Rotary position-changing tool for low-pressure pipe welding

Abstract

The utility model discloses a kind of rotary displacement tool for low-pressure pipe welding, including fixed seat and turnover frame, the top end of the fixed seat swing installation has turnover frame, the top end of the turnover frame swing installation has rotary disc, the top end of the rotary disc is installed with three sets of chuck, the outside of three sets of chuck of the rotary disc top is provided with fixed frame, the top end of the fixed frame is installed with limit frame, the top end of the fixed frame of limit frame side installation has connecting seat, the top end of the fixed frame of connecting seat side is symmetrically installed with locating seat, the top end of the limit frame is slidably installed with adjusting plate. The utility model not only realizes that rotary displacement tool is convenient to the multistage fixed position of low-pressure pipe, facilitate to adapt to different size low-pressure pipe, facilitate that rotary displacement tool is convenient to the circumferential type rotation adjustment of low-pressure pipe welding position, and facilitate that the position of low-pressure pipe welding of inclined position adjustment, increase the range of low-pressure pipe welding.

Description

Technical Field

[0001] This utility model relates to the field of rotary positioning tooling technology, specifically a rotary positioning tooling for low-pressure pipe welding. Background Technology

[0002] Rotary positioning fixtures for low-pressure pipe welding are mechanical devices used to assist in welding. They are primarily used to adjust the weld position by rotating the workpiece and are suitable for special welding scenarios such as pipe flanges and bends. This fixture achieves precise workpiece positioning and rotation through the coordinated operation of a roller rotation mechanism, a lifting mechanism, and a tilting mechanism. For example, when welding pipe flanges, bends, or workpieces of different diameters, the mechanical device adjusts the workpiece angle to place the weld in the optimal welding position.

[0003] As disclosed in CN216541651U, a rotary positioning fixture and welding workstation include a support and a rolling support mechanism. The workpiece is placed in the receiving space between the rolling elements, where rolling friction exists between the workpiece and the rolling elements. A small force is applied manually to rotate the workpiece, moving the area to be welded to the bottom of the workpiece for welding, preventing molten metal from flowing when welding at higher positions. After welding one area, the workpiece is rotated again to switch the welding position to the bottom surface of the workpiece for further welding.

[0004] Although it enables the workpiece to be rotated and repositioned by manual force, there is no need to use a gantry crane for hoisting and repositioning during the welding process, which saves time and effort, has high welding efficiency, and high safety in the welding process; the rotary repositioning fixture is flexible and convenient to use; the rotary repositioning device can be applied to the welding of different sizes of products in the same series, and the repositioning device has a wide range of applications. For products of different sizes, there is no need to design different rotary repositioning devices, which saves the cost of repositioning devices.

[0005] However, this does not solve the problem that existing rotary positioning fixtures are generally not conducive to convenient multi-level fixed positioning of low-pressure pipes, are not easy to adapt to low-pressure pipes of different sizes, and are not convenient for convenient circumferential rotation adjustment of the welding position of low-pressure pipes, thus affecting the range and efficiency of low-pressure pipe welding. Summary of the Invention

[0006] The purpose of this utility model is to provide a rotary positioning tool for low-pressure pipe welding, so as to solve the problems mentioned in the background art that the rotary positioning tool is not convenient for multi-level fixed positioning of low-pressure pipe, not convenient for adapting to low-pressure pipes of different sizes, and not convenient for the rotary positioning tool to conveniently adjust the welding position of low-pressure pipe by circular rotation, which affects the range and efficiency of low-pressure pipe welding.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rotary positioning fixture for low-pressure pipe welding, comprising a fixed base and a flipping frame. The flipping frame is movably mounted on the top of the fixed base, and a rotating disk is movably mounted on the top of the flipping frame. An electric three-jaw chuck is mounted on the top of the rotating disk. A fixed frame is provided outside the electric three-jaw chuck above the rotating disk. A limit frame is mounted on the top of the fixed frame. A connecting seat is mounted on the top of the fixed frame on one side of the limit frame. Positioning seats are symmetrically mounted on the top of the fixed frame on one side of the connecting seat. An adjusting plate is slidably mounted on the top of the limit frame, extending beyond the limit frame. Fixing bolts are symmetrically mounted on the top of the limit frame above the adjusting plate, extending to the surface of the adjusting plate. A positioning hole is provided on the top of the fixed frame below the adjusting plate. The connecting seat... A support base is installed at the top, and a pull arm is movably installed on the outer wall of the support base. A hinge shaft is installed on the outer wall of the support base on one side of the pull arm, and the pull arm is movably connected to the support base via the hinge shaft. A hinge block is movably installed on the outer wall of the pull arm. A drive shaft is installed on the outer wall of the hinge block near the pull arm, and the pull arm is movably connected to the hinge block via the drive shaft. A drive arm is movably installed at the bottom end of the hinge block. A limit shaft is installed on the outer wall of the drive arm near the hinge block, and the drive arm is movably connected to the hinge block via the limit shaft. A flip shaft is installed on the outer wall of the drive arm near the support base, and the drive arm is movably connected to the support base via the flip shaft. A clamping block is provided inside the drive arm, and the clamping block extends to the outside of the drive arm. A mounting sleeve is fitted on the surface of the clamping block, and the mounting sleeve is connected to the drive arm.

[0008] Preferably, rotating shafts are symmetrically installed on the outer wall of the flipping frame, and movable seats are movably fitted on the surface of each rotating shaft.

[0009] Preferably, the movable seat is connected to the fixed seat, and a set of rotating shafts are fitted with a rotating gear.

[0010] Preferably, a servo motor is installed inside the fixed base below the rotating gear disk, and a rotating gear is installed at the output end of the servo motor, and the rotating gear meshes with the rotating gear disk.

[0011] Preferably, a drive shaft is movably mounted inside the tilting frame, and the drive shaft extends to the outside of the tilting frame and is connected to the rotating disk.

[0012] Preferably, a stepper motor is installed inside the tilting frame on one side of the drive shaft, and a driven gear is fitted on the surface of the drive shaft below the rotating disk.

[0013] Preferably, a rotating gear is provided outside the flipping frame on one side of the driven gear, and the output end of the stepper motor is connected to the rotating gear, and the rotating gear meshes with the driven gear.

[0014] Preferably, a control panel is installed on the outer wall of the fixed base, and the output end of the control panel is electrically connected to the input end of the servo motor, stepper motor, and electric three-jaw chuck.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the rotary positioning tool not only realizes the convenient multi-level fixed limit of the low-pressure pipe, which is convenient to adapt to low-pressure pipes of different sizes, and facilitates the convenient circumferential rotation adjustment of the welding position of the low-pressure pipe, but also facilitates the tilt position adjustment for welding the low-pressure pipe, thus increasing the welding range of the low-pressure pipe. (1) Manually place the fixing frame on the surface of the electric three-jaw chuck through the positioning hole. Operate the control panel to open the electric three-jaw chuck. With the support of the rotating plate, the electric three-jaw chuck can be used to fix the fixing frame through the positioning hole. Manually place the low-pressure pipe to be welded on the surface of the two sets of positioning seats. Manually push the pull arm to facilitate the pull arm to drive the hinge block to rotate around the hinge axis through the drive shaft. The hinge block drives the drive arm to rotate around the flip axis through the limit shaft to facilitate the drive arm to drive the mounting sleeve to rotate. The mounting sleeve drives the clamping block to rotate to facilitate the clamping block to move to the surface of the low-pressure pipe to facilitate the two sets of positioning seats and clamping. With the cooperation of the clamping block, the low-pressure pipe is fixed and limited. The two sets of fixing bolts are manually rotated to facilitate the adjustment plate to change from a locked state to a loose state. The adjustment plate is manually pushed to facilitate its movement to the surface of the low-pressure pipe. The fixing bolts are manually rotated to facilitate the adjustment plate to change from a loose state to a locked state. This allows for convenient multi-level limiting and fixing of the low-pressure pipe through the fixing bolts, which is convenient for adapting to low-pressure pipes of different sizes. It realizes convenient multi-level fixing and limiting of the low-pressure pipe by the rotary positioning tool, which is convenient for adapting to low-pressure pipes of different sizes and avoids the low-pressure pipe from shifting during welding, thus avoiding the impact on the welding effect. (2) When it is necessary to adjust the welding position of the low-pressure pipe, the servo motor drives the rotating gear to rotate, the rotating gear drives the rotating gear plate to rotate, the rotating gear plate drives a set of rotating shafts to rotate, the movable seat provides movable support for the rotating shafts, the set of rotating shafts drives the rotating frame to rotate, under the movable support of the movable seat on another set of rotating shafts, the other set of rotating shafts provides movable support for the rotating frame, the rotating frame drives the rotating disk to rotate through the transmission shaft, the rotating disk drives the electric three-jaw chuck to rotate, the electric three-jaw chuck drives the fixed frame, limit frame, connecting seat, positioning seat, and clamped and fixed low-pressure pipe to conveniently tilt and adjust their positions. When rotating and repositioning the low-pressure pipe, a stepper motor drives a rotating gear, which in turn drives a driven gear, which in turn drives a transmission shaft. A tilting frame provides movable support for the transmission shaft, which in turn drives a rotating disk. The rotating disk then drives an electric three-jaw chuck, a fixed frame, a limit frame, a connecting seat, a positioning seat, and the low-pressure pipe to achieve convenient circumferential rotational position adjustment. This allows for convenient circumferential rotational adjustment of the low-pressure pipe welding position using the rotating and repositioning tooling, facilitating tilting position adjustment for welding the low-pressure pipe, increasing the welding range, and improving the convenience of welding the low-pressure pipe. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the fixing base of this utility model; Figure 4 This is a three-dimensional structural diagram of the pull arm of this utility model; Figure 5 This is a three-dimensional structural diagram of the rotating disk of this utility model; Figure 6 This is a three-dimensional structural diagram of the fixing frame of this utility model.

[0017] In the diagram: 1. Fixed base; 2. Tilting frame; 3. Rotary disk; 4. Electric three-jaw chuck; 5. Fixed frame; 6. Limiting frame; 7. Connecting seat; 8. Positioning seat; 9. Positioning hole; 10. Adjusting plate; 11. Fixing bolt; 12. Support base; 13. Pull arm; 14. Hinge block; 15. Drive arm; 16. Mounting sleeve; 17. Clamping block; 18. Drive shaft; 19. Tilting shaft; 20. Limiting shaft; 21. Hinge shaft; 22. Servo motor; 23. Tilting gear; 24. Control panel; 25. Tilting gear plate; 26. Rotating shaft; 27. Movable seat; 28. Stepper motor; 29. ​​Rotary gear; 30. Transmission shaft; 31. Driven gear. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Please see Figure 1-6 This utility model provides an embodiment of a rotary positioning fixture for low-pressure pipe welding, comprising a fixed base 1 and a flipping frame 2. The flipping frame 2 is movably mounted on the top of the fixed base 1, and a rotating disk 3 is movably mounted on the top of the flipping frame 2. An electric three-jaw chuck 4 is mounted on the top of the rotating disk 3. A fixed frame 5 is provided outside the electric three-jaw chuck 4 above the rotating disk 3. A limit frame 6 is mounted on the top of the fixed frame 5. A connecting seat 7 is mounted on the top of the fixed frame 5 on one side of the limit frame 6. Positioning seats 8 are symmetrically mounted on the top of the fixed frame 5 on one side of the connecting seat 7. An adjusting plate 10 is slidably mounted on the top of the limit frame 6, and the adjusting plate 10 extends to the outside of the limit frame 6. Fixing bolts 11 are symmetrically mounted on the top of the limit frame 6 above the adjusting plate 10, and the fixing bolts 11 extend to the surface of the adjusting plate 10. A positioning hole 9 is provided on the top of the fixed frame 5 below the adjusting plate 10. A support seat 12 is mounted on the top of the connecting seat 7. A positioning hole 9 is movably mounted on the outer wall of the support seat 12. A pull arm 13 has a hinge shaft 21 mounted on the outer wall of a support base 12 on one side, and the pull arm 13 is movably connected to the support base 12 via the hinge shaft 21. A hinge block 14 is movably mounted on the outer wall of the pull arm 13, and a drive shaft 18 is mounted on the outer wall of the hinge block 14 near the pull arm 13, and the pull arm 13 is movably connected to the hinge block 14 via the drive shaft 18. A drive arm 15 is movably mounted on the bottom end of the hinge block 14, and the drive arm 15 is located near the hinge block 14. A limiting shaft 20 is installed on the outer wall, and the drive arm 15 is movably connected to the hinge block 14 via the limiting shaft 20. A flip shaft 19 is installed on the outer wall of the drive arm 15 near the support base 12, and the drive arm 15 is movably connected to the support base 12 via the flip shaft 19. A clamping block 17 is provided inside the drive arm 15, and the clamping block 17 extends to the outside of the drive arm 15. An installation sleeve 16 is fitted on the surface of the clamping block 17, and the installation sleeve 16 is connected to the drive arm 15. The operator manually places the fixing bracket 5 on the surface of the electric three-jaw chuck 4 through the positioning hole 9. The operator then opens the electric three-jaw chuck 4 using the control panel 24. Supported by the rotating disk 3, the electric three-jaw chuck 4 secures the fixing bracket 5 through the positioning hole 9. The operator then places the low-pressure pipe to be welded on the surface of the two sets of positioning seats 8. The operator then pushes the pull arm 13, which drives the hinge block 14 to rotate around the hinge shaft 21 via the drive shaft 18. The hinge block 14, via the limit shaft 20, drives the drive arm 15 to rotate around the tilting shaft 19. With the support of the connecting seat 7 on the support seat 12, the support seat 12 provides movable support for the hinge shaft 21 and the tilting shaft 19, allowing the drive arm 15 to rotate the mounting sleeve 16. The mounting sleeve 16 then rotates the clamping block 17, facilitating the movement of the clamping block 17 to... The surface of the low-pressure pipe is designed to facilitate the fixing and limiting of the low-pressure pipe with the cooperation of two sets of positioning seats 8 and clamping blocks 17. The two sets of fixing bolts 11 are manually rotated to facilitate the adjustment plate 10 from the locked state to the loose state. The adjustment plate 10 is manually pushed, and with the sliding support of the limiting frame 6, the adjustment plate 10 is moved to the surface of the low-pressure pipe. The fixing bolts 11 are manually rotated to facilitate the adjustment plate 10 from the loose state to the locked state. This allows for convenient multi-level limiting and fixing of the low-pressure pipe through the fixing bolts 11, which is convenient for adapting to low-pressure pipes of different sizes. It realizes convenient multi-level fixing and limiting of the low-pressure pipe by the rotary positioning tool, which is convenient for adapting to low-pressure pipes of different sizes and avoids the low-pressure pipe from shifting during welding, thus avoiding the impact of welding effect. Symmetrical rotating shafts 26 are mounted on the outer wall of the tilting frame 2. Movable seats 27 are movably fitted onto the surface of each rotating shaft 26, and the movable seats 27 are connected to the fixed seat 1. A set of rotating shafts 26 are fitted with tilting gear discs 25. A servo motor 22 is installed inside the fixed seat 1 below the tilting gear discs 25. A tilting gear 23 is installed at the output end of the servo motor 22, and the tilting gear 23 meshes with the tilting gear discs 25. A drive shaft 30 is movably mounted inside the tilting frame 2, and the drive shaft 30 extends to the outside of the tilting frame 2. The drive shaft 30 is connected to... The rotating disk 3 is connected to the rotating frame 2 on one side of the drive shaft 30. A stepper motor 28 is installed inside the rotating frame 2. A driven gear 31 is fitted on the surface of the drive shaft 30 below the rotating disk 3. A rotating gear 29 is provided on the outside of the rotating frame 2 on one side of the driven gear 31. The output end of the stepper motor 28 is connected to the rotating gear 29, and the rotating gear 29 meshes with the driven gear 31. A control panel 24 is installed on the outer wall of the fixed base 1. The output end of the control panel 24 is electrically connected to the input end of the servo motor 22, the stepper motor 28, and the electric three-jaw chuck 4. When the position of the low-pressure pipe welding needs to be adjusted, the control panel 24 activates the servo motor 22. Supported by the fixed base 1, the servo motor 22 drives the rotating gear 23 to rotate. Under the meshing of the rotating gear 23 and the rotating gear disk 25, the rotating gear 23 drives the rotating gear disk 25 to rotate. The rotating gear disk 25 drives a set of rotating shafts 26 to rotate. The movable base 27 provides movable support for the rotating shafts 26. This set of rotating shafts 26 drives the rotating frame 2 to rotate. With the movable base 27 providing movable support for another set of rotating shafts 26, the other set of rotating shafts 26 provides movable support for the rotating frame 2. The rotating frame 2 drives the rotating disk 3 to rotate via the transmission shaft 30. The rotating disk 3 drives the electric three-jaw chuck 4 to rotate. The electric three-jaw chuck 4 drives the fixed base 5, the limit bracket 6, the connecting base 7, the positioning base 8, and the clamped and fixed low-pressure pipe to a convenient tilting position. When the low-pressure pipe needs to be rotated and repositioned, the control panel 24 turns on the stepper motor 28. Supported by the tilting frame 2, the stepper motor 28 drives the rotating gear 29 to rotate. Under the meshing of the rotating gear 29 and the driven gear 31, the rotating gear 29 drives the driven gear 31 to rotate, and the driven gear 31 drives the transmission shaft 30 to rotate. The tilting frame 2 provides movable support for the transmission shaft 30, and the transmission shaft 30 drives the rotating disk 3 to rotate. The rotating disk 3 drives the electric three-jaw chuck 4, the fixing frame 5, the limit frame 6, the connecting seat 7, the positioning seat 8, and the low-pressure pipe to conveniently rotate and adjust their positions. This realizes the convenient circumferential rotation adjustment of the low-pressure pipe welding position by the rotating and repositioning tool, which facilitates the tilting position adjustment for welding the low-pressure pipe, increases the welding range of the low-pressure pipe, and improves the convenience of welding the low-pressure pipe.

[0020] In this embodiment, during use: the fixing bracket 5 is manually placed on the surface of the electric three-jaw chuck 4 through the positioning hole 9. The control panel 24 is then turned on to open the electric three-jaw chuck 4. Supported by the rotating disk 3, the electric three-jaw chuck 4 facilitates the fixing of the fixing bracket 5 through the positioning hole 9. The low-pressure pipe to be welded is then placed on the surface of the two sets of positioning seats 8. The pull arm 13 is then manually pushed, allowing the pull arm 13 to drive the hinge block 14 to rotate around the hinge shaft 21 via the drive shaft 18. The hinge block 14, via the limit shaft 20, drives the drive arm 15 to rotate around the flip shaft 19, facilitating the drive arm 15 to move the mounting sleeve. Rotating the mounting sleeve 16 causes the clamping block 17 to rotate, facilitating its movement to the surface of the low-pressure pipe. This allows the low-pressure pipe to be fixed and limited by the cooperation of the two sets of positioning seats 8 and the clamping block 17. Manually rotating the two sets of fixing bolts 11 allows the adjusting plate 10 to be released from a locked state. Manually pushing the adjusting plate 10 allows it to move to the surface of the low-pressure pipe. Manually rotating the fixing bolts 11 allows the adjusting plate 10 to be locked from a loose state. This facilitates convenient multi-level limiting and fixing of the low-pressure pipe using the fixing bolts 11. To facilitate the adaptation to low-pressure pipes of different sizes, when the welding position of the low-pressure pipe needs to be adjusted, the servo motor 22 drives the rotating gear 23 to rotate, the rotating gear 23 drives the rotating gear disk 25 to rotate, the rotating gear disk 25 drives a set of rotating shafts 26 to rotate, the movable seat 27 provides movable support for the rotating shafts 26, and the set of rotating shafts 26 drives the rotating frame 2 to rotate. Under the movable support of the movable seat 27 for the other set of rotating shafts 26, the other set of rotating shafts 26 provides movable support for the rotating frame 2. The rotating frame 2 drives the rotating disk 3 to rotate via the transmission shaft 30, and the rotating disk 3 drives the electric three-jaw chuck 4 to rotate. The low-pressure pipe, which is clamped and fixed by the fixed frame 5, the limit frame 6, the connecting seat 7, and the positioning seat 8, can be easily tilted and adjusted. When the low-pressure pipe needs to be rotated and repositioned, the stepper motor 28 drives the rotating gear 29 to rotate, the rotating gear 29 drives the driven gear 31 to rotate, the driven gear 31 drives the transmission shaft 30 to rotate, the flipping frame 2 provides movable support for the transmission shaft 30, the transmission shaft 30 drives the rotating disk 3 to rotate, and the rotating disk 3 drives the electric three-jaw chuck 4, the fixed frame 5, the limit frame 6, the connecting seat 7, the positioning seat 8, and the low-pressure pipe to easily rotate and adjust their position, thus completing the use of the rotation and repositioning tool.

[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A rotary positioning tool for low-pressure pipe welding, characterized in that: The device includes a fixed base (1) and a flipping frame (2). The flipping frame (2) is movably mounted on the top of the fixed base (1). A rotating disk (3) is movably mounted on the top of the flipping frame (2). An electric three-jaw chuck (4) is mounted on the top of the rotating disk (3). A fixed frame (5) is provided outside the electric three-jaw chuck (4) above the rotating disk (3). A limit frame (6) is mounted on the top of the fixed frame (5). A connecting seat (7) is mounted on the top of the fixed frame (5) on one side of the limit frame (6). A positioning seat (8) is symmetrically mounted on the top of the fixed frame (5) on one side of the connecting seat (7). An adjusting plate (10) is slidably mounted on the top of the limit frame (6), and the adjusting plate (10) extends to the outside of the limit frame (6). A fixing bolt (11) is symmetrically installed on the top of the limiting frame (6) above the plate (10), and the fixing bolt (11) extends to the surface of the adjusting plate (10). A positioning hole (9) is provided on the top of the fixing frame (5) below the adjusting plate (10). A support seat (12) is installed on the top of the connecting seat (7). A pull arm (13) is movably installed on the outer wall of the support seat (12). A hinge shaft (21) is installed on the outer wall of the support seat (12) on one side of the pull arm (13), and the pull arm (13) is movably connected to the support seat (12) through the hinge shaft (21). A hinge block (14) is movably installed on the outer wall of the pull arm (13). A drive shaft (18) is installed on the outer wall of the hinge block (14) near the pull arm (13). The pull arm (13) is movably connected to the hinge block (14) via the drive shaft (18). The bottom end of the hinge block (14) is movably mounted with a drive arm (15). A limit shaft (20) is installed on the outer wall of the drive arm (15) near the hinge block (14), and the drive arm (15) is movably connected to the hinge block (14) via the limit shaft (20). A flip shaft (19) is installed on the outer wall of the drive arm (15) near the support base (12), and the drive arm (15) is movably connected to the support base (12) via the flip shaft (19). A clamping block (17) is provided inside the drive arm (15), and the clamping block (17) extends to the outside of the drive arm (15). The surface of the clamping block (17) is fitted with a mounting plate. A sleeve (16) is installed, and the sleeve (16) is connected to the drive arm (15). Rotating shafts (26) are symmetrically installed on the outer wall of the tilting frame (2). Movable seats (27) are movably fitted on the surface of each rotating shaft (26). The movable seats (27) are connected to the fixed seat (1). A tilting gear (25) is fitted on the surface of a set of rotating shafts (26). A servo motor (22) is installed inside the fixed seat (1) below the tilting gear (25). A tilting gear (23) is installed at the output end of the servo motor (22). The tilting gear (23) meshes with the tilting gear (25). A transmission shaft (30) is movably installed inside the tilting frame (2). The transmission shaft (30) extends to the outside of the tilting frame (2).Furthermore, the drive shaft (30) is connected to the rotating disk (3), and a stepper motor (28) is installed inside the tilting frame (2) on one side of the drive shaft (30). A driven gear (31) is fitted onto the surface of the drive shaft (30) below the rotating disk (3).

2. The rotary positioning tool for low-pressure pipe welding according to claim 1, characterized in that: A rotating gear (29) is provided on the outside of the flipping frame (2) on one side of the driven gear (31), and the output end of the stepper motor (28) is connected to the rotating gear (29), and the rotating gear (29) meshes with the driven gear (31).

3. The rotary positioning tool for low-pressure pipe welding according to claim 2, characterized in that: A control panel (24) is installed on the outer wall of the fixed base (1), and the output end of the control panel (24) is electrically connected to the input end of the servo motor (22), the stepper motor (28), and the electric three-jaw chuck (4).

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