nozzle structure is switched to a welding torch having a double nozzle structure. In an adapter kit ( | 08-01-2013 |
20130313230 | Method of Preparing Material for Welding - The present disclosure relates to methods of preparing a material for welding. The material is prepared by utilizing a laser to obliterate contaminants from the material surface. | 11-28-2013 |
20140014627 | METHODS AND SYSTEMS FOR FEEDING FILLER MATERIAL TO A WELDING OPERATION - Methods and systems for feeding a rod of filler wire to a welding operation are provided. For instance, a handheld filler wire advancement device is provided. The device includes a casing having an opening extending axially through the casing for receiving a rod of filler wire. The device also includes a drive assembly disposed within the casing and adapted to contact the rod of filler wire to advance and retract the rod of filler wire within the opening of the casing. Further, the device includes a motor disposed within the casing and coupled to the drive assembly to provide the drive assembly with power for movement of the rod of filler wire. | 01-16-2014 |
20140014628 | METHOD OF WELDING ALLOY ARTICLES - A method of welding alloys having a ductility drop temperature range to limit strain-age cracking. The method involves the use of a welding device to weld a weld area of an article while maintaining temperatures throughout the weld area and a heat affected zone adjacent the weld area within a non-crack sensitive temperature range that is above a ductility drop temperature range of the alloy being welded. During welding, the temperatures of the weld area and the heat affected zone are predominantly controlled with heat input from the welding device. Once the welding has been terminated, the weld area and the heat affected zone are cooled from the non-crack sensitive temperature range through the ductility drop temperature range to a temperature below the ductility drop temperature range of the alloy. | 01-16-2014 |
20140263192 | SHIELDING CUP FOR ORBITAL WELDING - A shielding cup used in connection with a welding torch having a torch head that defines gas outlets for supplying an inert gas to an electrode, the shielding cup including an attachment portion adapted to attach to the torch head; and a nozzle portion extending downward from the attachment portion, wherein the nozzle portion has a depth adapted to be received within the groove and defines an enclosed volume substantially surrounding the electrode, the nozzle portion being open at an outward end, wherein the nozzle portion is adapted to channel the inert gas from the torch head within the volume defined by the nozzle portion. | 09-18-2014 |
20140353289 | METHOD FOR CLOSING AN APERTURE ON A BLADE OF A GAS TURBINE - The invention relates to a method for closing an aperture on a blade of a gas turbine, wherein the blade of the gas turbine comprises a tip end with a top surface and a bottom surface. The aperture is formed on the tip end of the blade, and the aperture includes a peripheral edge. The method includes closing the aperture with a weld formed by means of a Tungsten Inert Gas(TIG) welding process without an insert placed in the aperture. With the technical solution of the present invention, it provides a simple and cost effective solution to close the aperture on the tip end of the blade, dispensing with the conventionally utilized “letter-box”, insert, tip cap and the like. In view of this, process of closing the aperture may be simplified, and the cost incurred may be reduced. Further, premature failure of the blade is prevented. | 12-04-2014 |
20150014284 | HYBRID MIG-TIG OR MAG-TIG WELDING DEVICE - A hybrid MIG-TIG or MAG-TIG welding device including a MIG or MAG welding torch utilizing a consumable wire oriented in a first direction, associated with a TIG welding torch utilizing a non-consumable electrode oriented in a second direction, said first and second directions being substantially coplanar and forming between themselves an angle (α) no less than 5° and no greater than 40° is provided. | 01-15-2015 |
20150027997 | WELDING TORCH, WELDING APPARATUS AND METHOD OF WELDING USING HOLLOW ELECTRODE AND FILLER MATERIAL - A welding torch having guidance means designed to advance a wire-like welding filler material mechanically along an axis at least in a section of the welding torch, a process gas nozzle that coaxially surrounds at least the guidance means, and a welding current connector that is connected in electrically conductive manner to an element of the welding torch that is configured to conduct electrical current. A hollow electrode is provided that surrounds the axis coaxially and as the element configured for conducting current is connected in electrically conductive manner to the welding current connector, wherein the guidance means are designed to advance the wire-like welding filler material in potential free manner. The welding torch may be used as part of a welding apparatus for a variety of welding methods. | 01-29-2015 |
20150041441 | System and Method for Weld Removal, Cutting, and Gouging With Vacuum Removal of Byproducts - A system and method for metalworking using a vacuum to evacuate particulate matter, smoke, excess gas, and molten metal from a work area. The vacuum system has a vacuum head and a vacuum nozzle. A bracket establishes pivotal and slidable couplings between the welding head and the vacuum head. The vacuum nozzle has a support surface for being rested on a surface of a workpiece to support the vacuum head and the welding head. A flow of liquid can be applied to the work area defined by the vacuum nozzle and the welding head to provide cooling and to prevent deleterious overheating and particulate matter accumulation. A V-shaped canal, potentially with a depression in each face thereof, can communicate across a support surface of the vacuum nozzle. | 02-12-2015 |
20150048057 | SEMI-AUTOMATIC WELDING SYSTEM, CONVERSION ADAPTER KIT, AND WELDING TORCH - According to the present invention, a non-consumable electrode type semi-automatic welding system which can conduct welding with high weld deposit and high speed is provided. A welding torch ( | 02-19-2015 |
20150144600 | Stainless steel weldment and pad combined welding method - 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 α; and between bottoms of the butts of the two weldments is kept a gap L of | 05-28-2015 |
20160067811 | CENTRAL NEGATIVE PRESSURE ARC WELDING APPARATUS AND METHOD - The present disclosure relates to a central negative pressure arc welding apparatus and method. Through a pumping gas pipeline from the suction device to hollow tubular electrode, a suction device may establish a stable, high energy density and binding arc beneath hollow tubular electrode. The binding degree, energy density and voltage of arc may be adjusted by changing the value of negative pressure in the center of arc. Accordingly, welding heat input and coefficient of weld may be precisely controlled. This apparatus may further set up central pulsating negative pressure arc by turning on valve periodically to make a periodic negative pressure in the center of arc. This present disclosure both possesses good stability and adaptability of traditional Gas Tungsten Arc Welding and achieves binding arc and good penetration of Plasma Arc Welding. Furthermore, this present disclosure improves the mechanical properties of welded joints. | 03-10-2016 |
20160121423 | TIG WELDING TORCH - The invention relates to a TIG welding torch ( | 05-05-2016 |
20160144441 | LOW HEAT FLUX MEDIATED CLADDING OF SUPERALLOYS USING CORED FEED MATERIAL - Methods are disclosed for melting a cored feed material ( | 05-26-2016 |