A welding equipment for return oil pipes with clamping and positioning function

Abstract

This utility model relates to the field of oil return pipe welding technology, and in particular to an oil return pipe welding device with clamping and positioning function. The oil return pipe welding device with clamping and positioning function includes: a working platform, a sliding groove on the rear side of the top of the working platform, a column slidably connected to the inner wall of the sliding groove, a carrying plate installed on the top of the column, an electric push rod installed on the top of the carrying plate, a plasma welding device installed at the driving end of the electric push rod, a baffle installed on the rear side of the inner wall of the sliding groove, a driving assembly installed inside the rear side of the working platform, and a fixing plate installed on the right side of the top of the working platform. The oil return pipe welding device with clamping and positioning function provided by this utility model not only ensures clamping stability and avoids displacement of the oil return pipe during welding, but also eliminates pipe wall deformation caused by excessive clamping force, improves weld sealing and structural strength, reduces the impact of human operation error on welding quality, improves equipment versatility, and reduces production equipment investment costs.

Description

Technical Field

[0001] This utility model relates to the field of oil return pipe welding technology, and in particular to an oil return pipe welding device with clamping and positioning function. Background Technology

[0002] The return oil pipe welding equipment is a specialized piece of equipment used for welding return oil pipes in various pipeline systems. Its core functions include butt welding of the return oil pipe body and joints, ensuring the sealing and structural strength of the weld. This equipment needs to be equipped with clamping and positioning functions because return oil pipes are mostly small-diameter fittings and require high welding precision. Clamping and positioning can accurately fix the workpiece position, limit the displacement and deformation of the fittings during welding, and avoid problems such as weld misalignment and uneven weld gaps. It also ensures the coaxiality of the parts to be welded, ensuring stable welding quality and meeting the sealing and performance requirements of the return oil pipe.

[0003] Currently, most return oil pipes are welded using rigid chucks that directly clamp them. For thin-walled, small-diameter return oil pipes, excessive clamping force can easily cause the pipe wall to be flattened and deformed, damaging the pipe's diameter and structural integrity. Furthermore, during welding, the welding torch positioning often relies on manual adjustment, which is not only slow and inaccurate but also prone to uneven heat input due to human error, affecting weld strength. In addition, the clamping distance on both sides is mostly a fixed structure, which cannot adapt to different lengths, resulting in poor versatility and increasing the investment cost of production equipment.

[0004] Therefore, it is necessary to provide a new oil return pipe welding device with clamping and positioning function to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a return oil pipe welding equipment with clamping and positioning function.

[0006] The oil return pipe welding equipment with clamping and positioning function provided by this utility model includes: a working platform, a sliding groove on the rear side of the top of the working platform, a column slidably connected to the inner wall of the sliding groove, a carrying plate installed on the top of the column, an electric push rod installed on the top of the carrying plate, a plasma welding device installed at the drive end of the electric push rod, a baffle installed on the rear side of the inner wall of the sliding groove, a drive assembly installed inside the rear side of the working platform, a fixing plate installed on the right side of the top of the working platform, a three-jaw chuck installed on one side of the fixing plate, a rotating shaft installed on the inner wall of the fixing plate near the three-jaw chuck, and a rotating shaft installed inside the top of the fixing plate. It has a speed regulator, a second motor installed at the top of the fixed plate, a sliding plate slidably connected to the top left of the work platform, a support column installed at the top of the sliding plate, an annular retaining ring installed at the top of the support column, a bolt threaded to the inner wall of the top of the annular retaining ring, an upper clamping block rotatably connected to the bottom of the bolt, multiple upper rollers rotatably connected to the bottom of the upper clamping block, a sliding rod slidably connected to the inner wall of the bottom of the annular retaining ring, a lower clamping block installed at the top of the sliding rod, multiple lower rollers rotatably connected to the inner wall of the top of the lower clamping block, a spring component installed inside the top of the support column, and a position adjustment component installed inside the front side of the work platform.

[0007] Preferably, the drive assembly includes a first threaded rod, the end of which is rotatably connected to the rear interior of the work platform, a first threaded block is threadedly connected to the outside of the first threaded rod, a connecting block is installed on the rear side of the first threaded block, a vertical plate is installed on the top of the connecting block, a first connecting block is installed on the front side of the vertical plate, and a first motor is installed on one side of the work platform.

[0008] Preferably, the elastic component includes a baffle plate, the outer side of which is slidably connected to the inner top of the support column, and a spring is installed inside the inner top of the support column.

[0009] Preferably, the position adjustment component includes a second threaded block, the outer side of which is slidably connected to the inner front side of the working platform, a second connecting block symmetrically installed on the top of the second threaded block, a second threaded rod rotatably connected to the inner front side of the working platform, a third motor installed on the other side of the working platform, and elongated holes symmetrically opened on the top of the working platform.

[0010] Preferably, the end of the rotating shaft away from the fixed plate is fixedly connected to the side of the three-jaw chuck near the fixed plate, the output end of the speed controller is fixedly connected to the end of the three-jaw chuck near the fixed plate, and the drive end of the second motor is fixedly connected to the input end of the speed controller.

[0011] Preferably, the upper clamping block is smaller than the lower clamping block, and the outer arc of the upper clamping block can contact the inner arc of the lower clamping block during movement.

[0012] Preferably, the outer side of the first threaded block is slidably connected to the rear interior of the working platform, the side of the first connecting block away from the vertical plate is fixedly connected to the rear bottom of the column, the outer side of the first connecting block is slidably connected to the inner wall of the baffle, and the drive end of the first motor is fixedly connected to one end of the first threaded rod.

[0013] Preferably, the top end of the spring is fixedly connected to the bottom end of the baffle, the bottom end of the spring is fixedly connected to the inner side of the top end of the support column, and the bottom end of the sliding rod is fixedly connected to the top end of the baffle.

[0014] Preferably, the drive end of the third motor is fixedly connected to one end of the second threaded rod, and the outer side of the second connecting block is slidably connected to the inner wall of the elongated hole.

[0015] Compared with related technologies, the oil return pipe welding equipment with clamping and positioning function provided by this utility model has the following beneficial effects:

[0016] This utility model adopts an asymmetrical clamping structure with a single-sided three-jaw chuck for centering and clamping, and an elastic roller for clamping on the other side. The three-jaw chuck only clamps a small area of ​​the return oil pipe opening, and its core is responsible for coaxial centering and rotational power transmission without generating excessive squeezing force. The left side uses bolts, upper clamping blocks, and lower clamping blocks in conjunction with springs to achieve elastic clamping. The upper and lower rollers use rolling contact instead of hard-surface clamping. The spring force adaptively buffers and limits the maximum clamping force, which not only ensures clamping stability and avoids displacement of the return oil pipe during welding, but also prevents pipe wall deformation caused by excessive clamping force. At the same time, the roller follow-up design can reduce the frictional resistance when the return oil pipe rotates, taking into account both clamping protection and rotational stability.

[0017] This utility model employs a drive assembly consisting of a first motor, a first threaded rod, and a first threaded block, which drives the column to slide within a sliding groove, thereby achieving lateral position adjustment of the plasma welding device. This allows for rapid alignment with the center of the circumferential seam to be welded on the return oil pipe. In conjunction with an electric push rod, the plasma welding device is vertically raised and lowered, adjusting the distance between the welding torch nozzle and the weld seam. This ensures uniform heat input during welding, effectively avoiding defects such as weld misalignment, incomplete penetration, and burn-through. It also improves weld sealing and structural strength, and reduces the impact of human error on welding quality.

[0018] This utility model uses an adjustment position assembly consisting of a third motor, a second threaded rod, and a second threaded block to drive the second connecting block to slide within the elongated hole, thereby driving the sliding plate to slide at the top of the work platform. This allows for flexible adjustment of the distance between the sliding plate and the fixed plate, adapting to the clamping requirements of return oil pipes of different lengths, improving the versatility of the equipment, and reducing the investment cost of production equipment. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the oil return pipe welding equipment with clamping and positioning function provided by this utility model;

[0020] Figure 2 for Figure 1 The diagram shows the structural design of the column.

[0021] Figure 3 for Figure 1 The diagram shows the structure of the work platform.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the image

[0023] Figure 5 for Figure 3 Enlarged view of point B in the image.

[0024] Labels in the diagram: 1. Working platform; 2. Sliding groove; 3. Column; 4. Loading plate; 5. Electric push rod; 6. Plasma welding device; 7. Baffle; 8. First threaded rod; 9. First threaded block; 10. Connecting block; 11. Vertical plate; 12. First connecting block; 13. First motor; 14. Fixing plate; 15. Three-jaw chuck; 16. Rotating shaft; 17. Speed ​​regulator; 18. Second motor; 19. Sliding plate; 20. Support column; 21. Annular retaining ring; 22. Bolt; 23. Upper clamping block; 24. Upper roller; 25. Sliding rod; 26. Lower clamping block; 27. Lower roller; 28. Baffle; 29. ​​Spring; 30. Long slot; 31. Second threaded block; 32. Second connecting block; 33. Second threaded rod; 34. Third motor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0026] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0027] Please see Figures 1 to 3 A return oil pipe welding device with clamping and positioning function includes: a working platform 1, which effectively avoids vibration caused by unstable foundation during equipment operation; a sliding groove 2 is opened on the rear side of the top of the working platform 1; a column 3 is slidably connected to the inner wall of the sliding groove 2, which limits the column 3 to only moving along the extension direction of the sliding groove 2; a carrying plate 4 is installed on the top of the column 3; an electric push rod 5 is installed on the top of the carrying plate 4; a plasma welding device 6 is installed on the driving end of the electric push rod 5; the electric push rod 5 can realize the vertical lifting and lowering adjustment of the plasma welding device 6; and a baffle 7 is installed on the rear side of the inner wall of the sliding groove 2.

[0028] A drive assembly is installed inside the rear side of the work platform 1. This drive assembly serves as the power source for the sliding of the column 3, enabling lateral position adjustment of the plasma welding device 6 without manual intervention. The drive assembly includes a first threaded rod 8, the end of which is rotatably connected to the rear side of the work platform 1. A first threaded block 9 is threadedly connected to the outside of the first threaded rod 8. The rotational motion of the first threaded rod 8 is converted into linear sliding of the first threaded block 9, thus transmitting power and providing driving force for the sliding of the column 3. The outside of the first threaded block 9 is slidably connected to the rear side of the work platform 1. A connecting block 10 is installed on the rear side of the first threaded block 9, and a vertical plate is installed on the top of the connecting block 10. 11. Connecting block 10 is used to connect the first threaded block 9 and the vertical plate 11 to realize synchronous power transmission and ensure that the sliding of the first threaded block 9 can drive the vertical plate 11 to slide synchronously. The front side of the vertical plate 11 is equipped with a first connecting block 12. The side of the first connecting block 12 away from the vertical plate 11 is fixedly connected to the rear bottom end of the column 3. The outside of the first connecting block 12 is slidably connected to the inner wall of the baffle 7. The side of the working platform 1 is equipped with a first motor 13. The driving end of the first motor 13 is fixedly connected to one end of the first threaded rod 8. The first motor 13 provides power for the rotation of the first threaded rod 8, which can realize forward and reverse rotation, thereby driving the column 3 to slide back and forth to meet the positioning and resetting requirements of the plasma welding device 6.

[0029] See Figures 3 to 5 A fixed plate 14 is installed on the top right side of the working platform 1. A three-jaw chuck 15 is installed on one side of the fixed plate 14. The three-jaw chuck 15 is used to center and clamp one end of the return oil pipe, enabling quick clamping and loosening, while ensuring the coaxiality of the return oil pipe clamping and preventing eccentricity when the return oil pipe rotates. A rotating shaft 16 is installed on the inner wall of the side of the fixed plate 14 near the three-jaw chuck 15. The end of the rotating shaft 16 away from the fixed plate 14 is fixed to the side of the three-jaw chuck 15 near the fixed plate 14. The fixed plate 14 is fixedly connected to the top of the fixed plate 14. The speed regulator 17 is installed inside the top of the fixed plate 14. The speed regulator 17 can realize stepless adjustment of the rotation speed of the three-jaw chuck 15. The output end of the speed regulator 17 is fixedly connected to the end of the three-jaw chuck 15 near the fixed plate 14. The top of the fixed plate 14 is fixedly connected to the top of the fixed plate 14. The drive end of the second motor 18 is fixedly connected to the input end of the speed regulator 17, so as to realize the transmission of power from the second motor 18 to the speed regulator 17. Then, after the speed regulator 17 adjusts the speed, it drives the three-jaw chuck 15 to rotate at a uniform speed.

[0030] A sliding plate 19 is slidably connected to the top left side of the working platform 1. A support column 20 is installed at the top of the sliding plate 19, and an annular retaining ring 21 is installed at the top of the support column 20. A bolt 22 is threadedly connected to the inner wall of the top of the annular retaining ring 21. An upper clamping block 23 is rotatably connected to the bottom end of the bolt 22. The rotational motion of the bolt 22 is converted into the vertical lifting motion of the upper clamping block 23, realizing the position adjustment of the upper clamping block 23 and thus controlling the clamping force. This rotatable connection method ensures that when the bolt 22 rotates, it only drives the upper clamping block 23 to rise and fall, avoiding the upper clamping block 23 from rotating synchronously with the bolt 22. Multiple upper rollers 24 are rotatably connected inside the bottom end of the upper clamping block 23. The upper rollers 24 adopt rolling contact. The contact clamping mechanism replaces the hard-surface clamping, reducing friction between the upper clamping block 23 and the outer wall of the return oil pipe, preventing scratches on the pipe wall. It also rolls synchronously with the return oil pipe, reducing frictional resistance during rotation and ensuring smooth rotation of the return oil pipe. A sliding rod 25 is slidably connected to the inner wall of the bottom end of the annular retaining ring 21, and a lower clamping block 26 is installed at the top of the sliding rod 25. The upper clamping block 23 is smaller than the lower clamping block 26, and the outer arc of the upper clamping block 23 can contact the inner arc of the lower clamping block 26 during movement. This structure ensures that when the upper clamping block 23 moves downward, it can push the lower clamping block 26 to move downward synchronously, achieving coordinated clamping action. Multiple lower rollers 27 are rotatably connected to the inner wall of the top end of the lower clamping block 26, further reducing frictional resistance.

[0031] The elastic component includes a baffle 28, the outer side of which is slidably connected to the inner top of the support column 20. A spring 29 is installed inside the top of the support column 20, the top of which is fixedly connected to the bottom of the baffle 28. The inner top of the support column 20 provides guidance and limitation for the sliding of the baffle 28, ensuring that the baffle 28 can only slide in the vertical direction, and at the same time limiting the sliding stroke of the baffle 28. The bottom of the spring 29 is fixedly connected to one side of the inner top of the support column 20, and the bottom of the sliding rod 25 is fixedly connected to the top of the baffle 28.

[0032] An adjustment position assembly is installed inside the front side of the work platform 1. The adjustment position assembly includes a second threaded block 31, the exterior of which is slidably connected to the interior of the front side of the work platform 1. A second connecting block 32 is symmetrically installed on the top of the second threaded block 31. A second threaded rod 33 is rotatably connected to the interior of the front side of the work platform 1. A third motor 34 is installed on the other side of the work platform 1. The drive end of the third motor 34 is fixedly connected to one end of the second threaded rod 33. The exterior of the second connecting block 32 is slidably connected to the inner wall of the elongated hole 30. The elongated hole 30 provides guidance for the sliding of the second connecting block 32 and limits the sliding stroke of the second connecting block 32 to prevent the sliding plate 19 from sliding excessively and detaching from the work platform 1. Elongated holes 30 are symmetrically opened on the top of the work platform 1 to provide installation and sliding space for the second connecting block 32, ensuring a stable connection and power transmission between the adjustment position assembly and the sliding plate 19.

[0033] The working principle of the oil return pipe welding equipment with clamping and positioning function provided by this utility model is as follows:

[0034] First, the third motor 34 is started, driving the second threaded rod 33 to rotate, causing the second threaded block 31 to slide inside the front side of the working platform 1. This, in turn, causes the second connecting block 32 to slide along the inner wall of the elongated hole 30, which in turn causes the sliding plate 19 to slide at the top of the working platform 1. This achieves initial adjustment of the sliding plate 19's position, reserving suitable space for clamping the return oil pipe. This ensures that both ends of the return oil pipe can be connected to the three-jaw chuck 15 and the annular retaining ring 21, respectively. One end of the return oil pipe is placed in the clamping area of ​​the three-jaw chuck 15. The three-jaw chuck 15 clamps and fixes this end of the return oil pipe, completing the positioning and clamping of the right side of the return oil pipe. This ensures that the return oil pipe remains coaxial with the rotating shaft 16, laying the foundation for subsequent rotary welding. The other end of the return oil pipe is placed in the annular retaining ring 21. Inside, bolt 22 rotates on the inner wall of the top of the annular retaining ring 21, causing the upper clamping block 23 to move downward. During the downward movement of the upper clamping block 23, its outer arc-shaped side contacts the inner arc-shaped side of the lower clamping block 26, pushing the lower clamping block 26 to move downward. The downward movement of the lower clamping block 26 causes the sliding rod 25 to slide downward. The downward sliding of the sliding rod 25 causes the baffle 28 to slide downward inside the top of the support column 20. The baffle 28 slides downward to compress the spring 29. After the spring 29 is compressed, it generates an upward elastic force, providing an upward support force for the lower clamping block 26. The upper roller 24 and the lower roller 27 respectively contact the outer wall of the return oil pipe, realizing the elastic clamping of the left side of the return oil pipe. This ensures the clamping stability and prevents the return oil pipe from being flattened and deformed, while allowing the return oil pipe to rotate smoothly in the clamping state.

[0035] At this time, the first motor 13 is started, which drives the first threaded rod 8 to rotate, causing the first threaded block 9 to slide inside the rear side of the working platform 1. This, in turn, drives the connecting block 10 to slide. The sliding of the connecting block 10 drives the vertical plate 11 to slide. The sliding of the vertical plate 11 drives the first connecting block 12 to slide on the inner wall of the baffle 7, which in turn drives the column 3 to slide on the inner wall of the sliding groove 2. This achieves the adjustment of the position of the column 3, so that the plasma welding device 6 is aligned with the circumferential seam of the return oil pipe to be welded, ensuring that the welding arc column can act on the center of the weld. Then, the electric push rod 5 is started, which drives the plasma welding device 6 to move downward, so that the nozzle of the plasma welding device 6 is close to the circumferential seam of the return oil pipe to be welded. The appropriate welding distance is adjusted to prepare for the welding operation and welding is carried out.

[0036] During the welding process, the second motor 18 is started, and its drive end drives the input end of the speed regulator 17 to rotate. The output end of the speed regulator 17 drives the three-jaw chuck 15 to rotate. The rotation of the three-jaw chuck 15 drives the rotating shaft 16 to rotate on one side of the inner wall of the fixed plate 14, thereby driving the clamped return oil pipe to rotate at a constant speed. During the rotation of the return oil pipe, the upper roller 24 and the lower roller 27 roll synchronously with the rotation of the return oil pipe, reducing the frictional resistance during the rotation of the return oil pipe, ensuring the stability of the rotation of the return oil pipe, and avoiding uneven weld formation due to rotational vibration. As the return oil pipe rotates at a constant speed, the plasma arc continuously acts on different positions of the circumferential weld, completing the continuous welding of the 360° circumferential weld. The small amount of slag generated during the welding process falls to the corresponding area of ​​the working platform 1, without affecting the normal progress of the welding operation, while ensuring the welding... To ensure the sealing and strength of the weld, after welding is completed, the plasma welding device 6 stops working, the electric push rod 5 starts, and drives the plasma welding device 6 to move upward and reset to the initial position to avoid the welding torch colliding with the cooled weld. At the same time, it leaves space for subsequent part removal. Then, the second motor 18 stops rotating, and the three-jaw chuck 15 and the return oil pipe stop rotating synchronously. After the weld of the return oil pipe cools to a suitable temperature, the three-jaw chuck 15 releases its grip on the return oil pipe, the bolt 22 rotates in the opposite direction, driving the upper clamping block 23 to move upward. The elastic force of the spring 29 is released, pushing the baffle 28 to slide upward. The baffle 28 slides upward, driving the sliding rod 25 to slide upward. The sliding rod 25 slides upward, driving the lower clamping block 26 to move upward. The upper clamping block 23 and the lower clamping block 26 separate, releasing the clamp on the left side of the return oil pipe. The welded return oil pipe can then be removed from the equipment.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A welding device for return oil pipes with clamping and positioning function, characterized in that, include: The work platform (1) has a sliding groove (2) on the rear side of the top of the work platform (1). A column (3) is slidably connected to the inner wall of the sliding groove (2). A carrying plate (4) is installed on the top of the column (3). An electric push rod (5) is installed on the top of the carrying plate (4). A plasma welding device (6) is installed on the drive end of the electric push rod (5). A baffle (7) is installed on the rear side of the inner wall of the sliding groove (2). The drive component is installed inside the rear side of the working platform (1); A fixed plate (14) is installed on the top right side of the work platform (1). A three-jaw chuck (15) is installed on one side of the fixed plate (14). A rotating shaft (16) is installed on the inner wall of the fixed plate (14) near the three-jaw chuck (15). A speed regulator (17) is installed inside the top of the fixed plate (14). A second motor (18) is installed on the top of the fixed plate (14). A sliding plate (19) is slidably connected to the top left of the work platform (1). A support column (20) is installed at the top of the sliding plate (19). An annular retaining ring (21) is installed at the top of the support column (20). A bolt (22) is threadedly connected to the inner wall of the top of the annular retaining ring (21). An upper clamping block (23) is rotatably connected to the bottom end of the bolt (22). Multiple upper rollers (24) are rotatably connected to the bottom end of the upper clamping block (23). A sliding rod (25) is slidably connected to the inner wall of the bottom end of the annular retaining ring (21). A lower clamping block (26) is installed at the top of the sliding rod (25). Multiple lower rollers (27) are rotatably connected to the inner wall of the top of the lower clamping block (26). Elastic component, the elastic component is installed inside the top of the support column (20); The position adjustment component is installed inside the front side of the work platform (1).

2. The oil return pipe welding equipment with clamping and positioning function according to claim 1, characterized in that, The drive assembly includes a first threaded rod (8), the end of the first threaded rod (8) is rotatably connected to the rear interior of the work platform (1), the external thread of the first threaded rod (8) is connected to a first threaded block (9), a connecting block (10) is installed on the rear side of the first threaded block (9), a vertical plate (11) is installed on the top of the connecting block (10), a first connecting block (12) is installed on the front side of the vertical plate (11), and a first motor (13) is installed on one side of the work platform (1).

3. The oil return tube welding apparatus with a clamping positioning function according to claim 1, characterized by, The elastic component includes a baffle (28), the outside of which is slidably connected to the inside of the top of the support column (20), and a spring (29) is installed inside the top of the support column (20).

4. The oil return tube welding apparatus with a clamping positioning function according to claim 1, characterized by, The position adjustment component includes a second threaded block (31), the exterior of the second threaded block (31) is slidably connected to the front interior of the work platform (1), a second connecting block (32) is symmetrically installed on the top of the second threaded block (31), a second threaded rod (33) is rotatably connected to the front interior of the work platform (1), a third motor (34) is installed on the other side of the work platform (1), and elongated holes (30) are symmetrically opened on the top of the work platform (1).

5. The oil return tube welding apparatus with a clamping positioning function according to claim 1, characterized by, The end of the rotating shaft (16) away from the fixed plate (14) is fixedly connected to the side of the three-jaw chuck (15) near the fixed plate (14). The output end of the speed regulator (17) is fixedly connected to the end of the three-jaw chuck (15) near the fixed plate (14). The drive end of the second motor (18) is fixedly connected to the input end of the speed regulator (17).

6. The oil return tube welding apparatus with a clamping positioning function according to claim 1, characterized by, The upper clamping block (23) is smaller than the lower clamping block (26), and the outer arc of the upper clamping block (23) can contact the inner arc of the lower clamping block (26) when it moves.

7. The oil return tube welding apparatus with a clamping positioning function according to claim 2, characterized by, The outer side of the first threaded block (9) is slidably connected to the inner rear side of the working platform (1), the side of the first connecting block (12) away from the vertical plate (11) is fixedly connected to the bottom rear side of the column (3), the outer side of the first connecting block (12) is slidably connected to the inner wall of the baffle (7), and the driving end of the first motor (13) is fixedly connected to one end of the first threaded rod (8).

8. The oil return tube welding apparatus with a clamping positioning function according to claim 3, characterized by, The top end of the spring (29) is fixedly connected to the bottom end of the baffle (28), the bottom end of the spring (29) is fixedly connected to the inner side of the top end of the support column (20), and the bottom end of the sliding rod (25) is fixedly connected to the top end of the baffle (28).

9. The oil return tube welding apparatus with a clamping positioning function according to claim 4, characterized by, The drive end of the third motor (34) is fixedly connected to one end of the second threaded rod (33), and the outside of the second connecting block (32) is slidably connected to the inner wall of the elongated hole (30).

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