WO2017149176A1 - Welding chamber with inert atmosphere - Google Patents

Welding chamber with inert atmosphere Download PDF

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Publication number
WO2017149176A1
WO2017149176A1 PCT/ES2017/070086 ES2017070086W WO2017149176A1 WO 2017149176 A1 WO2017149176 A1 WO 2017149176A1 ES 2017070086 W ES2017070086 W ES 2017070086W WO 2017149176 A1 WO2017149176 A1 WO 2017149176A1
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WO
WIPO (PCT)
Prior art keywords
welding
inert atmosphere
receptacle
chamber
cover
Prior art date
Application number
PCT/ES2017/070086
Other languages
Spanish (es)
French (fr)
Inventor
Manuel PASCUAL GUILLAMÓN
Francisco Javier CARCEL CARRASCO
Original Assignee
Universitat Politècnica De València
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Filing date
Publication date
Application filed by Universitat Politècnica De València filed Critical Universitat Politècnica De València
Publication of WO2017149176A1 publication Critical patent/WO2017149176A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories

Definitions

  • the purpose of this application is to register a welding chamber with an inert atmosphere that incorporates notable innovations. More specifically, the invention proposes the development of a chamber for welding in an inert atmosphere that facilitates the welding process with a minimum loss of gas and a simple and reliable configuration.
  • Highly oxidizable metals must be protected to avoid very harmful corrosive phenomena when welding at relatively high temperatures.
  • An example of such highly oxidizable metals is titanium that rapidly forms oxides of Titanium in contact with oxygen. If titanium is welded, contact with oxygen should be avoided so as not to cause oxidation of the weld. Said oxidation would cause the formation of porosities in the welded joint, damaging its mechanical properties.
  • the Chinese utility model document CN201862936 U describes a portable camera with protective gas inside it for welding comprising a box, a perforated copper plate, gas inlets, openings to facilitate the welding operation, a side inlet, hinges, a metal waste recovery layer, a copper mesh and a transparent top cover.
  • This document presents a constructive complexity, requiring the passage of pipes for the gas supply, in addition the gas can only be applied from below, limiting the efficiency of the inert gas to fill the entire welding chamber.
  • the lid can only be opened through hinges and is not sliding so that the user cannot move the soldering iron along the joint to achieve a suitable weld seam.
  • the relative dimensions of the device are relatively bulky.
  • Chinese utility model document CN203843350 U describes a closed rectangular stainless steel case to generate a protective gas atmosphere during the welding process.
  • the box comprises side walls with earmuffs for the top cover that has an opening for welding, a hole to which the tube for the introduction of gas is attached.
  • an opening for welding with an elongated configuration for tracing the soldering iron, however, it implies a relatively large surface through which inert gas leaks outside. Neither is the lateral supply of inert gas on the area to be welded.
  • the relative dimensions of the device are relatively bulky.
  • the Chinese utility model document CN203448845 U describes a process for repair of defects (holes, marks, etc.) in titanium plates by welding, which comprises a box formed in turn by two transparent glass boxes, one upper and one bottom sealed by means of a gasket, a top inlet for the welding gun, a top inlet for titanium or titanium alloy rod, an inlet and an outlet in the upper case and an inlet and an outlet In the lower box.
  • the inside of the box is emptied of air and filled with protective gas. Again a relatively bulky solution is described. It has a limited use for the repair of specific defects with an entry for welding tools equipped with sealing sleeves.
  • the expert would not see the possibility of making a weld bead comfortably since the opening to introduce the welding tool is not movable.
  • the gas supply is produced from the bottom of the box, without being able to control the direction where the inert gas is applied and concentrated.
  • US patent document US2009230094 A1 describes a compact chamber to protect the welding of refractory metals such as titanium with a cloud of inert gas such as argon, composed of an accumulation chamber, which has an inlet for gas, a gas diffuser porous, a welding bed made of a conductive and gas permeable material above the accumulation chamber, a curtain barrier made of a non-conductive gas-impermeable material, located above the welding bed and having an opening at the top for the placement of the work piece.
  • US Patent US2008029496 A1 describes a two-piece welding process that is part of the head of a golf club. These parts are placed in a welding device, which includes a chamber, an inert gas supplier in the chamber, a positioner mounted in the chamber for positioning the parts and a laser light generator mounted outside the chamber to generate a laser light beam
  • a welding device which includes a chamber, an inert gas supplier in the chamber, a positioner mounted in the chamber for positioning the parts and a laser light generator mounted outside the chamber to generate a laser light beam
  • the camera is provided with a glass window that allows the transmission of the laser light beam.
  • This solution requires the use of a laser light beam and does not provide for the introduction of tools such as torches or the like. In other words, it represents a fairly complex solution that, when closed, minimizes inert gas losses.
  • Spanish utility model document ES1052917 U describes a portable protective gas chamber for welding metal pipes, especially titanium, which consists of two crowns and a ring. On the outer face of the crowns there is a fitting that is used to connect to the gas source and through which the inert or protective gas is introduced.
  • the ring has an opening where welding of the tubes while visually inspecting the process and a handle for rotation.
  • the crowns are constituted by two sections, cover and ring conveniently mechanized and joined so that its interior allows to accommodate a distributor plate to ensure a balanced distribution of the gas through all the exit holes of the crowns.
  • This invention is directed to the welding of two pipes to each other, applying a welding bead.
  • the solution is not intended for joining other pieces, for example flat ones, nor does it allow the inert gas to be fed around the entire welding section and also requires the use of an intermediate plate to ensure that the inert gas is distributed.
  • the present invention has been developed in order to provide a welding chamber with an inert atmosphere that solves the aforementioned drawbacks, also providing additional advantages that will be apparent from the description that follows.
  • a welding chamber with an inert atmosphere comprising:
  • an oblong chamber body which in turn comprises a main base and a cover linked to each other by a plurality of main side walls,
  • a receptacle disposed as a cavity in the cover comprising a secondary base linked to the cover by means of secondary side walls,
  • feeding means comprising at least one input in fluid communication with at least one elongated diffuser, in which the input is arranged in the chamber body and is linkable to a gas source, and the diffuser being arranged in the receptacle,
  • a lid linkable to the receptacle such that a welding space is defined, in which the lid comprises at least one transparent portion with a susceptible opening and sized for the introduction of a welding device, in which at least the transparent portion is slidable with respect to the receptacle.
  • the device is designed avoiding electrical and electronic components that can be easily affected by the heat generated in the welding process, increasing its durability.
  • the inert gas outlets inside the receptacle by means of a diffuser / is elongated / s linear / s that channel the inert gas outlet through the lateral and / or lower parts of the welding plate, in order to completely isolate the welding of the oxygen in the air that would cause oxidation in the weld. This prevents the formation of porosities in the welded joint.
  • this elongated or linear diffuser system in addition to achieving the inert chamber, the formation of turbulence is avoided and the inert gas applied directly to the weld is directed, in a very similar way as the ceramic nozzle would of the TIG welding gun. The latter provides the welding operator with greater naturalness and availability to perform the welding process.
  • the secondary side walls may comprise elongated grooves that can receive the tongue and groove, while guiding the sliding of the lid with respect to the receptacle.
  • the cover can comprise an elongated slide, with a pair of guides arranged on both sides of the slide and in which the transparent portion is capable of being positioned between both guides, so that the opening slides along the slide.
  • the lid may be made of a heat conducting material. This solution contributes significantly to the evacuation of heat from the assembly throughout the chamber body and therefore increases the durability of the assembly.
  • the opening can advantageously have a circular configuration with at least one elongated extension, as a keyhole. This suitable form of the opening where the gun and the rod is located, prevents the leakage of inert gas, achieving greater sealing of the chamber and avoiding in greater measure the leakage of inert gas.
  • at least one side channel can be defined between the cover, the main base, a main side wall and a secondary side wall, the side channel being in fluid communication with the receptacle through an elongated diffuser in the direction longitudinal and arranged in a secondary side wall.
  • this channel guarantees the supply of inert gas laterally on the weld through a diffuser arranged in a secondary side wall. It also contributes to a compact design of the camera body, optimizing the available space, without the need to introduce pipes inside the chamber.
  • the supply of inert gas to the welding space is guaranteed to direct it to the lateral and upper part of the welding to be carried out.
  • at least one central channel can be defined between the main base and the secondary base, the central channel being in fluid communication with the receptacle through an elongated diffuser in the longitudinal direction and arranged in the secondary base. This central channel guarantees the flow of inert gas to be distributed specifically through the lower part of the weld in the welding space, without the need to introduce pipes.
  • the at least one central channel 100 can be arranged between a pair of side channels 101, 102. This configuration represents an optimal use of the available space, reducing the dimensions of the camera body.
  • two main side walls can have two chamfers opposite each other, such that the chamber body has a region, at least partially hollow, with a "V" shaped plan view, in which the Gas inlet is arranged in a narrow area of the "V" so that the path of passage of the gas widens in the direction of the diffusers.
  • V shape should be understood as synonymous with a flared shape in which the ends extend divergently from each other from a narrow area.
  • the receptacle may comprise two elongated diffusers provided on two secondary side walls facing each other, and a diffuser on the secondary base, the diffusers being arranged in the longitudinal direction of the chamber body.
  • the secondary base can comprise at least two plates separated from each other with flanges facing each other and oriented to the welding space such that an elongated diffuser is configured between both plates.
  • These flanges also allow the pieces to be welded to be guided along and fixed in the receptacle.
  • the main base and the secondary base can be removable to facilitate the placement and handling of the pieces to be welded.
  • the transparent portion may be made of thermal glass.
  • Figure 2. It is an exploded schematic view of the chamber of Figure 1;
  • Figure 3. It is a schematic and perspective view of a part of the chamber during its assembly
  • Figure 4. It is a schematic and perspective view of the chamber of Figure 3 with the trajectory of an inert fluid represented;
  • the welding chamber with an inert atmosphere comprises an oblong chamber body 1 which in turn comprises a main base 2 and a cover 3 linked to each other by a plurality of main side walls 22, 23, 24 25.
  • This gas can be argon, helium or any other depending on the particular needs of each case.
  • it also comprises a receptacle 4 disposed as a cavity in the cover 3 comprising a secondary base 41 linked to the cover 3 by means of secondary side walls 42, 43, 44, 45.
  • the secondary side wall 45 coincides with the main side wall 24 (see figure 2), but logically they could be different elements.
  • welding be carried out on the parts to be joined or repaired.
  • the material for manufacturing the chamber body 1 comprising the receptacle 4 may preferably be metallic, or any other capable of withstanding welding temperatures or chemical reactions developed during welding.
  • This receptacle 4 arranged as a cavity, logically has to be sealed to avoid or greatly reduce the consumption of inert gas during welding.
  • a lid 30 linked to said receptacle 4 is provided so that a welding space is defined, in which the lid 30 preferably comprises a transparent portion 31 with a susceptible opening 32 and sized for the introduction of a device welding (not shown).
  • the opening 32 preferably has a circular configuration with an elongated extension, as a keyhole. It is evident that the shape may vary to adapt to the configuration of the welding device used. This adopted form responds to the need to place a gun and a welding rod.
  • the number of transparent portions 31 and the number of openings 32 may vary depending on each case.
  • at least the transparent portion 31 with its opening 32 is slidable with respect to the receptacle 4, although it may be the entire lid 30 as a whole that is slidable with respect to the receptacle 4.
  • the lid 30 comprises a slide 37 elongated, with a pair of guides 33 arranged on both sides of the slide 37 and in which the transparent portion 31 is capable of being positioned between both guides 33, so that the opening 32 slides along the slide 37.
  • the cover 30 is preferably made of a heat conductive material, for example a metal and the transparent portion 31 is preferably made of methacrylate or thermal glass, depending on the needs of evacuation and heat resistance.
  • the present cover 30 is sized so that it has ends 38 of "L" cross-section, on both sides with respect to the longitudinal direction, so that they fit with the corners formed by the cover 3 and the main side walls 22 and 23. Thus, it will be possible to slide the cover 30 with respect to the rest of the chamber body 1, especially with respect to the receptacle 4.
  • the majority of the cover 30 can be made of metal with the transparent portion 31 located between both ends of the section in "L".
  • the present chamber also comprises feeding means comprising an input 200 in fluid communication with elongated diffusers 501, 502, 503.
  • the inlet 200 is arranged in the chamber body 1, for example in a main side wall 25 and can be linked to an external gas source (not shown).
  • the gas source can be for example a gas bottle.
  • elongated or linear diffusers 501, 502, 503 are arranged in the receptacle 4 and longitudinally in relation to the length of the chamber body 1. When considered linear, their length is greater than their width. On the other hand it is preferred that the diffusers 501, 502, 503 cover the entire length of the receptacle 4 to improve the diffusion of inert gas over the area where the welding is performed, although in other variants the diffusers 501, 502, 503 may have a slightly shorter length.
  • the receptacle 4 comprises two elongated diffusers 502, 503 provided on two secondary side walls 42, 43 facing each other, and a diffuser 501 on the secondary base 41.
  • a pair of side channels 101, 102 are defined between the cover 3, the main base 2, respectively a main side wall 22, 23 and respectively a secondary side wall 42, 43.
  • These channels sides 101, 102 are in fluid communication with the receptacle 4 through the elongated diffusers 502, 503 respectively arranged on a pair of secondary side walls 42, 43 facing each other and partially defining each of the side channels 101, 102.
  • the secondary side walls 42, 43 can act as spacers between the side channels 101, 102 and the central channel 100, so that the latter runs between the side channels 101, 102.
  • the chamber body 1 of the chamber comprises a pair of main side walls 22, 23 having two chamfers 26, 27 opposite each other, such that the chamber body 1 has a region 600 at least partially hollow , in the form of a "V" plan view, in which the gas inlet 200 is arranged in a narrow area of the "V" so that the passage path T of the inert gas widens in the direction of the diffusers 501, 502, 503.
  • the secondary base 41 comprises a pair of plates 41 A, 41 B separated from each other, with individual flanges 46C, 46D facing each other and oriented to the welding space, so that the elongated diffuser 501 is configured between the two plates 41 A, 41 B.
  • the diffusers 502, 503 of the secondary side walls 42, 43 are also formed from the combination of two pairs of flanges 36A and 46A, 36B and 46B, which are oriented towards the welding space formed by the receptacle 4 capable of being linked to the cover 30.
  • the flanges 36A and 36B are linked to respective portions 34 and 35 of the cover 3 and the flanges 46A and 46B are linked to the respective secondary side walls 42 and 43.
  • the secondary side walls 42, 43, 44, 45 may comprise elongated grooves 401, 402 capable of receiving the tongue-and-groove lid 30.
  • These slits 401, 402 can be configured from the flanges 36A, 36B on which a cover 30 can slide slidably.
  • the main base 2 and the secondary base 41 can be removable, for example by sliding, articulation, etc.
  • a preferred and simple way is to join the various loose pieces, for example by welding.
  • the operator can place the parts to be welded in the receptacle 4. Thanks to the protruding configuration of the flanges 46C, 46D, it is helped to correctly place the parts to be welded.
  • the lid 30 is closed and the inert gas supply is introduced, which is introduced through the inlet 200 and distributed without turbulence through the hollow portion 600, and is directed and distributed through the side channels 101, 102 and through the channel central 100.
  • the inert gas then flows through the diffusers 501, 502, 503 and the inert gas is directed towards the welding space defined by the receptacle 4 and the cover 30.
  • the user can insert a gun and a rod (not shown) through the opening 32 and would slide to perform the welding, for example in the form of a bead. Thanks to the slide 37 and the transparent portion 31 slidable with the opening 32 it is possible to do so.
  • the lateral channels 101, 102 and the central channel 100 distribute the inert gas through the bottom of the weld and through the sides, providing total protection of the weld against oxygen.

Abstract

A welding chamber with an inert atmosphere comprises: an oblong chamber body comprising a main base and a cover interconnected by a plurality of main lateral walls, a receptacle arranged as a cavity in the cover, which comprises a secondary base linked to the cover by secondary lateral walls, inert gas supply means comprising an inlet in fluid communication with diffusers, the inlet being arranged in the body of the chamber and the diffuser in the receptacle, a lid that can be linked to the receptacle so as to define a welding space, the lid comprising a transparent portion with an opening sized for the insertion of a welding device, and the transparent portion being movable relative to the receptacle.

Description

DESCRIPCIÓN  DESCRIPTION
Cámara para soldadura con atmósfera inerte OBJETO DE LA INVENCIÓN Welding chamber with inert atmosphere OBJECT OF THE INVENTION
La presente solicitud tiene por objeto el registro de una cámara para soldadura con atmósfera inerte que incorpora notables innovaciones. Más concretamente, la invención propone el desarrollo de una cámara para la realización de soldaduras en una atmósfera inerte que facilita el proceso de soldadura con una pérdida mínima de gas y una configuración sencilla y fiable. The purpose of this application is to register a welding chamber with an inert atmosphere that incorporates notable innovations. More specifically, the invention proposes the development of a chamber for welding in an inert atmosphere that facilitates the welding process with a minimum loss of gas and a simple and reliable configuration.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
Los metales altamente oxidables se deben proteger para evitar los fenómenos corrosivos muy perjudiciales cuando se suelda en temperatura relativamente elevadas. Un ejemplo de dichos metales altamente oxidables lo constituye el titanio que rápidamente forma óxidos de Titanio en contacto con el oxígeno. Si se procede a soldar titanio, se debe evitar el contacto con el oxígeno para no provocar la oxidación de la soldadura. Dicha oxidación produciría la formación de porosidades en la unión soldada, perjudicando sus propiedades mecánicas. Highly oxidizable metals must be protected to avoid very harmful corrosive phenomena when welding at relatively high temperatures. An example of such highly oxidizable metals is titanium that rapidly forms oxides of Titanium in contact with oxygen. If titanium is welded, contact with oxygen should be avoided so as not to cause oxidation of the weld. Said oxidation would cause the formation of porosities in the welded joint, damaging its mechanical properties.
Para evitar el contacto con el oxígeno suelen emplearse útiles que permitan crear una atmosfera inerte que proteja la soldadura mediante el aporte de gas inerte, como por ejemplo argón, que evite toda contaminación a alta temperatura de los ambientes naturales corrosivos. To avoid contact with oxygen, tools that allow the creation of an inert atmosphere that protect the weld by means of the supply of inert gas, such as argon, which avoid any high temperature contamination of corrosive natural environments are often used.
El documento de modelo de utilidad chino CN201862936 U describe una cámara portátil con gas protector en su interior para soldar que comprende una caja, una placa de cobre perforada, entradas para el gas, unas aberturas para facilitar la operación de soldadura, una entrada lateral, unas bisagras, una capa recuperadora de residuos metálicos, una malla de cobre y un tapa superior transparente. Este documento presenta una complejidad constructiva, al requerir el paso de tuberías para la alimentación de gas, además el gas solo puede aplicarse desde abajo, limitando la eficiencia del gas inerte para llenar toda la cámara de soldadura. Por otro lado, la tapa solo puede abrirse a través de unas bisagras y no es deslizable por lo que el usuario no puede desplazar el útil soldador a lo largo de la unión para conseguir un cordón de soldadura adecuado. Las dimensiones relativas del dispositivo son relativamente voluminosas. El documento de modelo de utilidad chino CN203843350 U describe una caja rectangular cerrada de acero inoxidable para generar una atmósfera protectora de gas durante el proceso de soldadura. La caja comprende unas paredes laterales con orejeras para la tapa superior que dispone de una abertura para la soldadura, un orificio al que se acopla el tubo para la introducción del gas. De nuevo se presenta una construcción compleja que requiere la introducción de una tubería en el interior de la caja; además se presenta una abertura para la soldadura de configuración alargada para el trazado del útil soldador, sin embargo supone una superficie relativamente grande por la que se fuga gas inerte al exterior. Tampoco está prevista la alimentación lateral de gas inerte sobre la zona a soldar. Las dimensiones relativas del dispositivo son relativamente voluminosas. The Chinese utility model document CN201862936 U describes a portable camera with protective gas inside it for welding comprising a box, a perforated copper plate, gas inlets, openings to facilitate the welding operation, a side inlet, hinges, a metal waste recovery layer, a copper mesh and a transparent top cover. This document presents a constructive complexity, requiring the passage of pipes for the gas supply, in addition the gas can only be applied from below, limiting the efficiency of the inert gas to fill the entire welding chamber. On the other hand, the lid can only be opened through hinges and is not sliding so that the user cannot move the soldering iron along the joint to achieve a suitable weld seam. The relative dimensions of the device are relatively bulky. Chinese utility model document CN203843350 U describes a closed rectangular stainless steel case to generate a protective gas atmosphere during the welding process. The box comprises side walls with earmuffs for the top cover that has an opening for welding, a hole to which the tube for the introduction of gas is attached. Again a complex construction is presented that requires the introduction of a pipe inside the box; In addition, there is an opening for welding with an elongated configuration for tracing the soldering iron, however, it implies a relatively large surface through which inert gas leaks outside. Neither is the lateral supply of inert gas on the area to be welded. The relative dimensions of the device are relatively bulky.
El documento de modelo de utilidad chino CN203448845 U describe un proceso para reparación de defectos (agujeros, marcas, etc.) en placas de titanio mediante soldadura, que comprende una caja formada a su vez por dos cajas transparentes de cristal, una superior y una inferior selladas por medio de una junta, una entrada superior para la pistola de soldadura, una entrada superior para varilla de titanio o aleación de titanio, un orificio de entrada y uno de salida en la caja superior y un orificio de entrada y uno de salida en la caja inferior. El interior de la caja se vacía de aire y se llena con gas protector. De nuevo se describe una solución relativamente voluminosa. Presenta un uso limitado a la reparación de defectos puntuales con una entrada para útiles de soldadura dotada de manguitos para la estanqueidad. No obstante esta solución no permite que el útil soldador pueda desplazarse para realizar un cordón de soldadura, con una abertura que deslice relativamente respecto a la cámara de soldadura. Tampoco está prevista la alimentación lateral de gas inerte sobre la zona a soldar. El documento de modelo de utilidad chino CN202271 106 U describe un proceso de soldadura de titanio con atmósfera protectora que comprende un caja de acero inoxidable, medios de ajuste, molde para soldar, un soplete de soldadura, una guía, un tubo para el gas, una abertura sobre la caja para el soplete, orificio de entrada en la caja para el tubo, un orificio de salida en la caja para el tubo, una ventana transparente sobre la caja, juntas de goma, tubo de entrada de gas protector, eje motriz. Es una solución compleja y voluminosa con medios de ajuste, tubería de suministro de gas inerte por el interior de la caja y una ventana para observar el proceso de soldadura. El experto no vería la posibilidad de realizar un cordón de soldadura de forma cómoda puesto que la abertura para introducir el útil de soldadura no es desplazable. Además la alimentación de gas se produce desde la parte inferior de la caja, sin poder controlar la dirección donde aplica y se concentra el gas inerte. The Chinese utility model document CN203448845 U describes a process for repair of defects (holes, marks, etc.) in titanium plates by welding, which comprises a box formed in turn by two transparent glass boxes, one upper and one bottom sealed by means of a gasket, a top inlet for the welding gun, a top inlet for titanium or titanium alloy rod, an inlet and an outlet in the upper case and an inlet and an outlet In the lower box. The inside of the box is emptied of air and filled with protective gas. Again a relatively bulky solution is described. It has a limited use for the repair of specific defects with an entry for welding tools equipped with sealing sleeves. However, this solution does not allow the useful soldering iron to be able to move to make a weld bead, with an opening that slides relative to the welding chamber. Neither is the lateral supply of inert gas on the area to be welded. Chinese utility model document CN202271 106 U describes a titanium welding process with protective atmosphere comprising a stainless steel case, adjustment means, welding mold, a welding torch, a guide, a gas pipe, an opening on the torch box, inlet hole in the tube box, an outlet hole in the tube box, a transparent window on the box, rubber gaskets, protective gas inlet tube, drive shaft . It is a complex and bulky solution with adjustment means, inert gas supply pipe inside the box and a window to observe the welding process. The expert would not see the possibility of making a weld bead comfortably since the opening to introduce the welding tool is not movable. In addition, the gas supply is produced from the bottom of the box, without being able to control the direction where the inert gas is applied and concentrated.
El documento de patente estadounidense US2009230094 A1 describe una cámara compacta para proteger la soldadura de metales refractarios como el titanio con una nube de gas inerte como el argón, compuesta por una cámara de acumulación, que dispone de entrada para el gas, un difusor de gas poroso, una cama de soldadura hecha de un material conductor y permeable al gas encima de la cámara de acumulación, una barrera de cortina hecha de un material no conductor impermeable a los gases, situada encima de la cama de soldadura y que dispone de una abertura en la parte superior para la colocación de la pieza de trabajo. Es una solución especialmente voluminosa, que requiere de la introducción de una tubería de gas, y debido a la configuración relativamente grande de la abertura para introducir las piezas a soldar y el útil soldador, se produce pérdidas importantes de gas inerte que han de compensarse con un consumo más elevado del mismo. Tampoco se garantiza que todos los puntos de la soldadura queden adecuadamente protegidos por la atmósfera inerte, puesto que el gas se distribuye desde la parte inferior. US patent document US2009230094 A1 describes a compact chamber to protect the welding of refractory metals such as titanium with a cloud of inert gas such as argon, composed of an accumulation chamber, which has an inlet for gas, a gas diffuser porous, a welding bed made of a conductive and gas permeable material above the accumulation chamber, a curtain barrier made of a non-conductive gas-impermeable material, located above the welding bed and having an opening at the top for the placement of the work piece. It is a particularly bulky solution, which requires the introduction of a gas pipe, and due to the relatively large configuration of the opening to introduce the parts to be welded and the useful soldering iron, there are significant losses of inert gas that have to be compensated with a higher consumption of it. Nor is it guaranteed that all welding points are adequately protected by the inert atmosphere, since the gas is distributed from the bottom.
El documento de patente estadounidense US2008029496 A1 describe un proceso de soldadura de dos piezas que forman parte de la cabeza de un palo de golf. Dichas piezas se colocan en un dispositivo de soldadura, que incluye una cámara, un suministrador de gas inerte en la cámara, un posicionador montado en la cámara para el posicionamiento de las piezas y un generador de luz láser montado fuera de la cámara para generar un haz de luz láser. La cámara está provista de una ventana de cristal que permite la transmisión del haz de luz láser. Esta solución requiere el uso de un haz de luz láser y no tiene previsto la introducción de útiles como antorchas o similares. Es decir representa una solución bastante compleja que al estar cerrada minimiza las pérdidas de gas inerte. US Patent US2008029496 A1 describes a two-piece welding process that is part of the head of a golf club. These parts are placed in a welding device, which includes a chamber, an inert gas supplier in the chamber, a positioner mounted in the chamber for positioning the parts and a laser light generator mounted outside the chamber to generate a laser light beam The camera is provided with a glass window that allows the transmission of the laser light beam. This solution requires the use of a laser light beam and does not provide for the introduction of tools such as torches or the like. In other words, it represents a fairly complex solution that, when closed, minimizes inert gas losses.
El documento de modelo de utilidad español ES1052917 U describe una cámara portátil de gas protector para soldadura de tubos metálicos, especialmente de titanio, que está constituida por dos coronas y por un anillo. En la cara exterior de las coronas se dispone de un racor que sirve para la conexión con la fuente de gas y por el cual se introduce el gas inerte o protector. El anillo dispone de una abertura por donde se efectúa la soldadura de los tubos a la vez que se inspecciona visualmente el proceso y de un tirador para su giro. Las coronas están constituidas por dos secciones, tapa y aro convenientemente mecanizadas y unidas de modo que su interior permite alojar una placa distribuidora para asegurar un reparto equilibrado del gas por todos los orificios de salida de las coronas. Esta invención está dirigida a la soldadura de dos tuberías entre sí, aplicando un cordón de soldadura. La solución no está pensada para la unión de otras piezas por ejemplo planas, tampoco permite la alimentación de gas inerte alrededor de toda la sección de soldadura y además requiere el uso de una placa intermedia para garantizar que se distribuya el gas inerte. Spanish utility model document ES1052917 U describes a portable protective gas chamber for welding metal pipes, especially titanium, which consists of two crowns and a ring. On the outer face of the crowns there is a fitting that is used to connect to the gas source and through which the inert or protective gas is introduced. The ring has an opening where welding of the tubes while visually inspecting the process and a handle for rotation. The crowns are constituted by two sections, cover and ring conveniently mechanized and joined so that its interior allows to accommodate a distributor plate to ensure a balanced distribution of the gas through all the exit holes of the crowns. This invention is directed to the welding of two pipes to each other, applying a welding bead. The solution is not intended for joining other pieces, for example flat ones, nor does it allow the inert gas to be fed around the entire welding section and also requires the use of an intermediate plate to ensure that the inert gas is distributed.
Hay por tanto una necesidad de un dispositivo sencillo, cómodo y eficaz que resuelva los problemas citados anteriormente a la hora de efectuar soldaduras en atmósferas inertes. There is therefore a need for a simple, comfortable and efficient device that solves the problems mentioned above when welding in inert atmospheres.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
La presente invención se ha desarrollado con el fin de proporcionar una cámara para soldadura con atmósfera inerte que resuelva los inconvenientes anteriormente mencionados, aportando, además, otras ventajas adicionales que serán evidentes a partir de la descripción que se acompaña a continuación. The present invention has been developed in order to provide a welding chamber with an inert atmosphere that solves the aforementioned drawbacks, also providing additional advantages that will be apparent from the description that follows.
En la presente memoria el uso de los términos, longitudinal, superior, inferior, lateral, frontal se entenderá en una condición de reposo. In the present specification the use of the terms, longitudinal, upper, lower, lateral, frontal will be understood in a resting condition.
Es por tanto un objeto de la presente solicitud una cámara para soldadura con atmósfera inerte que comprende: It is therefore an object of the present application a welding chamber with an inert atmosphere comprising:
un cuerpo de cámara oblongo que comprende a su vez una base principal y una cubierta vinculadas entre sí por una pluralidad de paredes laterales principales, an oblong chamber body which in turn comprises a main base and a cover linked to each other by a plurality of main side walls,
un receptáculo dispuesto a modo de cavidad en la cubierta que comprende una base secundaria vinculada a la cubierta mediante unas paredes laterales secundarias, a receptacle disposed as a cavity in the cover comprising a secondary base linked to the cover by means of secondary side walls,
unos medios de alimentación que comprenden por lo menos una entrada en comunicación fluida con por lo menos un difusor alargado, en el que la entrada está dispuesta en el cuerpo de cámara y es vinculable a una fuente de gas, y el difusor estando dispuesto en el receptáculo, feeding means comprising at least one input in fluid communication with at least one elongated diffuser, in which the input is arranged in the chamber body and is linkable to a gas source, and the diffuser being arranged in the receptacle,
una tapa vinculable al receptáculo de forma que se define un espacio de soldadura, en el que la tapa comprende por lo menos una porción transparente con una abertura susceptible y dimensionada para la introducción de un dispositivo de soldadura, en el que por lo menos la porción transparente es deslizable respecto al receptáculo. a lid linkable to the receptacle such that a welding space is defined, in which the lid comprises at least one transparent portion with a susceptible opening and sized for the introduction of a welding device, in which at least the transparent portion is slidable with respect to the receptacle.
Gracias a estas características se consigue una cámara con un receptáculo o recinto cerrado que a través de unos difusores alargados, particularmente lineales, se inyecta atmosfera inerte sobre el entorno de la soldadura, permitiendo el desplazamiento del oxígeno con lo que consigue que el material soldado quede exento de contaminación por efecto del oxígeno del aire. El presente dispositivo permite de una manera simple, efectiva y económica realizar esta función de soldadura en ambientes inertes, que impidan la contaminación. Se garantiza una máxima simplicidad en los elementos, lo cual facilita el mantenimiento, evita fallos y aumenta su facilidad de transporte. En cuanto a su uso puede estar enfocado a centros de enseñanza y universidades, así como en empresas que realicen soldaduras de este tipo. Thanks to these characteristics, a chamber with a closed receptacle or enclosure is achieved which, through elongated diffusers, particularly linear, inert atmosphere is injected over the welding environment, allowing the displacement of oxygen, which allows the welded material to remain free from contamination due to the oxygen effect of the air. This device allows a simple, effective and economical way to perform this welding function in inert environments that prevent contamination. Maximum simplicity in the elements is guaranteed, which facilitates maintenance, prevents failures and increases its ease of transport. As for its use, it can be focused on schools and universities, as well as companies that carry out welding of this type.
El dispositivo está diseñado evitándose componentes eléctricos y electrónicos que pueden ser fácilmente afectados por el calor generado en el proceso de soldeo, aumentando su durabilidad. The device is designed avoiding electrical and electronic components that can be easily affected by the heat generated in the welding process, increasing its durability.
La tapa puede deslizarse respecto al receptáculo mientras se va realizando la soldadura, con una pérdida mínima de gas, garantizando así la protección del proceso de soldadura. El consumo de gas inerte se optimiza respecto al estado de la técnica mientras se garantiza la comodidad a la hora de efectuar un cordón de soldadura sobre piezas de cualquier geometría. The lid can slide with respect to the receptacle while welding, with a minimum loss of gas, thus ensuring the protection of the welding process. Inert gas consumption is optimized with respect to the state of the art while ensuring comfort when making a welding bead on parts of any geometry.
Las salidas de gas inerte en el interior receptáculo mediante un/os difusor/es alargado/s lineal/es que canalizan la salida de gas inerte por las partes laterales y/o inferiores de la chapa de soldeo, con el fin de aislar completamente la soldadura del oxígeno del aire que provocaría la oxidación en la soldadura. Con ello se evita la formación de porosidades en la unión soldada. Con este sistema de difusor alargado o lineal además de conseguir la cámara inerte, se evita la formación de turbulencias y se dirige el gas inerte aplicado directamente sobre la soldadura, de manera muy similar como lo haría la boquilla cerámica de la pistola de soldadura TIG. Esto último proporciona al operador de soldadura mayor naturalidad y disponibilidad para realizar el proceso de soldadura. The inert gas outlets inside the receptacle by means of a diffuser / is elongated / s linear / s that channel the inert gas outlet through the lateral and / or lower parts of the welding plate, in order to completely isolate the welding of the oxygen in the air that would cause oxidation in the weld. This prevents the formation of porosities in the welded joint. With this elongated or linear diffuser system in addition to achieving the inert chamber, the formation of turbulence is avoided and the inert gas applied directly to the weld is directed, in a very similar way as the ceramic nozzle would of the TIG welding gun. The latter provides the welding operator with greater naturalness and availability to perform the welding process.
De acuerdo con una característica de la presente invención, las paredes laterales secundarias pueden comprender unas hendiduras alargadas susceptibles de recibir la tapa de forma machihembrada, a la vez que se consigue guiar el deslizamiento de la tapa respecto al receptáculo. In accordance with a feature of the present invention, the secondary side walls may comprise elongated grooves that can receive the tongue and groove, while guiding the sliding of the lid with respect to the receptacle.
La tapa puede comprender una corredera alargada, con un par de guías dispuestas a ambos lados de la corredera y en la que la porción transparente es susceptible de posicionarse entre ambas guías, de forma que la abertura deslice a lo largo de la corredera. Esta configuración permite mejorar la resistencia del conjunto, ya que se limita el uso de material transparente, relativamente menos resistente que el del resto del cuerpo de cámara. The cover can comprise an elongated slide, with a pair of guides arranged on both sides of the slide and in which the transparent portion is capable of being positioned between both guides, so that the opening slides along the slide. This configuration allows to improve the resistance of the assembly, since the use of transparent material, relatively less resistant than that of the rest of the camera body is limited.
La tapa puede estar fabricada en un material conductor del calor. Esta solución contribuye notablemente a la evacuación de calor del conjunto por todo el cuerpo de cámara y por tanto aumenta la durabilidad del conjunto. La abertura puede presentar ventajosamente una configuración circular con por lo menos una extensión alargada, a modo de ojo de cerradura. Esta forma adecuada de la abertura donde se sitúa la pistola y la varilla, evita la fuga de gas inerte, consiguiéndose mayor estanqueidad de la cámara y evitándose en mayor medida la fuga de gas inerte. De forma ventajosa, se puede definir por lo menos un canal lateral entre la cubierta, la base principal, una pared lateral principal y una pared lateral secundaria, estando el canal lateral en comunicación fluida con el receptáculo a través de un difusor alargado en la dirección longitudinal y dispuesto en una pared lateral secundaria. La disposición de este canal garantiza el aporte de gas inerte lateralmente sobre la soldadura a través de un difusor dispuesto en una pared lateral secundaria. Además contribuye a un diseño compacto del cuerpo de cámara, optimizando el espacio disponible, sin necesidad de introducir tuberías en el interior de la cámara. Se garantiza el aporte de gas inerte al espacio de soldadura para dirigirlo a la zona lateral y superior de la soldadura a efectuar. Por otro lado se puede definir por lo menos un canal central entre la base principal y la base secundaria, estando el canal central en comunicación fluida con el receptáculo a través de un difusor alargado en la dirección longitudinal y dispuesto en la base secundaria. Este canal central garantiza el caudal de gas inerte a distribuir específicamente por la parte inferior de la soldadura en el espacio de soldadura, sin necesidad de introducir tuberías. The lid may be made of a heat conducting material. This solution contributes significantly to the evacuation of heat from the assembly throughout the chamber body and therefore increases the durability of the assembly. The opening can advantageously have a circular configuration with at least one elongated extension, as a keyhole. This suitable form of the opening where the gun and the rod is located, prevents the leakage of inert gas, achieving greater sealing of the chamber and avoiding in greater measure the leakage of inert gas. Advantageously, at least one side channel can be defined between the cover, the main base, a main side wall and a secondary side wall, the side channel being in fluid communication with the receptacle through an elongated diffuser in the direction longitudinal and arranged in a secondary side wall. The arrangement of this channel guarantees the supply of inert gas laterally on the weld through a diffuser arranged in a secondary side wall. It also contributes to a compact design of the camera body, optimizing the available space, without the need to introduce pipes inside the chamber. The supply of inert gas to the welding space is guaranteed to direct it to the lateral and upper part of the welding to be carried out. On the other hand, at least one central channel can be defined between the main base and the secondary base, the central channel being in fluid communication with the receptacle through an elongated diffuser in the longitudinal direction and arranged in the secondary base. This central channel guarantees the flow of inert gas to be distributed specifically through the lower part of the weld in the welding space, without the need to introduce pipes.
De acuerdo con otra característica ventajosa de la invención, el por lo menos un canal central 100 puede estar dispuesto entre un par de canales laterales 101 , 102. Esta configuración representa un aprovechamiento óptimo del espacio disponible, reduciendo las dimensiones del cuerpo de cámara. According to another advantageous feature of the invention, the at least one central channel 100 can be arranged between a pair of side channels 101, 102. This configuration represents an optimal use of the available space, reducing the dimensions of the camera body.
Según otra característica ventajosa de la invención, dos paredes laterales principales pueden presentar sendos chaflanes opuestos entre sí, tal que el cuerpo de cámara presenta una región, por lo menos parcialmente hueca, con forma de "V" vista en planta, en el que la entrada de gas está dispuesta en una zona estrecha de la "V" de manera que la trayectoria de paso del gas se ensancha en dirección a los difusores. Con estos chaflanes se evitan las pérdidas de carga del fluido inerte que sale directamente de la fuente de suministro de gas inerte donde se contiene hacia los canales laterales y/o centrales que inyectan el gas inerte en el interior del receptáculo. According to another advantageous feature of the invention, two main side walls can have two chamfers opposite each other, such that the chamber body has a region, at least partially hollow, with a "V" shaped plan view, in which the Gas inlet is arranged in a narrow area of the "V" so that the path of passage of the gas widens in the direction of the diffusers. With these chamfers, the loss of load of the inert fluid that leaves directly from the inert gas supply source where it is contained towards the lateral and / or central channels that inject the inert gas into the receptacle is avoided.
En la presente memoria la forma en "V" debe entenderse como sinónimo de forma acampanada en la que desde una zona estrecha se extienden los extremos de forma divergente entre sí. Here, the "V" shape should be understood as synonymous with a flared shape in which the ends extend divergently from each other from a narrow area.
El receptáculo puede comprender sendos difusores alargados provistos en dos paredes laterales secundarias enfrentadas entre sí, y un difusor en la base secundaria, estando dispuestos los difusores en la dirección longitudinal del cuerpo de cámara. Con esta configuración se garantiza el aporte adecuado y homogéneo del gas inerte alrededor de la soldadura a realizar. Se optimiza el consumo de gas inerte puesto que se dirige de forma muy específica sobre la zona del espacio de soldadura donde se lleva a cabo la soldadura. The receptacle may comprise two elongated diffusers provided on two secondary side walls facing each other, and a diffuser on the secondary base, the diffusers being arranged in the longitudinal direction of the chamber body. With this configuration the adequate and homogeneous contribution of the inert gas around the welding to be performed is guaranteed. Inert gas consumption is optimized since it is directed very specifically on the area of the welding space where welding is carried out.
De forma preferida, la base secundaria puede comprender al menos dos pletinas separadas entre sí con sendos rebordes enfrentados entre sí y orientados al espacio de soldadura tal que se configura un difusor alargado entre ambas pletinas. Estos rebordes además permiten que las piezas a soldar puedan guiarse a lo largo y fijarse en el receptáculo. La base principal y la base secundaria pueden ser extraíbles para facilitar la colocación y manipulación de las piezas a soldar. Para conseguir un aumento de la resistencia frente a temperaturas relativamente elevadas, la porción transparente puede estar fabricada en vidrio térmico. Preferably, the secondary base can comprise at least two plates separated from each other with flanges facing each other and oriented to the welding space such that an elongated diffuser is configured between both plates. These flanges also allow the pieces to be welded to be guided along and fixed in the receptacle. The main base and the secondary base can be removable to facilitate the placement and handling of the pieces to be welded. To achieve an increase in resistance to relatively high temperatures, the transparent portion may be made of thermal glass.
Otras características y ventajas de la cámara para soldadura con atmósfera inerte objeto de la presente invención resultarán evidentes a partir de la descripción de una realización preferida, pero no exclusiva, que se ilustra a modo de ejemplo no limitativo en los dibujos que se acompañan, en los cuales: Other features and advantages of the inert atmosphere welding chamber object of the present invention will be apparent from the description of a preferred but not exclusive embodiment, which is illustrated by way of non-limiting example in the accompanying drawings, in which:
BREVE DESCRIPCIÓN DE LOS DIBUJOS Figura 1 .- Es una vista esquemática en perspectiva de una cámara para soldadura con atmósfera inerte de acuerdo con el objeto de la invención; BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 .- It is a schematic perspective view of a welding chamber with an inert atmosphere according to the object of the invention;
Figura 2.- Es una vista esquemática en despiece de la cámara de la figura 1 ; Figure 2.- It is an exploded schematic view of the chamber of Figure 1;
Figura 3.- Es una vista esquemática y en perspectiva de una parte de la cámara durante su montaje; y Figure 3.- It is a schematic and perspective view of a part of the chamber during its assembly; Y
Figura 4.- Es una vista esquemática y en perspectiva de la cámara de la figura 3 con la trayectoria de un fluido inerte representada; Figure 4.- It is a schematic and perspective view of the chamber of Figure 3 with the trajectory of an inert fluid represented;
DESCRIPCIÓN DE UNA REALIZACIÓN PREFERENTE Tal como se muestra en las figuras 1-4 adjuntas se ha representado una realización preferida de una cámara para soldadura con atmósfera inerte según la invención. DESCRIPTION OF A PREFERRED EMBODIMENT As shown in the attached figures 1-4, a preferred embodiment of a welding chamber with an inert atmosphere according to the invention has been shown.
La cámara para soldadura con atmósfera inerte comprende un cuerpo de cámara 1 oblongo que comprende a su vez una base principal 2 y una cubierta 3 vinculadas entre sí por una pluralidad de paredes laterales principales 22, 23, 24 25. De esta forma se define un espacio cerrado por el que puede fluir el gas inerte que se empleará para conseguir la atmósfera protectora. Este gas puede ser argón, helio o cualquier otro dependiendo de las necesidades particulares de cada caso. Continuando con la descripción de la cámara, puede verse que también comprende un receptáculo 4 dispuesto a modo de cavidad en la cubierta 3 que comprende una base secundaria 41 vinculada a la cubierta 3 mediante unas paredes laterales secundarias 42, 43, 44, 45. Particularmente la pared lateral secundaria 45 coincide con la pared lateral principal 24 (ver figura 2), pero lógicamente podrían ser elementos distintos. En el receptáculo 4 está previsto que se lleve a cabo la soldadura sobre las piezas a unir o reparar. The welding chamber with an inert atmosphere comprises an oblong chamber body 1 which in turn comprises a main base 2 and a cover 3 linked to each other by a plurality of main side walls 22, 23, 24 25. In this way a enclosed space through which the inert gas that will be used to achieve the protective atmosphere can flow. This gas can be argon, helium or any other depending on the particular needs of each case. Continuing with the description of the chamber, it can be seen that it also comprises a receptacle 4 disposed as a cavity in the cover 3 comprising a secondary base 41 linked to the cover 3 by means of secondary side walls 42, 43, 44, 45. Particularly the secondary side wall 45 coincides with the main side wall 24 (see figure 2), but logically they could be different elements. In the receptacle 4 it is provided that welding be carried out on the parts to be joined or repaired.
En cuanto al material para fabricar el cuerpo de cámara 1 que comprende el receptáculo 4, podrá ser preferentemente metálico, o cualquier otro capaz de resistir las temperaturas de soldadura o las reacciones químicas desarrolladas durante la soldadura. As for the material for manufacturing the chamber body 1 comprising the receptacle 4, it may preferably be metallic, or any other capable of withstanding welding temperatures or chemical reactions developed during welding.
Este receptáculo 4 dispuesto como una cavidad, lógicamente ha de obturarse para evitar o reducir en gran medida el consumo de gas inerte durante la soldadura. Para ello está previsto el uso de una tapa 30 vinculable a dicho receptáculo 4 de forma que se define un espacio de soldadura, en el que la tapa 30 comprende preferentemente una porción transparente 31 con una abertura 32 susceptible y dimensionada para la introducción de un dispositivo de soldadura (no representado). La abertura 32 presenta de forma preferida una configuración circular con una extensión alargada, a modo de ojo de cerradura. Es evidente que la forma podrá variar para adaptarse a la configuración del dispositivo de soldadura empleado. Esta forma adoptada responde a la necesidad de sitúa una pistola y una varilla para soldar. This receptacle 4, arranged as a cavity, logically has to be sealed to avoid or greatly reduce the consumption of inert gas during welding. For this, the use of a lid 30 linked to said receptacle 4 is provided so that a welding space is defined, in which the lid 30 preferably comprises a transparent portion 31 with a susceptible opening 32 and sized for the introduction of a device welding (not shown). The opening 32 preferably has a circular configuration with an elongated extension, as a keyhole. It is evident that the shape may vary to adapt to the configuration of the welding device used. This adopted form responds to the need to place a gun and a welding rod.
A pesar de que en la presente realización preferida solo se haya empleado una única porción transparente 31 y una sola abertura 32, es evidente que el número de porciones transparentes 31 y el número de aberturas 32 podrá variar en función de cada caso. En cualquier caso por lo menos la porción transparente 31 con su abertura 32 es deslizable respecto al receptáculo 4, aunque puede ser toda la tapa 30 en su conjunto la que sea deslizable respecto al receptáculo 4. En la presente realización la tapa 30 comprende una corredera 37 alargada, con un par de guías 33 dispuestas a ambos lados de la corredera 37 y en la que la porción transparente 31 es susceptible de posicionarse entre ambas guías 33, de forma que la abertura 32 deslice a lo largo de la corredera 37. De esa manera el usuario puede desplazar cómodamente el dispositivo de soldadura por ejemplo siguiendo la dirección longitudinal D del cuerpo de cámara 1 y se minimiza la salida de gas inerte al exterior. La tapa 30 está preferentemente fabricada en un material conductor del calor, por ejemplo un metal y la porción transparente 31 está preferentemente fabricada en metacrilato o en vidrio térmico, dependiendo de las necesidades de evacuación y resistencia de calor. Although in the present preferred embodiment only a single transparent portion 31 and a single opening 32 have been used, it is clear that the number of transparent portions 31 and the number of openings 32 may vary depending on each case. In any case at least the transparent portion 31 with its opening 32 is slidable with respect to the receptacle 4, although it may be the entire lid 30 as a whole that is slidable with respect to the receptacle 4. In the present embodiment the lid 30 comprises a slide 37 elongated, with a pair of guides 33 arranged on both sides of the slide 37 and in which the transparent portion 31 is capable of being positioned between both guides 33, so that the opening 32 slides along the slide 37. that way the user can comfortably move the welding device for example following the longitudinal direction D of the chamber body 1 and the outflow of inert gas to the outside is minimized. The cover 30 is preferably made of a heat conductive material, for example a metal and the transparent portion 31 is preferably made of methacrylate or thermal glass, depending on the needs of evacuation and heat resistance.
La presente tapa 30 está dimensionada de forma que presente unos extremos 38 de sección transversal en "L", a ambos lados respecto de la dirección longitudinal, para que encajen con las esquinas formadas por la cubierta 3 y las paredes laterales principales 22 y 23. Así será posible deslizar la tapa 30 respecto al resto del cuerpo de cámara 1 , especialmente respecto al receptáculo 4. La mayor parte de la tapa 30 puede estar hecha de metal con la porción transparente 31 situada entre ambos extremos de sección en "L". The present cover 30 is sized so that it has ends 38 of "L" cross-section, on both sides with respect to the longitudinal direction, so that they fit with the corners formed by the cover 3 and the main side walls 22 and 23. Thus, it will be possible to slide the cover 30 with respect to the rest of the chamber body 1, especially with respect to the receptacle 4. The majority of the cover 30 can be made of metal with the transparent portion 31 located between both ends of the section in "L".
La presente cámara también comprende unos medios de alimentación que comprenden una entrada 200 en comunicación fluida con unos difusores 501 , 502, 503 alargados. La entrada 200 está dispuesta en el cuerpo de cámara 1 , por ejemplo en una pared lateral principal 25 y se puede vincular a una fuente de gas externa (no representada). La fuente de gas puede ser por ejemplo una botella de gas. The present chamber also comprises feeding means comprising an input 200 in fluid communication with elongated diffusers 501, 502, 503. The inlet 200 is arranged in the chamber body 1, for example in a main side wall 25 and can be linked to an external gas source (not shown). The gas source can be for example a gas bottle.
En la presente realización, los difusores 501 , 502, 503 alargados o lineales están dispuestos en el receptáculo 4 y longitudinalmente en relación a la longitud del cuerpo de cámara 1 . Al considerarse lineales, la longitud de los mismos es mayor que su anchura. Por otro lado se prefiere que los difusores 501 , 502, 503 abarquen toda la longitud del receptáculo 4 para mejorar la difusión de gas inerte sobre la zona donde se efectúa la soldadura, aunque en otras variantes los difusores 501 , 502, 503 pueden presentar una longitud ligeramente inferior. In the present embodiment, elongated or linear diffusers 501, 502, 503 are arranged in the receptacle 4 and longitudinally in relation to the length of the chamber body 1. When considered linear, their length is greater than their width. On the other hand it is preferred that the diffusers 501, 502, 503 cover the entire length of the receptacle 4 to improve the diffusion of inert gas over the area where the welding is performed, although in other variants the diffusers 501, 502, 503 may have a slightly shorter length.
Será evidente para el experto en la materia que el número de entradas 200 así como difusores 501 , 502, 503 se podrá modificar. De preferencia el receptáculo 4 comprende sendos difusores 502, 503 alargados provistos en dos paredes laterales secundarias 42, 43 enfrentadas entre sí, y un difusor 501 en la base secundaria 41 . It will be apparent to the person skilled in the art that the number of inputs 200 as well as diffusers 501, 502, 503 may be modified. Preferably, the receptacle 4 comprises two elongated diffusers 502, 503 provided on two secondary side walls 42, 43 facing each other, and a diffuser 501 on the secondary base 41.
Continuando con las figuras adjuntas, se puede ver que se define un par de canales laterales 101 , 102 entre la cubierta 3, la base principal 2, respectivamente una pared lateral principal 22, 23 y respectivamente una pared lateral secundaria 42, 43. Estos canales laterales 101 , 102 están en comunicación fluida con el receptáculo 4 a través de los difusores 502, 503 alargados dispuestos respectivamente en un par de paredes laterales secundarias 42, 43 enfrentadas entre sí y que definen parcialmente cada uno de los canales laterales 101 , 102. Adicionalmente a los canales laterales 101 , 102, también está previsto por lo menos un canal central 100 entre la base principal 2 y la base secundaria 41 , estando el canal central 100 en comunicación fluida con el receptáculo 4 a través de un difusor 501 alargado dispuesto en la base secundaria 41 . Las paredes laterales secundarias 42, 43 pueden hacer de separadores entre los canales laterales 101 , 102 y el canal central 100, de forma que éste último discurra entre los canales laterales 101 , 102. Con esta configuración se consigue un diseño que aprovecha el espacio de forma óptima, evitando la adopción de soluciones voluminosas como en el estado de la técnica. Continuing with the attached figures, it can be seen that a pair of side channels 101, 102 are defined between the cover 3, the main base 2, respectively a main side wall 22, 23 and respectively a secondary side wall 42, 43. These channels sides 101, 102 are in fluid communication with the receptacle 4 through the elongated diffusers 502, 503 respectively arranged on a pair of secondary side walls 42, 43 facing each other and partially defining each of the side channels 101, 102. In addition to the side channels 101, 102, at least one central channel 100 between the main base 2 and the secondary base 41, the central channel 100 being in fluid communication with the receptacle 4 through an elongated diffuser 501 arranged in the secondary base 41. The secondary side walls 42, 43 can act as spacers between the side channels 101, 102 and the central channel 100, so that the latter runs between the side channels 101, 102. With this configuration a design is achieved that takes advantage of the space of Optimal form, avoiding the adoption of bulky solutions as in the state of the art.
Puede verse que el cuerpo de cámara 1 de la cámara comprende un par de paredes laterales principales 22, 23 que presentan sendos chaflanes 26, 27 opuestos entre sí, de forma tal que el cuerpo de cámara 1 presenta una región 600 por lo menos parcialmente hueca, con forma de "V" vista en planta, en el que la entrada 200 de gas está dispuesta en una zona estrecha de la "V" de manera que la trayectoria de paso T del gas inerte se ensancha en dirección a los difusores 501 , 502, 503. It can be seen that the chamber body 1 of the chamber comprises a pair of main side walls 22, 23 having two chamfers 26, 27 opposite each other, such that the chamber body 1 has a region 600 at least partially hollow , in the form of a "V" plan view, in which the gas inlet 200 is arranged in a narrow area of the "V" so that the passage path T of the inert gas widens in the direction of the diffusers 501, 502, 503.
En la realización preferida, la base secundaria 41 comprende un par de pletinas 41 A, 41 B separadas entre sí, con sendos rebordes 46C, 46D enfrentados entre sí y orientados al espacio de soldadura, de manera que se configura el difusor 501 alargado entre ambas pletinas 41 A, 41 B. Se puede ver además que los difusores 502, 503 de las paredes laterales secundarias 42, 43 también están conformados a partir de la combinación de sendas parejas de rebordes 36A y 46A, 36B y 46B, que están orientados hacia el espacio de soldadura conformado por el receptáculo 4 susceptible de vincularse a la tapa 30. Los rebordes 36A y 36B están vinculados a unas respectivas porciones 34 y 35 de la cubierta 3 y los rebordes 46A y 46B están vinculados a las respectivas paredes laterales secundarias 42 y 43. In the preferred embodiment, the secondary base 41 comprises a pair of plates 41 A, 41 B separated from each other, with individual flanges 46C, 46D facing each other and oriented to the welding space, so that the elongated diffuser 501 is configured between the two plates 41 A, 41 B. It can also be seen that the diffusers 502, 503 of the secondary side walls 42, 43 are also formed from the combination of two pairs of flanges 36A and 46A, 36B and 46B, which are oriented towards the welding space formed by the receptacle 4 capable of being linked to the cover 30. The flanges 36A and 36B are linked to respective portions 34 and 35 of the cover 3 and the flanges 46A and 46B are linked to the respective secondary side walls 42 and 43.
De esta forma todos los difusores 501 , 502, 503 presentan una configuración muy similar como lo haría la boquilla cerámica de la pistola de soldadura TIG. Se dirige el gas inerte aplicado directamente sobre la soldadura. Esto proporciona al operador de soldadura mayor naturalidad y disponibilidad para realizar el proceso de soldadura. En una realización no ilustrada, las paredes laterales secundarias 42, 43, 44, 45 pueden comprender unas hendiduras 401 , 402 alargadas susceptibles de recibir la tapa 30 de forma machihembrada. Estas hendiduras 401 , 402 pueden configurarse a partir de los rebordes 36A, 36B sobre los que se pueden apoyar de forma deslizante una tapa 30. In this way all diffusers 501, 502, 503 have a very similar configuration as would the ceramic nozzle of the TIG welding gun. Inert gas applied directly to the weld is directed. This provides the welding operator with greater naturalness and availability to perform the welding process. In an embodiment not illustrated, the secondary side walls 42, 43, 44, 45 may comprise elongated grooves 401, 402 capable of receiving the tongue-and-groove lid 30. These slits 401, 402 can be configured from the flanges 36A, 36B on which a cover 30 can slide slidably.
Para mejorar el posicionamiento de piezas a soldar (no representadas), por ejemplo de titanio o de una aleación de titanio, en una realización alternativa no mostrada, la base principal 2 y la base secundaria 41 pueden ser extraíbles por ejemplo por deslizamiento, articulación, etc. To improve the positioning of parts to be welded (not shown), for example of titanium or of a titanium alloy, in an alternative embodiment not shown, the main base 2 and the secondary base 41 can be removable, for example by sliding, articulation, etc.
En cuanto a la fabricación de los distintos componentes de la invención, una forma preferida y sencilla consiste en unir las diversas piezas sueltas, por ejemplo mediante soldadura. En una condición de uso, el operario puede colocar las piezas a soldar en el receptáculo 4. Gracias a la configuración saliente de los rebordes 46C, 46D, se ayuda a colocar correctamente las piezas a soldar. A continuación se procede a cerrar la tapa 30 y a iniciar el suministro de gas inerte que se introduce por la entrada 200 y se distribuye sin turbulencias por la porción 600 hueca, y se dirige y reparte por los canales laterales 101 , 102 y por el canal central 100. A continuación el gas inerte fluye a través de los difusores 501 , 502, 503 y se dirige el gas inerte hacia el espacio de soldadura definido por el receptáculo 4 y la tapa 30. As for the manufacture of the various components of the invention, a preferred and simple way is to join the various loose pieces, for example by welding. In a condition of use, the operator can place the parts to be welded in the receptacle 4. Thanks to the protruding configuration of the flanges 46C, 46D, it is helped to correctly place the parts to be welded. Next, the lid 30 is closed and the inert gas supply is introduced, which is introduced through the inlet 200 and distributed without turbulence through the hollow portion 600, and is directed and distributed through the side channels 101, 102 and through the channel central 100. The inert gas then flows through the diffusers 501, 502, 503 and the inert gas is directed towards the welding space defined by the receptacle 4 and the cover 30.
El usuario puede introducir una pistola y una varilla (no representadas) a través de la abertura 32 y deslizarías para realizar la soldadura, por ejemplo en forma de cordón. Gracias a la corredera 37 y a la porción transparente 31 deslizable con la abertura 32 es posible hacerlo. The user can insert a gun and a rod (not shown) through the opening 32 and would slide to perform the welding, for example in the form of a bead. Thanks to the slide 37 and the transparent portion 31 slidable with the opening 32 it is possible to do so.
Los canales laterales 101 , 102 y el canal central 100 reparten el gas inerte por la parte inferior de la soldadura y por los laterales, proporcionando una protección total de la soldadura frente al oxígeno. The lateral channels 101, 102 and the central channel 100 distribute the inert gas through the bottom of the weld and through the sides, providing total protection of the weld against oxygen.
Para la fabricación del presente cuerpo de cámara 1 , podrá hacerse por ejemplo mediante la soldadura o unión de distintos componentes como los representados en la figura 2. Los detalles, las formas, las dimensiones y demás elementos accesorios, así como los materiales empleados en la fabricación de la cámara de soldadura con atmósfera inerte de la invención podrán ser convenientemente sustituidos por otros que no se aparten del ámbito definido por las reivindicaciones que se incluyen a continuación. For the manufacture of the present chamber body 1, it can be done, for example, by welding or joining different components such as those shown in Figure 2. The details, shapes, dimensions and other accessory elements, as well as the materials used in the manufacture of the welding chamber with inert atmosphere of the invention may be conveniently substituted by others that do not depart from the scope defined by the claims that are include below.

Claims

REIVINDICACIONES
1 . Cámara para soldadura con atmósfera inerte que comprende: one . Welding chamber with inert atmosphere comprising:
un cuerpo de cámara (1 ) oblongo que comprende a su vez una base principal (2) y una cubierta (3) vinculadas entre sí por una pluralidad de paredes laterales principales (22, 23, 24, 25), an oblong chamber body (1) which in turn comprises a main base (2) and a cover (3) linked to each other by a plurality of main side walls (22, 23, 24, 25),
caracterizada por el hecho de que comprende adicionalmente: characterized by the fact that it further comprises:
un receptáculo (4) dispuesto a modo de cavidad en la cubierta (3) que comprende una base secundaria (41 ) vinculada a la cubierta (3) mediante unas paredes laterales secundarias (42, 43, 44, 45), a receptacle (4) disposed as a cavity in the cover (3) comprising a secondary base (41) linked to the cover (3) by means of secondary side walls (42, 43, 44, 45),
unos medios de alimentación que comprenden por lo menos una entrada (200) en comunicación fluida con por lo menos un difusor (501 , 502, 503) alargado, en el que la entrada (200) está dispuesta en el cuerpo de cámara (1 ) y es vinculable a una fuente de gas, y el difusor (501 , 502, 503) estando dispuesto en el receptáculo, Feeding means comprising at least one inlet (200) in fluid communication with at least one elongated diffuser (501, 502, 503), in which the inlet (200) is arranged in the chamber body (1) and is linkable to a gas source, and the diffuser (501, 502, 503) being disposed in the receptacle,
una tapa (30) vinculable al receptáculo (4) de forma que se define un espacio de soldadura, en el que la tapa (30) comprende por lo menos una porción transparente (31 ) con una abertura (32) susceptible y dimensionada para la introducción de un dispositivo de soldadura, en el que por lo menos la porción transparente (31 ) es deslizable respecto al receptáculo (4). a cover (30) linkable to the receptacle (4) so that a welding space is defined, in which the cover (30) comprises at least one transparent portion (31) with an opening (32) susceptible and sized for the introduction of a welding device, in which at least the transparent portion (31) is slidable with respect to the receptacle (4).
2. Cámara para soldadura con atmósfera inerte según la reivindicación anterior, caracterizada por el hecho de que las paredes laterales secundarias (42, 43, 44, 45) comprenden unas hendiduras (401 , 402) alargadas susceptibles de recibir la tapa (30) de forma machihembrada 2. Welding chamber with an inert atmosphere according to the preceding claim, characterized in that the secondary side walls (42, 43, 44, 45) comprise elongated grooves (401, 402) capable of receiving the cover (30) of tongue and groove shape
3. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que la tapa (30) comprende una corredera (37) alargada, con un par de guías (33) dispuestas a ambos lados de la corredera (37) y en la que la porción transparente (31 ) es susceptible de posicionarse entre ambas guías (33), de forma que la abertura (32) deslice a lo largo de la corredera (37). 3. Welding chamber with inert atmosphere according to any of the preceding claims, characterized in that the cover (30) comprises an elongated slide (37), with a pair of guides (33) arranged on both sides of the slide ( 37) and in which the transparent portion (31) is capable of being positioned between both guides (33), so that the opening (32) slides along the slide (37).
4. Cámara para soldadura con atmósfera inerte según la reivindicación anterior, caracterizada por el hecho de que la tapa (30) está fabricada en un material conductor del calor. 4. Welding chamber with inert atmosphere according to the preceding claim, characterized in that the cover (30) is made of a heat conducting material.
5. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que la abertura (32) presenta una configuración circular con por lo menos una extensión alargada, a modo de ojo de cerradura. 5. Welding chamber with an inert atmosphere according to any of the preceding claims, characterized in that the opening (32) has a circular configuration with at least one elongated extension, as a keyhole.
6. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que se define por lo menos un canal lateral (101 , 102) entre la cubierta (3), la base principal (2), una pared lateral principal (22, 23) y una pared lateral secundaria (42, 43), estando el canal lateral (101 , 102) en comunicación fluida con el receptáculo (4) a través de un difusor (502, 503) alargado en la dirección longitudinal y dispuesto en una pared lateral secundaria (42, 43). 6. Welding chamber with an inert atmosphere according to any of the preceding claims, characterized in that at least one lateral channel (101, 102) is defined between the cover (3), the main base (2), a wall main side (22, 23) and a secondary side wall (42, 43), the side channel (101, 102) being in fluid communication with the receptacle (4) through a diffuser (502, 503) elongated in the direction longitudinal and arranged in a secondary side wall (42, 43).
7. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que se define por lo menos un canal central (100) entre la base principal (2) y la base secundaria (41 ), estando el canal central (100) en comunicación fluida con el receptáculo (4) a través de un difusor (501 ) alargado en la dirección longitudinal y dispuesto en la base secundaria (41 ). 7. Welding chamber with an inert atmosphere according to any of the preceding claims, characterized in that at least one central channel (100) is defined between the main base (2) and the secondary base (41), the channel being central (100) in fluid communication with the receptacle (4) through a diffuser (501) elongated in the longitudinal direction and arranged in the secondary base (41).
8. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones 6- 7, caracterizada por el hecho de que el por lo menos un canal central (100) está dispuesto entre un par de canales laterales (101 , 102). 8. Welding chamber with an inert atmosphere according to any of claims 6-7, characterized in that the at least one central channel (100) is arranged between a pair of lateral channels (101, 102).
9. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que dos paredes laterales principales (22, 23) presentan sendos chaflanes (26, 27) opuestos entre sí, tal que el cuerpo de cámara (1 ) presenta una región (600), por lo menos parcialmente hueca, con forma de "V" vista en planta, en el que la entrada (200) de gas está dispuesta en una zona estrecha de la "V" de manera que la trayectoria de paso (T) del gas inerte se ensancha en dirección a los difusores (501 , 502, 503). 9. Welding chamber with inert atmosphere according to any of the preceding claims, characterized in that two main side walls (22, 23) have two chamfers (26, 27) opposite each other, such that the chamber body (1 ) has a region (600), at least partially hollow, with a "V" shaped plan view, in which the gas inlet (200) is arranged in a narrow area of the "V" so that the path inlet (T) of the inert gas widens in the direction of the diffusers (501, 502, 503).
10. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que el receptáculo (4) comprende sendos difusores (502, 503) alargados provistos en dos paredes laterales secundarias (42, 43) enfrentadas entre sí, y un difusor (501 ) en la base secundaria (41 ), estando dispuestos los difusores (501 , 502, 503) en la dirección longitudinal del cuerpo de cámara (1 ). 10. Welding chamber with inert atmosphere according to any of the preceding claims, characterized in that the receptacle (4) comprises two elongated diffusers (502, 503) provided on two secondary side walls (42, 43) facing each other, and a diffuser (501) in the secondary base (41), the diffusers (501, 502, 503) being arranged in the longitudinal direction of the chamber body (1).
1 1. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que la base secundaria (41 ) comprende al menos dos pletinas (41 A, 41 B) separadas entre sí con sendos rebordes (46C, 46D) enfrentados entre sí y orientados al espacio de soldadura tal que se configura un difusor (501 ) alargado entre ambas pletinas (41 A, 41 B). 1 1. Welding chamber with an inert atmosphere according to any of the preceding claims, characterized in that the secondary base (41) comprises at least two plates (41 A, 41 B) separated from each other with separate flanges (46C, 46D ) facing each other and oriented to the welding space such that an elongated diffuser (501) is configured between both plates (41 A, 41 B).
12. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que la base principal (2) y la base secundaria (41 ) son extraíbles. 12. Welding chamber with inert atmosphere according to any of the preceding claims, characterized in that the main base (2) and the secondary base (41) are removable.
13. Cámara para soldadura con atmósfera inerte según cualquiera de las reivindicaciones anteriores, caracterizada por el hecho de que la porción transparente (31 ) está fabricada en vidrio térmico. 13. Welding chamber with an inert atmosphere according to any of the preceding claims, characterized in that the transparent portion (31) is made of thermal glass.
PCT/ES2017/070086 2016-03-04 2017-02-14 Welding chamber with inert atmosphere WO2017149176A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090230094A1 (en) * 2008-03-14 2009-09-17 Corne Joseph E Open-top welding chamber
CN201862936U (en) * 2010-10-13 2011-06-15 沈阳飞机工业（集团）有限公司 Convenient inert gas protection box used for welding
CN203448845U (en) * 2013-09-12 2014-02-26 云南钛业股份有限公司 Device for repairing titanium and titanium alloy plate hole
CN203765148U (en) * 2014-01-15 2014-08-13 西安航空动力股份有限公司 Portable argon shield case

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090230094A1 (en) * 2008-03-14 2009-09-17 Corne Joseph E Open-top welding chamber
CN201862936U (en) * 2010-10-13 2011-06-15 沈阳飞机工业（集团）有限公司 Convenient inert gas protection box used for welding
CN203448845U (en) * 2013-09-12 2014-02-26 云南钛业股份有限公司 Device for repairing titanium and titanium alloy plate hole
CN203765148U (en) * 2014-01-15 2014-08-13 西安航空动力股份有限公司 Portable argon shield case

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