Alignment welding device for stainless steel pipes

Abstract

The invention relates to the technical field of alignment welding devices, in particular to an alignment welding device for stainless steel pipes, which comprises a welding device main body, a lifting support and an upper chuck, an avoidance groove is formed in the upper surface of the welding device main body, a supporting rotating plate is arranged in the avoidance groove, and rotating shafts are fixedly connected to the side walls of the supporting rotating plate. According to the stainless steel pipe welding device, the fixing assembly, the steel pipe driving mechanism, the grinding wheel and the like are arranged to be used in cooperation, after welding is completed, the grinding wheel can grind a welded stainless steel pipe, and the problem that the attractiveness of the welding position is affected by molten metal knots appearing at the welding position is avoided; according to the automatic polishing and discharging device, manual feeding or discharging operation is not needed, polishing and discharging can be automatically completed through the automatic polishing and discharging device, then using of the automatic polishing and discharging device is facilitated, meanwhile, during polishing, feeding and welding of welding are not affected, and the problem that the welding efficiency is reduced due to polishing of the automatic polishing and discharging device is avoided.

Description

Technical Field

[0001] This invention relates to the field of alignment welding apparatus technology, specifically to an alignment welding apparatus for stainless steel pipes. Background Technology

[0002] Welding of stainless steel pipes can be carried out using a flash butt welding machine. The core principle of flash butt welding is to use the resistance heat between the contact surfaces of the workpieces to heat them to a molten state and complete the connection under the action of pre-forging force.

[0003] When welding stainless steel pipes, two sections of the pipes are clamped onto two fixtures of the welding machine (usually one fixed and one movable). After power is applied, the drive mechanism slowly, intermittently, or continuously pushes the workpieces closer together. When certain protrusions on the workpiece end faces contact, a huge current passes through these tiny contact points, instantly generating extremely high heat that melts or even vaporizes the metal, thus completing the weld. After welding, the weld joint will have molten metal nodules, affecting the appearance of the weld. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a positioning welding device for stainless steel pipes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for aligning stainless steel pipes, comprising a welding device body, a lifting bracket, and an upper clamp. A clearance groove is formed on the upper surface of the welding device body, and a supporting rotating plate is disposed within the clearance groove. Rotating shafts are fixedly connected to the side walls of the supporting rotating plate, and the rotating shafts are rotatably connected to the inner wall of the clearance groove. A first motor is fixedly connected to the inner wall of the welding device body, and one end of the rotating shaft passes through the clearance groove and is fixedly connected to the drive end of the first motor. Both sides of the supporting rotating plate are provided with… The device has a lower chuck, and both sides of the supporting rotating plate have cavities with fixing components inside. A guide plate is located below the supporting rotating plate. A discharge port is located on the side wall of the welding device body, and one end of the guide plate passes through the discharge port and extends to the outside of the welding device body. A steel pipe drive mechanism is located inside the welding device body. A grinding wheel is located below the guide plate, and a through hole is located on one side wall of the guide plate for the grinding wheel to pass through. An electric push rod is located inside the welding device body, and one end of the electric push rod is fixed to the grinding wheel.

[0006] Preferably, the upper clamp includes an upper fixed clamp and an upper movable clamp. The upper fixed clamp is fixed to the lifting bracket, the lifting bracket can drive the upper movable clamp to move left and right, and the lower end of the upper movable clamp is fixedly connected to a pin.

[0007] Preferably, the lower clamp includes a lower fixed clamp and a lower movable clamp. The lower fixed clamp is fixed to the supporting rotating plate. Both sides of the supporting rotating plate are provided with sliding grooves, and the lower movable clamp is slidably connected to the inner wall of the sliding groove. A first spring is fixedly connected to one side wall of the lower movable clamp, and a slot is provided on the upper surface of the lower movable clamp.

[0008] Preferably, the fixing assembly includes an electromagnet disposed in the cavity, and clamps are provided on both sides of the electromagnet, and the clamps are slidably connected to the inner wall of the cavity. Annular grooves are provided on both side walls of the cavity, and a limit rod and a second spring are provided in the annular grooves. One end of the second spring is fixedly connected to the limit rod, and one end of the limit rod passes through the annular groove and is fixed to the clamps.

[0009] Preferably, a transverse V-groove is provided on one side wall of the clamping plate, and the center line of the transverse V-groove is higher than the center axis of the stainless steel pipe.

[0010] Preferably, the steel pipe driving mechanism is an automatic chuck located inside the welding device body, and a rectangular rod is fixedly connected to one side wall of the automatic chuck. One end of the rectangular rod passes through the welding device body and extends to the outside of the welding device body. A rotating sleeve is slidably sleeved on the outer wall of the rectangular rod, and the rotating sleeve is rotatably connected to the welding device body. A first bevel gear is fixedly sleeved on the outer wall of the rotating sleeve, and a second bevel gear meshes with the side wall of the first bevel gear. A second motor is fixedly connected to the inner wall of the welding device body, and the second bevel gear is fixedly connected to the driving end of the second motor. A first cylinder is fixedly connected to the inner wall of the welding device body, and one end of the first cylinder passes through the welding device body and extends to the outside of the welding device body. A connecting plate is fixedly connected to one end of the first cylinder located outside the welding device body, and one side wall of the connecting plate is rotatably connected to one end of the rectangular rod.

[0011] Preferably, a positioning pin is provided on one side of the connecting plate, a positioning hole is provided on the side wall of the supporting rotating plate, one end of the positioning pin passes through the main body of the welding device and extends into the positioning hole, a third spring is sleeved on the outside of the positioning pin, and one end of the third spring is fixedly connected to the positioning pin.

[0012] Preferably, a second cylinder is fixedly connected to the outer wall of the main body of the welding device. One end of the second cylinder passes through the main body of the welding device and extends into the interior of the main body of the welding device. A conical pin is rotatably connected to one end of the second cylinder located inside the main body of the welding device.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention, through the coordinated use of a fixed component, a steel pipe drive mechanism, and a grinding wheel, allows the grinding wheel to polish the welded stainless steel pipe after welding. This prevents molten metal nodules from appearing at the weld joint, thus avoiding aesthetic issues. Furthermore, no manual loading or unloading is required during or after grinding; the device automatically completes the grinding and unloading process, making it convenient to use. Simultaneously, the grinding process does not interfere with the loading or welding process, preventing a decrease in welding efficiency due to grinding.

[0014] This invention, by setting an electromagnet in conjunction with a clamping plate, allows the electromagnet to attract the clamping plate to move after activation, thereby clamping the stainless steel pipe. This limits the movement of the stainless steel pipe when the supporting rotating plate rotates. Furthermore, by setting the height of the transverse V-groove, the stainless steel pipe can be lifted when the clamping plate holds it, allowing it to disengage from the lower clamp. This ensures that the stainless steel pipe does not contact the lower clamp when the pipe driving mechanism drives the pipe to rotate, thus preventing wear on the lower clamp.

[0015] This invention, by using a positioning pin in conjunction with a third spring, can limit the movement of the support plate, thereby ensuring its stability. When the first cylinder is activated, it pushes the connecting plate, rectangular rod, and automatic chuck to move, causing the automatic chuck to retract to a position that does not obstruct the rotation of the support plate. When the connecting plate moves, the third spring pushes the positioning pin to move, causing one end of the positioning pin to move out of the positioning hole, thereby releasing the positioning pin from limiting the movement of the support plate. This is convenient, quick, and requires no special control.

[0016] This invention, by setting a second cylinder and a conical ejector pin, allows the second cylinder to drive the conical ejector pin to press against one end of the stainless steel pipe when the steel pipe drive mechanism drives the stainless steel pipe to rotate, thereby ensuring the stability of the stainless steel pipe's rotation. This prevents the problem of unstable rotation of the stainless steel pipe during grinding, which would otherwise lead to a poor grinding effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the supporting rotating plate structure of the present invention; Figure 6 is a schematic diagram of the side cross-section of the support rotating plate of the present invention; Figure 7 is a schematic cross-sectional view of the support rotating plate structure of the present invention; Figure 8 is Figure 7 Enlarged structural diagram at point C.

[0018] In the diagram: 1. Main body of the welding device; 2. Lifting bracket; 3. Upper chuck; 4. Support plate; 5. Rotating shaft; 6. First motor; 7. Lower chuck; 8. Cavity; 9. Guide plate; 10. Discharge port; 11. Grinding wheel; 12. Through hole; 13. Electric push rod; 14. Electromagnet; 15. Clamping plate; 16. Annular groove; 17. Limiting rod; 18. Second spring; 19. Horizontal V-groove; 20. Automatic chuck; 21. Rectangular rod; 2. Rotating sleeve; 23. First bevel gear; 24. Second bevel gear; 25. Second motor; 26. First cylinder; 27. Connecting plate; 28. Positioning pin; 29. ​​Positioning hole; 30. Third spring; 31. Second cylinder; 32. Conical ejector pin; 301. Upper fixed clamp; 302. Upper moving clamp; 303. Pin; 701. Lower fixed clamp; 702. Lower moving clamp; 703. Slide groove; 704. First spring; 705. Slot. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 8 A welding device for stainless steel pipes includes a welding device body 1, a lifting bracket 2, and an upper clamp 3. A clearance groove is formed on the upper surface of the welding device body 1, and a supporting rotating plate 4 is installed within the clearance groove. A rotating shaft 5 is fixedly connected to the side walls of the supporting rotating plate 4, and the rotating shaft 5 is rotatably connected to the inner wall of the clearance groove. A first motor 6 is fixedly connected to the inner wall of the welding device body 1, and one end of the rotating shaft 5 passes through the clearance groove and is fixedly connected to the driving end of the first motor 6. Lower clamps 7 are provided on both sides of the supporting rotating plate 4. The side walls of both sides of the supporting rotating plate 4 are... The device has a cavity 8, and a fixing component is installed inside the cavity 8. A guide plate 9 is installed below the supporting rotating plate 4. A discharge port 10 is opened on the side wall of the welding device body 1, and one end of the guide plate 9 passes through the discharge port 10 and extends to the outside of the welding device body 1. A steel pipe drive mechanism is installed inside the welding device body 1. A grinding wheel 11 is installed below the guide plate 9, and a through hole 12 is opened on one side wall of the guide plate 9 for the grinding wheel 11 to pass through. An electric push rod 13 is installed inside the welding device body 1, and one end of the electric push rod 13 is fixed to the grinding wheel 11.

[0021] As can be seen from the above structure, by setting up a fixed component, a steel pipe drive mechanism and a grinding wheel 11, etc., the grinding wheel 11 can grind the stainless steel pipe after welding, so as to avoid the appearance of molten metal nodules at the weld joint. Moreover, no manual loading or unloading is required during or after grinding. The device can automatically complete the grinding and unloading, which facilitates the use of the device. At the same time, the device will not affect the loading and welding process during grinding, thus avoiding the problem of reduced welding efficiency due to grinding.

[0022] Furthermore, the upper chuck 3 includes an upper fixed chuck 301 and an upper movable chuck 302. The upper fixed chuck 301 is fixed to the lifting bracket 2. The lifting bracket 2 can drive the upper movable chuck 302 to move left and right. The lower end of the upper movable chuck 302 is fixedly connected to a pin 303. By setting the pin 303, after the upper movable chuck 302 moves to a certain position, one end of the pin 303 can be inserted into the lower chuck 7, so that the upper movable chuck 302 can drive a part of the lower chuck 7 to move.

[0023] Furthermore, the lower clamp 7 includes a lower fixed clamp 701 and a lower movable clamp 702. The lower fixed clamp 701 is fixed to the supporting rotating plate 4. Both sides of the supporting rotating plate 4 are provided with sliding grooves 703, and the lower movable clamp 702 is slidably connected to the inner wall of the sliding groove 703. A first spring 704 is fixedly connected to one side wall of the lower movable clamp 702. A slot 705 is provided on the upper surface of the lower movable clamp 702. By providing the slot 705, after the upper movable clamp 302 moves to a certain position, one end of the pin 303 can be inserted into the slot 705, so that when the upper movable clamp 302 moves, the upper movable clamp 302 can drive the lower movable clamp 702 to move.

[0024] Furthermore, the fixing assembly includes an electromagnet 14 disposed within the cavity 8, and clamping plates 15 are provided on both sides of the electromagnet 14, with the clamping plates 15 slidably connected to the inner wall of the cavity 8. Annular grooves 16 are provided on both side walls of the cavity 8, and a limit rod 17 and a second spring 18 are disposed within the annular grooves 16. One end of the second spring 18 is fixedly connected to the limit rod 17, and one end of the limit rod 17 passes through the annular groove 16 and is fixed to the clamping plate 15. By cooperating with the clamping plate 15, after the electromagnet 14 is activated, it can attract the clamping plate 15 to move, thereby causing the clamping plate 15 to clamp the stainless steel pipe.

[0025] Furthermore, a transverse V-groove 19 is provided on one side wall of the clamping plate 15, and the center line of the transverse V-groove 19 is higher than the center axis of the stainless steel pipe. By setting the height of the transverse V-groove 19, the stainless steel pipe can be lifted when the clamping plate 15 clamps the stainless steel pipe, thereby allowing the stainless steel pipe to disengage from the lower clamp 7. This ensures that the stainless steel pipe will not contact the lower clamp 7 when the steel pipe driving mechanism drives the stainless steel pipe to rotate, thus preventing the stainless steel pipe from wearing down the lower clamp 7.

[0026] Furthermore, the steel pipe drive mechanism is installed in the automatic chuck 20 inside the welding device body 1, and a rectangular rod 21 is fixedly connected to one side wall of the automatic chuck 20. One end of the rectangular rod 21 passes through the welding device body 1 and extends to the outside of the welding device body 1. A rotating sleeve 22 is slidably sleeved on the outer wall of the rectangular rod 21, and the rotating sleeve 22 is rotatably connected to the welding device body 1. A first bevel gear 23 is fixedly sleeved on the outer wall of the rotating sleeve 22, and a second bevel gear 24 meshes with the side wall of the first bevel gear 23. A second motor 25 is fixedly connected to the inner wall of the welding device body 1, and the second bevel gear 24 is fixedly connected to the drive end of the second motor 25. A first cylinder 26 is fixedly connected to the inner wall of the welding device body 1, and one end of the first cylinder 26 passes through the welding device body 1 and extends to the outside of the welding device body 1. One end of the first cylinder 26 is fixedly connected to a connecting plate 27, and one side wall of the connecting plate 27 is rotatably connected to one end of the rectangular rod 21. With the assistance of an automatic chuck 20, when the welded stainless steel pipe needs to be rotated, the first cylinder 26 is activated, causing it to pull the connecting plate 27, the rectangular rod 21, and the automatic chuck 20 to move. This moves the automatic chuck 20 to one end of the welded stainless steel pipe, and then the automatic chuck 20 is activated, clamping one end of the stainless steel pipe. The second motor 25 is activated, driving the second bevel gear 24 to rotate. The rotating second bevel gear 24 drives the first bevel gear 23 and the rotating sleeve 22 to rotate. The rotating sleeve 22 drives the rectangular rod 21 and the automatic chuck 20 to rotate, and the rotating automatic chuck 20 drives the stainless steel pipe to rotate.

[0027] Furthermore, a positioning pin 28 is provided on one side of the connecting plate 27, and a positioning hole 29 is provided on the side wall of the supporting rotating plate 4. One end of the positioning pin 28 passes through the main body 1 of the welding device and extends into the positioning hole 29. A third spring 30 is sleeved on the outside of the positioning pin 28, and one end of the third spring 30 is fixedly connected to the positioning pin 28. By setting the positioning pin 28 and the third spring 30 to work together, the supporting rotating plate 4 can be limited, thereby ensuring the stability of the supporting rotating plate 4. When the first cylinder 26 is started, the first cylinder 26 pushes the connecting plate 27, the rectangular rod 21 and the automatic chuck 20 to move, so that the automatic chuck 20 retracts to a position that does not block the rotation of the supporting rotating plate 4. When the connecting plate 27 moves, the third spring 30 pushes the positioning pin 28 to move, so that one end of the positioning pin 28 moves out of the positioning hole 29, thereby releasing the positioning pin 28 from limiting the supporting rotating plate 4. This is convenient and quick, and does not require special control.

[0028] Furthermore, a second cylinder 31 is fixedly connected to the outer wall of the welding device body 1. One end of the second cylinder 31 passes through the welding device body 1 and extends into the interior of the welding device body 1. A conical pin 32 is rotatably connected to one end of the second cylinder 31 located inside the welding device body 1. By setting the second cylinder 31 and the conical pin 32, when the steel pipe drive mechanism drives the stainless steel pipe to rotate, the second cylinder 31 can drive the conical pin 32 to push against one end of the stainless steel pipe, thereby ensuring the stability of the stainless steel pipe rotation. This avoids the problem of unstable rotation of the stainless steel pipe during grinding, which would lead to a poor grinding effect.

[0029] In this invention, during use, two sections of stainless steel pipes to be welded are placed on the lower fixed clamp 701 and the lower movable clamp 702 respectively. Then, the lifting bracket 2 drives the upper fixed clamp 301 and the upper movable clamp 302 to move down, so that the upper fixed clamp 301 and the upper movable clamp 302 press the two sections of stainless steel pipes respectively. When the upper movable clamp 302 presses the stainless steel pipes, the pin 303 is inserted into the slot 705. Then, the upper movable clamp 302 drives one section of stainless steel pipe and the lower movable clamp 702 to move, thereby bringing the two sections of stainless steel pipes closer to each other for flash butt welding. After welding is completed, the lifting bracket 2 drives the upper clamp 3 to reset, and then the electromagnet 14 above the support plate 4 is activated, which causes the electromagnet 14 to attract the two clamps 15 to move closer to each other, thereby causing the two clamps 15 to clamp the stainless steel pipe and complete the fixing of the stainless steel pipe after welding. Subsequently, the first cylinder 26 is activated, causing the first cylinder 26 to push the connecting plate 27, the rectangular rod 21 and the automatic chuck 20 to move, so that the automatic chuck 20 retracts to a position that will not obstruct the rotation of the support plate 4. When the connecting plate 27 moves, the third spring 30 pushes the positioning pin 28 to move, so that one end of the positioning pin 28 moves out of the positioning hole 29, thereby releasing the positioning pin 28 from limiting the support plate 4. When the first cylinder 26 is started, the second cylinder 31 is started at the same time, causing the second cylinder 31 to retract, thereby causing the second cylinder 31 to drive the cone pin 32 to a position that will not block the rotation of the support plate 4. Then the first motor 6 is started, causing the first motor 6 to drive the rotating shaft 5 and the support plate 4 to rotate half a turn. After the supporting rotating plate 4 rotates half a turn, the first cylinder 26 is started again, causing the first cylinder 26 to pull the connecting plate 27, the rectangular rod 21 and the automatic chuck 20 to move, so that the automatic chuck 20 moves to one end of the stainless steel pipe after welding. At the same time, the second cylinder 31 is started, causing the second cylinder 31 to push the conical pin 32, so that the conical pin 32 presses against one end of the stainless steel pipe. When the connecting plate 27 moves, the moving connecting plate 27 presses against the positioning pin 28, so that the positioning pin 28 moves, so that one end of the positioning pin 28 is inserted into the positioning hole 29, completing the limit of the supporting rotating plate 4. Then the automatic chuck 20 is started, so that the automatic chuck 20 clamps one end of the stainless steel pipe. The electromagnet 14 is de-energized, and the second spring 18 pushes the limit rod 17 and the clamping plate 15 to reset, so that the clamping plate 15 releases the clamped stainless steel pipe. Then the second motor 25 starts, and the started second motor 25 drives the second bevel gear 24 to rotate. The rotating second bevel gear 24 drives the first bevel gear 23 and the rotating sleeve 22 to rotate. The rotating sleeve 22 drives the rectangular rod 21 and the automatic chuck 20 to rotate. The rotating automatic chuck 20 drives the stainless steel pipe to rotate. Subsequently, the electric push rod 13 pushes the grinding wheel 11 to move upward, so that the grinding wheel 11 contacts the stainless steel pipe to grind the welded parts. During grinding, the material can be fed into the upper chuck 7 before welding, so that the grinding process does not affect the welding process, thus avoiding a decrease in the welding efficiency of the device. After the stainless steel pipe is welded, the stainless steel pipe below is ground at the same time. Then, the electric push rod 13 drives the grinding wheel 11 to move down and reset, and then the automatic chuck 20 releases the clamp, so that the ground stainless steel pipe falls onto the guide plate 9. The stainless steel pipe on the guide plate 9 rolls out of the main body 1 of the welding device, and then the grinding of the next stainless steel pipe can be carried out.

[0030] 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.

Claims

1. A welding device for stainless steel pipes, comprising a welding device body (1), a lifting bracket (2), and an upper clamp (3), characterized in that, The upper surface of the welding device body (1) is provided with a clearance groove, and a support rotating plate (4) is provided in the clearance groove. The side walls of the support rotating plate (4) are all fixedly connected with rotating shafts (5), and the rotating shafts (5) are rotatably connected to the inner wall of the clearance groove. The inner wall of the welding device body (1) is fixedly connected with a first motor (6), and one end of the rotating shaft (5) passes through the clearance groove and is fixedly connected to the driving end of the first motor (6). The two sides of the support rotating plate (4) are provided with lower clamps (7), and the two side walls of the support rotating plate (4) are provided with cavities (8), and fixing components are provided in the cavities (8). A guide plate (9) is provided below the support plate (4). A discharge port (10) is provided on the side wall of the welding device body (1). One end of the guide plate (9) passes through the discharge port (10) and extends to the outside of the welding device body (1). A steel pipe drive mechanism is provided inside the welding device body (1). A grinding wheel (11) is provided below the guide plate (9). A through hole (12) for the grinding wheel (11) to pass through is provided on one side wall of the guide plate (9). An electric push rod (13) is provided inside the welding device body (1). One end of the electric push rod (13) is fixed to the grinding wheel (11).

2. The alignment welding device for stainless steel pipes according to claim 1, characterized in that, The upper clamp (3) includes an upper fixed clamp (301) and an upper movable clamp (302). The upper fixed clamp (301) is fixed to the lifting bracket (2). The lifting bracket (2) can drive the upper movable clamp (302) to move left and right. The lower end of the upper movable clamp (302) is fixedly connected to a pin (303).

3. The alignment welding device for stainless steel pipes according to claim 2, characterized in that, The lower clamp (7) includes a lower fixed clamp (701) and a lower movable clamp (702). The lower fixed clamp (701) is fixed to the support rotating plate (4). The two side walls of the support rotating plate (4) are provided with sliding grooves (703). The lower movable clamp (702) is slidably connected to the inner wall of the sliding groove (703). A first spring (704) is fixedly connected to one side wall of the lower movable clamp (702). A slot (705) is provided on the upper surface of the lower movable clamp (702).

4. The alignment welding device for stainless steel pipes according to claim 3, characterized in that, The fixing assembly includes an electromagnet (14) disposed in the cavity (8), and clamps (15) are provided on both sides of the electromagnet (14), and the clamps (15) are slidably connected to the inner wall of the cavity (8). Annular grooves (16) are provided on both sides of the cavity (8), and a limit rod (17) and a second spring (18) are provided in the annular groove (16). One end of the second spring (18) is fixedly connected to the limit rod (17), and one end of the limit rod (17) passes through the annular groove (16) and is fixed to the clamps (15).

5. The alignment welding device for stainless steel pipes according to claim 4, characterized in that, A transverse V-groove (19) is provided on one side wall of the clamp (15), and the center line of the transverse V-groove (19) is higher than the center axis of the stainless steel pipe.

6. The alignment welding device for stainless steel pipes according to claim 1, characterized in that, The steel pipe driving mechanism is set in an automatic chuck (20) inside the welding device body (1), and a rectangular rod (21) is fixedly connected to one side wall of the automatic chuck (20). One end of the rectangular rod (21) passes through the welding device body (1) and extends to the outside of the welding device body (1). A rotating sleeve (22) is slidably sleeved on the outer wall of the rectangular rod (21), and the rotating sleeve (22) is rotatably connected to the welding device body (1). A first bevel gear (23) is fixedly sleeved on the outer wall of the rotating sleeve (22), and a second bevel gear meshes with the side wall of the first bevel gear (23). The inner wall of the welding device body (1) is fixedly connected to the wheel (24), the second motor (25) is fixedly connected to the second bevel gear (24), the second motor (25) is fixedly connected to the drive end of the second motor (25), the inner wall of the welding device body (1) is fixedly connected to the first cylinder (26), and one end of the first cylinder (26) passes through the welding device body (1) and extends to the outside of the welding device body (1). One end of the first cylinder (26) located outside the welding device body (1) is fixedly connected to the connecting plate (27), and one side wall of the connecting plate (27) is rotatably connected to one end of the rectangular rod (21).

7. The alignment welding device for stainless steel pipes according to claim 6, characterized in that, A positioning pin (28) is provided on one side of the connecting plate (27), and a positioning hole (29) is provided on the side wall of the supporting rotating plate (4). One end of the positioning pin (28) passes through the main body (1) of the welding device and extends into the positioning hole (29). A third spring (30) is sleeved on the outside of the positioning pin (28), and one end of the third spring (30) is fixedly connected to the positioning pin (28).

8. The alignment welding device for stainless steel pipes according to claim 6, characterized in that, The outer wall of the main body (1) of the welding device is fixedly connected to a second cylinder (31). One end of the second cylinder (31) passes through the main body (1) of the welding device and extends into the interior of the main body (1). One end of the second cylinder (31) located inside the main body (1) of the welding device is rotatably connected to a conical pin (32).

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