An auxiliary positioning device for multi-degree-of-freedom pipe welding

Abstract

This invention discloses an auxiliary positioning device for multi-degree-of-freedom pipe welding, comprising a processing table, a lifting assembly, an automatic clamping assembly, and a follower clamping assembly. The lifting assembly is disposed at one end of the processing table and is rotatably connected to a positioning pressure rod. A telescopic pressure rod is disposed at the bottom of the positioning pressure rod, which is used to press down and position the transverse pipe. The automatic clamping assembly is disposed on the positioning pressure rod and is used to cooperate with the positioning pressure rod to pre-clamp and fix the longitudinal pipe. As the positioning pressure rod descends, the automatic clamping assembly increases the transverse clamping force on the longitudinal pipe and applies a downward pushing force to ensure that the longitudinal pipe to be connected is smoothly and tightly connected to the transverse pipe. The follower clamping assembly is disposed on a rotating base, which is rotatably connected to the surface of the processing table. The rotation axes of the rotating base and the rotatable positioning pressure rod are collinear. This invention belongs to the field of pipe welding technology, specifically referring to an auxiliary positioning device for multi-degree-of-freedom pipe welding.

Description

Technical Field

[0001] This invention belongs to the field of pipeline welding technology, specifically referring to an auxiliary positioning device for multi-degree-of-freedom pipeline welding. Background Technology

[0002] In pipeline construction, welding is a crucial process for connecting pipes. For the butt welding of straight pipe sections, there are already a variety of mature auxiliary positioning devices available. These devices typically use clamping mechanisms to fix the two pipes to be welded on the same straight line, and drive the pipes to rotate through mechanisms such as roller frames, thereby achieving efficient circumferential welding.

[0003] However, when welding T-shaped tee pipes, it is necessary to vertically and precisely connect one longitudinal pipe to the side wall of another transverse pipe to form a T-shaped structure. After fixing both, welding can be carried out. However, ordinary pipe positioning devices can only perform single-degree-of-freedom transverse adjustment. For welding vertical tee pipes, they cannot effectively fix and clamp them. In actual operation, it is common to rely on manual hand-holding or the use of simple tooling to temporarily fix the longitudinal pipe. Not only is it difficult to guarantee positioning accuracy, misalignment and skew are prone to occur, resulting in a decrease in welding quality, but the position also needs to be constantly adjusted to adapt to this structure during the welding process, resulting in low overall efficiency and inconvenience in operation. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an auxiliary positioning device for multi-degree-of-freedom pipe welding, which effectively solves the above problems.

[0005] The technical solution adopted by this invention is as follows: This invention proposes an auxiliary positioning device for multi-degree-of-freedom pipe welding, including a processing table, a lifting assembly, an automatic clamping assembly, and a follower clamping assembly. The lifting assembly is located at one end of the processing table and is rotatably connected to a positioning pressure rod. A telescopic pressure rod is located at the bottom of the positioning pressure rod. The positioning pressure rod is used to press down and position the transverse pipe. The automatic clamping assembly is located on the positioning pressure rod and is used to cooperate with the positioning pressure rod to pre-clamp and fix the longitudinal pipe. As the positioning pressure rod descends, it increases the transverse clamping force on the longitudinal pipe and applies a downward thrust to ensure that the longitudinal pipe to be connected is smoothly and tightly connected to the transverse pipe. The follower clamping assembly is located on a rotating base and is rotatably connected to the surface of the processing table. The follower clamping assembly is used to pre-clamp the transverse pipe to be processed and cooperate with the positioning pressure rod for further clamping and positioning. The rotation axes of the rotating base and the rotatable positioning pressure rod are collinear, which can realize that the automatic clamping assembly and the follower clamping assembly can synchronously rotate the connected longitudinal pipe and transverse pipe as a whole to facilitate welding of their joints.

[0006] Furthermore, the lifting assembly includes a drive motor, a lead screw, a lifting plate, and a mounting frame. The mounting frame is fixedly mounted on one end of the processing table. The lead screw is rotatably mounted on the mounting frame, with one end connected to the output end of the drive motor. The drive motor is fixedly mounted on the top of the mounting frame. The lifting plate is vertically mounted above the rotating base. One end of the lifting plate is connected to a lifting part, which is threadedly connected to the lead screw and slidably connected to the mounting frame. The lower surface of the other end of the lifting plate is rotatably connected to the top of the positioning pressure rod.

[0007] Furthermore, the automatic clamping assembly includes a first driving component, a second driving component, and an unfolding clamping assembly. The first driving component and the second driving component are movably disposed on the positioning pressure rod. The unfolding clamping assembly is disposed around the positioning pressure rod. The two ends of the unfolding clamping assembly are respectively connected to the first driving component and the second driving component. The first driving component and the second driving component control the unfolding and folding of the unfolding clamping assembly through relative movement.

[0008] Furthermore, the first driving component includes a first pressure plate, a first connecting rod, and a first extrusion slider. The first pressure plate and the first extrusion slider are slidably sleeved on the positioning pressure rod. A first docking plate is provided on the top of the first extrusion slider. The first connecting rod is arranged around the positioning pressure rod. The first docking plate is fixedly connected to the first pressure plate through the first connecting rod. A first return spring is provided at the bottom of the first extrusion slider. The two ends of the first return spring abut against the bottom of the first extrusion slider and the positioning pressure rod, respectively.

[0009] Furthermore, the second driving component includes a second pressure plate, a second extrusion slider, and a second connecting rod. The second pressure plate is located below the first pressure plate, and the second extrusion slider is located between the second pressure plate and the first extrusion slider. Both the second pressure plate and the second extrusion slider are slidably sleeved on the positioning pressure rod. A second mating plate is provided on the top of the second extrusion slider. The second mating plate and the second pressure plate are fixedly connected by the second connecting rod. Both the second mating plate and the second pressure plate are movably penetrated by the first connecting rod. A limiting protrusion is provided on the surface of the positioning pressure rod located on the lower surface of the second pressure plate. The limiting protrusion movably abuts against the lower surface of the second pressure plate. A second return spring is provided between the limiting protrusion and the second mating plate. The second return spring is sleeved on the positioning pressure rod, and both ends of the second return spring abut against the limiting protrusion and the second mating plate, respectively.

[0010] Furthermore, multiple sets of unfolding clamping components are arranged around the positioning pressure rod. Each set of unfolding clamping components includes an upper connecting rod, a lower connecting rod, and a pressing part. There are two lower connecting rods arranged parallel to each other. One end of the lower connecting rod is rotatably connected to one side of the pressing part, and its other end is rotatably connected to the side wall of the first pressing slider that is diagonally lower. One end of the upper connecting rod is rotatably connected to the top of one side of the pressing part, and its other end is rotatably connected to the side wall of the second pressing slider that is diagonally upper.

[0011] Furthermore, one end of the telescopic pressure rod is slidably positioned inside the positioning pressure rod, and the other end is connected to a positioning pressure plate. A third return spring is sleeved on the telescopic pressure rod. One end of the third return spring abuts against the bottom of the positioning pressure rod, and the other end abuts against the positioning pressure plate. A positioning rubber block with anti-slip texture is bonded to the lower surface of the positioning pressure plate.

[0012] Furthermore, the follow-up clamping assembly includes a workpiece bearing plate and a clamping mechanism. The workpiece bearing plate is centrally located on the upper surface of the rotating base. Limiting guide rods are provided at the bottom of both ends of the workpiece bearing plate. The limiting guide rods movably pass through the rotating base. A fourth return spring is sleeved on the limiting guide rod. One end of the fourth return spring abuts against the upper surface of the rotating base, and the other end abuts against the lower surface of the workpiece bearing plate. There are two sets of clamping mechanisms symmetrically arranged at both ends of the workpiece bearing plate. Each set of clamping mechanisms consists of two clamping mechanisms symmetrically distributed on both sides of the workpiece bearing plate at its respective end. The clamping mechanism includes a linkage push plate, a clamping swing arm, a connecting seat, and a workpiece clamping plate. One end of the linkage push plate is rotatably connected to the side wall of the workpiece bearing plate, and the other end of the linkage push plate is rotatably connected to the middle of the clamping swing arm. One end of the clamping swing arm is rotatably connected to the connecting seat, and the other end of the clamping swing arm is rotatably connected to the workpiece clamping plate. The connecting seat is fixedly located on the surface of the rotating base. The clamping surface of the workpiece clamping plate is provided with two symmetrically distributed clamping rollers.

[0013] Furthermore, the upper surface of the workpiece support plate is provided with an arc-shaped support part, and the arc-shaped support part has a smoothed concave arc surface.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows:

[0015] 1. The automatic clamping assembly can pre-clamp or release the longitudinal pipe to be docked by manually squeezing the first and second pressure plates. During the docking process, the automatic clamping assembly and the positioning pressure rod can work together to increase the lateral clamping force on the longitudinal pipe and apply a downward thrust during the descent. This effectively achieves a smooth and tight docking of the longitudinal pipe with the lateral pipe, effectively overcoming the misalignment and skew problems that exist in manual hand positioning, and ensuring docking accuracy and welding quality from the source.

[0016] 2. The follow-up clamping assembly set on the rotating base allows the transverse pipe to be docked to press down the workpiece bearing plate under its own weight, and the clamping swing arms on both sides drive the workpiece clamping plate to pre-clamp the workpiece. In the subsequent docking process, the follow-up clamping assembly further increases the clamping force on the transverse pipe through the indirect pressure of the positioning pressure rod, so as to ensure the stability of the docking process.

[0017] 3. During the descent of the positioning pressure rod, before the telescopic pressure rod contacts the bottom of the transverse pipe, the transverse pipe can be finely adjusted by rolling with the help of the clamping rollers on the workpiece clamping plate. At this time, the longitudinal pipe can also rotate, driving the automatic clamping component movably sleeved on the positioning pressure rod to rotate and finely adjust, thereby increasing the flexibility of operation and realizing multiple degrees of freedom adjustment between the docking pipes, until the positioning pressure plate at the bottom of the telescopic pressure rod presses against the bottom surface of the transverse pipe to fix it. The positioning pressure rod applies longitudinal elastic pressure to the automatic clamping component through the second return spring to ensure its stability, so that the pipes will not easily move after calibration, ensuring docking accuracy.

[0018] 4. The rotating base and positioning rod are coaxially designed, allowing the entire T-shaped pipe to rotate synchronously as a whole after being connected and fixed. Welders no longer need to constantly move and adjust their position around the workpiece; they can complete continuous and uniform welding of the entire joint from a fixed position, greatly reducing the difficulty of operation and labor intensity, and significantly improving welding efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention;

[0020] Figure 2 This is a schematic diagram of the automatic clamping component of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention;

[0021] Figure 3 This is a schematic diagram of the positioning pressure rod of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention;

[0022] Figure 4 This is a schematic diagram of the structure of the first driving component of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention;

[0023] Figure 5 This is a schematic diagram of the structure of the second driving component of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention;

[0024] Figure 6 This is a schematic diagram of the follower clamping assembly of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention;

[0025] Figure 7 This is a schematic diagram of the main view of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention.

[0026] Figure 8 This is a reference diagram showing the usage status of an auxiliary positioning device for multi-degree-of-freedom pipe welding proposed in this invention.

[0027] The components include: 1. Processing table; 2. Lifting assembly; 3. Positioning pressure rod; 4. Automatic clamping assembly; 5. Follow-up clamping assembly; 6. Rotating base; 7. Mounting bracket; 8. Drive motor; 9. Lead screw; 10. Lifting part; 11. Lifting plate; 12. First driving component; 13. Second driving component; 14. Unfolding clamping assembly; 15. Telescopic pressure rod; 16. Positioning pressure plate; 17. Third return spring; 18. First pressure plate; 19. First connecting rod; 20. First extrusion slider; 21. First docking point. 21. Plate; 22. Second pressure plate; 23. Second connecting rod; 24. Second extrusion slider; 25. Second docking plate; 26. Upper connecting rod; 27. Extrusion part; 28. Lower connecting rod; 29. ​​Limiting protrusion; 30. First return spring; 31. Second return spring; 32. Workpiece bearing plate; 33. Arc-shaped bearing part; 34. Limiting guide rod; 35. Fourth return spring; 36. Linkage push plate; 37. Connecting seat; 38. Clamping swing arm; 39. Workpiece clamping plate; 40. Clamping roller; 41. Clamping mechanism.

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] like Figures 1-8As shown, this invention proposes an auxiliary positioning device for multi-degree-of-freedom pipe welding, including a processing table 1, a lifting assembly 2, an automatic clamping assembly 4, and a follow-up clamping assembly 5. The lifting assembly 2 is disposed at one end of the processing table 1, and a positioning pressure rod 3 is rotatably connected to the lifting assembly 2. A telescopic pressure rod 15 is disposed at the bottom of the positioning pressure rod 3. The positioning pressure rod 3 is used to press down and position the transverse pipe. The automatic clamping assembly 4 is disposed on the positioning pressure rod 3. The automatic clamping assembly 4 is used to cooperate with the positioning pressure rod 3 to pre-clamp and fix the longitudinal pipe, and increases the transverse clamping force on the longitudinal pipe as the positioning pressure rod 3 descends. A downward thrust is applied to ensure that the longitudinal pipe to be connected is smoothly and tightly connected to the transverse pipe. The follower clamping component 5 is set on the rotating base 6, which is rotatably connected to the surface of the processing table 1. The follower clamping component 5 is used to pre-clamp the transverse pipe to be processed and cooperate with the positioning pressure rod 3 for clamping and positioning in one embodiment of the present invention. The rotation axes of the rotating base 6 and the rotatable positioning pressure rod 3 are collinear, which can realize that the automatic clamping component 4 and the follower clamping component 5 can synchronously rotate the connected longitudinal pipe and transverse pipe as a whole to facilitate welding of their joint.

[0032] In one embodiment of the present invention, the lifting assembly 2 includes a drive motor 8, a lead screw 9, a lifting plate 11, and a mounting frame 7. The mounting frame 7 is fixedly disposed at one end of the processing table 1. The lead screw 9 is rotatably disposed on the mounting frame 7. One end of the lead screw 9 is connected to the output end of the drive motor 8. The drive motor 8 is fixedly disposed at the top of the mounting frame 7. The lifting plate 11 is vertically disposed above the rotating base 6. One end of the lifting plate 11 is connected to a lifting part 10. The lifting part 10 is threadedly connected to the lead screw 9 and is slidably connected to the mounting frame 7. The lower surface of the other end of the lifting plate 11 is rotatably connected to the top of the positioning pressure rod 3.

[0033] In one embodiment of the present invention, the automatic clamping assembly 4 includes a first driving component 12, a second driving component 13, and an unfolding clamping assembly 14. The first driving component 12 and the second driving component 13 are movably disposed on the positioning pressure rod 3. The unfolding clamping assembly 14 is disposed around the positioning pressure rod 3. The two ends of the unfolding clamping assembly 14 are respectively connected to the first driving component 12 and the second driving component 13. The first driving component 12 and the second driving component 13 control the unfolding and folding of the unfolding clamping assembly 14 through relative movement.

[0034] In one embodiment of the present invention, the first driving component 12 includes a first pressure plate 18, a first connecting rod 19, and a first pressing slider 20. The first pressure plate 18 and the first pressing slider 20 are slidably sleeved on the positioning pressure rod 3. A first docking plate 21 is provided at the top of the first pressing slider 20. The first connecting rod 19 is arranged around the positioning pressure rod 3. The first docking plate 21 is fixedly connected to the first pressure plate 18 through the first connecting rod 19. A first return spring 30 is provided at the bottom of the first pressing slider 20. The two ends of the first return spring 30 abut against the bottom of the first pressing slider 20 and the positioning pressure rod 3, respectively.

[0035] In one embodiment of the present invention, the second driving component 13 includes a second pressure plate 22, a second extrusion slider 24, and a second connecting rod 23. The second pressure plate 22 is disposed below the first pressure plate 18, and the second extrusion slider 24 is disposed between the second pressure plate 22 and the first extrusion slider 20. Both the second pressure plate 22 and the second extrusion slider 24 are slidably sleeved on the positioning pressure rod 3. A second docking plate 25 is disposed on the top of the second extrusion slider 24. The second docking plate 25 and the second pressure plate 22 are fixedly connected by the second connecting rod 23. Both the second docking plate 25 and the second pressure plate 22 are movably penetrated by the first connecting rod 19. A limiting protrusion 29 is disposed on the surface of the positioning pressure rod 3 located on the lower surface of the second pressure plate 22. The limiting protrusion 29 movably abuts against the lower surface of the second pressure plate 22. A second return spring 31 is disposed between the limiting protrusion 29 and the second docking plate 25. The second return spring 31 is sleeved on the positioning pressure rod 3, and both ends of the second return spring 31 abut against the limiting protrusion 29 and the second docking plate 25, respectively.

[0036] In one embodiment of the present invention, multiple sets of unfolding clamping components 14 are arranged around the positioning pressure rod 3. Each set of unfolding clamping components 14 includes an upper connecting rod 26, a lower connecting rod 28, and a pressing part 27. Two lower connecting rods 28 are arranged parallel to each other vertically. One end of the lower connecting rod 28 is rotatably connected to one side of the pressing part 27, and the other end is rotatably connected to the side wall of the first pressing slider 20 at an angle downward. One end of the upper connecting rod 26 is rotatably connected to the top of one side of the pressing part 27, and the other end is rotatably connected to the side wall of the second pressing slider 24 at an angle upward.

[0037] In one embodiment of the present invention, one end of the telescopic pressure rod 15 is slidably disposed within the positioning pressure rod 3 and the other end is connected to the positioning pressure plate 16. A third return spring 17 is sleeved on the telescopic pressure rod 15. One end of the third return spring 17 abuts against the bottom of the positioning pressure rod 3 and the other end abuts against the positioning pressure plate 16. A positioning rubber block with anti-slip texture is bonded to the lower surface of the positioning pressure plate 16.

[0038] In one embodiment of the present invention, the follower clamping assembly 5 includes a workpiece bearing plate 32 and a clamping mechanism 41. The workpiece bearing plate 32 is centrally located on the upper surface of the rotating base 6. Limiting guide rods 34 are provided at the bottom of both ends of the workpiece bearing plate 32. The limiting guide rods 34 movably pass through the rotating base 6. A fourth return spring 35 is sleeved on the limiting guide rod 34. One end of the fourth return spring 35 abuts against the upper surface of the rotating base 6 and the other end abuts against the lower surface of the workpiece bearing plate 32. Two sets of clamping mechanisms 41 are provided and symmetrically arranged at both ends of the workpiece bearing plate 32. Each set of clamping mechanisms 41 has two pairs of clamping mechanisms. The clamping mechanism 41 is composed of two clamping mechanisms distributed on both sides of the workpiece bearing plate 32 at the end. The clamping mechanism 41 includes a linkage push plate 36, a clamping swing arm 38, a connecting seat 37, and a workpiece clamping plate 39. One end of the linkage push plate 36 is rotatably connected to the side wall of the workpiece bearing plate 32, and the other end of the linkage push plate 36 is rotatably connected to the middle of the clamping swing arm 38. One end of the clamping swing arm 38 is rotatably connected to the connecting seat 37, and the other end of the clamping swing arm 38 is rotatably connected to the workpiece clamping plate 39. The connecting seat 37 is fixedly set on the surface of the rotating base 6. The clamping surface of the workpiece clamping plate 39 is provided with two symmetrically distributed clamping rollers 40.

[0039] In one embodiment of the present invention, the upper surface of the workpiece support plate 32 is provided with an arc-shaped support portion 33, and the arc-shaped support portion 33 has a smoothed concave arc surface.

[0040] Working principle: When using the auxiliary positioning device for multi-degree-of-freedom pipe welding of the present invention to butt weld T-shaped pipes, the operator first places the transverse pipe to be welded on the arc-shaped bearing part 33 on the workpiece bearing plate 32. The weight of the transverse pipe presses down on the workpiece bearing plate 32, causing it to overcome the elastic force of the fourth return spring 35 and move down. Through the linkage push plate 36, the clamping swing arm 38 is pulled to drive the workpiece clamping plate 39 and its clamping rollers 40 to close and clamp, thereby realizing the automatic pre-clamping of the transverse pipe. Subsequently, the longitudinal pipe is placed on the automatic clamping assembly 4. At this time, the operator can manually squeeze the first pressure plate 18 and the second pressure plate 22 simultaneously to bring them closer together. The first compression slider 20 and the second compression slider 24 are driven by the first connecting rod 19 and the second connecting rod 23 to move towards each other against the force of the first return spring 30 and the second return spring 31. Thus, the compression part 27 arranged around the pipe is synchronously contracted inward through the multiple sets of upper connecting rods 26 and lower connecting rods 28. After the longitudinal pipe is placed on it, the first pressure plate 18 and the second pressure plate 22 are released to allow the automatic clamping assembly 4 to elastically reset and unfold. At this time, the compression part 27 arranged around the pipe unfolds to clamp the inner wall of the longitudinal pipe to achieve the initial installation.

[0041] After completing the above preliminary settings, the operator starts the drive motor 8 of the lifting assembly 2 through the controller, causing the drive screw 9 to rotate and drive the lifting plate 11 connected through the lifting part 10 to descend as a whole. This causes the positioning pressure rod 3, which is rotatably connected to the lifting plate 11, to move down. This descent process triggers two core automatic coordinated actions:

[0042] First, the dynamic locking and downward pushing of the longitudinal pipe: The telescopic pressure rod 15 and positioning plate 16, located at the bottom of the positioning pressure rod 3, first contact the transverse pipe. As the positioning pressure rod 3 continues to press down, the limiting protrusion 29 applies pressure to the second docking plate 25 via the second return spring 31, thereby bringing the first extrusion slider 20 and the second extrusion slider 24 closer together. Through the action of multiple sets of upper connecting rods 26 and lower connecting rods 28, all extrusion parts 27 are driven to synchronously expand radially outward, significantly enhancing the clamping force on the longitudinal pipe. Simultaneously, the entire automatic clamping assembly 4, driven by the positioning pressure rod 3, applies a continuous downward axial thrust to the longitudinal pipe, ensuring that its end face is smoothly and tightly pressed against the docking surface of the transverse pipe.

[0043] Second, the linkage pressure locking of the transverse pipe: The downward pressure applied to the transverse pipe by the positioning pressure rod 3 through the telescopic pressure rod 15 and the positioning pressure plate 16 is transmitted in the opposite direction to the workpiece bearing plate 32. This force causes the workpiece bearing plate 32 to move further down, which in turn pulls the clamping swing arm 38 more significantly through the linkage push plates 36 on both sides, so that the workpiece clamping plate 39 and its clamping rollers 40 clamp the transverse pipe with a greater clamping force, forming a dynamic force-increasing locking mechanism that is linked to the downward pressing action of the positioning pressure rod 3.

[0044] In one embodiment of the present invention, during the initial stage of the descent of the positioning pressure rod 3, when the positioning pressure plate 16 at the end of the telescopic pressure rod 15 has not yet contacted the inner bottom surface of the transverse pipe, the transverse pipe is in a fine-tunable state. At this time, the transverse pipe can be finely adjusted laterally by rolling under the support of the clamping rollers 40 distributed on the workpiece clamping plate 39; at the same time, the longitudinal pipe can also drive the entire automatic clamping assembly 4 to rotate and finely adjust around the axis of the positioning pressure rod 3. This design realizes flexible adjustment of multiple degrees of freedom during the docking process, ensuring precise alignment during docking.

[0045] When the positioning plate 16 finally and completely presses the inner bottom surface of the transverse pipe, the third return spring 17 is compressed, and the system enters the final locked state. At this time, under the continuous elastic action of the first return spring 30 and the second return spring 31, the automatic clamping assembly 4 maintains stable clamping of the longitudinal pipe. Since the rotating base 6 and the positioning pressure rod 3 are designed with their rotation axes collinear, during welding, the rotating base 6 can be driven to rotate, causing the transverse pipe fixed by the follower clamping assembly 5 and the longitudinal pipe fixed by the automatic clamping assembly 4 to rotate synchronously as a whole. The welder can conveniently complete the continuous and uniform welding of the entire circumferential joint at a fixed position without moving, greatly improving welding quality and work efficiency.

[0046] In summary, the auxiliary positioning device for multi-degree-of-freedom pipe welding of the present invention features an automatic clamping component that can pre-clamp or release the longitudinal pipe to be welded by manually pressing the first and second pressure plates. During the welding process, the automatic clamping component and the positioning pressure rod work together to increase the lateral clamping force on the longitudinal pipe and apply a downward thrust during descent, effectively achieving a smooth and tight weld between the longitudinal pipe and the transverse pipe. This effectively overcomes the misalignment and skew problems associated with manual hand positioning, ensuring welding accuracy and welding quality from the source. The follow-up clamping component, mounted on a rotating base, causes the transverse pipe to be welded to press down the workpiece bearing plate under its own weight, and the clamping arms on both sides drive the workpiece clamping plate to pre-clamp the workpiece. Furthermore, during the subsequent welding process, the indirect pressure from the positioning pressure rod further increases the clamping force of the follow-up clamping component on the transverse pipe, ensuring stability during the welding process. During the descent of the positioning pressure rod, before the telescopic pressure rod contacts the bottom of the transverse pipe, the transverse pipe can be finely adjusted by rolling with the help of the clamping rollers on the workpiece clamping plate. At this time, the longitudinal pipe can also rotate, driving the automatic clamping component movably sleeved on the positioning pressure rod to rotate and finely adjust, increasing the flexibility of operation and enabling multiple degrees of freedom adjustment between the docking pipes, until the positioning pressure plate at the bottom of the telescopic pressure rod presses against the bottom surface of the transverse pipe to fix it. The positioning pressure rod applies longitudinal elastic pressure to the automatic clamping component through the second return spring to ensure its stability, so that the pipes will not easily move after calibration, ensuring docking accuracy. The rotating base and the positioning pressure rod adopt a coaxial design, so that the entire T-shaped pipe can rotate synchronously as a whole after docking and fixing. Welders no longer need to move and adjust their position around the workpiece; they can complete continuous and uniform welding of the entire joint from a fixed position, greatly reducing the difficulty of operation and labor intensity, and significantly improving welding efficiency.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

[0049] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-degree of freedom auxiliary positioning device for pipe welding, characterized by: Including processing platform (1), lifting assembly (2), automatic clamping assembly (4) and follow-up clamping assembly (5); The lifting assembly (2) is arranged at one end of the processing platform (1), the lifting assembly (2) is rotatably connected with the positioning pressure rod (3), the bottom of the positioning pressure rod (3) is provided with the telescopic pressure rod (15), and the positioning pressure rod (3) is used for positioning and pressing the horizontal pipeline downward; The automatic clamping assembly (4) is arranged on the positioning pressure rod (3), and the automatic clamping assembly (4) is used for pre-clamping and fixing the longitudinal pipeline in cooperation with the positioning pressure rod (3), and increasing the transverse clamping force and applying downward thrust to the longitudinal pipeline along with the descending of the positioning pressure rod (3), so as to ensure that the to-be-connected longitudinal pipeline is stably and tightly connected with the horizontal pipeline; The follow-up clamping assembly (5) is arranged on the rotating base (6), the rotating base (6) is rotatably connected with the surface of the processing platform (1), and the follow-up clamping assembly (5) is used for pre-clamping the to-be-processed horizontal pipeline and further clamping and positioning in cooperation with the positioning pressure rod (3); The rotating base (6) and the rotating shaft of the rotatable positioning pressure rod (3) are arranged in line, so that the automatic clamping assembly (4) and the follow-up clamping assembly (5) can synchronously rotate the connected longitudinal pipeline and horizontal pipeline as a whole, so as to facilitate the welding of the splicing joint; The automatic clamping assembly (4) comprises a first driving part (12), a second driving part (13) and an unfolding clamping assembly (14); The first driving part (12) and the second driving part (13) are movably arranged on the positioning pressure rod (3), and the unfolding clamping assembly (14) is arranged around the positioning pressure rod (3), the two ends of the unfolding clamping assembly (14) are connected with the first driving part (12) and the second driving part (13) respectively, and the first driving part (12) and the second driving part (13) control the unfolding and folding of the unfolding clamping assembly (14) through relative movement; The first driving part (12) comprises a first pressing plate (18), a first connecting rod (19) and a first extrusion sliding block (20), the first pressing plate (18) and the first extrusion sliding block (20) are slidably sleeved on the positioning pressure rod (3), the first extrusion sliding block (20) is provided with a first butt joint plate (21) at the top, the first connecting rod (19) is arranged around the positioning pressure rod (3), the first butt joint plate (21) is fixedly connected with the first pressing plate (18) through the first connecting rod (19), and the first extrusion sliding block (20) is provided with a first reset spring (30) at the bottom, and the two ends of the first reset spring (30) are respectively abutted with the first extrusion sliding block (20) and the bottom of the positioning pressure rod (3). The second driving component (13) comprises a second pressing plate (22), a second extrusion sliding block (24) and a second connecting rod (23), the second pressing plate (22) is arranged below the first pressing plate (18), the second extrusion sliding block (24) is arranged between the second pressing plate (22) and the first extrusion sliding block (20), the second pressing plate (22) and the second extrusion sliding block (24) are both slidingly sleeved on the positioning pressing rod (3), the top of the second extrusion sliding block (24) is provided with a second butt joint plate (25), the second butt joint plate (25) and the second pressing plate (22) are fixedly connected through the second connecting rod (23), and the second butt joint plate (25) and the second pressing plate (22) are both movably penetrated by the first connecting rod (19).

2. The multi-degree of freedom auxiliary positioning device for pipe welding according to claim 1, characterized in that: The lifting assembly (2) comprises a driving motor (8), a lead screw (9), a lifting plate (11) and a mounting frame (7), the mounting frame (7) is fixedly arranged at one end of the machining table (1), the lead screw (9) is rotatably arranged on the mounting frame (7), one end of the lead screw (9) is connected with the output end of the driving motor (8), the driving motor (8) is fixedly arranged on the top of the mounting frame (7), the lifting plate (11) is arranged above the rotating base (6) in a lifting mode, one end of the lifting plate (11) is connected with a lifting part (10), the lifting part (10) is threadedly connected with the lead screw (9) and is in a limiting sliding connection with the mounting frame (7), and the other end of the lifting plate (11) is in a rotating connection with the top of the positioning pressing rod (3).

3. The multi-degree of freedom auxiliary positioning device for pipe welding according to claim 2, characterized in that: The positioning pressing rod (3) arranged on the lower surface of the second pressing plate (22) is provided with a limiting protrusion (29), the limiting protrusion (29) movably abuts against the lower surface of the second pressing plate (22), a second reset spring (31) is arranged between the limiting protrusion (29) and the second butt joint plate (25), the second reset spring (31) is sleeved on the positioning pressing rod (3), and the two ends of the second reset spring (31) respectively abut against the limiting protrusion (29) and the second butt joint plate (25).

4. The multi-degree of freedom auxiliary positioning device for pipe welding according to claim 3, characterized in that: A plurality of groups of the unfolding clamping assemblies (14) are arranged around the positioning pressing rod (3), each group of the unfolding clamping assemblies (14) comprises an upper connecting rod (26), a lower connecting rod (28) and an extrusion part (27), two lower connecting rods (28) are arranged in parallel, one end of the lower connecting rod (28) is rotatably connected with one side of the extrusion part (27), the other end of the lower connecting rod (28) is rotatably connected with the side wall of the obliquely lower first extrusion sliding block (20), one end of the upper connecting rod (26) is rotatably connected with the top of one side of the extrusion part (27), and the other end of the upper connecting rod (26) is rotatably connected with the side wall of the obliquely upper second extrusion sliding block (24).

5. A multi-degree of freedom auxiliary positioning device for pipe welding according to claim 4, characterized in that: One end of the telescopic pressing rod (15) is arranged in the positioning pressing rod (3) in a limiting sliding mode, the other end of the telescopic pressing rod (15) is connected with a positioning pressing plate (16), a third reset spring (17) is sleeved on the telescopic pressing rod (15), one end of the third reset spring (17) abuts against the bottom of the positioning pressing rod (3), the other end of the third reset spring (17) abuts against the positioning pressing plate (16), and the lower surface of the positioning pressing plate (16) is bonded with a positioning rubber block provided with anti-skid lines.

6. A multi-degree of freedom auxiliary positioning device for pipe welding according to claim 5, characterized in that: The follow-up clamping assembly (5) comprises a workpiece bearing plate (32) and a clamping mechanism (41); The workpiece bearing plate (32) is centrally arranged on the upper surface of the rotating base (6), the bottom of the two ends of the workpiece bearing plate (32) is provided with a limiting guide rod (34), the limiting guide rod (34) movably penetrates the rotating base (6), a fourth reset spring (35) is sleeved on the limiting guide rod (34), one end of the fourth reset spring (35) abuts against the upper surface of the rotating base (6) and the other end abuts against the lower surface of the workpiece bearing plate (32); The clamping mechanism (41) is provided with two groups and is symmetrically arranged at the two ends of the workpiece bearing plate (32), each group of the clamping mechanism (41) comprises two clamping mechanisms (41) symmetrically distributed on the two sides of the workpiece bearing plate (32) at the end, the clamping mechanism (41) comprises a linkage push plate (36), a clamping swing arm (38), a connecting seat (37) and a workpiece clamping plate (39); One end of the linkage push plate (36) is rotationally connected with the side wall of the workpiece bearing plate (32), the other end of the linkage push plate (36) is rotationally connected with the middle part of the clamping swing arm (38); One end of the clamping swing arm (38) is rotationally connected with the connecting seat (37), the other end of the clamping swing arm (38) is rotationally connected with the workpiece clamping plate (39); The connecting seat (37) is fixedly arranged on the surface of the rotating base (6); The clamping surface of the workpiece clamping plate (39) is provided with two symmetrically distributed clamping rollers (40).

7. A multi-degree of freedom auxiliary positioning device for pipe welding according to claim 6, characterized in that: The upper surface of the workpiece bearing plate (32) is provided with an arc surface bearing part (33), the arc surface bearing part (33) is provided with a concave arc surface subjected to smoothing treatment.

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