Panel moving type double-wire submerged arc welding machine and welding method

Abstract

The invention belongs to the technical field of welding equipment, and relates to a panel moving type double-wire submerged arc welding machine and a welding method.The panel moving type double-wire submerged arc welding machine comprises a frame body, and a welding flux hopper, a wire feeder mounting frame and a mounting frame are sequentially mounted on the frame body from top to bottom; two groups of wire feeders are mounted on the wire feeder mounting frame, and the angles of the wire feeders can be adjusted so as to adjust the welding wire conveying angle; two welding guns are mounted on the mounting frame, a welding flux spreading joint is fixed on one of the welding guns, the feeding end of the welding flux spreading joint is hermetically connected with the discharging end of a welding flux hopper through a conveying pipe, and the positions and the angles of the welding guns can be adjusted; a recovery suction nozzle is installed on the installation frame and driven by a driving component to recover redundant welding flux. According to the welding structure, the operation time of a welding seam can be greatly shortened through double-wire welding, meanwhile, the angle of the wire feeder is adjustable, the wire feeding smoothness can be adjusted, and welding is more stable.

Description

Technical Field

[0001] This invention belongs to the technical field of welding equipment, and relates to a panel-moving double-wire submerged arc welding machine and welding method. Background Technology

[0002] Medium-thick to thick plates (thickness range of 10-50mm and above) are widely used as main load-bearing components in shipbuilding, large steel structures, pressure vessels, and bridge engineering. The manufacturing process of these components involves numerous long welds and deep groove welds, placing high demands on welding efficiency, forming quality, and automation levels.

[0003] Currently, single-wire submerged arc welding technology is widely used in production due to its advantages such as stable welding process, aesthetically pleasing weld formation, and no spatter. However, single-wire submerged arc welding has significant limitations when welding long welds in thick plates: its deposition efficiency is low, welding speed is limited, resulting in longer overall operation time and lower production efficiency. Furthermore, under high-speed welding or high heat input conditions, welding defects such as undercut, porosity, and lack of fusion are prone to occur, making it difficult to guarantee consistent weld quality and increasing the cost of subsequent repair and inspection.

[0004] To improve welding efficiency, some twin-wire submerged arc welding (TSA) equipment has emerged in existing technologies. TSA, through the coordinated work of two welding wires, can theoretically significantly improve deposition rate and welding speed. However, existing TSA equipment still has many shortcomings in practical applications: the equipment structure is rigid but lacks flexibility; the wire feeding mechanism and welding torch angle adjustment range are limited, making it difficult to adapt to complex and varied bevel shapes; welding torch alignment mainly relies on manual pre-adjustment, lacking real-time tracking and dynamic correction capabilities during welding; in long weld seams, factors such as workpiece assembly errors and thermal deformation can easily cause the welding torch to deviate from the preset trajectory, affecting welding quality; flux recovery systems are usually fixed or inconvenient to adjust, making it difficult to achieve precise synchronization with the welding torch movement, resulting in incomplete flux recovery, affecting the working environment and flux reuse rate; the overall system's automation and intelligence levels are low, and the adaptability of welding parameters and process stability need improvement, limiting its widespread application in high-quality applications.

[0005] Therefore, there is an urgent need in this field for a dual-wire submerged arc welding device with high-precision trajectory tracking, a flexible and adjustable wire feeding and welding torch system, and efficient synchronous flux recovery, in order to solve the above-mentioned problems in the existing technology and meet the needs of modern industry for efficient, high-quality, and automated welding of thick plates and long welds. Summary of the Invention

[0006] This invention provides a panel-moving dual-wire submerged arc welding machine and welding method, which can solve the technical problems of low welding torch centering accuracy, inability to correct welding trajectory, inconvenience in adjusting wire feeding angle, and incomplete flux recovery in existing dual-wire submerged arc welding equipment when welding long welds in thick plates.

[0007] According to the technical solution of the present invention: a panel-moving double-wire submerged arc welding machine, characterized in that: it includes a frame, wherein a flux hopper, a wire feeder mounting frame, and a mounting frame are installed sequentially from top to bottom on the frame; Two sets of wire feeders are installed on the wire feeder mounting frame. The wire feeders are angle-adjustable to adjust the angle of the welding wire feed. Two welding torches are mounted on the mounting frame. A flux spreading connector is fixed to one of the welding torches. The feed end of the flux spreading connector is sealed to the discharge end of the flux hopper through a conveying pipe. The position and angle of the welding torch can be adjusted. The mounting bracket is equipped with a recovery nozzle, which is driven by a drive component to recover excess flux; A laser tracker is installed on the frame to detect the weld seam trajectory in real time and feed it back to the control system, thereby achieving dynamic correction of the welding torch position.

[0008] As a further improvement of the present invention, the wire feeder mounting frame is provided with a waist-shaped adjustment groove, and the base of the wire feeder is locked to the waist-shaped adjustment groove by bolts, so as to realize the angle adjustment of the wire feeder within the range of 0° to 30°.

[0009] As a further improvement of the present invention, a cross-shaped fine-tuning component is installed on the mounting bracket to adjust the position of the welding torch in the horizontal and vertical directions; The cross-shaped fine-tuning assembly includes a first fine-tuning seat and a second fine-tuning seat arranged perpendicularly to each other. The first fine-tuning seat is fixed to the lower inner side of the mounting bracket. The screw nut fixed on the second fine-tuning seat is threadedly engaged with the first screw rod installed on the first fine-tuning seat. A first tightening screw is installed on the first fine-tuning seat to tighten the first screw rod. The second lead screw is installed on the second fine-tuning seat. The nut of the fixed shaft seat is threadedly engaged with the second lead screw. The second tightening screw is installed on the second fine-tuning seat to tighten the second lead screw. A fixed shaft is installed on the fixed shaft seat. The first clamping block is locked and fixed to the fixed shaft by screws. The second clamping block is fixedly connected to the first clamping block. The conductive rod is fixed between the first clamping block and the second clamping block. The welding wire led out by the wire feeder passes through the conductive rod.

[0010] As a further improvement of the present invention, the driving component includes a cylinder, a linear guide rail, a slider, a connecting seat, a locking handle, a first clamp, and a second clamp. The linear guide rail is installed on the side of the mounting frame, the cylinder is installed on the top of the mounting frame, the slider is slidably disposed on the linear guide rail, and the piston rod end of the cylinder is fixedly connected to the slider. The second clamp is installed on the connecting seat, and the first clamp and the second clamp are locked together by the locking handle to fix the retrieval nozzle.

[0011] As a further improvement of the present invention, the laser tracker can adjust its position in the vertical and horizontal directions, and provide real-time feedback of weld position information to the control system. The control system dynamically adjusts the horizontal and vertical positions of the welding torch based on the feedback information.

[0012] This invention also provides a welding method for a panel-moving dual-wire submerged arc welding machine, using the aforementioned panel-moving dual-wire submerged arc welding machine, the welding method comprising the following steps: Phase 1: Pre-welding preparation 1a. Beveling preparation: Machining an X-shaped or V-shaped bevel on the edge of the thick plate to be welded and cleaning it; 1b. Assembly and tack welding: Align the steel plates and leave welding gaps, then fix them using tack welding; 1c. Welding machine positioning and adjustment: Move the welding head to the beginning of the weld and connect the power and gas supply; 1d. Welding torch centering and fine adjustment: Finely adjust the position of the welding torch in the horizontal and vertical directions using the cross-shaped fine adjustment component to ensure that the welding wire is aligned with the center of the bevel; adjust the angle of the wire feeder and lock it. 1e. Auxiliary component adjustment: Adjust the position and height of the flux application joint and the recovery nozzle; 1f. Parameter settings: Set the current, voltage and welding speed of the front wire and the rear wire in the control system; the front wire uses DC reverse connection and the rear wire uses AC or DC positive connection. The front wire current is set to 800A to 1200A, and the voltage is set to 28V to 35V; the rear wire current is set to 500A to 800A, and the voltage is set to 32V to 40V; the welding speed is set to 30 cm / min to 60 cm / min. 1g. Enable laser tracker: Activate the laser tracker to identify and learn the precise trajectory of the weld seam; Phase Two: Welding Execution 2a. Start welding: Simultaneously activate flux spreading, dual arc ignition, welding machine movement, and flux recovery functions; 2b. Real-time tracking and dynamic correction: The weld trajectory is detected in real time by a laser tracker and the data is fed back to the control system. The control system dynamically adjusts the lateral and vertical positions of the welding torch through a PID algorithm, with a correction frequency of not less than 10Hz. 2c. Flux recovery: The recovery nozzle moves closely to the workpiece surface under the drive of the cylinder, simultaneously recovering unmelted flux; Phase 3: Post-welding finishing 3a. Stop operation: When welding reaches the end point, stop wire feeding, movement and flux recovery in sequence; 3b. Slag Removal and Inspection: Remove the slag crust from the weld surface and perform a visual inspection; Phase Four: Final Inspection 4a. Non-destructive testing: Perform ultrasonic or radiographic testing on the cooled weld to inspect its internal quality.

[0013] Furthermore, in step 1a, the bevel has a blunt edge and a gap.

[0014] Furthermore, in step 1b, the spot welding is performed by manual welding or carbon dioxide gas shielded welding.

[0015] Furthermore, in step 1d, the angle adjustment range of the wire feeder is 0° to 30°.

[0016] Furthermore, thick plates require multiple passes and layers of welding. The weld surface must be cleaned of spatter and impurities with a wire brush or angle grinder. Adjust the cross-shaped fine adjustment component of the welding torch to raise the torch to the height required for the next weld and finely adjust its lateral position to cover the entire bevel width. Repeat steps 1d through 2c until the entire bevel is filled; after all welding passes are completed, wait for the weld to cool to room temperature; according to process requirements, perform ultrasonic or radiographic testing on the weld to ensure that the weld quality meets the requirements.

[0017] The technical advantages of this invention are as follows: The product has a reasonable and ingenious structure. During operation, two welding wires melt and fill the weld simultaneously, resulting in a deposition rate far exceeding that of single-wire welding. When welding welds of the same specifications, the welding speed is significantly increased. For thick plates, double-wire welding can complete a thicker weld in one pass, significantly reducing the number of welding passes. By precisely controlling the energy ratio of the two wires, the incidence of welding defects such as undercut, porosity, and lack of fusion can be effectively reduced. The "tempering" effect of the rear wire on the molten pool also improves the microstructure of the weld metal and enhances its mechanical properties. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 for Figure 1 The CC view. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] Figure 1 , 2 The present invention includes a recycling nozzle 1, a locking handle 2, a connecting seat 3, a cylinder 4, a wire feeder 5, a wire feeder mounting frame 6, a flux hopper 7, a frame 8, a mounting frame 9, a conductive rod 10, a laser tracker 11, a flux spreading connector 12, a first clamp 13, a second clamp 14, a slider 15, a linear guide rail 16, a first fine-tuning seat 17, a fixed shaft seat 18, a fixed shaft 19, a first clamping block 20, a second clamping block 21, a second fine-tuning seat 22, and a control system, etc.

[0023] like Figure 1 , 2 As shown, the present invention is a panel-moving dual-wire submerged arc welding machine, including a frame 8, wherein a flux hopper 7, a wire feeder mounting frame 6, and a mounting frame 9 are installed sequentially from top to bottom on the frame 8; Two sets of wire feeders 5 are installed on the wire feeder mounting frame 6. The wire feeders 5 are angle-adjustable to adjust the angle of the welding wire feeding. Two welding guns are installed on the mounting frame 9. A flux spreading connector 12 is fixed on one of the welding guns. The feed end of the flux spreading connector 12 is sealed to the discharge end of the flux hopper 7 through a conveying pipe. The position and angle of the welding gun can be adjusted. The mounting bracket 9 is equipped with a recovery nozzle 1, which is driven by a drive component to recover excess flux. A laser tracker 11 is installed on the frame 8 to detect the weld seam trajectory in real time and feed it back to the control system, enabling dynamic correction of the welding torch position. The laser tracker 11 feeds data back to the control system in real time, and the control system dynamically adjusts the welding torch position using a PID algorithm. The control system is a comprehensive automation platform integrating an industrial computer / PLC, motion control card, data acquisition card, dedicated software, and PID control algorithm. It realizes closed-loop control from "perception" to "decision" to "execution," and is a core technology carrier for solving technical problems such as "low welding torch alignment accuracy and inability to correct welding trajectory," and is a mature product in the existing technology. In this application, the PID algorithm is used to achieve high-precision trajectory tracking and dynamic correction functions, converting the position information acquired by the laser tracker 11 into precise, smooth, and stable control actions of the welding torch. The laser tracker 11 uses the PID algorithm to calculate errors and drive the actuator.

[0024] Proportional term (P): Directly proportional to the current error. The larger the error, the stronger the corrective force.

[0025] Integral term (I): Accumulates past errors. Used to eliminate static errors and make the system more accurate.

[0026] Differential term (D): The trend of prediction error. Used to suppress overshoot and oscillations, making the system more stable.

[0027] In summary, the formula for the discretized PID algorithm is as follows: Output = Kp × e(t) + Ki × ∑e(t) + Kd × (e(t) - e(t-1)) in: Kp, Ki, and Kd are the proportional, integral, and differential coefficients, respectively. e(t) is the error at the current time (target position - actual position). ∑e(t) is the total error from the beginning to the present. e(t)-e(t-1) is the difference between the current error and the error at the previous time step. The wire feeder mounting frame 6 is provided with a waist-shaped adjustment groove. The base of the wire feeder 5 is locked to the waist-shaped adjustment groove by bolts, so that the angle of the wire feeder can be adjusted within the range of 0° to 30°.

[0028] The mounting bracket 9 is equipped with a cross-shaped fine-tuning component to adjust the position of the welding torch in the horizontal and vertical directions; The cross-shaped fine-tuning assembly includes a first fine-tuning seat 17 and a second fine-tuning seat 22 arranged perpendicularly to each other. The first fine-tuning seat 17 is fixed to the lower inner side of the mounting bracket 9. The screw nut fixed on the second fine-tuning seat 22 is threadedly engaged with the first screw installed on the first fine-tuning seat 17. A first tightening screw is installed on the first fine-tuning seat 17 to tighten the first screw. A second lead screw is installed on the second fine-tuning seat 22, the nut of the fixed shaft seat 18 is threadedly engaged with the second lead screw, and a second tightening screw is installed on the second fine-tuning seat 22 to tighten the second lead screw; A fixed shaft 19 is mounted on the fixed shaft seat 18. A first clamping block 20 is fixedly fastened to the fixed shaft 19 by screws. A second clamping block 21 is fixedly connected to the first clamping block 20. A conductive rod 10 is fixed between the first clamping block 20 and the second clamping block 21. The welding wire led out by the wire feeder 5 passes through the conductive rod 10. The fixed shaft seat 18 is provided with a waist-shaped groove, and the fixed shaft 19 can be rotated and adjusted relative to the waist-shaped groove. The rotation of the fixed shaft 19 realizes the angle adjustment of the welding torch.

[0029] The driving component includes a cylinder 4, a linear guide rail 16, a slider 15, a connecting seat 3, a locking handle 2, a first clamp 13, and a second clamp 14. The linear guide rail 16 is installed on the side of the mounting frame 9, the cylinder 4 is installed on the top of the mounting frame 9, the slider 15 is slidably disposed on the linear guide rail 16, and the piston rod end of the cylinder 4 is fixedly connected to the slider 15. The second clamp 14 is installed on the connecting seat 3, and the first clamp 13 and the second clamp 14 are locked together by the locking handle 2 to fix the recycling nozzle 1.

[0030] The laser tracker 11 can be adjusted vertically and horizontally, and provides real-time feedback of weld position information to the control system. The control system dynamically adjusts the lateral and vertical positions of the welding torch based on the feedback information. By detecting the weld trajectory in real time through the laser tracker 11, dynamic correction of the welding torch is achieved, and flux is recovered simultaneously.

[0031] like Figure 1 , 2 As shown, the present invention also provides a welding method for a panel-moving dual-wire submerged arc welding machine, using the aforementioned panel-moving dual-wire submerged arc welding machine, the welding method comprising the following steps: Phase 1: Pre-welding preparation Beveling preparation: 1a. Machining the edges of the thick plate to be welded into appropriate bevels (commonly X-type or V-type bevels), leaving suitable blunt edges and gaps. The bevels must be clean and free of impurities such as rust, oil, and moisture.

[0032] 1b. Preparation and application: Align the two steel plates according to the process requirements, leaving an appropriate welding gap (usually using a mounting plate or a support plate for fixation).

[0033] Use manual welding or CO2 gas shielded welding for tack welding. The length and spacing of the tack welds must meet the specifications to ensure that the plates will not be misaligned or cracked during the actual welding.

[0034] 1c. Welding machine positioning and adjustment: Install the entire welding head (frame 8) onto the automated welding manipulator or gantry-type traveling trolley and move it above the start of the weld.

[0035] Connect the system power supply and air source (compressed air is required to drive cylinder 4 of the recovery nozzle).

[0036] 1d. Welding torch centering and fine-tuning: Using the cross-shaped fine-tuning assembly: manually rotate the first and second lead screws to finely adjust the positions of the two welding torches (conductive rods 10) in the horizontal and vertical directions, ensuring that the two welding wires are precisely aligned with the center of the bevel.

[0037] Adjust the wire feeder angle: Based on the bevel angle, loosen the bolts on the waist-shaped adjustment groove of the wire feeder mounting bracket 6, and adjust the angles of the two sets of wire feeders 5 so that the welding wire is fed into the molten pool at the optimal angle (e.g., the front wire is vertical and the rear wire is slightly inclined). After adjustment, tighten the bolts.

[0038] 1e. Adjust the position and height of the flux spreading joint 12 and the recovery nozzle 1 to ensure that the flux can be accurately spread and effectively recovered. That is, the recovery nozzle 1 can effectively solve the problem of incomplete flux recovery.

[0039] 1f. Parameter settings: Set welding parameters on the control system: Front wire (main wire): Use DC reverse polarity, high current (e.g., up to 1000A), low voltage, responsible for deep penetration and weld penetration.

[0040] Follow wire: Using AC or DC positive polarity, with a smaller current (e.g., up to 700A) and a higher voltage, it is responsible for filling, controlling the shape of the molten pool, and improving the appearance. The current for the front wire is 800A to 1200A, and the voltage is 28V to 35V. The current for the follow wire is 500A to 800A, and the voltage is 32V to 40V. The welding speed is 30cm / min to 60cm / min.

[0041] Welding speed: Set a moderate walking speed (e.g., up to 40 cm / min), and then fine-tune it according to the actual penetration.

[0042] Wire feed speed: automatically set to match the current. Appropriate suction force is set on the flux recovery device.

[0043] 1g, Enable laser tracker: The laser tracker 11 is activated, and the laser stripes it emits form an image on the bevel. It is understood that the laser tracker 11 is already enabled and in "learning mode" before welding begins. The system captures images via a camera and automatically identifies the precise trajectory and height of the weld. At this time, the tracker is in "learning" or "teaching" mode. The laser tracker provides real-time feedback on the weld position information, and the control system automatically corrects the lateral and vertical positions of the welding torch using a PID algorithm, with a correction frequency of no less than 10Hz.

[0044] Phase Two: Welding Execution 2a. Start welding: The operator presses the start button on the control panel.

[0045] Flux delivery: The valve below the flux hopper 7 is opened, and the flux is evenly piled on the bevel in front of the welding torch through the delivery pipe and flux spreading joint 12, reaching the predetermined pile height.

[0046] Arc ignition: The welding machine outputs current, and the two welding wires automatically ignite the arc after short-circuiting when they come into contact with the workpiece under the flux layer.

[0047] Movement begins: Driven by the manipulator, the entire welding head begins to move at a constant speed along the weld seam trajectory.

[0048] Normal welding and real-time tracking: The two wires work together: the high current of the front wire forms deep penetration, ensuring root penetration; the arc of the rear wire heats and stirs the molten pool formed by the front wire, improving weld formation and metallurgical properties.

[0049] 2b. Real-time laser tracking: The laser tracker 11 continuously scans the weld seam throughout the welding process and feeds the data back to the control system in real time. The control system processes the data through algorithms. If it detects that the welding torch is deviating from the center of the bevel, it will issue a command to finely adjust the lateral (X-axis) or height (Z-axis) position of the welding head to achieve dynamic correction and ensure that the welding trajectory is absolutely accurate.

[0050] 2c. Synchronous Start of Flux Recovery: The cylinder 4 actuates, pushing the slider 15 and the connected recovery nozzle 1 down to the working position, close to the workpiece surface. That is, the recovery nozzle 1 moves close to the workpiece surface under the drive of the cylinder 4, ensuring the synchronicity and thoroughness of flux recovery. The recovery pump starts and begins to continuously suck up unmelted flux.

[0051] Molten pool and slag formation: Under the flux layer, the electric arc burns intensely, the metal melts to form a molten pool, and the flux partially melts to form liquid slag that covers the molten pool, protecting the molten pool metal from air pollution.

[0052] Weld observation: The operator makes a preliminary judgment on whether the welding process is stable by using a monitor (if available) or by observing the shape and color of the slag.

[0053] Phase 3: Post-welding cleanup, arc extinguishing and stopping: 3a. When the welding reaches the end point, press the stop button. The wire feed speed will first automatically decrease and then stop, extinguishing the arc. The welding head will move for a short delay before stopping to ensure the arc termination point is filled. Flux delivery will stop.

[0054] The recovery nozzle 1 is lifted back to its original position under the drive of the cylinder, and the flux recovery stops after a few seconds to ensure that the last bit of flux is sucked up.

[0055] 3b. Slag Removal and Inspection: After welding, the molten slag will cool and solidify into a hard shell. Use a slag hammer to knock off this slag shell.

[0056] The weld metal is bright, uniform, and has a fish-scale pattern.

[0057] Perform a preliminary visual inspection: check whether the weld has surface defects such as undercut, porosity, and weld beads.

[0058] Next preparation: If the plate is thick and requires multiple layers of welding, the spatter and impurities on the weld surface must be cleaned with a wire brush or angle grinder.

[0059] Adjust the crosshair trimmer of the welding torch to raise it to the height required for the next weld, and may fine-tune its lateral position to cover the entire bevel width.

[0060] Repeat steps 1d through 2c until the entire bevel is filled.

[0061] Phase Four: Final Inspection 4a. Non-destructive testing: After all welding passes are completed, wait for the weld to cool to room temperature.

[0062] According to process requirements, ultrasonic testing (UT) or radiographic testing (RT) is performed on the weld to check for defects such as porosity, slag inclusions, lack of fusion, and incomplete penetration, ensuring that the weld quality meets the highest standards of the classification society.

[0063] The cross adjustment of the welding torch clamping mechanism in this application adopts a self-made lead screw with self-locking, which can maintain the stability of the welding torch during welding. The wire feeder angle is adjustable, which can adjust the smoothness of wire feeding and make the welding more stable.

[0064] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A panel-moving dual-wire submerged arc welding machine, characterized in that: The frame (8) includes a flux hopper (7), a wire feeder mounting frame (6), and a mounting frame (9) installed from top to bottom. Two sets of wire feeders (5) are installed on the wire feeder mounting frame (6). The wire feeders (5) are angle-adjustable to adjust the angle of the welding wire feeding. Two welding guns are installed on the mounting frame (9), and a flux spreading connector (12) is fixed on one of the welding guns. The feed end of the flux spreading connector (12) is sealed to the discharge end of the flux hopper (7) through a conveying pipe. The position and angle of the welding gun can be adjusted. A recovery nozzle (1) is installed on the mounting bracket (9), the recovery nozzle (1) being driven by a drive component to recover excess flux; A laser tracker (11) is installed on the frame (8) to detect the weld trajectory in real time and feed it back to the control system to realize dynamic correction of the welding gun position.

2. The panel-moving dual-wire submerged arc welding machine as described in claim 1, characterized in that: The wire feeder mounting frame (6) is provided with a waist-shaped adjustment groove. The base of the wire feeder (5) is locked to the waist-shaped adjustment groove by bolts, so that the angle of the wire feeder can be adjusted within the range of 0° to 30°.

3. The panel-moving dual-wire submerged arc welding machine as described in claim 1, characterized in that: The mounting bracket (9) is equipped with a cross-shaped fine adjustment component to adjust the position of the welding torch in the horizontal and vertical directions; The cross-shaped fine adjustment assembly includes a first fine adjustment seat (17) and a second fine adjustment seat (22) arranged perpendicularly to each other. The first fine adjustment seat (17) is fixed to the lower inner side of the mounting bracket (9). The screw nut fixed on the second fine adjustment seat (22) is threadedly engaged with the first screw installed on the first fine adjustment seat (17). A first tightening screw is installed on the first fine adjustment seat (17) to tighten the first screw. The second lead screw is installed on the second fine adjustment seat (22), the nut of the fixed shaft seat (18) is threadedly engaged with the second lead screw, and the second tightening screw is installed on the second fine adjustment seat (22) to tighten the second lead screw; A fixed shaft (19) is installed on a fixed shaft seat (18). A first clamping block (20) is fixed to the fixed shaft (19) by screws. A second clamping block (21) is fixedly connected to the first clamping block (20). A conductive rod (10) is fixed between the first clamping block (20) and the second clamping block (21). The welding wire led out by the wire feeder (5) passes through the conductive rod (10).

4. The panel-moving dual-wire submerged arc welding machine as described in claim 1, characterized in that: The driving component includes a cylinder (4), a linear guide rail (16), a slider (15), a connecting seat (3), a locking handle (2), a first clamp (13), and a second clamp (14). The linear guide rail (16) is installed on the side of the mounting frame (9), the cylinder (4) is installed on the top of the mounting frame (9), the slider (15) is slidably disposed on the linear guide rail (16), and the piston rod end of the cylinder (4) is fixedly connected to the slider (15). The second clamp (14) is installed on the connecting seat (3), and the first clamp (13) and the second clamp (14) are locked by the locking handle (2) to fix the recycling nozzle (1).

5. The panel-moving dual-wire submerged arc welding machine as described in claim 1, characterized in that: The laser tracker (11) can adjust its position in the vertical and horizontal directions and provide real-time feedback of weld position information to the control system. The control system dynamically adjusts the horizontal and vertical positions of the welding torch based on the feedback information.

6. A welding method for a panel-moving dual-wire submerged arc welding machine, characterized in that, Using a panel-moving dual-wire submerged arc welding machine according to any one of claims 1-5, the welding method includes the following steps: Phase 1: Pre-welding preparation (1a) Beveling preparation: The edges of the thick plate to be welded are machined into X-shaped or V-shaped bevels and cleaned; (1b) Assembly and tack welding: Align the steel plates and leave welding gaps, and fix them with tack welding; (1c) Welding machine positioning and adjustment: Move the welding head to the beginning of the weld and connect the power and gas supply; (1d) Welding torch centering and fine adjustment: Finely adjust the position of the welding torch in the horizontal and vertical directions using the cross-shaped fine adjustment component to ensure that the welding wire is aligned with the center of the bevel; adjust the angle of the wire feeder and lock it; (1e) Auxiliary component adjustment: Adjust the position and height of the flux spreading joint (12) and the recovery nozzle (1); (1f) Parameter settings: Set the current, voltage and welding speed of the front wire and the rear wire in the control system; the front wire adopts DC reverse connection and the rear wire adopts AC or DC positive connection; The front wire current is set to 800A to 1200A, and the voltage is set to 28V to 35V; the rear wire current is set to 500A to 800A, and the voltage is set to 32V to 40V; the welding speed is set to 30 cm / min to 60 cm / min. (1g) Enable laser tracker: Activate laser tracker (11) to enable it to identify and learn the precise trajectory of the weld; Phase Two: Welding Execution (2a) Start welding: Simultaneously activate flux spreading, dual arc ignition, welding machine movement and flux recovery functions; (2b) Real-time tracking and dynamic correction: The weld trajectory is detected in real time by the laser tracker (11) and the data is fed back to the control system. The control system dynamically adjusts the horizontal and vertical position of the welding gun through the PID algorithm, and the correction frequency is not less than 10Hz. (2c) Flux recovery: The recovery nozzle (1) moves close to the workpiece surface under the drive of the cylinder (4) to recover unmelted flux simultaneously; Phase 3: Post-welding finishing (3a) Stop operation: When welding reaches the end point, stop wire feeding, movement and flux recovery in sequence; (3b) Slag removal and inspection: Remove the slag crust from the weld surface and perform a visual inspection; Phase Four: Final Inspection (4a) Non-destructive testing: Ultrasonic testing or radiographic testing is performed on the cooled weld to inspect its internal quality.

7. The welding method of the panel-moving dual-wire submerged arc welding machine as described in claim 6, characterized in that, In step (1a), the bevel has a blunt edge and a gap.

8. The welding method of the panel-moving dual-wire submerged arc welding machine as described in claim 6, characterized in that, In step (1b), the spot welding is performed by manual welding or carbon dioxide gas shielded welding.

9. The welding method of the panel-moving dual-wire submerged arc welding machine as described in claim 6, characterized in that, In step (1d), the angle adjustment range of the wire feeder (5) is 0° to 30°.

10. The welding method of the panel-moving dual-wire submerged arc welding machine as described in claim 6, characterized in that, If the thick plate requires multiple passes and layers of welding, the spatter and impurities on the weld surface must be cleaned with a wire brush or angle grinder; adjust the cross-shaped fine adjustment component of the welding torch to raise the welding torch to the height required for the next weld, and finely adjust its lateral position to cover the entire bevel width. Repeat steps 1d through 2c until the entire bevel is filled; after all welding passes are completed, wait for the weld to cool to room temperature; according to process requirements, perform ultrasonic or radiographic testing on the weld to ensure that the weld quality meets the requirements.

Images