A pulse-coordinated twin tungsten electrode surfacing device and method

Abstract

The present application relates to a kind of based on pulse coordination's double tungsten electrode surfacing device and method, it is related to surfacing technology field, including welding power supply, wire feeder, trigger, electrical control system and double tungsten electrode welding torch, trigger, welding power supply and wire feeder are sequentially electrically connected, welding power supply is electrically connected with electrical control system, double tungsten electrode welding torch is electrically connected with welding power supply;Trigger is electrically connected with electrical control system, trigger is used to carry out pulse regulation to welding power supply according to the welding parameter obtained by electrical control system, to make wire feeder carry out wire feeding, wherein, welding parameter includes pulse parameter and vibration frequency, pulse regulation includes pulse form regulation and phase difference regulation;Double tungsten electrode welding torch is used to carry out surfacing when wire feeder wire feeding.The beneficial effects of the present application: by setting trigger, realize pulsation, vibration wire feeding using pulse coordination, accurately adjust the wire feeding speed of surfacing device, improve the welding quality and welding efficiency of surfacing device.

Description

Technical Field

[0001] This invention relates to the field of surfacing technology, and more specifically, to a pulse-coordinated dual tungsten electrode surfacing apparatus and method. Background Technology

[0002] The nuclear reactor pressure vessel is a core piece of equipment that cannot be replaced throughout the entire lifespan of a nuclear power plant, and its importance is self-evident. During the manufacturing process of the nuclear reactor pressure vessel, the welding process is of paramount importance.

[0003] Currently, commonly used surfacing equipment includes strip electrode surfacing equipment, manual electric arc welding equipment, and argon arc welding equipment. Strip electrode surfacing equipment has high deposition efficiency and simple control methods, but it requires high operational skills, is prone to defects, and its weld quality is susceptible to problems. Manual electric arc welding equipment has a low degree of automation, and its weld quality is easily affected by the operator, resulting in unstable production quality and efficiency. Argon arc welding equipment has moderate control complexity, but when used for surfacing, its large heat-affected zone can lead to cracking and deformation of the workpiece after welding repair, resulting in lower weld quality and efficiency. Summary of the Invention

[0004] The problem addressed by this invention is how to improve the production quality and efficiency of welding equipment.

[0005] To address the above problems, the present invention provides a pulse-coordinated dual tungsten electrode welding apparatus and method.

[0006] In a first aspect, the present invention provides a pulse-coordinated dual tungsten inert gas (TIG) welding apparatus, comprising a welding power source, a wire feeder, a trigger, an electrical control system, and a dual tungsten inert gas (TIG) welding torch. The trigger, the welding power source, and the wire feeder are electrically connected in sequence. The welding power source is electrically connected to the electrical control system, and the dual tungsten inert gas (TIG) welding torch is electrically connected to the welding power source.

[0007] The trigger is electrically connected to the electrical control system. The trigger is used to pulse adjust the welding power supply according to the welding parameters obtained by the electrical control system so that the wire feeder can feed wire. The welding parameters include pulse parameters and vibration frequency. The pulse adjustment includes pulse form adjustment and phase difference adjustment.

[0008] The dual tungsten inert gas (TIG) welding torch is used for overlay welding during wire feeding by the wire feeder.

[0009] Optionally, the wire feeder is equipped with a standard welding wire and a vibrating welding wire, and the vibrating welding wire is stacked on the standard welding wire. The wire feeder is used to make the vibrating welding wire vibrate along the wire feeding direction according to the vibration frequency, so as to realize vibrating wire feeding.

[0010] Optionally, it also includes a monitoring device and an operation panel with communication connection. The operation panel is communicatively connected to the electrical control system, and the monitoring device is communicatively connected to the operation panel. The monitoring device is used to acquire welding information in real time and send the welding information to the operation panel. The operation panel is used to send the judgment result to the electrical control system after judging the welding risk based on the welding information. The welding information includes welding torch position information and workpiece position information.

[0011] Optionally, the pulse-coordinated dual tungsten electrode welding device further includes an alarm device electrically connected to the operation panel for triggering an alarm when there is a risk of welding failure.

[0012] Optionally, the pulse-coordinated dual tungsten electrode welding apparatus further includes a hot wire power supply;

[0013] The hot wire power supply is electrically connected to the electrical control system and the wire feeder. The hot wire power supply is used to preheat the standard welding wire and the vibrating welding wire before the wire feeder feeds the wire, based on the control of the electrical control system.

[0014] Optionally, the pulse-coordinated dual tungsten electrode welding apparatus further includes two cooling systems and a worktable;

[0015] The two cooling systems are respectively disposed on both sides of the dual tungsten inert gas welding torch. The cooling systems are electrically connected to the electrical control system and are used to cool the dual tungsten inert gas welding torch during welding based on the control of the electrical control system.

[0016] The worktable is a turntable electrically connected to the electrical control system, and the worktable is correspondingly arranged with the dual tungsten inert gas welding torch to fix the workpiece and drive the workpiece to rotate under the control of the electrical control system.

[0017] Optionally, the pulse-coordinated dual tungsten electrode welding apparatus further includes a gas supply system;

[0018] The gas supply system is connected to the dual tungsten inert gas (TIG) welding torch and is electrically connected to the electrical control system. The gas supply system is used to supply shielding gas to the TIG welding torch during welding based on the control of the electrical control system.

[0019] Secondly, the present invention also provides a pulse-coordinated dual tungsten inert gas (TIG) welding method, based on the pulse-coordinated dual TIG welding apparatus as described above, wherein the pulse-coordinated dual TIG welding method includes:

[0020] The welding parameters sent by the control system are obtained by using a trigger, and the welding power supply is pulse-adjusted according to the pulse parameters. The pulse adjustment includes pulse form adjustment and phase difference adjustment. The welding parameters are obtained according to the welding position of the workpiece and include pulse parameters and vibration frequency.

[0021] The wire is fed using a wire feeder based on the output pulses of the welding power source and the vibration frequency.

[0022] The workpiece is overlaid with a dual tungsten inert gas welding torch while the wire is being fed by the wire feeder.

[0023] Optionally, the method for obtaining welding parameters based on the welding position of the workpiece includes:

[0024] The welding characteristics are obtained based on the welding position.

[0025] A pulse combination is obtained based on the aforementioned welding characteristics;

[0026] The welding parameters are obtained based on the pulse combination.

[0027] Optionally, the control method of the pulse-coordinated dual tungsten electrode welding device further includes:

[0028] Acquire initial welding information and real-time welding information sent by the monitoring device;

[0029] The real-time welding information is compared with the initial welding information, and the presence of weld overlay risk is determined based on the comparison result.

[0030] The beneficial effects of this invention are as follows:

[0031] Using a dual tungsten inert gas (TIG) welding torch generates a composite welding arc, characterized by high arc energy, low arc voltage, increased wire cladding rate, and reduced dilution rate. This reduces welding defects such as burn-through and humps, improving weld quality. A trigger is electrically connected to the control system and welding power supply. After acquiring pulse parameters, the output current of the welding power supply is precisely adjusted, allowing the wire feeder to adjust its feeding speed accordingly. This enables high-quality welding based on different workpiece welding positions. For example, using two welding power supplies and two wire feeders, when the workpiece is in a horizontal welding position, the trigger adjusts the output current of both welding power supplies to pulses and adjusts parameters such as phase difference based on actual conditions. The two wire feeders feed wire according to the pulses of the two welding power supplies, performing high-quality welding for horizontal welding positions. This effectively increases welding efficiency, improves the production quality and efficiency of the welding equipment, and enhances its intelligence. Simultaneously, the wire feeder can achieve vibratory wire feeding based on the vibration frequency, which stirs the molten pool, refines the grains, makes the weld overlay structure uniform, optimizes weld formation, effectively improves the fluidity of the weld pool, and thus increases welding efficiency. High-precision pulsating and vibratory wire feeding is achieved through a trigger, effectively reducing welding heat and workpiece deformation, shrinking the heat-affected zone of the weld, resulting in higher impact resistance, improved welding quality, and increased production efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the pulse-coordinated dual tungsten electrode welding device according to an embodiment of the present invention. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the structure of the pulse-coordinated dual tungsten electrode welding device according to an embodiment of the present invention. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the weld formation after the overlay welding is completed according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic flowchart of the pulse-coordinated dual tungsten electrode welding method according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the first pulse combination current configuration according to an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the second pulse combination current configuration according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the third pulse combination current configuration according to an embodiment of the present invention;

[0039] Figure 8This is a schematic diagram of the fourth pulse combination current configuration according to an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the fifth pulse combination current pattern according to an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the sixth pulse combination current configuration according to an embodiment of the present invention;

[0042] Figure 11 This is a schematic diagram of the seventh pulse combination current pattern in an embodiment of the present invention.

[0043] Figure label description:

[0044] 1-Operation panel; 2-Electrical control system; 3-Trigger; 4-First welding power source; 5-Second welding power source; 6-First wire feeder; 7-Second wire feeder; 8-First hot wire power source; 9-Second hot wire power source; 10-First air supply system; 11-Second air supply system; 12-First cooling system; 13-Second cooling system; 14-Dual tungsten inert gas torch; 15-Worktable; 16-Workpiece. Detailed Implementation

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] In the description of the embodiments in this application, the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same implementation or instance. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a pulse-coordinated dual tungsten inert gas (TIG) welding device, including a welding power source, a wire feeder, a trigger 3, an electrical control system 2, and a dual tungsten inert gas (TIG) welding torch 14. The trigger 3, the welding power source, and the wire feeder are electrically connected in sequence. The welding power source is electrically connected to the electrical control system 2, and the dual tungsten inert gas (TIG) welding torch 14 is electrically connected to the welding power source.

[0048] The trigger 3 is electrically connected to the electrical control system 2. The trigger 3 is used to pulse adjust the welding power supply according to the welding parameters obtained by the electrical control system 2 so that the wire feeder can feed wire. The welding parameters include pulse parameters and vibration frequency. The pulse adjustment includes pulse form adjustment and phase difference adjustment.

[0049] The dual tungsten inert gas welding torch 14 is used for overlay welding when the wire feeder feeds wire.

[0050] Specifically, such as Figure 1 The pulse-coordinated dual tungsten inert gas (TIG) welding apparatus shown includes a welding power source, a wire feeder, a trigger 3, an electrical control system 2, and a dual tungsten inert gas (TIG) welding torch 14. The electrical control system 2 is electrically connected to the dual tungsten inert gas (TIG) welding torch 14, the welding power source, and the wire feeder, and is used to control the pulse-coordinated dual tungsten inert gas (TIG) welding apparatus for welding. The dual tungsten inert gas (TIG) welding torch 14 is connected to the welding power source, which provides power for the welding movement of the dual tungsten inert gas (TIG) welding torch 14. Using the dual tungsten inert gas (TIG) welding torch 14, a composite welding arc can be generated through the two tungsten electrodes. Compared with the welding arc generated by a single tungsten electrode, the arc energy is higher, the arc voltage is lower, the wire cladding rate is increased, and the dilution rate is reduced, which can reduce the generation of welding defects such as burn-through and humps, and improve weld quality.

[0051] In this embodiment, two welding power sources and two wire feeders are provided, namely a first welding power source 4, a first wire feeder 6, a second welding power source 5, and a second wire feeder 7. The first welding power source 4 is electrically connected to the first wire feeder 6, and controls the first wire feeder 6 to perform pulsating vibration wire feeding by output current and vibration frequency. The second welding power source 5 is electrically connected to the second wire feeder 7, and controls the second wire feeder 7 to perform pulsating vibration wire feeding by output current and vibration frequency. The wire feeding speed of the wire feeder can be adjusted by adjusting the output current and vibration frequency of the welding power source.

[0052] like Figure 2 As shown, trigger 3 is electrically connected to electrical control system 2 to acquire welding parameters sent by electrical control system 2, including pulse parameters and vibration frequency. Trigger 3 is electrically connected to the first welding power source 4 and the second welding power source 5 in the two wire feeding systems. After acquiring the pulse parameters, trigger 3 adjusts the output pulses of the first welding power source 4 and the second welding power source 5. Specifically, it adjusts the type of current output (pulse or DC) of the two welding power sources, or adjusts the phase difference (adjustable range 0°-180°) when both welding power sources output pulses, to adjust the wire feeding speed of the wire feeder. This allows for welding based on the welding position of workpiece 16. For example, when the welding position of workpiece 16 is a flat welding position, trigger 3 adjusts the output of the two welding power sources to pulses with a phase difference of 180°. At this time, the wire feeding speeds of the two wire feeders are the same. When the welding power source is at its peak pulse, the wire feeder is at its peak wire feeding speed; when the welding power source is at its base pulse, the wire feeder is at its base wire feeding speed. The workpiece 16 welded by the dual tungsten inert welding torch 14 according to this wire feeding speed is shown below. Figure 3 As shown, its weld formation is excellent, and welding efficiency is improved.

[0053] Specifically, the welding power supply provided in this embodiment is tigSpeed ​​552Synergic HW, the wire feeder is tigSpeed ​​drive 4Rob, and the electrical control system 2 is 06UDVCPU+RT1456, including but not limited to the above-mentioned models.

[0054] In addition, the trigger 3 can also adjust the current magnitude according to the welding position of the workpiece 16.

[0055] In this embodiment, a dual tungsten inert gas (TIG) welding torch 14 is used for surfacing, which can generate a composite welding arc. This arc has high energy, low arc voltage, increased wire cladding rate, and reduced dilution rate, thus reducing welding defects such as burn-through and humps, and improving weld quality. A trigger 3 is electrically connected to the electrical control system 2 and the welding power supply. After acquiring pulse parameters, the output current of the welding power supply is precisely adjusted so that the wire feeder adjusts its wire feeding speed according to the adjusted output current. High-quality surfacing is performed according to different welding positions of the workpiece 16. For example, two welding power supplies and two wire feeders are used. When the welding position of the workpiece 16 is a horizontal welding position, the trigger 3 adjusts the output current of the two welding power supplies to pulses and adjusts parameters such as phase difference according to the actual situation. The two wire feeders feed wire according to the pulses of the two welding power supplies to perform high-quality welding of the horizontal welding position workpiece 16, effectively increasing surfacing efficiency, improving the production quality and efficiency of the surfacing device, and enhancing the intelligence level of the surfacing device. Simultaneously, the wire feeder can achieve vibratory wire feeding according to the vibration frequency, which stirs the molten pool, refines the grains, makes the weld overlay structure uniform, optimizes the weld formation, effectively improves the fluidity of the weld pool, and thus increases welding efficiency. High-precision pulsating and vibratory wire feeding is achieved through trigger 3, effectively reducing welding heat and workpiece deformation, shrinking the heat-affected zone of the weld, resulting in higher impact resistance, increasing welding quality, and improving production efficiency.

[0056] Optionally, the wire feeder is equipped with a standard welding wire and a vibrating welding wire, and the vibrating welding wire is stacked on the standard welding wire. The wire feeder is used to make the vibrating welding wire vibrate along the wire feeding direction according to the vibration frequency, so as to realize vibrating wire feeding.

[0057] Specifically, in a standard welding process, the wire feeder uses only one standard welding wire. However, in this embodiment, a vibrating welding wire is superimposed to achieve vibrating wire feeding. That is, the first wire feeder 6 and the second wire feeder 7 pulsately feed the standard welding wire according to the pulse current output by the welding power source. A vibrating welding wire is superimposed on each of the first wire feeder 6 and the second wire feeder 7. After the first welding power source 4 and the second welding power source 5 connected to the wire feeder obtain the vibration frequency, they control the first wire feeder 6 and the second wire feeder 7 to vibrate and feed the two vibrating welding wires according to the vibration frequency. During the vibrating wire feeding process, the vibrating welding wire moves back and forth along the wire feeding direction to achieve the stirring effect on the molten pool.

[0058] In this embodiment, by adding a vibrating welding wire to the wire feeder and feeding the vibrating welding wire according to the vibration frequency, the molten pool is stirred, which refines the grains, makes the weld overlay structure uniform, optimizes the weld formation, effectively improves the fluidity of the weld pool, and thus increases the welding efficiency.

[0059] Optionally, the pulse-coordinated dual tungsten electrode welding device in this embodiment further includes a monitoring device and an operation panel 1 connected by communication. The operation panel 1 is connected to the electrical control system 2, and the monitoring device is connected to the operation panel 1. The monitoring device is used to acquire welding information in real time and send the welding information to the operation panel 1. The operation panel 1 is used to judge the welding risk based on the welding information, wherein the welding information includes welding torch position information and workpiece position information.

[0060] Specifically, the operation panel is communicatively connected to both the monitoring device and the electrical control system 2. The operation panel is a touchscreen panel used by the operator to manually input welding parameters and send them to the electrical control system 2. The monitoring device is electrically connected to the electrical control system 2. The monitoring device can be a vision sensor and / or a position sensor, and is installed at the welding point of the dual tungsten inert gas welding torch 14 on the workpiece 16 (it can be connected to the electrical control device via a connecting rod and wires. Due to the high temperature at the welding point, to ensure the normal operation of the monitoring device, the connecting rod can be used to set the monitoring device at a preset distance from the welding point). The monitoring device is communicatively connected to the operation panel 1. Before the dual tungsten inert gas welding device operates according to the welding parameters, it acquires welding information, namely the position information of the dual tungsten inert gas welding torch 14 and the welding position information of the workpiece 16, and sends it to the operation panel 1. The operation panel 1 determines whether the welding information corresponds to the set welding parameters. If they do not correspond, it determines that there is a risk in the welding and stops welding; if they correspond, it determines that there is no risk in the welding and starts welding according to the set welding parameters. Meanwhile, during the welding process, the tilt angle of the dual tungsten inert welding torch 14 and the welding position of the workpiece 16 may shift, resulting in a reduction in the weld quality. At this time, the monitoring device acquires the position information of the dual tungsten inert welding torch 14 and the welding position information of the workpiece 16 in real time, and sends them to the operation panel 1 for welding risk assessment. When a welding risk is determined, welding is stopped in time to avoid producing substandard products and increasing production costs.

[0061] In this embodiment, a monitoring device is connected to the operation panel 1 for communication, enabling real-time acquisition of welding information. This information is then sent to the operation panel 1 for risk assessment and subsequently to the electrical control system 2. When a risk is detected, the electrical control system 2 controls the welding power supply, wire feeder, and dual tungsten electrode welding torch to stop moving, thereby promptly halting the welding process. Real-time acquisition of welding information allows for real-time monitoring of the welding torch and workpiece positions, preventing welding from proceeding when there are deviations between the two positions, which could lead to decreased welding quality, increased production and time costs, and effectively improves welding efficiency and quality.

[0062] Optionally, the pulse-coordinated dual tungsten electrode welding device in this embodiment also includes an alarm device, which is electrically connected to the operation panel 1 and is used to issue an alarm when there is a risk of welding failure.

[0063] Specifically, an alarm device is also provided on the operation panel 1. The alarm device can be a multi-color light alarm device or an audible alarm device. For example, when the operation panel 1 determines that there is a welding risk based on the welding information sent by the monitoring device, the light alarm device switches from green to red to prompt the operator to take action. When there is no risk, the light alarm device remains green to prompt the operator that the welding device is operating normally. Or, when there is a risk, the audible alarm device sounds to prompt the operator to take action.

[0064] In this embodiment, by setting an alarm device, an alarm can be triggered when the operation panel 1 determines that there is a welding risk in the welding device, so as to prompt the operator to deal with it in time and avoid the welding device being stopped for too long, which would reduce production efficiency.

[0065] Optionally, the pulse-coordinated dual tungsten electrode welding apparatus of this embodiment also includes a hot wire power supply;

[0066] The hot wire power supply is electrically connected to the electrical control system 2 and the wire feeder. The hot wire power supply is used to preheat the standard welding wire and the vibrating welding wire before the wire feeder feeds the wire, based on the control of the electrical control system 2.

[0067] Specifically, such as Figure 1 As shown, this embodiment is equipped with two hot wire power supplies, namely a first hot wire power supply 8 and a second hot wire power supply 9, which are electrically connected to the electrical control system 2. The first hot wire power supply 8 is electrically connected to the first wire feeder 6, and the second hot wire power supply 9 is electrically connected to the second wire feeder 7. The electrical control system 2 controls the first hot wire power supply 8 and the second hot wire power supply 9 to preheat the standard welding wire and the vibrating welding wire respectively when the first wire feeder 6 and the second wire feeder 7 are running, so that the welding wire is preheated before entering the molten pool.

[0068] The hotwire power supply used in this embodiment is a Tetrix 200 Smart Hotwire, but it is not limited to this model.

[0069] In this embodiment, by setting a hot wire power supply and connecting it to the wire feeder, the electrical control system 2 and the welding power supply, the welding wire fed into the molten pool can be preheated in advance, which improves the fluidity of the molten pool and the welding efficiency, making the droplet transfer easier.

[0070] Optionally, the pulse-coordinated dual tungsten electrode welding apparatus of this embodiment also includes two cooling systems and a worktable 15;

[0071] The two cooling systems are respectively disposed on both sides of the dual tungsten inert gas welding torch 14. The cooling systems are electrically connected to the electrical control system 2. The cooling systems are used to cool down the dual tungsten inert gas welding torch 14 during welding based on the control of the electrical control system 2.

[0072] The worktable 15 is a turntable electrically connected to the electrical control system 2, and the worktable 15 is correspondingly arranged with the dual tungsten inert gas welding torch 14, for fixing the workpiece 16 and driving the workpiece 16 to rotate under the control of the electrical control system 2.

[0073] Specifically, since the heat generated by the dual tungsten inert gas (TIG) welding torch 14 increases significantly during welding, failure to cool it down could affect welding quality and pose a safety hazard. Therefore, a first cooling system 12 and a second cooling system 13 are respectively installed on both sides of the TIG welding torch 14, and the first cooling system 12 and the second cooling system 13 are electrically connected to the electrical control system 2. The first cooling system 12 and the second cooling system 13 can be a cooling water system or a spray cooling system. The electrical control system 2 controls the first cooling system 12 and the second cooling system 13 to cool the TIG welding torch 14 during welding, ensuring the normal operation of the welding process. The cooling system in this embodiment uses a Cool82 U44, but is not limited to this model.

[0074] Two tungsten electrodes are installed in the welding torch to form a dual tungsten electrode welding torch 14. A 2m*2m welding manipulator is used as the main structure of the entire system. The welding torch carriage is set at the end of the main structure corresponding to the worktable 15 via a connecting plate at the end. The dual tungsten electrode welding torch 14 is set at the end of the manipulator via a connecting plate, corresponding to the worktable 15, so as to perform welding on the workpiece 16 set on the worktable 15.

[0075] The worktable 15 is a CZ2*2 model rotary table, which is electrically connected to the electrical control system 2. The electrical control system 2 drives the worktable 15 to rotate. The workpiece 16 can be placed on the worktable 15, fixed, and rotated to enable welding of the workpiece 16.

[0076] In this embodiment, by setting up two cooling systems, the dual tungsten inert gas (TIG) welding torch 14 can be effectively cooled, preventing the welding torch temperature from being too high and affecting the welding quality or causing accidents, thus ensuring welding quality while increasing welding efficiency. A rotating worktable 15 is set up corresponding to the dual TIG welding torch 14, which can fix and rotate the workpiece 16 to adjust the welding angle, so as to realize the cladding of multiple welding positions.

[0077] Optionally, the pulse-coordinated dual tungsten electrode welding device in this embodiment also includes a gas supply system;

[0078] The gas supply system is connected to the dual tungsten inert gas (TIG) welding torch 14 and is electrically connected to the electrical control system 2. The gas supply system is used to supply shielding gas to the TIG welding torch 14 during welding based on the control of the electrical control system 2.

[0079] Specifically, in this embodiment, a first gas supply system 10 and a second gas supply system 11 are provided, which are electrically connected to the electrical control system 2. The first gas supply system 10 is connected to the first wire feeder 6 through a gas supply pipe, and the second gas supply system 11 is connected to the second wire feeder 7 through a gas supply pipe, and is also connected to the dual tungsten inert gas (TIG) welding torch 14. The electrical control system 2 controls the first gas supply system 10 and the second gas supply system 11 to supply shielding gases, such as carbon dioxide and argon, to the TIG welding torch 14 as gaseous media for generating the electric arc when the first wire feeder 6 and the second wire feeder 7 are feeding wire.

[0080] In this embodiment, by setting up a gas supply system and connecting it to the dual tungsten inert gas (TIG) welding torch 14, a protective gas can be supplied to the TIG welding torch 14 during the welding process as a gas medium for generating an electric arc, thereby increasing welding efficiency, avoiding material oxidation, and improving weld quality.

[0081] like Figure 4 As shown, this embodiment also provides a pulse-coordinated dual tungsten inert gas (TIG) welding method, characterized in that, based on the pulse-coordinated dual tungsten inert gas (TIG) welding apparatus as described above, the pulse-coordinated dual tungsten inert gas (TIG) welding method includes:

[0082] Step S1: Use trigger 3 to obtain welding parameters, and adjust the pulses of the two welding power sources according to the pulse parameters. The pulse adjustment includes pulse form adjustment and phase difference adjustment. The welding parameters are obtained according to the welding position of the workpiece and include pulse parameters and vibration frequency.

[0083] Step S2: Use a wire feeder to feed the wire according to the pulse of the welding power source and the vibration frequency;

[0084] Step S3: Use the dual tungsten inert gas welding torch 14 to perform overlay welding while the wire feeder is feeding wire.

[0085] Specifically, before executing step S1, the operator needs to determine the welding parameters based on the welding position of the workpiece 16. These parameters include the pulse type, peak current, base current, arc voltage, pulse frequency, hot wire current, vibration frequency, welding speed, wire feed speed, and phase difference of the two welding power sources. These parameters are then input into the operation panel 1. The operation panel 1 sends the welding parameters to the electrical control system 2. The trigger 3, based on the welding frequency obtained from the electrical control system 2, adjusts the pulses of the two welding power sources according to the pulse parameters and vibration frequency, i.e., the pulse type (pulse or non-pulse) and phase difference of the two welding power sources. In step S2, after the output pulse adjustment of the two welding power sources is completed, the two wire feeders perform pulsating vibration wire feeding according to the output current and vibration frequency, thereby adjusting the wire feed speed.

[0086] To verify the performance of the pulse-coordinated dual tungsten inert gas (TIG) welding device in this embodiment, the following experiment was conducted using horizontal welding positions on the workpiece:

[0087] Set welding parameters: I p1 =I p2 =260A, I b1 =I b2 =100A, V 弧压 =10.5V, F1=F2=5Hz, I h1 =I h2 =60A, f1=f2=10Hz, V 焊 =220mm / min, V 送1 =V 送2 =5000mm / min, α=0°, θ1=θ2=180°.

[0088] Among them, I p1 and I p2 I represents the peak current of the first welding power source 4 and the second welding power source 5, respectively. b1 and I b2 These represent the base currents of the first welding power source 4 and the second welding power source 5, respectively, in V. 弧压 This represents the arc voltage, and F1 and F2 represent the pulse frequencies of the first welding power source 4 and the second welding power source 5, respectively. h1 and I h2 The first hot wire power supply 8 and the second hot wire power supply 9 represent the hot wire currents, respectively; f1 and f2 represent the vibration frequencies of the first welding power supply 4 and the second welding power supply 5, respectively; V 焊 V represents the welding speed. 送1 and V 送2 α represents the wire feeding speed of the first wire feeder 6 and the second wire feeder 7, respectively; α represents the welding torch tilt angle; and θ1 and θ2 represent the phase difference of the output pulses of the first welding power source 4 and the second welding power source 5, respectively.

[0089] After the trigger 3 acquires the above welding parameters, it adjusts the output current of the first welding power source 4 and the second welding power source 5 respectively. The first wire feeder 6 and the second wire feeder 7 perform pulsating vibration wire feeding according to the output current of the first welding power source 4 and the second welding power source 5 respectively. The dual tungsten inert welding torch 14 performs welding according to the wire feeding speed, the torch tilt angle and the welding speed, to obtain the desired result. Figure 3 The weld formation shown in this embodiment demonstrates that the pulse-coordinated dual tungsten inert gas welding device offers high welding quality, simple operation, high intelligence, and high efficiency.

[0090] In this embodiment, the welding parameters are acquired using trigger 3. Based on the welding parameters and vibration frequency, different current magnitudes, pulse modulations, and spatial positions are applied to the two welding power sources to achieve a synergistic effect. This allows the wire feeder to adjust its wire feeding speed according to the adjusted output current, thereby improving the fluidity of the molten pool and the welding efficiency, making droplet transfer easier. Simultaneously, the vibrating wire feed has a stirring effect on the molten pool, refining the grains, resulting in a uniform weld overlay structure, optimizing weld formation, ensuring high-quality production, and significantly increasing welding efficiency.

[0091] Optionally, the method for obtaining welding parameters based on the welding position of the workpiece includes:

[0092] The welding characteristics are obtained based on the welding position.

[0093] A pulse combination is obtained based on the aforementioned welding characteristics;

[0094] The welding parameters are obtained based on the pulse combination.

[0095] Specifically, based on the statistical analysis of welding data, this embodiment summarizes seven pulse combinations, such as... Figures 5 to 11 The figure shows the current configuration of 7 pulse combinations, where I1 is the first welding power source 4 and I2 is the second welding power source 5. Figure 5 The first pulse combination is DC+DC, and both the first welding power source 4 and the second welding power source 5 are DC. Figure 6 The second pulse combination is DC+P, where the first welding power source 4 is DC and the second welding power source 5 is pulsed. Figure 7 The third pulse combination is P+DC, where the first welding power source 4 is pulsed and the second welding power source 5 is DC. Figure 8 The fourth pulse combination is P0+P0, where the first welding power source 4 and the second welding power source 5 are both pulses with a phase difference of 0°. Figure 9 The fifth pulse combination is P180+P180. The first welding power source 4 and the second welding power source 5 are both pulses with a phase difference of 180°. Figure 10 The sixth pulse combination is PV+PV, where the first welding power source 4 and the second welding power source 5 are both pulses, and the phase difference can be customized. Figure 11 The seventh pulse combination is PT+PT. Both the first welding power source 4 and the second welding power source 5 are pulses, and the two pulses have a phase difference between them, with T1 being the leading phase difference and T2 being the lagging phase difference. In subsequent welding processes, this pulse combination can be directly retrieved for input, effectively improving welding efficiency.

[0096] In surfacing welding, the welding positions of workpiece 16 include flat welding position, horizontal welding position, and overhead welding position, each with different welding characteristics. For example, in the horizontal welding position, the molten pool metal flows to the lower side of the weld under the action of gravity. At this time, defects such as incomplete penetration and weld beads are likely to occur on the lower side of the weld, while defects such as undercut often occur on the upper side of the weld. In the overhead welding position, the molten pool metal is very easy to drip under the action of gravity. Therefore, the key to achieving high-speed welding in overhead welding is how to reasonably control the solidification process of the molten pool.

[0097] Based on the pulse characteristics, a corresponding pulse combination is selected for surfacing. For example, during flat welding, two tungsten electrodes are symmetrically distributed on both sides of the weld center axis. To maintain welding stability and the continuity of the molten pool metal on both sides of the weld bead, the two welding power sources maintain the same pulse current output and ensure a 180° phase difference. Therefore, the following method is adopted: Figure 9 The dual-pulse combination (P180+P180) shown effectively improves weld microstructure by stirring the molten pool through the arc. During horizontal welding, pulsed current control is used. A high current output is applied to the tungsten electrode on the lower side of the weld bead, ensuring sufficient penetration and suppressing downward flow of molten metal through voltage pressure. A low current output is applied to the tungsten electrode on the upper side of the weld bead, allowing the molten metal to flow upward under the higher arc pressure on the lower side, thus reducing undercut on the upper weld bead. Therefore, this method is employed... Figure 8 The dual-pulse combination (P0+P0) shown, by rationally allocating the current output of the two welding power sources, can obtain a weld with good surface formation while ensuring high deposition. Welding can be achieved by appropriately adjusting the magnitudes of the two tungsten electrode currents according to process requirements, ensuring excellent weld formation in the horizontal welding position. During overhead welding, the characteristics of the horizontal welding position can be solved by controlling the welding torch oscillation to synchronize with the tungsten electrode pulse current. When the welding torch oscillates and stops on one side of the weld bead, the tungsten electrode current closest to that side takes the pulse peak value, and the other tungsten electrode current takes the pulse base value; when the welding torch oscillates, the output current of both welding power sources takes the pulse base value. Therefore, the following method is adopted... Figure 5 , Figure 6 and Figure 7 The pulse combination control mode shown can ensure sufficient weld penetration while preventing excessive molten metal dripping under relatively low welding heat input conditions. Welding can be achieved by appropriately adjusting the magnitudes of the two tungsten electrode currents according to process requirements, ensuring excellent weld formation in horizontal welding positions. After selecting a suitable pulse combination, the pulse parameters and vibration frequency can be adjusted according to specific circumstances.

[0098] In this embodiment, the welding characteristics are determined by the welding position of workpiece 16, and a corresponding pulse combination is selected for the welding characteristics. The specific pulse parameters in the pulse combination are adjusted according to the actual situation, which can effectively increase the quality of the weld overlay without the need for real-time adjustment, thus increasing the weld overlay efficiency.

[0099] Optionally, the pulse-coordinated dual tungsten electrode welding method in this embodiment further includes:

[0100] Acquire initial welding information and real-time welding information sent by the monitoring device;

[0101] The real-time welding information is compared with the initial welding information, and the presence of weld overlay risk is determined based on the comparison result.

[0102] Specifically, the operation panel 1 is used to obtain real-time welding information sent by the monitoring device. Before the welding device is run, the monitoring device obtains the initial welding information and sends it to the operation panel 1. The operation panel 1 compares the initial welding information with the real-time welding information. If the real-time welding information is different from the initial welding information, the position of the workpiece or the position of the welding gun has changed. If welding is still carried out at this time, the welding quality will be reduced, and it will be judged that there is a welding risk and welding will be stopped.

[0103] In addition, after the welding equipment acquires the welding parameters but before operation, the monitoring device acquires the welding information at this time and sends it to the operation panel 1. The operation panel 1 compares it with the set welding parameters. If the welding information at this time matches the set welding parameters (for example, simulating the welding gun position and workpiece position according to the set welding parameters; if the simulated welding gun position and workpiece position are the same as the initial welding information, then it matches), then the welding will start. This can effectively ensure the welding quality and avoid batch product quality problems caused by the failure of the welding equipment.

[0104] In this embodiment, by comparing the real-time welding information and the initial welding information obtained by the monitoring device and making a risk assessment, it is possible to effectively avoid the positional changes of the dual tungsten inert welding torch 14 and the workpiece 16 during the welding process, which would lead to a reduction in the welding quality of the workpiece 16.

[0105] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A pulse-coordinated dual tungsten electrode welding apparatus, characterized in that, It includes a welding power source, a wire feeder, a trigger (3), an electrical control system (2), and a dual tungsten inert gas welding torch (14). The trigger (3), the welding power source, and the wire feeder are connected in sequence. The welding power source is connected to the electrical control system (2), and the dual tungsten inert gas welding torch (14) is connected to the welding power source. The trigger (3) is electrically connected to the electrical control system (2). The trigger (3) is used to pulse adjust the welding power supply according to the welding parameters obtained by the electrical control system (2) so that the wire feeder can feed wire. The welding parameters include pulse parameters and vibration frequency. The pulse adjustment includes pulse form adjustment and phase difference adjustment. The dual tungsten inert gas welding torch (14) is used to perform surfacing welding when the wire feeder feeds wire; The wire feeder is equipped with a standard welding wire and a vibrating welding wire, and the vibrating welding wire is stacked on the standard welding wire. The wire feeder is used to make the vibrating welding wire vibrate along the wire feeding direction according to the vibration frequency, so as to realize vibrating wire feeding.

2. The pulse-coordinated dual tungsten electrode welding apparatus according to claim 1, characterized in that, It also includes a monitoring device and an operation panel (1) with communication connection. The operation panel is connected to the electrical control system (2) with communication. The monitoring device is connected to the operation panel (1) with communication. The monitoring device is used to acquire welding information in real time and send the welding information to the operation panel (1). The operation panel (1) is used to send the judgment result to the electrical control system (2) after judging the welding risk based on the welding information. The welding information includes welding torch position information and workpiece position information.

3. The pulse-coordinated dual tungsten electrode welding apparatus according to claim 2, characterized in that, It also includes an alarm device, which is electrically connected to the operation panel (1) and is used to issue an alarm when there is a risk of weld overlay.

4. The pulse-coordinated dual tungsten electrode welding apparatus according to claim 1, characterized in that, It also includes the hot wire power supply; The hot wire power supply is electrically connected to the electrical control system (2) and the wire feeder. The hot wire power supply is used to preheat the standard welding wire and the vibrating welding wire before the wire feeder feeds the wire based on the control of the electrical control system (2).

5. The pulse-coordinated dual tungsten electrode welding apparatus according to claim 1, characterized in that, It also includes two cooling systems and a workbench (15); The two cooling systems are respectively disposed on both sides of the dual tungsten inert gas welding torch (14). The cooling systems are electrically connected to the electrical control system (2). The cooling systems are used to cool the dual tungsten inert gas welding torch (14) during welding based on the control of the electrical control system (2). The worktable (15) is a turntable electrically connected to the electrical control system (2), and the worktable (15) is correspondingly arranged with the dual tungsten electrode welding gun (14) for fixing the workpiece (16) and driving the workpiece (16) to rotate under the control of the electrical control system (2).

6. The pulse-coordinated dual tungsten electrode welding apparatus according to claim 5, characterized in that, It also includes the air delivery system; The gas supply system is connected to the dual tungsten inert gas (TIG) welding torch (14), the gas supply system is electrically connected to the electrical control system (2), and the gas supply system is used to supply protective gas to the TIG welding torch (14) during welding based on the control of the electrical control system (2).

7. A pulse-coordinated dual tungsten electrode welding method, characterized in that, Based on the pulse-coordinated dual tungsten inert gas (TIG) welding apparatus as described in any one of claims 1-6, the pulse-coordinated dual tungsten inert gas (TIG) welding method includes: Welding parameters are obtained using a trigger, and the welding power supply is pulse-adjusted according to the pulse parameters. The pulse adjustment includes pulse form adjustment and phase difference adjustment. The welding parameters are obtained according to the welding position of the workpiece and include pulse parameters and vibration frequency. The wire is fed using a wire feeder based on the output pulses of the welding power source and the vibration frequency. The workpiece is overlaid with a dual tungsten inert gas welding torch while the wire is being fed by the wire feeder.

8. The pulse-coordinated dual tungsten electrode welding method according to claim 7, characterized in that, The method for obtaining welding parameters based on the welding position of the workpiece includes: Welding characteristics are obtained based on the welding position; A pulse combination is obtained based on the aforementioned welding characteristics; The welding parameters are obtained based on the pulse combination.

9. The pulse-coordinated dual tungsten electrode welding method according to claim 7, characterized in that, Also includes: Acquire initial welding information and real-time welding information sent by the monitoring device; The real-time welding information is compared with the initial welding information, and the presence of weld overlay risk is determined based on the comparison result.

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