A metal workpiece double-sided welding device capable of root pass omission and a welding method thereof

Abstract

The present application relates to the technical field of metal workpiece welding equipment, and provides a metal workpiece double-sided welding equipment capable of avoiding root cleaning and a welding method thereof, which comprises a variable-position tooling platform, one side of the variable-position tooling platform is provided with a first full-mechanical welding robot, the other side of the variable-position tooling platform is provided with a second full-mechanical welding robot, the top of the variable-position tooling platform is installed with a positioning baffle, the top of the variable-position tooling platform is provided with a workpiece main body, and the inner wall of the variable-position tooling platform is fixedly connected with a guide rail. By pasting the workpiece main body on one side to the positioning baffle, pulling the guide sliding block to make it slide along the guide rail, rotating the threaded block, the threaded block can extrude the arc-shaped positioning plate, under the action of the rotating shaft, the arc-shaped positioning plate is driven to rotate along the guide sliding block, and the plurality of rubber anti-skid blocks on the outer wall of the arc-shaped positioning plate extrude the workpiece main body, so that the effect of conveniently clamping and positioning the workpiece main body with different shapes and sizes is achieved.

Description

Technical Field

[0001] This invention relates to the field of metal workpiece welding equipment technology, and in particular to a double-sided welding equipment and welding method for metal workpieces that can eliminate the need for root cleaning. Background Technology

[0002] In the field of metal structural component manufacturing, welding equipment manufacturing technology, as a core process support, has been widely used in the welding of thick plates and complex components in industries such as pressure vessels, pipelines, ships, engineering machinery, and new energy equipment. Plasma arc welding, with its high energy density, good arc stability, and strong penetration ability, has become a key heat source for achieving high-quality weld formation, especially in double-sided welding conditions such as butt joints and fillet joints of medium and thick plates, which can effectively improve welding efficiency and joint strength. To this end, patent CN116618919B discloses a welding device for metal product processing, including an electric motor. The output end of the electric motor is fixedly connected to a positioning device, which includes a grooved shell. A transmission shaft is rotatably connected to the inner wall of the grooved shell. A transmission chain is sleeved on the outer surface of the transmission shaft. A toothed chain gear shaft is sleeved on the inner wall of the transmission chain. A toothed chain plate is meshed with the outer surface of the toothed chain gear shaft. A threaded rod is fixedly connected to the end of the toothed chain plate away from the toothed chain gear shaft. A four-corner rotating block is fixedly connected to the end of the threaded rod away from the toothed chain plate. When the electric motor is turned on, the transmission shaft is rotated, which in turn drives the toothed chain gear shaft to rotate through the transmission chain. This allows for left and right translation inside the grooved shell, thereby changing the position for metal processing and welding, thus achieving position adjustment. After welding, the four-corner rotating blocks are rotated back, causing the toothed chain plate to disengage from the meshing limit of the toothed chain gear shaft, thereby correcting the welding position again. The existing technical solutions mentioned above have the following drawbacks: when used, they cannot stably clamp and position metal workpieces of different shapes and sizes, which makes the workpieces prone to displacement, skewness or vibration during double-sided synchronous welding, seriously damaging the stability of the welding arc and the quality of the weld pool formation, and thus directly affecting the effect of the root-cleaning process. Summary of the Invention

[0003] The purpose of this invention is to provide a double-sided welding device and welding method for metal workpieces that can be welded without cleaning the root, so as to solve the defect of existing double-sided welding devices for metal workpieces that cannot stably clamp and position metal workpieces of different shapes and sizes.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-sided welding device for metal workpieces that can be welded without root cleaning, including a displacement tooling platform; A first fully mechanized welding robot is installed on one side of the positioner tooling platform, and a second fully mechanized welding robot is installed on the other side of the positioner tooling platform. A positioning baffle is installed on the top of the positioner tooling platform, and a workpiece body is installed on the top of the positioner tooling platform. The inner wall of the positioning tooling platform is fixedly connected to a guide rail, and the outer wall of the guide rail is movably connected to a positioning mechanism. The positioning mechanism includes a guide slider movably mounted on the outer wall of the guide rail, a rotating shaft mounted on the outer wall of the guide slider, an clearance groove formed inside the rotating shaft, a receiving frame movably connected to the outer wall of the rotating shaft, a retaining ring fixedly connected to the inner wall of the receiving frame, an arc-shaped positioning plate fixedly connected to the outer wall of the receiving frame, a through groove formed inside the arc-shaped positioning plate, a rubber anti-slip block fixedly connected to the outer wall of the arc-shaped positioning plate, a threaded column fixedly connected to the top of the guide slider, a threaded block movably connected to the outer wall of the threaded column, and a threaded groove formed inside the threaded block.

[0005] Preferably, the guide rail has a slotted design, the guide slider and the guide rail form a sliding structure, the receiving frame and the guide slider form a rotating structure through a rotating shaft, and the retaining ring is located in the clearance groove.

[0006] Preferably, a torsion spring is fitted onto the outer wall of the rotating shaft, and the arc-shaped positioning plate is movably connected to the threaded column through a through groove.

[0007] Preferably, the threaded column is threadedly connected to the threaded block through a threaded groove, and the rubber anti-slip block is evenly distributed on the outer wall of the arc-shaped positioning plate.

[0008] Preferably, a transmission roller is movably connected to the inner wall of the arc-shaped positioning plate, a support rod is movably connected inside the transmission roller, an L-shaped bracket is fixedly connected to one end of the support rod, a guide plate is fixedly connected to the bottom of the L-shaped bracket, a guide groove is formed inside the guide plate, a movable rod is movably connected inside the guide groove, a movable block is fixedly connected to one end of the movable rod, an anti-slip pad is fixedly connected to one side of the movable block, a support column is movably connected inside the guide plate, a return spring is sleeved on the outer wall of the support column, and a guide side plate is fixedly connected to the top of the guide slider.

[0009] Preferably, the transmission roller and the support rod form a rotating structure, the guide plate and the support column form a sliding structure, the guide plate and the guide side plate form a sliding structure, and the guide side plate is symmetrically arranged about the central axis of the guide plate.

[0010] Preferably, the guide plate forms a sliding structure with the movable rod through the guide groove, the guide slider has a slotted design, the movable block and the guide slider form a sliding structure, and the movable rod and the guide slider form a sliding structure.

[0011] Preferably, a receiving rod is fixedly connected to the outer wall of the guide plate, a piston is fixedly connected to one end of the receiving rod, an air cylinder is movably connected to the outer wall of the piston, an air guide pipe is fixedly connected to the outer wall of the air cylinder, and an adsorption hole is opened inside the guide slider.

[0012] Preferably, the piston and the air cylinder form a sliding structure, and the receiving rod and the air cylinder form a sliding structure.

[0013] A welding method using the welding equipment as described in any one of claims 1-9, comprising the following steps: S1. By placing the workpiece body on the displacement tooling platform and making one side of it contact with the positioning baffle, pull the guide slider to slide along the guide rail, drive the arc positioning plate to move above the workpiece body, rotate the threaded block to squeeze the arc positioning plate, drive the arc positioning plate to rotate along the guide slider, so that multiple rubber anti-slip blocks on the outer wall of the arc positioning plate squeeze the workpiece body, and position the workpiece body. S2. As the arc-shaped positioning plate flips and squeezes the transmission roller, the transmission roller rotates along the support rod and drives the guide plate at the bottom of the L-shaped bracket to slide down along the guide side plate, so that the movable rod slides along the guide groove, and the movable block fixedly connected to one end of the movable rod slides along the guide slider, so that the anti-slip pad extends out and squeezes the inner wall of the guide rail, and the guide slider is further positioned. S3. As the guide plate moves down, the piston fixedly connected to one end of the receiving rod slides along the air cylinder, generating negative pressure. This causes the air between the guide slider and the guide rail to be drawn into the air pipe through the adsorption hole, thus positioning the guide slider and preventing the arc-shaped positioning plate from shifting after clamping and positioning. S4. By activating the second fully mechanized welding robot, the workpiece body is welded to form a base layer. Subsequently, the first fully mechanized welding robot begins full penetration welding at certain intervals to ensure that there are no defects inside the weld.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This double-sided welding equipment for metal workpieces that eliminates the need for root cleaning, during use, involves rotating a threaded block to press against an arc-shaped positioning plate, causing the arc-shaped positioning plate to rotate along a guide slider. This causes multiple rubber anti-slip pads on the outer wall of the arc-shaped positioning plate to press against the workpiece body. With the cooperation of the guide plate and the movable rod, the anti-slip pads extend and press against the inner wall of the guide rail. Combined with the suction holes, the air between the guide slider and the guide rail is suctioned, preventing the guide slider from shifting or loosening. This facilitates the clamping and positioning of workpieces of different shapes and sizes, improving the stability during welding positioning. The specific method is as follows: By setting up a guide rail, positioning mechanism, positioning baffle and workpiece body, by attaching one side of the workpiece body to the positioning baffle, pulling the guide slider to slide along the guide rail, and rotating the threaded block, the threaded block can squeeze the arc-shaped positioning plate. Under the action of the rotating shaft, the arc-shaped positioning plate is driven to rotate along the guide slider, so that multiple rubber anti-slip blocks on the outer wall of the arc-shaped positioning plate squeeze the workpiece body, which can facilitate the clamping and positioning of workpiece bodies of different shapes and sizes, prevent the workpiece body from shifting during welding processing, and improve the stability and quality of welding processing. Furthermore, under the action of the torsion spring, an upward reaction force can be applied to the arc-shaped positioning plate when it is pressed down, so that the thread groove in the threaded block and the threaded column are tightly pressed together on one side, eliminating the fit gap between the threads, preventing the threaded block from loosening due to vibration during welding, and further improving the stability of positioning the workpiece body. Furthermore, as the arc-shaped positioning plate flips and presses the transmission roller, the transmission roller rotates along the support rod and drives the guide plate to slide down along the guide side plate. This causes the movable rod to slide along the guide groove, and the movable block fixedly connected to one end of the movable rod to slide along the guide slider. This causes the anti-slip pad to extend and press against the inner wall of the guide rail, positioning the guide slider. This prevents the arc-shaped positioning plate from sliding along the direction of the guide rail when it presses down and limits the workpiece body, further improving the stability of limiting the workpiece body and thus improving the quality of welding. Furthermore, as the guide plate moves downward, the piston, which is fixedly connected to one end of the receiving rod, slides downward along the air cylinder, causing the air between the guide slider and the guide rail to be drawn into the air pipe through the adsorption hole, thereby further positioning the guide slider and improving the stability of the arc-shaped positioning plate in positioning the workpiece body. By employing a first and a second fully mechanized welding robot, and through their combined operation for double-sided welding, the root cleaning process is completely eliminated. Carbon arc gouging and grinding are unnecessary, reducing dust pollution, lowering environmental treatment costs, saving time, and improving labor efficiency. The weld quality is more stable and reliable compared to manual welding. Due to the symmetrical welding on both sides, workpiece deformation can be effectively controlled after welding, eliminating the need for heat treatment steps. Compared to manual welding, the weld appearance is more stable, the weld formation is better, and the weld reinforcement can be controlled. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a bottom-view structural diagram of the present invention; Figure 3 This is a front view structural diagram of the present invention; Figure 4This is a three-dimensional structural diagram of the displacement tooling platform of the present invention; Figure 5 This is a three-dimensional structural diagram of the positioning baffle of the present invention; Figure 6 This is a front view schematic diagram of the positioning mechanism of the present invention; Figure 7 This is a three-dimensional structural diagram of the guide slider of the present invention; Figure 8 This is a schematic diagram of the three-dimensional disassembled structure of the positioning mechanism of the present invention; Figure 9 This is a three-dimensional cross-sectional view of the guide slider structure of the present invention; Figure 10 This is a three-dimensional cross-sectional view of the air cylinder structure of the present invention; Figure 11 This is a three-dimensional structural diagram of the guide plate of the present invention.

[0016] The reference numerals in the diagram are as follows: 1. Positioning fixture platform; 2. First fully mechanized welding robot; 3. Second fully mechanized welding robot; 4. Guide rail; 5. Positioning mechanism; 51. Guide slider; 52. Rotary shaft; 521. Clearance groove; 522. Receiving frame; 523. Snap ring; 53. Torsion spring; 54. Arc-shaped positioning plate; 541. Transmission roller; 542. Support rod; 543. L-shaped bracket; 544. Guide plate; 54 41. Receiving rod; 5442. Piston; 5443. Air cylinder; 5444. Air guide pipe; 5445. Adsorption hole; 545. Guide groove; 546. Movable rod; 547. Movable block; 548. Anti-slip pad; 549. Support column; 5491. Return spring; 55. Through groove; 56. Rubber anti-slip block; 57. Threaded column; 58. Threaded block; 59. Threaded groove; 6. Positioning baffle; 7. Workpiece body; 8. Guide side plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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 are within the scope of protection of the present invention.

[0018] Please see Figures 1-11 The present invention provides a double-sided welding device for metal workpieces that can be welded without root cleaning, including a displacement tooling platform 1.

[0019] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a first fully mechanized welding robot 2 is installed on one side of the positioning fixture platform 1, and a second fully mechanized welding robot 3 is installed on the other side of the positioning fixture platform 1. A positioning baffle 6 is installed on the top of the positioning fixture platform 1, and a workpiece body 7 is installed on the top of the positioning fixture platform 1. A guide rail 4 is fixedly connected to the inner wall of the positioning fixture platform 1, and a positioning mechanism 5 is movably connected to the outer wall of the guide rail 4. The positioning mechanism 5 includes a guide slider 51 movably installed on the outer wall of the guide rail 4. A rotating shaft 52 is installed on the outer wall of the guide slider 51. An avoidance groove 521 is opened inside the rotating shaft 52. A receiving frame 522 is movably connected to the outer wall of the rotating shaft 52. A retaining ring 523 is fixedly connected to the inner wall of the receiving frame 522. An arc-shaped positioning plate 54 is fixedly connected to the outer wall of the receiving frame 522. A through groove 55 is opened inside the arc-shaped positioning plate 54. A rubber anti-slip block 56 is fixedly connected to the outer wall of the positioning plate 54. A threaded post 57 is fixedly connected to the top of the guide slider 51. A threaded block 58 is movably connected to the outer wall of the threaded post 57. A threaded groove 59 is opened inside the threaded block 58. The guide rail 4 is a slotted design. The guide slider 51 and the guide rail 4 form a sliding structure. The support frame 522 forms a rotating structure with the guide slider 51 through the rotating shaft 52. The retaining ring 523 is located in the clearance groove 521. A torsion spring 53 is sleeved on the outer wall of the rotating shaft 52. The arc-shaped positioning plate 54 is movably connected to the threaded post 57 through the through groove 55. The threaded post 57 is threadedly connected to the threaded block 58 through the threaded groove 59. The threaded post 57 and the threaded groove 59 are adapted to each other. The rubber anti-slip blocks 56 are evenly distributed on the outer wall of the arc-shaped positioning plate 54. The arc-shaped positioning plate 54 is movably connected to the torsion spring 53.

[0020] By placing the workpiece body 7 on the displacement fixture platform 1 and ensuring one side is in contact with the positioning baffle 6, the guide slider 51 is pulled, causing it to slide along the guide rail 4, which in turn moves the arc-shaped positioning plate 54 above the workpiece body 7. The threaded block 58 is then rotated. Since the threaded block 58 is threadedly connected to the threaded post 57 via the threaded groove 59, it can press against the arc-shaped positioning plate 54. Under the action of the rotating shaft 52, the arc-shaped positioning plate 54 rotates along the guide slider 51 and presses against the torsion spring 53. At this time, the retaining ring 523 rotates along the clearance groove 521, causing multiple rubber anti-slip blocks on the outer wall of the arc-shaped positioning plate 54 to... 56. Press the workpiece body 7 to position it. Under the pressure of the torsion spring 53, the threaded block 58 can be prevented from loosening. Similarly, the arc-shaped positioning plates 54 in other directions press the workpiece body 7. After the workpiece body 7 is positioned, the workpiece body 7 in the vertical direction is connected to it. The second fully mechanized welding robot 3 is started to weld the connection between the two workpiece bodies 7 first, which plays a role in backing. The first fully mechanized welding robot 2 starts welding at a certain interval. The purpose of welding is to perform penetration welding, ensure that there are no defects inside the weld, and realize double-sided welding without root cleaning.

[0021] Reference Figure 7 , Figure 9 , Figure 10 and Figure 11 As shown, a transmission roller 541 is movably connected to the inner wall of the arc-shaped positioning plate 54. A support rod 542 is movably connected inside the transmission roller 541. An L-shaped bracket 543 is fixedly connected to one end of the support rod 542. A guide plate 544 is fixedly connected to the bottom of the L-shaped bracket 543. The guide plate 544 has an open design and a guide groove 545 is provided inside the guide plate 544. A movable rod 546 is movably connected inside the guide groove 545. A movable block 547 is fixedly connected to one end of the movable rod 546. An anti-slip pad 548 is fixedly connected to one side of the movable block 547. A support column 549 is movably connected inside the guide plate 544. A return spring 5491 is installed on the outer wall of 9 to allow the guide plate 544 to slide and return to its original position. A guide side plate 8 is fixedly connected to the top of the guide slider 51. The transmission roller 541 and the support rod 542 form a rotating structure. The guide plate 544 and the support column 549 form a sliding structure. The guide plate 544 and the guide side plate 8 form a sliding structure. The guide side plate 8 is symmetrically arranged about the central axis of the guide plate 544. The guide plate 544 and the movable rod 546 form a sliding structure through the guide groove 545. The guide slider 51 is a slotted design. The movable block 547 and the guide slider 51 form a sliding structure. The movable rod 546 and the guide slider 51 form a sliding structure.

[0022] As the arc-shaped positioning plate 54 flips and presses the transmission roller 541, the transmission roller 541 rotates along the support rod 542, and drives the guide plate 544 at the bottom of the L-shaped bracket 543 to slide down along the guide side plate 8. The guide plate 544 slides along the support column 549 and presses the reset spring 5491, causing the movable rod 546 to slide along the guide groove 545. This causes the movable rod 546 to slide outward along the guide slider 51, so that the movable block 547, which is fixedly connected to one end of the movable rod 546, slides along the guide slider 51. This causes the anti-slip pad 548 to extend and press the inner wall of the guide rail 4, further positioning the guide slider 51.

[0023] Reference Figure 8 , Figure 9 and Figure 10 As shown, a receiving rod 5441 is fixedly connected to the outer wall of the guide plate 544. A piston 5442 is fixedly connected to one end of the receiving rod 5441. An air cylinder 5443 is movably connected to the outer wall of the piston 5442. The air cylinder 5443 is fixedly installed on the top of the guide slider 51. An air guide pipe 5444 is fixedly connected to the outer wall of the air cylinder 5443. An adsorption hole 5445 is opened inside the guide slider 51. The piston 5442 and the air cylinder 5443 form a sliding structure. The receiving rod 5441 and the air cylinder 5443 form a sliding structure. An air delivery channel is opened inside the guide slider 51. The input end of the channel is connected to the adsorption hole 5445.

[0024] As the guide plate 544 moves downward, the piston 5442, which is fixedly connected to one end of the receiving rod 5441, slides downward along the air cylinder 5443, causing the internal volume of the air cylinder 5443 to increase and the pressure to decrease, forming a negative pressure. Under the action of atmospheric pressure, outside air is drawn into the air cylinder 5443, causing the air between the guide slider 51 and the guide rail 4 to be drawn into the air pipe 5444 through the adsorption hole 5445, thereby positioning the guide slider 51 and ensuring that the arc-shaped positioning plate 54 will not move after being clamped and positioned.

[0025] A welding method using the welding equipment as described in any one of claims 1-9, comprising the following steps: S1. By placing the workpiece body 7 on the displacement tooling platform 1 and making one side of it abut against the positioning baffle 6, pull the guide slider 51 to guide it to slide along the guide rail 4, and drive the arc-shaped positioning plate 54 to move above the workpiece body 7. Rotate the threaded block 58 to squeeze the arc-shaped positioning plate 54, and drive the arc-shaped positioning plate 54 to rotate along the guide slider 51, so that the multiple rubber anti-slip blocks 56 on the outer wall of the arc-shaped positioning plate 54 squeeze the workpiece body 7, and position the workpiece body 7. S2. As the arc-shaped positioning plate 54 flips and squeezes the transmission roller 541, the transmission roller 541 rotates along the support rod 542, and drives the guide plate 544 at the bottom of the L-shaped bracket 543 to slide down along the guide side plate 8, so that the movable rod 546 slides along the guide groove 545, and the movable block 547 fixedly connected to one end of the movable rod 546 slides along the guide slider 51, so that the anti-slip pad 548 extends out and squeezes the inner wall of the guide rail 4, and the guide slider 51 is further positioned. S3. As the guide plate 544 moves down, the piston 5442, which is fixedly connected to one end of the receiving rod 5441, slides along the air cylinder 5443, generating negative pressure. This causes the air between the guide slider 51 and the guide rail 4 to be drawn into the air pipe 5444 through the adsorption hole 5445, thus positioning the guide slider 51 and preventing the arc-shaped positioning plate 54 from shifting after being clamped and positioned. S4. By starting the second fully mechanized welding robot 3, it performs the welding of the workpiece body 7. Then, the first fully mechanized welding robot 2 starts the penetration welding at certain intervals to ensure that there are no defects inside the weld.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-sided welding device for metal workpieces that can be welded without cleaning the root, comprising a displacement tooling platform (1). Its features are: A first fully mechanized welding robot (2) is provided on one side of the positional tooling platform (1), a second fully mechanized welding robot (3) is provided on the other side of the positional tooling platform (1), a positioning baffle (6) is installed on the top of the positional tooling platform (1), and a workpiece body (7) is provided on the top of the positional tooling platform (1). The inner wall of the displacement tooling platform (1) is fixedly connected to a guide rail (4), and the outer wall of the guide rail (4) is movably connected to a positioning mechanism (5). The positioning mechanism (5) includes a guide slider (51) movably mounted on the outer wall of the guide rail (4). A rotating shaft (52) is mounted on the outer wall of the guide slider (51). An clearance groove (521) is provided inside the rotating shaft (52). A receiving frame (522) is movably connected to the outer wall of the rotating shaft (52). The inner wall of the receiving frame (522) is fixedly connected to the guide slider (51). A retaining ring (523) is fixedly connected to the outer wall of the receiving frame (522), and an arc-shaped positioning plate (54) is fixedly connected to the outer wall of the arc-shaped positioning plate (54). A through groove (55) is opened inside the arc-shaped positioning plate (54), and a rubber anti-slip block (56) is fixedly connected to the outer wall of the arc-shaped positioning plate (54). A threaded column (57) is fixedly connected to the top of the guide slider (51), and a threaded block (58) is movably connected to the outer wall of the threaded column (57). A threaded groove (59) is opened inside the threaded block (58).

2. The double-sided welding equipment for metal workpieces that can be welded without root cleaning according to claim 1, characterized in that: The guide rail (4) is a slotted design. The guide slider (51) and the guide rail (4) form a sliding structure. The support frame (522) and the guide slider (51) form a rotating structure through the rotating shaft (52). The retaining ring (523) is located in the clearance groove (521).

3. The double-sided welding equipment for metal workpieces that can be welded without root cleaning according to claim 1, characterized in that: A torsion spring (53) is fitted on the outer wall of the rotating shaft (52), and the arc-shaped positioning plate (54) is movably connected to the threaded column (57) through the through groove (55).

4. The double-sided welding equipment for metal workpieces that can be welded without root cleaning according to claim 1, characterized in that: The threaded column (57) is threadedly connected to the threaded block (58) through the threaded groove (59), and the rubber anti-slip block (56) is evenly distributed on the outer wall of the arc-shaped positioning plate (54).

5. The double-sided welding equipment for metal workpieces that can be welded without root cleaning according to claim 1, characterized in that: The inner wall of the arc-shaped positioning plate (54) is movably connected to a transmission roller (541), the inside of the transmission roller (541) is movably connected to a support rod (542), one end of the support rod (542) is fixedly connected to an L-shaped bracket (543), the bottom of the L-shaped bracket (543) is fixedly connected to a guide plate (544), the inside of the guide plate (544) is provided with a guide groove (545), the inside of the guide groove (545) is movably connected to a movable rod (546), one end of the movable rod (546) is fixedly connected to a movable block (547), one side of the movable block (547) is fixedly connected to an anti-slip pad (548), the inside of the guide plate (544) is movably connected to a support column (549), the outer wall of the support column (549) is fitted with a reset spring (5491), and the top of the guide slider (51) is fixedly connected to a guide side plate (8).

6. The double-sided welding equipment for metal workpieces that can be welded without root cleaning according to claim 5, characterized in that: The transmission roller (541) and the support rod (542) form a rotating structure, the guide plate (544) and the support column (549) form a sliding structure, the guide plate (544) and the guide side plate (8) form a sliding structure, and the guide side plate (8) is symmetrically arranged about the central axis of the guide plate (544).

7. The double-sided welding equipment for metal workpieces that can be welded without root cleaning according to claim 5, characterized in that: The guide plate (544) forms a sliding structure with the movable rod (546) through the guide groove (545). The guide slider (51) is a slotted design. The movable block (547) and the guide slider (51) form a sliding structure. The movable rod (546) and the guide slider (51) form a sliding structure.

8. A double-sided welding device for metal workpieces that can be welded without root cleaning according to claim 5, characterized in that: A receiving rod (5441) is fixedly connected to the outer wall of the guide plate (544), a piston (5442) is fixedly connected to one end of the receiving rod (5441), an air cylinder (5443) is movably connected to the outer wall of the piston (5442), an air guide pipe (5444) is fixedly connected to the outer wall of the air cylinder (5443), and an adsorption hole (5445) is opened inside the guide slider (51).

9. A double-sided welding device for metal workpieces that eliminates the need for root cleaning, as described in claim 8, characterized in that: The piston (5442) and the air cylinder (5443) form a sliding structure, and the receiving rod (5441) and the air cylinder (5443) form a sliding structure.

10. A welding method using the welding equipment as described in any one of claims 1-9, comprising the following steps, characterized in that: S1. By placing the workpiece body (7) on the displacement tooling platform (1) and making one side of it stick to the positioning baffle (6), pull the guide slider (51) to guide it to slide along the guide rail (4), drive the arc positioning plate (54) to move above the workpiece body (7), rotate the threaded block (58) to squeeze the arc positioning plate (54), drive the arc positioning plate (54) to rotate along the guide slider (51), so that the multiple rubber anti-slip blocks (56) on the outer wall of the arc positioning plate (54) squeeze the workpiece body (7) and position the workpiece body (7); S2. As the arc-shaped positioning plate (54) flips and squeezes the transmission roller (541), the transmission roller (541) rotates along the support rod (542) and drives the guide plate (544) at the bottom of the L-shaped bracket (543) to slide down along the guide side plate (8), so that the movable rod (546) slides along the guide groove (545), so that the movable block (547) fixedly connected to one end of the movable rod (546) slides along the guide slider (51), so that the anti-slip pad (548) extends out and squeezes the inner wall of the guide rail (4), so that the guide slider (51) is further positioned. S3. As the guide plate (544) moves down, the piston (5442) fixedly connected to one end of the receiving rod (5441) slides along the air cylinder (5443), generating negative pressure. This causes the air between the guide slider (51) and the guide rail (4) to be drawn into the air pipe (5444) through the adsorption hole (5445), thus positioning the guide slider (51) and preventing the arc-shaped positioning plate (54) from shifting after being clamped and positioned. S4. By starting the second fully mechanized welding robot (3), it performs the welding of the workpiece body (7) as a base layer. Then, the first fully mechanized welding robot (2) starts the penetration welding at certain intervals to ensure that there are no defects inside the weld.

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