• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A chamber for welding with an inert atmosphere comprising: an oblong chamber body comprising a main base and a cover linked together 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 secondary side walls, a supply means for inert gas comprising an input in fluid communication with diffusers, in which the inlet is arranged in the chamber body, and the diffuser being arranged in the receptacle, a cover connectable to the receptacle so that a welding space is defined, wherein the lid comprises a transparent portion with an opening sized for the introduction of a welding device, the transparent portion being slidable relative to the receptacle. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2568103A1
    申请号:ES201630259
    申请日:2016-03-04
    公开日:2016-04-27
    发明作者:Manuel PASCUAL GUILLAMÓN；Francisco Javier CÁRCEL CARRASCO
    申请人:Universidad Politecnica de Valencia；
    IPC主号:
    专利说明:

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    DESCRIPTION
    Welding chamber with inert atmosphere OBJECT OF THE INVENTION
    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.
    BACKGROUND OF THE INVENTION
    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.
    To avoid contact with oxygen, useful tools are often used to create an inert atmosphere that protects the weld by means of inert gas, such as argon, which avoids any high temperature contamination of corrosive natural environments.
    The Chinese utility model document CN201862936 U describes a portable chamber with protective gas inside it for welding comprising a box, a perforated copper plate, gas inlets, openings to facilitate 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 supply of gas, 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
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    sliding so that the user cannot move the welder tool 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 supposes 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 rod or titanium alloy, 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 welder to move to make a weld seam, with an opening that slides relatively from the welding chamber. Neither is the lateral supply of inert gas on the area to be welded.
    The Chinese utility model document CN202271106 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, a opening on the torch box, entrance hole in the tube box, an exit 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
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    with adjustment means, inert gas supply pipe inside the box and a window to observe the welding process. The expert will 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 it applies and the inert gas is 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 the 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 welding tool, significant losses of inert gas are produced, which must 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.
    US Patent US2008029496 A1 describes a two-piece welding process that is part of the head of a golf club. These pieces 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.
    The Spanish utility model document ES1052917 U describes a portable protective gas chamber for welding metal pipes, especially titanium, which is made up of two crowns and a ring. On the outer face of the crowns there is a fitting that serves to connect to the gas source and through which the inert or protective gas is introduced. The ring has an opening where welding of
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    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 cord. The solution is not intended for the union of other pieces, for example flat ones, nor does it allow the feeding of inert gas around the entire welding section and also requires the use of an intermediate plate to ensure that the inert gas is distributed.
    There is therefore a need for a simple, comfortable and efficient device that solves the aforementioned problems when welding in inert atmospheres.
    DESCRIPTION OF THE INVENTION
    The present invention has been developed in order to provide a welding chamber with an inert atmosphere that solves the aforementioned drawbacks, also providing other additional advantages that will be apparent from the description attached below.
    In the present specification the use of the terms, longitudinal, upper, lower, lateral, frontal will be understood in a resting condition.
    It is therefore an object of the present application a welding chamber with an inert atmosphere comprising:
    an oblong chamber body which in turn comprises a main base and a cover linked together 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 side walls secondary, a feeding means comprising at least one entrance in fluid communication with at least one elongated diffuser, in which the entrance is arranged in the chamber body and is linkable to a gas source, and the diffuser being arranged in the receptacle,
    a lid linked to the receptacle so that a welding space is defined, in which the lid comprises at least one transparent portion with a susceptible opening
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    and sized for the introduction of a welding device, in which at least the transparent portion is slidable with respect to the receptacle.
    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 with which the welded material remains 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, which 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 teaching centers and universities, as well as companies that carry out welding of this type.
    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 cover 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 weld seam on parts of any geometry.
    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 welding. 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 on the solder is directed, in a very similar way as the ceramic nozzle would
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    of the TIG welding gun. The latter provides the welding operator with greater naturalness and availability to perform the welding process.
    According to 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.
    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 is limited, relatively less resistant than that of the rest of the camera body.
    The lid may be made of a heat conducting material. This solution contributes significantly to the evacuation of heat from the assembly throughout the camera 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 camera. 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.
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    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.
    According to another advantageous feature of the invention, the at least one central channel 100 can be arranged between a pair of lateral channels 101, 102. This configuration represents an optimal use of the available space, reducing the dimensions of the camera body.
    According to another advantageous feature of the invention, two main side walls may 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 gas passage 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 inside the receptacle is avoided.
    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.
    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 over the area of the welding space where welding is carried out.
    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.
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    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.
    Other features and advantages of the welding chamber with an inert atmosphere 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:
    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;
    Figure 2.- It is an exploded schematic view of the camera of Figure 1;
    Figure 3.- It is a schematic and perspective view of a part of the camera during its assembly; Y
    Figure 4.- It is a schematic and perspective view of the chamber of Figure 3 with the trajectory of an inert fluid represented;
    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.
    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.
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    Continuing with the description of the camera, 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 receptacle 4 it is planned that welding be carried out on the parts to be joined or repaired.
    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 the 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. To this end, 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.
    Although in the present preferred embodiment only a single transparent portion 31 and a single opening 32 have been used, it is evident 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 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 slide along the slide 37. In this way the user can comfortably move the welding device for example following the longitudinal direction D of the chamber body 1 and the inert gas outlet to the outside is minimized.
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    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 cross section in "L", 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 greater part of the cover 30 can be made of metal with the transparent portion 31 located between the two "L" section ends.
    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.
    In the present embodiment, the 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, the length thereof is greater than its 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.
    It will be apparent to the person skilled in the art that the number of entries 200 as well as diffusers 501, 502, 503 may be modified. Preferably, 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.
    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 receptacle 4 through the
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    elongated diffusers 502, 503 respectively arranged in 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 is also provided 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 separators between the lateral channels 101, 102 and the central channel 100, so that the latter runs between the lateral channels 101, 102. With this configuration a design that takes advantage of the space in an optimal way, avoiding the adoption of bulky solutions as in the state of the art.
    It can be seen that the chamber body 1 of the chamber comprises a pair of main side walls 22, 23 that have chamfers 26, 27 opposite each other, such that 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
    In the preferred embodiment, the secondary base 41 comprises a pair of plates 41A, 41B separated from each other, with two flanges 46C, 46D facing each other and oriented to the welding space, so that the elongated diffuser 501 between both plates 41A is configured. , 41B. 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 connected 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.
    In this way all diffusers 501, 502, 503 have a very similar configuration as the ceramic nozzle of the TIG welding gun does. Inert gas applied directly to the weld is directed. This provides the welding operator with greater naturalness and availability to perform the welding process.
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    In an embodiment not illustrated, the secondary side walls 42, 43, 44, 45 may comprise elongate 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.
    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.
    As for the manufacture of the different 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 receptacle 4. Thanks to the outgoing 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 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 receptacle 4 and the cover 30.
    The user can insert a gun and a rod (not shown) through the opening 32 and slide them to perform welding, for example in the form of a cord. 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.
    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 an inert atmosphere of the invention may be conveniently replaced by others that do not depart from the scope defined by the claims that are include below.
    5
    权利要求:
    Claims (13)
    [1]
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    1. Welding chamber with an inert atmosphere comprising:
    an oblong chamber body (1) which in turn comprises a main base (2) and a cover (3) linked together by a plurality of main side walls (22, 23, 24, 25),
    characterized by the fact that it further 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),
    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 linked to a gas source, and the diffuser (501,502, 503) being arranged in the receptacle, a lid (30) linked to the receptacle (4) so that a welding space is defined, in which the lid ( 30) comprises at least one transparent portion (31) with a susceptible opening (32) 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]
    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]
    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]
    4. Welding chamber with an inert atmosphere according to the preceding claim, characterized in that the cover (30) is made of a heat conducting material.
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    [5]
    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]
    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]
    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]
    8. Welding chamber with an inert atmosphere according to any of claims 67, characterized in that the at least one central channel (100) is arranged between a pair of lateral channels (101, 102).
    [9]
    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 trajectory inlet (T) of the inert gas widens in the direction of the diffusers (501,502, 503).
    [10]
    10. Welding chamber with an 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).
    [11]
    11. 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 (41A, 41B) separated from each other with two flanges (46C, 46D) facing each other yes and oriented to the welding space such that an elongated diffuser (501) is configured
    5 between both plates (41A, 41B).
    [12]
    12. Welding chamber with an inert atmosphere according to any of the preceding claims, characterized in that the main base (2) and the secondary base (41) are removable.
    10
    [13]
    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.
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    同族专利:
    公开号 | 公开日
    WO2017149176A1|2017-09-08|
    ES2568103B2|2016-09-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20090230094A1|2008-03-14|2009-09-17|Corne Joseph E|Open-top welding chamber|
    CN201862936U|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|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|
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    PCT/ES2017/070086| WO2017149176A1|2016-03-04|2017-02-14|Welding chamber with inert atmosphere|
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