Tooling for welding a metal product

Abstract

This utility model relates to the field of welding technology and discloses a tooling for welding metal products, including a base plate, a mounting plate, a fixing plate, etc. The top of the base plate is provided with a support structure, a first clamping structure, a second clamping structure, and a telescopic structure. The support structure includes a trapezoidal support platform and a first support plate, providing a stable reference. The first clamping structure achieves vertical fixation by driving the first pressure plate to rotate through a first cylinder. The second clamping structure is driven by a third cylinder to move the second pressure plate, forming a lateral bidirectional constraint with the clamping block of the telescopic structure. In the telescopic structure, the second cylinder pushes the sliding shaft and the clamping block to move. The V-groove is adapted to workpieces of different diameters. This device achieves precise clamping of metal products of different sizes through the linkage of multiple sets of pneumatic structures, improving welding accuracy and efficiency, adapting to automated production lines, and reducing labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to a tooling for welding metal products. Background Technology

[0002] Welding fixtures are specialized auxiliary devices used to fix and support workpieces to be welded during the welding process of metal products. Their core function is to ensure the relative positional accuracy of the workpieces during welding, reduce welding deformation, and provide a stable working reference for operators or automated equipment, thereby improving welding quality and production efficiency. In the field of metal product processing, especially in the welding of components with complex structures and high precision requirements, welding fixtures are key equipment for achieving standardized and efficient production.

[0003] Traditional metal product welding fixtures often suffer from fixed structures and poor adaptability, mostly only capable of clamping workpieces of specific specifications or shapes. When faced with metal products of different sizes and structures, frequent fixture changes or extensive adjustments are required, which not only increases equipment investment costs but also significantly extends production preparation time. In addition, the clamping structure design of some traditional fixtures is unreasonable, either resulting in insufficient clamping force causing workpiece displacement during welding and affecting welding accuracy, or excessive clamping causing workpiece surface damage or deformation. Furthermore, their operation process largely relies on manual adjustment, which is not only labor-intensive but also makes it difficult to ensure the consistency of clamping force, thus adversely affecting the stability of welding quality. To address these issues, we propose a new type of metal product welding fixture. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tooling for welding metal products, which solves the aforementioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a tooling for welding metal products, comprising: The base plate, the fixed plate, and the mounting plate are provided. A set of symmetrical handles are rotatably installed on both sides of the base plate. An L-shaped mounting plate is fixedly installed on one side of the top of the base plate. A telescopic structure is provided on the side of the mounting plate. A set of axisymmetric second fixing frames is fixedly installed on the top of the base plate corresponding to the side of the mounting plate. The second fixing frames are L-shaped and a second clamping structure is provided on the side of the second fixing frames facing the mounting plate. A support structure is located at the center of the top of the base plate, and the support structure is on the center line of the second fixing frame on both sides. The first clamping structure is set on the top of the base plate, and the first clamping structure is set on the side of the top of the base plate away from the side where the second fixing frame is installed. The first clamping structure is on the outside of the support structure. A fixing structure is installed on the top of the base plate, and the fixing structure is located in the middle of the second fixing frame on both sides, and its bottom is fixedly connected to the base plate.

[0006] Preferably, the support structure includes a support platform and a first support plate. The support platform is fixedly installed at the center of the top of the base plate by bolts. The support platform is trapezoidal, and the first support plate is fixedly installed on the top of the support platform.

[0007] Preferably, the first clamping structure includes an installation part and a clamping part. The installation part includes a first fixing frame and a support plate. The first fixing frame is fixedly installed on the top of the base plate and is symmetrically distributed on the top of the base plate. The first fixing frame is L-shaped, and the support plate is fixedly installed on the top of the first fixing frame.

[0008] Preferably, the pressing part includes a first cylinder, a first fixed seat, and a first pressure plate. The first cylinder is fixedly installed at the bottom of the support plate. The telescopic rod of the first cylinder passes through the side wall of the support plate and is rotatably connected to the first pressure plate at its top. The first fixed seat is fixedly installed on one side of the top of the support plate. The top of the first fixed seat is rotatably connected to the side of the first pressure plate. The other end of the first pressure plate is hook-shaped.

[0009] Preferably, the telescopic structure includes a second cylinder, a connecting plate, a bushing, a sliding shaft, and a clamping block. The second cylinder is fixedly installed on the inner side wall of the mounting plate. The telescopic rod of the second cylinder passes through the side wall of the mounting plate. The other end of the second cylinder is fixedly connected to the connecting plate. The connecting plate is T-shaped. A set of parallel sliding shafts are fixedly connected to both sides of the top end of the connecting plate. A set of symmetrical bushings is fixedly installed on the side wall of the mounting plate corresponding to the connecting plate. The sliding shafts are slidably installed in the bushings. The other end of the sliding shaft is fixedly connected to an L-shaped clamping block. A V-shaped groove is opened on the side of the horizontal part of the clamping block.

[0010] Preferably, the second pressing structure includes a third cylinder, a second pressure plate, and a second fixed seat. The third cylinder is fixedly installed on the outer side wall of the second fixed frame. The telescopic rod of the third cylinder passes through the side wall of the second fixed frame and is rotatably connected to the second pressure plate at its end. The second fixed seat is fixedly installed on the inner side wall of the second fixed frame. The other end of the second fixed seat is rotatably connected to the side of the second pressure plate. The shape of the second pressure plate is the same as that of the first fixed seat.

[0011] Preferably, the fixing structure includes a fixing plate and a second support plate. The fixing plate is fixedly installed between the two second fixing frames. The outer side of the fixing plate is provided with reinforcing ribs. A set of symmetrical second support plates is fixedly installed on the inner wall of the fixing plate corresponding to the position of the second pressure plate.

[0012] Compared with the prior art, this utility model provides a tooling for welding metal products, which has the following advantages: 1. This metal welding fixture achieves flexible clamping of metal products of different sizes and shapes through multiple adjustable structures. In the telescopic structure, the second cylinder drives the sliding shaft to slide along the bushing, causing the V-groove of the clamping block to adapt to cylindrical workpieces of different diameters. The first and second clamping structures are driven by cylinders to rotate the pressure plate, which can adjust the clamping force and angle according to the workpiece thickness. This design eliminates the need for frequent tooling changes. When dealing with workpieces of various specifications, adjustments can be made simply by telescopic cylinder extension, significantly reducing equipment investment costs. The trapezoidal support platform and the first support plate of the support structure provide a stable center for the workpiece. The device features a central support structure to prevent deformation caused by center of gravity shift during welding. The first and second clamping structures adopt a lever-type design of "cylinder + fixed seat + pressure plate". The pressure is precisely controlled by the cylinder to ensure uniform and adjustable clamping force, preventing both workpiece loosening and excessive compression. The first, second, and third cylinders drive the corresponding pressure plates or clamping blocks to move. Operators only need to control the valve to complete the positioning and fixing of the workpiece without manually tightening bolts or wrenches. At the same time, the handles on both sides of the device facilitate overall movement and are compatible with the docking of automated welding production lines and robotic workstations, reducing manual intervention. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the fixing plate of this utility model; Figure 3 This is a schematic diagram of the connecting plate of this utility model; Figure 4 This is a schematic diagram of the bushing of this utility model.

[0014] In the diagram: 1. Base plate; 2. Handle; 3. Support platform; 4. First support plate; 5. First fixing frame; 6. Support plate; 7. First cylinder; 8. First fixing seat; 9. First pressure plate; 10. Second cylinder; 11. Connecting plate; 12. Bushing; 13. Sliding shaft; 14. Clamping block; 15. Second fixing frame; 16. Third cylinder; 17. Second pressure plate; 18. Second fixing seat; 19. Fixing plate; 20. Second support plate; 21. Mounting plate Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4 A tooling for welding metal products, comprising: The base plate 1, the fixing plate 19, and the mounting plate 21 are provided. A set of symmetrical handles 2 are rotatably installed on both sides of the base plate 1. An L-shaped mounting plate 21 is fixedly installed on one side of the top of the base plate 1. A telescopic structure is provided on the side of the mounting plate 21. A set of axisymmetric second fixing frames 15 is fixedly installed on the top of the base plate 1 corresponding to the side of the mounting plate 21. The second fixing frames 15 are L-shaped. A second clamping structure is provided on the side of the second fixing frames 15 facing the mounting plate 21. The support structure is located at the top center of the base plate 1, and the support structure is on the center line of the second fixing frame 15 on both sides. The first pressing structure is set on the top of the base plate 1. The first pressing structure is set on the side of the top of the base plate 1 away from the side where the second fixing frame 15 is installed. The first pressing structure is on the outside of the support structure. The fixing structure is set on the top of the base plate 1. The fixing structure is set in the middle of the second fixing frame 15 on both sides, and the bottom is fixedly connected to the base plate 1.

[0017] Furthermore, the support structure includes a support platform 3 and a first support plate 4. The support platform 3 is fixedly installed at the center of the top of the base plate 1 by bolts. The support platform 3 is trapezoidal, and the first support plate 4 is fixedly installed on the top of the support platform 3. The trapezoidal structure can not only disperse the weight of the workpiece by tilting the side, thus enhancing the overall support stability, but also finely adjust the installation height of the support platform 3 by changing the bolt position according to different workpiece heights, thereby improving the adaptability to workpieces of different thicknesses. The surface of the first support plate 4 is polished to reduce frictional damage to the bottom of the workpiece. At the same time, its rigid connection with the support platform 3 ensures that there will be no relative displacement due to vibration during the welding process, providing continuous and stable reference support for the workpiece.

[0018] Furthermore, the first clamping structure includes an installation part and a clamping part. The installation part includes a first fixing frame 5 and a support plate 6. The first fixing frame 5 is fixedly installed on the top of the base plate 1, and the first fixing frame 5 is symmetrically distributed on the top of the base plate 1. The first fixing frame 5 is L-shaped, and the support plate 6 is fixedly installed on the top of the first fixing frame 5. The symmetrical layout of the first fixing frame 5 can make the clamping force evenly applied to both sides of the workpiece, avoiding the tilting of the workpiece caused by unilateral force. The L-shaped first fixing frame 5 enhances its load-bearing capacity through large-area welding of the bottom to the base plate 1, and can withstand the reaction force generated when the first cylinder 7 is working. The support plate 6 is made of high-strength alloy material, and its horizontal platform provides a stable installation base for the first cylinder 7 and the first fixing seat 8, while preventing bending deformation due to long-term force, ensuring that the rotation trajectory of the first pressure plate 9 is accurate and controllable.

[0019] Furthermore, the clamping part includes a first cylinder 7, a first fixed seat 8, and a first pressure plate 9. The first cylinder 7 is fixedly installed at the bottom of the support plate 6. The telescopic rod of the first cylinder 7 passes through the side wall of the support plate 6 and is rotatably connected to the first pressure plate 9 at its top. The first fixed seat 8 is fixedly installed on one side of the top of the support plate 6. The top of the first fixed seat 8 is rotatably connected to the side of the first pressure plate 9. The other end of the first pressure plate 9 is hook-shaped. The concealed installation design of the first cylinder 7 saves the top space of the tooling and avoids interference with welding equipment or workpieces. The rotatable connection between the first fixed seat 8 and the first pressure plate 9 uses a wear-resistant bearing to reduce mechanical wear caused by long-term rotation and extend the service life of the device. A rubber pad is pasted on the inner side of the hook-shaped end of the first pressure plate 9, which can increase the friction with the workpiece to prevent slippage and avoid indentation on the workpiece surface through elastic buffering. It is especially suitable for metal products with high surface precision requirements.

[0020] Furthermore, the telescopic structure includes a second cylinder 10, a connecting plate 11, bushings 12, sliding shafts 13, and clamping blocks 14. The second cylinder 10 is fixedly installed on the inner wall of the mounting plate 21. The telescopic rod of the second cylinder 10 passes through the side wall of the mounting plate 21. The other end of the second cylinder 10 is fixedly connected to the connecting plate 11. The connecting plate 11 is T-shaped. A set of parallel sliding shafts 13 are fixedly connected to both sides of the top end of the connecting plate 11. A set of symmetrical bushings 12 is fixedly installed on the side wall of the mounting plate 21 corresponding to the connecting plate 11. The sliding shafts 13 are slidably installed in the bushings 12. The other end of the sliding shafts 13 is fixedly connected to an L-shaped... The clamping block 14 has a V-shaped groove on the side of the horizontal part. The T-shaped connecting plate 11 evenly transmits the driving force of the second cylinder 10 to the two sliding shafts 13 on both sides, ensuring that the two clamping blocks 14 move synchronously and avoid workpiece displacement due to uneven force. The bushing 12 is inlaid with a self-lubricating bearing to reduce the frictional resistance when the sliding shaft 13 slides, making the extension and retraction action smoother and reducing component wear. The L-shaped structure of the clamping block 14 allows it to clamp the workpiece laterally through the V-shaped groove of the horizontal part and provide auxiliary support for the bottom of the workpiece through the vertical part, preventing the workpiece from tipping over under the action of lateral force.

[0021] Furthermore, the second clamping structure includes a third cylinder 16, a second pressure plate 17, and a second fixed seat 18. The third cylinder 16 is fixedly installed on the outer side wall of the second fixed frame 15. The telescopic rod of the third cylinder 16 passes through the side wall of the second fixed frame 15 and is rotatably connected to the second pressure plate 17 at its end. The second fixed seat 18 is fixedly installed on the inner side wall of the second fixed frame 15. The other end of the second fixed seat 18 is rotatably connected to the side of the second pressure plate 17. The shape of the second pressure plate 17 is the same as that of the first fixed seat 8. The third cylinder 16 is installed on the outer side wall of the second fixed frame 15, away from the welding area, to avoid welding spatter damaging the cylinder components. The welding of the second fixed seat 18 and the second fixed frame 15 adopts a full welding process to enhance the connection strength and ensure that it will not loosen when the third cylinder 16 applies maximum pressure. The shape of the second pressure plate 17 is adapted to the first fixed seat 8 so that it can form a surface contact with the workpiece surface when rotated to the clamping position, increasing the force-bearing area, reducing the pressure per unit area, and protecting the workpiece surface from damage.

[0022] Furthermore, the fixing structure includes a fixing plate 19 and a second support plate 20. The fixing plate 19 is fixedly installed between the two second fixing frames 15 on both sides. The outer side of the fixing plate 19 is provided with reinforcing ribs. A set of symmetrical second support plates 20 are fixedly installed on the inner wall of the fixing plate 19 corresponding to the position of the second pressure plate 17. The reinforcing ribs on the outer side of the fixing plate 19 are triangularly distributed. The principle of triangle stability is used to greatly improve the deformation resistance of the fixing plate 19 and ensure that the structural accuracy is maintained under the long-term pressure of the second pressure plate 17. The vertical connection between the second support plate 20 and the fixing plate 19 forms a stepped support, which can be adapted to different support positions according to the height of the workpiece. At the same time, the contact part between its top and the workpiece is rounded to avoid scratching the workpiece. The connection between the fixing plate 19 and the two second fixing frames 15 on both sides is fastened with bolts, which is convenient for later disassembly and maintenance. At the same time, the fixing plate 19 of different thicknesses can be replaced as needed to adapt to special workpieces.

[0023] Structural Description: Base plate 1: Base plate 1 is the basic load-bearing structure of the tooling. Symmetrical handles 2 are installed on both sides and the components are fixedly installed on the top, providing stable support for the entire device and serving as the reference platform for the installation of various structures. Handle 2: Handle 2 is a rotating structure installed on both sides of the base plate 1, which makes it easy for operators to move the entire tooling, adapt to different working scenarios, and improve the flexibility of the device; Support platform 3: Support platform 3 is a trapezoidal structure at the top center of the base plate 1. It is fixed with bolts and the first support plate 4 is installed on the top to distribute the weight of the workpiece. The height can be finely adjusted to adapt to different workpieces. First support plate 4: The first support plate 4 is fixed on the top of the support platform 3. The surface is polished to reduce frictional damage to the workpiece. It is rigidly connected to the support platform to provide stable reference support for the workpiece. First fixing frame 5: The first fixing frame 5 is an L-shaped structure symmetrically distributed on the top of the base plate 1. A support plate 6 is installed on the top, and the load-bearing capacity is enhanced by large-area welding, so that the clamping force is evenly applied to the workpiece. Support plate 6: The support plate 6 is fixed to the top of the first fixed frame 5. It is made of high-strength alloy material and provides a stable installation base for the first cylinder 7 and the first fixed seat 8 to prevent deformation under stress. First cylinder 7: The first cylinder 7 is installed at the bottom of the support plate 6. The telescopic rod is connected to the first pressure plate 9. The hidden design saves space. The pressure plate is rotated by telescopic drive to achieve clamping. The pressure is adjustable. First fixed seat 8: The first fixed seat 8 is fixed on the top of the support plate 6 and is rotatably connected to the first pressure plate 9. It adopts wear-resistant bearings to reduce mechanical wear and ensure the accurate rotation trajectory of the pressure plate. First pressure plate 9: One end of the first pressure plate 9 is rotatably connected to the first cylinder 7, and the other end is hook-shaped with a rubber pad on the inside. It rotates with the first fixed seat 8 as the fulcrum to press the top of the workpiece and prevent damage. Second cylinder 10: The second cylinder 10 is installed inside the mounting plate 21. The telescopic rod is connected to the connecting plate 11 to provide driving force. The telescopic rod drives the sliding shaft 13 and the clamping block 14 to move and achieve lateral fixation. Connecting plate 11: The connecting plate 11 is T-shaped and connects the second cylinder 10 and the sliding shaft 13. It evenly transmits the driving force to the sliding shafts on both sides to ensure that the clamping blocks 14 move synchronously and avoid workpiece displacement. Bushing 12: Bushing 12 is a symmetrical structure on the side wall of mounting plate 21. It has a self-lubricating bearing on the inner side for sliding shaft 13, reducing frictional resistance, making the extension and retraction movements smooth, and reducing wear. Sliding shaft 13: One end of the sliding shaft 13 is connected to the connecting plate 11, and the other end is connected to the clamping block 14. It slides inside the bushing 12, transmits the driving force of the second cylinder 10, and drives the clamping block 14 to move laterally. Clamping block 14: Clamping block 14 is L-shaped, with one end connected to sliding shaft 13. The horizontal part has a V-shaped groove on the side to accommodate workpieces of different diameters, and the vertical part provides auxiliary support to prevent the workpiece from tipping over. Second fixing frame 15: The second fixing frame 15 is a symmetrical L-shaped structure on the top of the base plate 1. The third cylinder 16 is installed on the outside and the second fixing seat 18 is installed on the inside to provide support for the second pressing structure. Third cylinder 16: The third cylinder 16 is installed on the outside of the second fixed frame 15. The telescopic rod is connected to the second pressure plate 17 and is kept away from the welding area to prevent damage. The pressure plate is rotated by telescopic drive to achieve pressing. Second pressure plate 17: The second pressure plate 17 is rotatably connected to the third cylinder 16 and the second fixed seat 18. Its shape is adapted to the first fixed seat 8. After rotation, it contacts the workpiece surface to protect the workpiece surface. Second fixing seat 18: The second fixing seat 18 is fixed inside the second fixing frame 15 and is rotatably connected to the second pressure plate 17. The full welding process is used to enhance the strength and ensure the stable rotation of the pressure plate. Fixing plate 19: The fixing plate 19 is installed between the second fixing brackets 15 on both sides. It has triangular reinforcing ribs on the outside and is fixed by bolts to provide reverse support and facilitate disassembly and maintenance. Second support plate 20: The second support plate 20 is fixed to the inner wall of the fixed plate 19, corresponding to the position of the second pressure plate 17. It is stepped and has rounded corners at the top, which can adapt to workpieces of different heights and prevent scratches. Mounting plate 21: Mounting plate 21 is an L-shaped structure on the top of base plate 1. The second cylinder 10 is installed on the inner side, and the side wall has a bushing 12, which provides an installation base and support for the telescopic structure. Working principle: During operation, the workpiece to be welded is first placed on the first support plate 4 of the support structure. The trapezoidal support platform 3 provides a stable bottom support for the workpiece, ensuring that the center of the workpiece is aligned with the center line of the second fixing brackets 15 on both sides, laying the benchmark for subsequent multi-directional fixing. Subsequently, the telescopic structure is activated, and the second cylinder 10 on the inner side of the mounting plate 21 pushes the telescopic rod to extend, causing the connecting plate 11 and the sliding shafts 13 on both sides to slide synchronously along the bushing 12, so that the L-shaped clamping block 14 moves towards the workpiece until the V-shaped groove of the horizontal part of the clamping block 14 fits against the side of the workpiece. The pressure of the second cylinder 10 initially fixes the workpiece laterally. The V-shaped groove design can adapt to cylindrical workpieces of different diameters, avoiding workpiece displacement during clamping. At the same time as the telescopic structure completes the lateral fixing, the second pressing structure is activated simultaneously. The third cylinder 16 on the outer side of the second fixing bracket 15 drives the telescopic rod to extend and retract, causing the second pressure plate 17 to rotate around the second fixing seat 18 as the fulcrum, so that the end of the second pressure plate 17 moves towards the workpiece. The workpiece is brought close to and tightly pressed against the side of the workpiece, forming a two-way lateral constraint with the clamping block 14. At this time, the fixing plate 19 of the fixing structure and the inner second support plate 20 provide reverse support on the other side of the workpiece. Together with the pressure of the second pressure plate 17, the stability of the lateral clamping is further enhanced. The reinforcing ribs on the outside of the fixing plate improve the overall structure's resistance to deformation and prevent tooling deformation due to excessive pressure during welding. After the lateral fixing is completed, the first clamping structure starts to operate. The first cylinder 7 at the top of the first fixing frame 5 pushes the telescopic rod upward, causing the first pressure plate 9 to rotate with the first fixing seat 8 as the fulcrum. Its hook-shaped end flips downward and presses against the top edge of the workpiece. The workpiece is vertically fixed on the first support plate 4 using the lever principle, avoiding vertical displacement of the workpiece due to thermal expansion or external force during welding. The pressure of each cylinder can be adjusted according to the material and thickness of the workpiece to ensure that the clamping force is sufficient to stabilize the workpiece without causing damage or deformation to the workpiece surface.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for welding metal products, characterized in that, include: The base plate (1), the fixing plate (19), and the mounting plate (21) are provided. A set of symmetrical handles (2) are rotatably installed on both sides of the base plate (1). An L-shaped mounting plate (21) is fixedly installed on one side of the top of the base plate (1). A telescopic structure is provided on the side of the mounting plate (21). A set of axisymmetric second fixing frames (15) is fixedly installed on the top of the base plate (1) corresponding to the side of the mounting plate (21). The second fixing frames (15) are L-shaped. A second pressing structure is provided on the side of the second fixing frames (15) facing the mounting plate (21). A support structure is set at the top center of the base plate (1), the support structure being on the center line of the second fixing frame (15) on both sides; The first pressing structure is set on the top of the base plate (1), and the first pressing structure is set on the side of the top of the base plate (1) away from the side where the second fixing frame (15) is installed. The first pressing structure is on the outside of the support structure. The fixing structure is set on the top of the base plate (1), and the fixing structure is set in the middle of the second fixing frame (15) on both sides, and the bottom is fixedly connected to the base plate (1).

2. The tooling for welding metal products according to claim 1, characterized in that, The support structure includes a support platform (3) and a first support plate (4). The support platform (3) is fixedly installed at the center of the top of the base plate (1) by bolts. The support platform (3) is trapezoidal, and the first support plate (4) is fixedly installed on the top of the support platform (3).

3. The tooling for welding metal products according to claim 1, characterized in that, The first clamping structure includes an installation part and a clamping part. The installation part includes a first fixing frame (5) and a support plate (6). The first fixing frame (5) is fixedly installed on the top of the base plate (1), and the first fixing frame (5) is symmetrically distributed on the top of the base plate (1). The first fixing frame (5) is L-shaped, and the support plate (6) is fixedly installed on the top of the first fixing frame (5).

4. The tooling for welding metal products according to claim 3, characterized in that, The pressing part includes a first cylinder (7), a first fixed seat (8) and a first pressure plate (9). The first cylinder (7) is fixedly installed at the bottom of the support plate (6). The telescopic rod of the first cylinder (7) passes through the side wall of the support plate (6) and is rotatably connected to the first pressure plate (9) at its top. The first fixed seat (8) is fixedly installed on one side of the top of the support plate (6). The top of the first fixed seat (8) is rotatably connected to the side of the first pressure plate (9). The other end of the first pressure plate (9) is hook-shaped.

5. The tooling for welding metal products according to claim 1, characterized in that, The telescopic structure includes a second cylinder (10), a connecting plate (11), a bushing (12), a sliding shaft (13), and a clamping block (14). The second cylinder (10) is fixedly installed on the inner side wall of the mounting plate (21). The telescopic rod of the second cylinder (10) passes through the side wall of the mounting plate (21). The other end of the second cylinder (10) is fixedly connected to the connecting plate (11). The connecting plate (11) is T-shaped. A set of parallel sliding shafts (13) are fixedly connected to both sides of the top end of the connecting plate (11). A set of symmetrical bushings (12) is fixedly installed on the side wall of the mounting plate (21) corresponding to the connecting plate (11). The sliding shaft (13) is slidably installed in the bushing (12). The other end of the sliding shaft (13) is fixedly connected to an L-shaped clamping block (14). A V-shaped groove is opened on the side of the horizontal part of the clamping block (14).

6. The tooling for welding metal products according to claim 1, characterized in that, The second pressing structure includes a third cylinder (16), a second pressure plate (17), and a second fixed seat (18). The third cylinder (16) is fixedly installed on the outer side wall of the second fixed frame (15). The telescopic rod of the third cylinder (16) passes through the side wall of the second fixed frame (15) and is rotatably connected to the second pressure plate (17) at its end. The second fixed seat (18) is fixedly installed on the inner side wall of the second fixed frame (15). The other end of the second fixed seat (18) is rotatably connected to the side of the second pressure plate (17). The shape of the second pressure plate (17) is the same as that of the first fixed seat (8).

7. The tooling for welding metal products according to claim 6, characterized in that, The fixing structure includes a fixing plate (19) and a second support plate (20). The fixing plate (19) is fixedly installed between the second fixing frames (15) on both sides. The outer side of the fixing plate (19) is provided with reinforcing ribs. A set of symmetrical second support plates (20) is fixedly installed on the inner wall of the fixing plate (19) corresponding to the position of the second pressure plate (17).

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