• 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:
    Equipment for performing circumferential TIG welding, comprising, in addition to a complete TIG welding device, a rotating union (2), through which all the system control and power signals are connected, as well as the gas and power connections. cooling water of the torch (7), whose stator (21) is mounted fixedly on the upper part of the structure (1), the set of mechanisms of this equipment hanging from its rotor, among which they constitute an essential part of it : an arc voltage control module (6) that controls the distance between the electrode (71) and the part being welded; some positioning modules (4) that allow the control of the torch's turning movement, which corresponds to the forward movement of the welding, and a movement perpendicular to the turning axis that allows choosing the radius to be welded and, during welding, performing the oscillation movement and a wire supply module (3) together with a module (5) for adjusting the position of the wire (8) in relation to the torch (7). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2799648A2
    申请号:ES201930408
    申请日:2019-05-08
    公开日:2020-12-18
    发明作者:Irias Gustavo Ranero；Campo Raúl Sanz；Estefania Fernando Gomez；Garcia Eduardo Sarachaga；Almeida Domingo Lima
    申请人:Equipos Nucleares SA；
    IPC主号:
    专利说明:

    [0002] Equipment for circumferential TIG welding
    [0004] Technical sector
    [0006] The sector of the invention is that of welding, especially TIG (Tungsten Inert Gas) welding, optionally with the addition of hot wire.
    [0008] Especially, this equipment has been designed to perform continuous welding, with the part in a static position while the welding head describes a circumferential path. This equipment can also be used in the internal recharging (plating) of tubes, which are within the range of the welding device.
    [0010] State of the art
    [0012] TIG welding is characterized by the creation of an electric arc between a refractory metal (tungsten alloy) electrode and the part, in an inert gas atmosphere. TIG welding uses, instead of a flux metal electrode like MIG welding, a non-consumable tungsten electrode, as this material can be heated to a very high temperature before melting, which is why TIG welding requires it to be apply additional filler or filler metal. This motivates that most of the existing references in the state of the art of equipment to perform circumferential welding, use MIG technology.
    [0014] In most rotary welding systems, the process cannot be carried out continuously since it is necessary to stop and rotate in the opposite direction to the welding direction to be able to recover the turns given due to the connection cables of both the mechanism itself and the own. of the welding process; which undoubtedly lengthens the working time substantially and increases the possibility of defects appearing in the successive stops and starts of the welding process.
    [0016] Explanation of the invention
    [0018] Based on the prior art, an objective of the present invention is to provide equipment for performing circumferential and continuous TIG welding, that is to say in which the welding head always rotate in the same direction. This equipment can also carry out internal overlay welding (plating) of steel tubes, providing a continuous helical weld, moving slightly longitudinally along the tube while performing a circumferential weld.
    [0020] In order to achieve the proposed objectives, mentioned in the previous section, the invention proposes a device, which has the characteristics of claim 1.
    [0022] The welding device allows the welding to be carried out unassisted and continuously, in contrast to most rotary welding systems in which the process cannot be carried out continuously since it is necessary to stop and rotate in the opposite direction to the of welding to be able to recover the turns given due to the connection cables of both the mechanism itself and those of the welding process. In this device it is not necessary to stop the process to recover the laps because it has a rotating union that allows continuous work.
    [0024] The welding device also incorporates all the necessary mechanisms for the control and management of the welding terminal.
    [0026] Description of the drawings
    [0028] To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, the present specification is accompanied by a set of drawings in which, by way of illustration and not limitation, the following has been represented:
    [0030] Figure 1 shows a general perspective view of the equipment of the invention and specifically of the position occupied by the rotating union (2), which is part of it.
    [0032] Figure 2 represents a diametrical section of said rotating joint (2).
    [0034] Figures 3, 4 and 5 show views from different angles, in which various mechanisms integrated in this equipment have been highlighted, specifically: The arc voltage control (AVC) (6), the power system (3) and adjustment of the position of the wire (5) and the radial positioning system (4) of the torch (7) with its corresponding electrode (71).
    [0035] Finally, figure 6 shows an equipment intended for the internal overlay welding (plating) of steel tubes (T).
    [0037] Implementation of the invention
    [0039] As can be seen in the referenced figures, the equipment for performing circumferential TIG welding, object of the present invention, comprises all the necessary mechanisms for the control and handling of the TIG welding terminal, such as: a torch (7) and an electrode (71), as well as a spool of additional filler metal filler wire, as well as a control module that integrates the electronics, the power unit and a user interface for the management and operation of the equipment, all mounted on a structure that has support means on or around the part to be welded. Within this welding equipment the following modules can be distinguished:
    [0041] A rotating union (2), through which all the command and control signals of the system are connected, in addition to the connections for the shielding gas, the cooling water of the torch (7) and the power connection of the own welding. In the upper part of the structure (1) the stator ((22) is fixed, in which the set of mechanisms of this equipment are fixed and from which the rotor (21) emerges from below; Thanks to this rotary joint (2 ) the welding process can be carried out in continuous mode, since the rotor (21) rotates indefinitely, moving the shielding gas and the flow and return of the cooling water from the torch (7) through a series of pipes (23) from the stator, through the connections necessary for the operation of the equipment; for this, these conduits have an entry into the stator (22) through the gas (27) and water (25, 26) connections. Through brushes (24) the electric current is transferred to the rotor (21).
    [0043] In TIG welding technique it is very important to keep the distance between the electrode and the part being welded controlled. The voltage between the electrode and the part is proportional to the distance between them. To control this, an arc voltage control (AVC) module (6) has been provided that controls the distance between the electrode (71) and the part being welded; This module includes an electronically controlled servomechanism that allows to monitor the arc voltage and control the electrode-part distance; in this way, keeping the arc voltage constant, it is achieved that the electrode-part distance is also constant. As can be seen in Fig. 3, the arc voltage control module (6) includes a servomotor (61) that when rotating moves a mechanism (62) that includes a spindle (63) that moves the torch (7) and the electrode (71) controlling the distance between it and the part being welded.
    [0045] The welding device also has servo-controlled positioning modules (4) (see Fig. 5), which allow control of the torch movement. One of these modules incorporates a rotary servomotor that performs the forward movement of the weld, making a 360 ° rotational movement when it comes to making circumferential welds, or continued when it is used in the internal cladding of tubes. A second module, located perpendicular to the equipment's rotation axis, allows choosing the radius to be welded and during welding allows the oscillation movement to be carried out, by moving the torch (7) laterally and therefore expanding or reducing the turning radius of this. This second module includes a servomotor (41) that, when rotating, moves a mechanism that incorporates a spindle (42), perpendicularly to the axis of rotation of the equipment, in order to be able to choose the radius to be welded and, during welding, perform the oscillation movement.
    [0047] This equipment also includes a module (3) for supplying yarn (8), which extracts it in a controlled way from a spool, by means of a servomotor included in said module, so that the yarn from the spool placed in a hole ( 9), located inside the equipment, comes out in a continuous and controlled way and is guided through a clamp (51) until its end is located in a delimited position, close to the torch (7). The module (5) allows the distance of said clamp to be varied in relation to the torch (7) and consequently the point where the end of the wire (8) is located with respect to it.
    [0049] Finally, this equipment has a guidance system to modify the inclination of the torch in the direction perpendicular to the movement, but, since this movement is carried out during the set-up prior to welding, it is not necessary to be motorized.
    [0051] In Fig. 6 an equipment designed to recharge (clad) inside a tube (T) is observed. This equipment has a structure formed by two flanges (13, 14), which are separated by several spindles (12) in which the equipment assembly is mounted, which moves along them by actuation of a servomotor that moves the nuts (11) located on the spindles. The lower flange (14) has coupling means at the mouth of the tube (T) so that the whole welding device is it moves along the spindles while the helical welding is carried out, while it rotates, with the torch (7) facing the inner wall thereof.
    [0053] Once the nature of the invention has been described, as well as an example of a preferred embodiment, it is evident that the invention is capable of industrial application, in the indicated sector.
    [0055] It is also stated for the appropriate purposes that the materials, shape, size and arrangement of the elements described may be modified, as long as this does not imply an alteration of the essential characteristics of the invention that are claimed below:
    权利要求:
    Claims (7)
    [1]
    1. - Equipment for performing circumferential TIG welding, which includes a TIG welding device, with its corresponding torch (7) and electrode (71) and a coil of wire (8) for additional filler metal, as well as a module control unit that integrates the electronics, the power unit and a user interface for the management and operation of the equipment, all mounted on a structure that has support means on, or around, the piece to be welded, characterized by further comprising:
    - a rotating union (2), through which all the command and control signals of the system are connected, in addition to the shielding gas connections, the torch cooling water (7) and the power connection of the the welding itself, in which the stator (22) is mounted fixed in the upper part of the structure (1), the set of mechanisms of this equipment hanging from its rotor;
    - an arc voltage control module (AVC) (6) that controls the distance between the electrode (71) and the part being welded, which includes an electronically controlled servomechanism that allows monitoring the arc voltage and controlling the distance electrode piece;
    - Servo-controlled positioning modules (4) that allow control of the torch's turning movement, corresponding to the forward movement of the welding, and a movement perpendicular to the turning axis that allows choosing the radius to weld and during welding the oscillation movement; and
    - a wire supply module (3) together with a module (5) for adjusting the position of the wire (8) in relation to the torch (7).
    [2]
    2. - Equipment according to claim 1, characterized in that the rotating joint (2) has a series of conduits (23) at the base of the rotor (21) through which the shielding gas leaves and the water enters and leaves. cooling of the torch (7), which connect with the gas (27) and water (25, 26) connections, present in the stator (22); likewise, it has brushes (24) through which the electric current is transferred to the rotor (21).
    [3]
    3. - Equipment according to any of the preceding claims, characterized in that the arc voltage control module (6) includes a servomotor (61) that when rotating moves a mechanism (62) that includes a spindle (63) that moves the torch (7) and the electrode (71) controlling the distance between it and the part being welded, to monitor the arc voltage during welding.
    [4]
    4. - Equipment according to any of the preceding claims, characterized in that one of the positioning modules includes a servomotor (41) that when rotating moves a mechanism that incorporates a spindle (42), perpendicular to the rotation axis of the equipment, to In order to vary the radius to be welded and during welding perform the oscillation movement.
    [5]
    5. - Equipment according to any of the preceding claims, characterized in that it also comprises a module (3) for supplying yarn (8), which extracts it in a controlled way from a coil, placed in a hole (9) located inside the equipment, guiding it through a clamp (51) located close to the torch (7), whose position is adjusted by means of a module (5) that varies the distance of said clamp in relation to the torch (7) and consequently the point in which is located the end of the thread (8) with respect to this.
    [6]
    6. - Equipment according to any of the preceding claims, characterized in that it also comprises a guiding mechanism that allows modifying the inclination of the torch in the direction perpendicular to the movement.
    [7]
    7. - Equipment according to any of the preceding claims, characterized in that its structure has two flanges (13, 14), separated by several spindles (12) on which the whole equipment is mounted, providing the lower flange (14) of coupling means in the mouth of a tube (T), so that the assembly of the welding device moves along the spindles while the helical welding is carried out, while rotating, with the torch ( 7) facing the inner wall of the same.
    类似技术:
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    同族专利:
    公开号 | 公开日
    ES2799648R1|2022-01-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1385588A|1972-05-08|1975-02-26|Clarke Chapman Ltd|Welding apparatus|
    GB1435500A|1972-07-20|1976-05-12|Rolls Royce|Machine for use in the welding of a pipe to a pipe-end fitting|
    JPH03180273A|1989-12-07|1991-08-06|Hitachi Seiko Ltd|Fixed pipe automatic welding equipment|
    CN102350567B|2011-09-26|2013-07-03|中国第一重型机械股份公司|TIG automatic overlay-welding device for all circumferential positions on inner surface of 90-degree bent pipe and welding method thereof|
    CN202278283U|2011-09-28|2012-06-20|中国第一重型机械股份公司|Circumferential all-position TIG automatic surfacing equipment for inner surface of 90-degree bent pipe|
    CN102825368B|2012-08-05|2016-01-20|中国第一重型机械股份公司|Flange sealing trough inner surface hoop all positon TIG automatic bead welding equipment and welding method thereof|
    CN202752730U|2012-08-05|2013-02-27|中国第一重型机械股份公司|Ring-direction all-position tungsten inert gas automatic surfacing equipment for inner surface of flange seal groove|
    法律状态:
    2020-12-18| BA2A| Patent application published|Ref document number: 2799648 Country of ref document: ES Kind code of ref document: A2 Effective date: 20201218 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930408A|ES2799648R1|2019-05-08|2019-05-08|Circumferential TIG welding equipment|ES201930408A| ES2799648R1|2019-05-08|2019-05-08|Circumferential TIG welding equipment|
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