Metal product machining welding mechanism and welding method

Abstract

The invention discloses a metal product machining welding mechanism and a welding method, and relates to the field of welding, the metal product machining welding mechanism comprises a mounting vertical plate, a supporting frame and a foot supporting rod, the supporting frame is fixedly mounted on one side of the mounting vertical plate, and the foot supporting rod is fixedly mounted at the lower end of the mounting vertical plate. According to the metal product machining welding mechanism and welding method, the rotatable welding platform and the welding head capable of moving linearly are designed in the mechanism, the height of the platform is adjusted through the adjusting screw rod, a workpiece can rotate, a welding gun can move linearly or curvilinearly, the workpiece and the welding gun can be linked through a digital system, and the working efficiency is improved. Therefore, welding of an annular welding seam, a spiral welding seam and a complex space curve welding seam can be easily completed, accurate control over welding heat input is achieved, the welding track accuracy of the whole process from arc starting to arc stopping is guaranteed through a self-adaptive compensation mechanism, and fine control over each welding seam is achieved.

Description

Technical Field

[0001] This invention relates to the field of welding, and in particular to a welding mechanism and welding method for metal product processing. Background Technology

[0002] Metal product processing and welding equipment is a set of equipment used for welding metal products. Metal welding, as a basic manufacturing process, is widely used in machinery, construction, shipbuilding, pressure vessels and other fields.

[0003] However, in the use of metal product processing welding mechanisms, the workpiece positioning and adjustment and the welding torch motion control are relatively independent in many welding mechanisms, with poor coordination and difficulty in generating complex synthetic motion trajectories. For non-standard or three-dimensional welds, expensive multi-joint robots are often relied upon, or multiple manual adjustments and clamping are required, resulting in complex programming, poor adaptability, and low efficiency. At the same time, traditional automatic welding is mostly based on preset fixed parameters, lacking real-time perception and feedback adjustment of key states in the welding process. Inaccurate control of welding heat input can easily lead to uneven weld penetration, poor weld bead formation, and defects such as porosity, lack of fusion, and undercut, especially in long welds or welding of heat-sensitive materials, where quality fluctuations are large. Furthermore, workpiece thermal deformation, assembly gap fluctuations, and initial alignment errors during the welding process can cause deviations between the preset welding path and the actual weld. Most existing equipment lacks online, adaptive path compensation capabilities, often resulting in weld misalignment, which seriously affects the straightness, alignment, and final structural strength of the weld. For applications requiring high precision, intervention by the welder's experience is still necessary. Summary of the Invention

[0004] The main objective of this invention is to provide a welding mechanism and welding method for metal product processing, which can effectively solve the technical problems raised in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A metal product processing welding mechanism includes a mounting plate, a support frame, and a support rod. The support frame is fixedly installed on one side of the mounting plate, and the support rod is fixedly installed on the lower end of the mounting plate. A welding plate is fixedly installed on one side of the mounting plate above the support frame. A platform structure is movably installed at the center of the welding plate. A motor mounting plate is fixedly installed on the other side of the mounting plate. A drive motor is fixedly installed on the upper end of the motor mounting plate. A drive pulley is fixedly installed on the lower end of the drive motor shaft. A transmission belt is provided between the drive pulley and the transmission belt. A guide rail is fixedly installed on one side of the mounting plate above the welding plate. A sliding mounting plate is movably installed on the outer side of the guide rail. A welding head is fixedly installed on the upper end of the sliding mounting plate.

[0007] Preferably, the platform structure includes a rotary disk, a driven pulley, an adjusting screw, an adjusting handle, a lifting connecting frame, and a welding platform. The rotary disk is movably mounted on the upper end of the welding plate, the driven pulley is fixedly mounted on the lower end of the rotary disk, the adjusting screw is threadedly mounted on the center of the rotary disk, the adjusting handle is fixedly mounted on the lower end of the adjusting screw, the lifting connecting frame is fixedly mounted on the upper end of the rotary disk, and the welding platform is fixedly mounted on the upper end of the lifting connecting frame.

[0008] Preferably, the driven pulley passes through the welding plate and is movably connected to it, the upper end of the adjusting screw is movably connected to the lower end of the welding platform, the lower end of the adjusting screw passes through the interior of the driven pulley, and the adjusting handle is located below the driven pulley.

[0009] Preferably, the drive belt passes through the mounting plate and is movably mounted outside the drive pulley and driven pulley.

[0010] Preferably, the welding head faces upwards from the welding platform and slides around the guide rail via a sliding mounting plate.

[0011] A welding method for a metal product processing welding mechanism, the process specifically includes the following steps:

[0012] Step 1: Workpiece clamping and three-dimensional positioning. Fix the metal workpiece to be welded on the welding platform. Drive the adjusting screw by rotating the adjusting handle to make the welding platform and the workpiece rise and fall vertically under the guidance of the lifting connecting frame. Initially set the welding starting height. At the same time, the drive motor can be started to drive the rotating disk and welding platform to rotate through the belt transmission system to achieve the pre-positioning of the circumferential angle of the workpiece.

[0013] Step 2: Intelligent setting and preheating of welding parameters. Based on the workpiece material, thickness and target weld type, the basic parameters of welding current, voltage and welding speed, as well as the target welding temperature range and expected weld thickness are preset in the welding control system. The preheating function of the welding head is activated to preheat the welding torch and to preheat the workpiece area to be welded in a non-melting manner so that it reaches the preset starting temperature to reduce thermal stress and deformation.

[0014] Step 3: Visual-assisted alignment and path planning. A high-definition vision sensor integrated near the sliding mounting plate or guide rail scans the weld position of the workpiece and feeds the data back to the control system. The control system plans the optimal path for the welding head to slide along the guide rail and generates a high-precision welding path program containing three-dimensional coordinates to ensure the precise alignment of the welding trajectory and the weld.

[0015] Step 4: Dynamic collaborative welding execution. Start the welding program and the welding head begins to work. The drive motor drives the welding platform and workpiece to rotate precisely according to the preset program or real-time instructions through the transmission belt. At the same time, the welding head generates an electric arc under the drive of the welding power supply and moves in a straight line or curve interpolation along the guide rail (16). During this process, the temperature of the molten pool is monitored in real time by an infrared thermometer and the data is fed back to the control system to dynamically fine-tune the welding current or welding speed so that the temperature of the molten pool is stabilized within the target range, so as to control the penetration depth and weld bead formation and ensure the uniformity of the welding thickness.

[0016] Step 5: Online monitoring and adaptive compensation. During the welding process, the molten pool shape, weld width and weld bead accumulation height are continuously monitored using a vision sensor. When the actual weld bead thickness deviates from the preset range, or the weld tracking accuracy deviates due to factors such as thermal deformation, the control system calculates the compensation amount in real time and adjusts the position of the welding head on the guide rail, the rotation speed of the welding platform and the welding parameters simultaneously to achieve adaptive closed-loop control of thickness and accuracy.

[0017] Step Six: Post-weld treatment and quality assessment. After a single weld is completed, the weld joint can be closed and filled with filler. If multiple layers and multiple passes are required, repeat steps two to five. In step one, adjust the height or angle of the welding platform to fit the position of the next weld pass. After all welding is completed, use the monitoring equipment on the mechanism to perform a preliminary visual inspection of the weld and record the final weld size accuracy and forming quality.

[0018] Preferably, in steps one and four, the rotational motion of the welding platform and the linear motion of the welding head are digitally linked and controlled to form a composite welding trajectory from rotation to translation, which is used to complete the welding of circumferential welds, spiral welds or complex spatial curves, thereby improving the complexity and accuracy of the welding path.

[0019] Preferably, the dynamic collaborative control in step four introduces a "temperature-speed-feed" collaborative algorithm, that is, based on the real-time monitored molten pool temperature, the speed of the drive motor and the feed speed of the welding head along the guide rail are dynamically adjusted, so that when the welding temperature is too high, the relative movement speed is automatically increased to accelerate heat dissipation, and when the temperature is too low, the speed is slowed down to ensure the penetration depth, thereby achieving precise control of welding heat input and uniformity of weld thickness.

[0020] Preferably, the adaptive compensation in step five specifically includes predictive compensation for welding thermal deformation; the control system has a built-in thermal deformation prediction model, which predicts the deformation trend of the workpiece based on the welded length, cumulative heat input and material properties, and performs reverse offset correction on the subsequent path of the welded joint in advance, thereby maintaining the welding trajectory accuracy throughout the process and ensuring the straightness or contour accuracy of the weld.

[0021] Preferably, in steps two and four, when adopting a layered welding strategy for workpieces with different plate thicknesses, the method sets differentiated target temperature ranges and weld thicknesses for each layer of welding; and by adjusting the screw in step one, the height of the welding platform is precisely reduced after each layer is welded, combined with the corresponding adjustment of welding parameters, to achieve controllability of the thick plate welding process and stability of the quality of each layer of weld.

[0022] The beneficial effects that can be achieved by the above embodiments of the present invention include: the mechanism is designed with a rotatable welding platform and a linearly movable welding head, and the height of the platform is adjusted by adjusting the screw, which allows the workpiece to rotate and the welding torch to move in a straight line or curve. The two can also be linked through a digital system, thereby easily completing the welding of circumferential welds, spiral welds and complex spatial curve welds, greatly expanding the applicable scope of the welding process.

[0023] The welding method incorporates real-time monitoring and closed-loop control. The temperature of the molten pool is monitored in real time by an infrared thermometer, and the welding speed and workpiece rotation speed are dynamically adjusted by a "temperature-speed-feed" collaborative algorithm. This achieves precise control of the welding heat input, which effectively stabilizes the welding process, reduces defects such as porosity and lack of fusion, and ensures the uniformity of weld penetration and weld thickness.

[0024] By using visual sensors for initial positioning and weld tracking, and combining a thermal deformation prediction model for real-time path compensation, the system can actively correct trajectory deviations caused by factors such as thermal deformation. The adaptive compensation mechanism ensures the accuracy of the welding trajectory throughout the entire process from arc initiation to arc termination, significantly improving the straightness, contour accuracy, and centering of the weld.

[0025] For thick plate welding, a clear layering strategy was proposed. By setting different temperature and thickness parameters for different weld layers and using adjusting screws to precisely adjust the workpiece height after welding, fine control of each weld was achieved. This not only made the thick plate welding process controllable, but also ensured the quality stability between each weld layer and the overall weld. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a metal product processing and welding mechanism according to the present invention;

[0027] Figure 2 This is a rear view of a metal product processing and welding mechanism according to the present invention.

[0028] Figure 3 This is a cross-sectional view of a metal product processing and welding mechanism according to the present invention;

[0029] Figure 4 This is an enlarged view of the platform structure in a metal product processing and welding mechanism according to the present invention;

[0030] Figure 5 This is a flowchart of a welding method for a metal product processing welding mechanism according to the present invention.

[0031] In the diagram: 1. Mounting plate; 2. Support frame; 3. Foot support rod; 4. Welding plate; 5. Platform structure; 6. Rotary disc; 7. Driven pulley; 8. Adjusting screw; 9. Adjusting handle; 10. Lifting connecting frame; 11. Welding platform; 12. Motor mounting plate; 13. Drive motor; 14. Drive pulley; 15. Transmission belt; 16. Guide rail; 17. Sliding mounting plate; 18. Welding head. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] like Figures 1-4 As shown, a metal product processing welding mechanism includes a mounting plate 1, a support frame 2, and a foot support rod 3. The support frame 2 is fixedly installed on one side of the mounting plate 1, and the foot support rod 3 is fixedly installed on the lower end of the mounting plate 1. A welding plate 4 is fixedly installed on one side of the mounting plate 1 above the support frame 2. A platform structure 5 is movably installed at the center of the welding plate 4. A motor mounting plate 12 is fixedly installed on the other side of the mounting plate 1. A drive motor 13 is fixedly installed on the upper end of the motor mounting plate 12. A drive pulley 14 is fixedly installed on the lower end of the shaft of the drive motor 13. A drive belt 15 is provided between the drive pulley 14 and the drive belt 15. A guide rail 16 is fixedly installed on one side of the mounting plate 1 above the welding plate 4. A sliding mounting plate 17 is movably installed on the outer side of the guide rail 16. A welding head 18 is fixedly installed on the upper end of the sliding mounting plate 17.

[0034] In this embodiment, the platform structure 5 includes a rotating disk 6, a driven pulley 7, an adjusting screw 8, an adjusting handle 9, a lifting connecting frame 10, and a welding platform 11. The rotating disk 6 is movably mounted on the upper end of the welding plate 4, the driven pulley 7 is fixedly mounted on the lower end of the rotating disk 6, the adjusting screw 8 is threaded onto the center of the rotating disk 6, the adjusting handle 9 is fixedly mounted on the lower end of the adjusting screw 8, the lifting connecting frame 10 is fixedly mounted on the upper end of the rotating disk 6, and the welding platform 11 is fixedly mounted on the upper end of the lifting connecting frame 10.

[0035] In this embodiment, the driven pulley 7 passes through the welding plate 4 and is movably connected to it. The upper end of the adjusting screw 8 is movably connected to the lower end of the welding platform 11. The lower end of the adjusting screw 8 passes through the interior of the driven pulley 7. The adjusting handle 9 is located below the driven pulley 7.

[0036] In this embodiment, the transmission belt 15 passes through the mounting plate 1 and is movably mounted outside the drive pulley 14 and the driven pulley 7.

[0037] In this embodiment, the welding head 18 faces upwards from the welding platform 11, and the welding head 18 slides around the guide rail 16 via the sliding mounting plate 17.

[0038] Specifically, the metal product to be welded is placed on the welding platform 11. The welding head 18 is equipped with a welding rod to weld the metal product on the welding platform 11. The operation of the drive motor 13 drives the drive pulley 14 to rotate. The drive pulley 14 drives the driven pulley 7 to rotate through the transmission belt 15, which in turn drives the rotating disk 6 and the welding platform 11 above to rotate, so that the metal product can be continuously welded at different angles and circles. The adjusting screw 8 is rotated by the adjusting handle 9. The adjusting screw 8 is raised and lowered through the threaded connection with the rotating disk 6, thereby pushing the welding platform 11 to move up and down. At the same time, the lifting connecting frame 10 moves up and down to maintain the connection of the welding platform 11 at different heights, so as to realize the welding processing of the metal product at different heights.

[0039] like Figure 5 As shown, a welding method for a metal product processing welding mechanism includes the following steps:

[0040] Step 1: Workpiece clamping and three-dimensional positioning. Fix the metal workpiece to be welded on the welding platform 11. Drive the adjusting screw 8 by rotating the adjusting handle 9, so that the welding platform 11 and the workpiece are vertically raised and lowered under the guidance of the lifting connecting frame 10. Initially set the welding starting height. At the same time, the drive motor 13 can be started to drive the rotating disk 6 and the welding platform 11 to rotate through the belt transmission system, so as to achieve the pre-positioning of the circumferential angle of the workpiece.

[0041] Step 2: Intelligent setting and preheating of welding parameters. Based on the workpiece material, thickness and target weld type, the basic parameters of welding current, voltage and welding speed, as well as the target welding temperature range and expected weld thickness are preset in the welding control system. The preheating function of welding head 18 is activated to preheat the welding gun and perform non-melting preheating on the workpiece area to be welded, so that it reaches the preset starting temperature to reduce thermal stress and deformation.

[0042] Step 3: Visual-assisted alignment and path planning. A high-definition vision sensor integrated near the sliding mounting plate 17 or guide rail 16 scans the weld position of the workpiece and feeds the data back to the control system. The control system plans the optimal path for the welding head 18 to slide along the guide rail 16 and generates a high-precision welding path program containing three-dimensional coordinates to ensure the precise alignment of the welding trajectory and the weld.

[0043] Step 4: Dynamic collaborative welding execution. The welding program is started, and the welding head 18 begins to work. The drive motor 13 drives the welding platform 11 and the workpiece to rotate precisely according to the preset program or real-time instructions via the transmission belt 15. At the same time, the welding head 18 generates an electric arc under the drive of the welding power supply and moves linearly or curvilinearly along the guide rail 16. During this process, the temperature of the molten pool is monitored in real time by an infrared thermometer, and the data is fed back to the control system to dynamically fine-tune the welding current or welding speed to stabilize the temperature of the molten pool within the target range, thereby controlling the penetration depth and weld bead formation and ensuring the uniformity of the weld thickness.

[0044] Step 5: Online monitoring and adaptive compensation. During the welding process, the molten pool shape, weld width and weld bead accumulation height are continuously monitored using a vision sensor. When the actual weld bead thickness deviates from the preset range, or the weld tracking accuracy deviates due to factors such as thermal deformation, the control system calculates the compensation amount in real time and adjusts the position of the welding head 18 on the guide rail 16, the rotation speed of the welding platform and the welding parameters simultaneously to achieve adaptive closed-loop control of thickness and accuracy.

[0045] Step Six: Post-weld treatment and quality assessment. After a single weld is completed, the weld head 18 can be used for arc-closing and crater filling. If multi-layer and multi-pass welding is required, repeat steps two to five. In step one, adjust the height or angle of the welding platform 11 to adapt to the position of the next weld. After all welding is completed, use the monitoring equipment on the mechanism to perform preliminary visual inspection of the weld and record the final weld size accuracy and forming quality.

[0046] In this embodiment, in steps one and four, the rotational motion of the welding platform 11 and the linear motion of the welding head 18 are digitally linked and controlled to form a composite welding trajectory from rotation to translation, which is used to complete the welding of circumferential welds, spiral welds or complex spatial curves, thereby improving the complexity and accuracy of the welding path.

[0047] In this embodiment, the dynamic collaborative control in step four introduces a "temperature-speed-feed" collaborative algorithm. That is, based on the real-time monitored molten pool temperature, the speed of the drive motor 13 (i.e., the workpiece rotation speed) and the feed speed of the welding head 18 along the guide rail 16 are dynamically adjusted. This allows the relative motion speed to be automatically increased to accelerate heat dissipation when the welding temperature is too high, and the speed to be reduced to ensure the penetration depth when the temperature is too low. This achieves precise control of welding heat input and uniformity of weld thickness.

[0048] In this embodiment, the adaptive compensation in step five specifically includes predictive compensation for welding thermal deformation; the control system has a built-in thermal deformation prediction model, which predicts the deformation trend of the workpiece based on the welded length, cumulative heat input and material properties, and performs reverse offset correction on the subsequent path of the welding head 18 in advance, thereby maintaining the welding trajectory accuracy throughout the process and ensuring the straightness or contour accuracy of the weld.

[0049] In this embodiment, in steps two and four, when adopting a layered welding strategy for workpieces with different plate thicknesses, a differentiated target temperature range and weld thickness are set for each layer of welding; and by adjusting the screw 8 in step one, the height of the welding platform 11 is precisely reduced after each layer is welded, and combined with the corresponding adjustment of welding parameters, the controllability of the thick plate welding process and the stability of the weld quality of each layer are achieved.

[0050] In the embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and other division methods may exist in actual implementation. Modules described as separate components may or may not be physically separated, and components shown as modules may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of the method in this embodiment according to actual needs.

[0051] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A metal product processing and welding mechanism, comprising a mounting plate (1), a support frame (2), and a foot support rod (3), wherein the support frame (2) is fixedly installed on one side of the mounting plate (1), and the foot support rod (3) is fixedly installed on the lower end of the mounting plate (1), characterized in that: A welding plate (4) is fixedly installed on one side of the mounting plate (1) above the support frame (2). A platform structure (5) is movably installed in the center of the welding plate (4). A motor mounting plate (12) is fixedly installed on the other side of the mounting plate (1). A drive motor (13) is fixedly installed on the upper end of the motor mounting plate (12). A drive pulley (14) is fixedly installed on the lower end of the shaft of the drive motor (13). A transmission belt (15) is provided between the drive pulley (14) and the transmission belt (15). A guide rail (16) is fixedly installed on one side of the mounting plate (1) above the welding plate (4). A sliding mounting plate (17) is movably installed on the outer side of the guide rail (16). A welding head (18) is fixedly installed on the upper end of the sliding mounting plate (17).

2. The metal product processing and welding mechanism according to claim 1, characterized in that: The platform structure (5) includes a rotating disk (6), a driven pulley (7), an adjusting screw (8), an adjusting handle (9), a lifting connecting frame (10), and a welding platform (11). The rotating disk (6) is movably installed on the upper end of the welding plate (4), the driven pulley (7) is fixedly installed on the lower end of the rotating disk (6), the adjusting screw (8) is threaded on the center of the rotating disk (6), the adjusting handle (9) is fixedly installed on the lower end of the adjusting screw (8), the lifting connecting frame (10) is fixedly installed on the upper end of the rotating disk (6), and the welding platform (11) is fixedly installed on the upper end of the lifting connecting frame (10).

3. The metal product processing and welding mechanism according to claim 2, characterized in that: The driven pulley (7) passes through the welding plate (4) and is movably connected to it. The upper end of the adjusting screw (8) is movably connected to the lower end of the welding platform (11). The lower end of the adjusting screw (8) passes through the interior of the driven pulley (7). The adjusting handle (9) is located below the driven pulley (7).

4. The metal product processing and welding mechanism according to claim 2, characterized in that: The drive belt (15) passes through the mounting plate (1) and is movably mounted on the outside of the drive pulley (14) and the driven pulley (7).

5. A metal product processing and welding mechanism according to claim 2, characterized in that: The welding head (18) faces upwards from the welding platform (11), and the welding head (18) slides around the guide rail (16) via the sliding mounting plate (17).

6. A welding method for a metal product processing welding mechanism according to any one of claims 1-5, characterized in that, The process specifically includes the following steps: Step 1: Workpiece clamping and three-dimensional positioning. Fix the metal workpiece to be welded on the welding platform (11). Drive the adjusting screw (8) by rotating the adjusting handle (9) so that the welding platform (11) and the workpiece can be vertically raised and lowered under the guidance of the lifting connecting frame (10). Initially set the welding starting height. At the same time, the drive motor (13) can be started to drive the rotating disk (6) and the welding platform (11) to rotate through the belt transmission system to achieve the pre-positioning of the circumferential angle of the workpiece. Step 2: Intelligent setting and preheating of welding parameters. Based on the workpiece material, thickness and target weld type, the basic parameters of welding current, voltage and welding speed, as well as the target welding temperature range and expected weld thickness are preset in the welding control system. The preheating function of the welding head (18) is activated to preheat the welding gun and to preheat the workpiece area to be welded in a non-melting manner so that it reaches the preset starting temperature to reduce thermal stress and deformation. Step 3: Visual-assisted alignment and path planning. A high-definition vision sensor integrated near the sliding mounting plate (17) or guide rail (16) scans the position of the workpiece weld and feeds the data back to the control system. The control system plans the optimal path for the welding head (18) to slide along the guide rail (16) and generates a high-precision welding path program containing three-dimensional coordinates to ensure the accurate alignment of the welding trajectory and the weld. Step 4: Dynamic collaborative welding execution. The welding program is started, and the welding head (18) begins to work. The drive motor (13) drives the welding platform (11) and the workpiece to rotate precisely according to the preset program or real-time instructions via the transmission belt (15). At the same time, the welding head (18) generates an electric arc under the drive of the welding power supply and moves in a straight line or curve interpolation along the guide rail (16). During this process, the temperature of the molten pool is monitored in real time by an infrared thermometer, and the data is fed back to the control system to dynamically fine-tune the welding current or welding speed so that the temperature of the molten pool is stabilized within the target range, so as to control the penetration depth and weld bead formation and ensure the uniformity of the welding thickness. Step 5: Online monitoring and adaptive compensation. During the welding process, the molten pool shape, weld width and weld bead accumulation height are continuously monitored using a visual sensor. When the actual weld bead thickness detected deviates from the preset range, or the weld tracking accuracy deviates due to factors such as thermal deformation, the control system calculates the compensation amount in real time and adjusts the position of the welding head (18) on the guide rail (16), the rotation speed of the welding platform and the welding parameters in sync, so as to achieve adaptive closed-loop control of thickness and accuracy. Step 6: Post-weld treatment and quality assessment. After a single weld is completed, the weld head (18) can perform arc-closing and crater-filling operations. If multi-layer and multi-pass welding is required, repeat steps 2 to 5. In step 1, adjust the height or angle of the welding platform (11) to match the position of the next weld. After all welding is completed, use the monitoring equipment on the mechanism to perform preliminary visual inspection of the weld and record the final weld size accuracy and forming quality.

7. The welding method for a metal product processing welding mechanism according to claim 6, characterized in that: In steps one and four, the rotational motion of the welding platform (11) and the linear motion of the welding head (18) are digitally linked and controlled to form a composite welding trajectory from rotation to translation, which is used to complete the welding of circumferential welds, spiral welds or complex spatial curves, thereby improving the complexity and accuracy of the welding path.

8. The welding method for a metal product processing welding mechanism according to claim 4, characterized in that: The dynamic collaborative control in step four introduces a "temperature-speed-feed" collaborative algorithm, which dynamically adjusts the speed of the drive motor (13) and the feed speed of the welding head (18) along the guide rail (16) based on the real-time monitored molten pool temperature. This allows the relative motion speed to be automatically increased to accelerate heat dissipation when the welding temperature is too high, and the speed to be reduced to ensure the penetration depth when the temperature is too low, thereby achieving precise control of welding heat input and uniformity of weld thickness.

9. The welding method of a metal product processing welding mechanism according to claim 6, characterized in that: The adaptive compensation in step five specifically includes the prediction compensation for welding thermal deformation; the control system has a built-in thermal deformation prediction model, which predicts the deformation trend of the workpiece based on the welded length, cumulative heat input and material properties, and performs reverse offset correction on the subsequent path of the welded head (18) in advance, so as to maintain the accuracy of the welding trajectory throughout the process and ensure the straightness or contour accuracy of the weld.

10. The welding method of a metal product processing welding mechanism according to claim 6, characterized in that: In steps two and four, when adopting a layered welding strategy for workpieces with different plate thicknesses, the method sets a different target temperature range and weld thickness for each layer of welding; and by adjusting the screw (8) in step one, the height of the welding platform (11) is precisely reduced after each layer is welded, and combined with the corresponding adjustment of welding parameters, the controllability of the thick plate welding process and the stability of the weld quality of each layer are achieved.

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