Welding device and method for fiber reinforced plastic profile

By combining the conveyor wheels and clamping plates, the problem of poor adaptability of existing welding devices is solved, enabling stable welding of fiber-reinforced plastic profiles and improving welding efficiency and quality.

CN122077944APending Publication Date: 2026-05-26FRIENDS OF HUBEI SCI & TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FRIENDS OF HUBEI SCI & TECH CO LTD
Filing Date
2025-11-14
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing welding equipment has poor adaptability, making it difficult to adapt to different specifications of profiles. The welding quality is unstable, and the operating efficiency is low, making it prone to welding defects.

Method used

The system employs a combination of conveyor wheels, clamping plates, and gear assemblies to achieve stable conveying and positioning of profiles. Welding is performed via hot joints, and the system is equipped with an emergency stop control button and multi-directional support rods to adapt to different profile specifications and ensure welding quality.

Benefits of technology

It achieves stable conveying and positioning of profiles, reduces welding defects, improves welding efficiency and safety, adapts to profiles of various sizes, and ensures welding strength and quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a welding device and method for fiber reinforced plastic profiles. The welding device comprises a working plate, the lower end of the working plate is fixedly connected with a plurality of stable bases, the working plate is fixedly connected with a conveying outer frame in a penetrating mode, a conveying belt wheel is movably connected into the conveying outer frame, one side of the working plate is fixedly connected with a rotating seat, and the other side of the working plate is fixedly connected with a rotating shaft. A working plate is fixedly connected to the rotating seat, supporting frames which are symmetrical about the rotating seat are fixedly connected to the working plate, clamping plates are correspondingly and movably connected to the interiors of the supporting frames, a first arm rod is movably connected to the working plate, righting rods which are symmetrical about the conveying belt wheel are movably connected to the working plate, and an emergency stop control button is fixedly connected to one end of the working plate. The problems that displacement of profiles is avoided, welding defects caused by inaccurate positioning or infirm attachment are reduced, the welding strength of fiber reinforced plastic profiles is guaranteed, the profiles of various sizes are compatible, the overall structure is convenient to operate, the welding efficiency is improved, and the operation risk is reduced are solved.
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Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding device and method for fiber-reinforced plastic profiles. Background Technology

[0002] In the fields of building materials and transportation, fiber-reinforced plastic profiles are increasingly used due to their lightweight and high strength. Traditional welding often relies on manual hot melting or simple mechanical heating, which is prone to uneven heating, leading to cracking and insufficient strength at the weld joints. In addition, manual operation is inefficient and difficult to adapt to the needs of mass production.

[0003] Existing welding equipment is mostly designed for single-specification profiles, requiring frequent structural adjustments when changing profiles, resulting in poor adaptability; moreover, it lacks precise temperature and pressure control functions, leading to large fluctuations in welding quality. With the increasing demands of profile applications, there is a need for a device and method that is highly adaptable and can reliably guarantee welding quality. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a welding device and method for fiber-reinforced plastic profiles, which solves the problems of avoiding profile displacement, reducing welding defects caused by inaccurate positioning or poor adhesion, ensuring the welding strength of fiber-reinforced plastic profiles, adapting to welding of profiles of different specifications, being compatible with profiles of various sizes, having an overall structure that is easy to operate, improving welding efficiency, and reducing operational risks.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding device and method for fiber-reinforced plastic profiles, comprising a working plate, a plurality of stabilizing bases fixedly connected to the lower end of the working plate, a conveying outer frame fixedly connected through the working plate, a conveying pulley movably connected inside the conveying outer frame, a rotating seat fixedly connected to one side of the working plate, a support frame symmetrical to the rotating seat fixedly connected to the working plate, clamping plates movably connected to the corresponding support frame, a first arm movably connected to the working plate, a straightening rod symmetrical to the conveying pulley movably connected to the working plate, and an emergency stop control button fixedly connected to one end of the working plate.

[0008] Preferably, symmetrical belt shafts are movably connected inside the working plate, and the two ends of the conveying pulley are correspondingly and movably connected to the belt shafts. A second rotating gear is fixedly connected to the side of the belt shaft, a first motor is fixedly connected to the side of the conveying frame, a first rotating gear is rotatably connected to the side of the first motor, and gear belts are correspondingly and movably connected to the first rotating gear and the second rotating gear.

[0009] Preferably, the support frame has a corresponding guide slot, the upper end of the clamping plate is fixedly connected to a slider, the slider is movably connected to the guide slot, the side of the clamping plate is fixedly connected to a clamping push rod, and the other side of the clamping plate is fixedly connected to a friction strip.

[0010] Preferably, a plurality of symmetrical fourth motors are fixedly connected to the working plate, and a fifth rotating gear is rotatably connected to the corresponding fourth motor. The clamping push rod is movably connected to the support frame, and a third gear groove is correspondingly opened on the clamping push rod. The fifth rotating gear is movably connected to the third gear groove.

[0011] Preferably, the working plate is fixedly connected with a limiting rod symmetrical to the conveyor wheel, and a rotating bushing is correspondingly sleeved and movably connected to the limiting rod. The rotating bushing is correspondingly fixedly connected to one end of the straightening rod, and a friction roller is correspondingly movably connected through the other end of the straightening rod. A symmetrical third motor is fixedly connected to the working plate, and a fourth rotating gear is correspondingly rotatably connected to the third motor. A first gear groove is correspondingly opened on the rotating bushing, and the third motor is meshed and movably connected to the first gear groove.

[0012] Preferably, the working plate and the rotating seat are respectively provided with corresponding mating slots. The lower end of the working plate is fixedly connected to a second motor. The side of the second motor is rotatably connected to a third rotating gear. The third rotating gear is movably connected through the third rotating gear. One end of the first arm is fixedly connected to a symmetrical first rotating rod. The first rotating rod is movably connected through the rotating seat. One end of the first rotating rod is provided with a second gear slot. The third rotating gear is movably connected to the second gear slot.

[0013] Preferably, a second arm is movably connected to the side of the first arm, one end of the second arm is fixedly connected to a symmetrical second rotating rod, the second rotating rod is movably connected through to the other end of the first arm, and the other end of the second arm is fixedly connected to a clamping fork arm.

[0014] Preferably, symmetrical multi-directional support rods are fixedly connected to the work plate, and a bonding plate is movably connected to the multi-directional support rods. An installation sleeve is fixedly connected through the bonding plate, and symmetrical third rotating rods are fixedly connected to the side of the installation sleeve. The third rotating rods are movably connected through the clamping fork arm. A welding machine is fixedly connected to the other side of the work plate, and a heat connector is movably connected through the installation sleeve. A data cable is fixedly connected to the upper end of the heat connector, and the other end of the data cable is fixedly connected through the welding machine.

[0015] Preferably, in step S1, the device is fixed by the stable base at the lower end of the work plate, and the emergency stop control button is checked to be in standby status; the fiber-reinforced plastic profile to be welded is placed on the conveyor roller inside the conveyor frame;

[0016] S2. Start the third motor, which drives the fourth rotating gear to mesh with the first gear groove of the rotating shaft sleeve, causing the straightening rod to rotate around the limit rod until the friction roller at the end of the straightening rod is in contact with the side of the profile; at the same time, start the fourth motor, and the fifth rotating gear meshes with the third gear groove of the clamping push rod, pushing the clamping plate to move along the guide slot of the support frame through the slider, so that the friction strip of the clamping plate clamps the profile.

[0017] S3. Start the first motor, which drives the first rotating gear to rotate. The gear belt drives the second rotating gear to rotate synchronously with the belt shaft. The conveyor pulley rotates with the belt shaft, smoothly conveying the positioned profile to the welding position below the heat joint. Then, turn off the first motor.

[0018] S4. Start the second motor, and the third rotating gear meshes with the second gear groove of the first rotating rod, driving the first arm to rotate around the rotating seat; adjust the angle of the second arm through the second rotating rod so that the clamping fork arm drives the bonding plate and the installation sleeve to move down through the third rotating rod until the heat joint is aligned with the profile to be welded; start the welding machine, and control the heat joint to heat the profile to be welded end through the data cable, while the multi-directional support rod assists the bonding plate to lightly press the profile;

[0019] S5. After the heat joint has been heated for the set time, turn off the welding machine and reset the heat joint. After the welded part of the profile has cooled and solidified, start the fourth motor and the third motor to reset the clamping plate and the straightening rod. Start the first motor again and the conveyor wheel will transport the welded profile out of the device to complete one welding process.

[0020] (III) Beneficial Effects

[0021] This invention provides a welding apparatus and method for fiber-reinforced plastic profiles. It offers the following advantages:

[0022] 1. Stable conveying of profiles is achieved through the conveyor pulley in conjunction with the belt shaft and gear assembly; the clamping plate, driven by the clamping push rod, clamps the profiles via friction strips, and the straightening rod drives the friction rollers to assist in positioning and prevent profile displacement; the welding machine heats the welding joint through the heat joint, and the bonding plate, in conjunction with the multi-directional support rod, ensures tight welding and reduces welding defects caused by inaccurate positioning or poor bonding, thus guaranteeing the welding strength of fiber-reinforced plastic profiles.

[0023] 2. The first and second booms can be adjusted to change the position of the heat joint via motor and gear transmission, adapting to welding different specifications of profiles; the emergency stop control button can quickly interrupt the operation to avoid accidents; the slider can move along the guide slot to adjust the spacing of the clamping plates, compatible with various sizes of profiles. The overall structure is easy to operate, improves welding efficiency, and reduces operational risks. Attached Figure Description

[0024] Figure 1 This is a top-view axonometric schematic diagram of the present invention;

[0025] Figure 2 This is a bottom-view axial side view of the present invention;

[0026] Figure 3 For the present invention Figure 2 Enlarged view of point A above;

[0027] Figure 4 For the present invention Figure 2 Enlarged view of point B above;

[0028] Figure 5 This is a schematic diagram of the device inlet structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the welding structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the plate clamping structure of the present invention.

[0031] The components include: 1. Working plate; 2. Stable base; 3. Conveying frame; 4. Support frame; 5. Clamping push rod; 6. Clamping plate; 7. Conveying pulley; 8. First arm; 9. Second arm; 10. Adhesive plate; 11. Multi-directional support rod; 12. Friction strip; 13. Straightening rod; 14. Welding machine; 15. First motor; 16. First rotating gear; 17. Second rotating gear; 18. Gear belt; 19. Second motor; 20. Third rotating gear; 21. Fitting groove; 22. Friction roller. 23. Belt shaft; 24. Emergency stop control button; 25. Limit rod; 26. Rotating bushing; 27. First gear slot; 28. Third motor; 29. ​​Fourth rotating gear; 30. Second gear slot; 31. First rotating rod; 32. Second rotating rod; 33. Third rotating rod; 34. Clamping fork arm; 35. Mounting sleeve; 36. Heat connector; 37. Guide slot; 38. Slider; 39. Fourth motor; 40. Fifth rotating gear; 41. Third gear slot; 42. Rotary seat; 43. Data cable. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example:

[0034] like Figure 1-7 As shown, this embodiment of the invention provides a welding device and method for fiber-reinforced plastic profiles, including a working plate 1. Multiple stable bases 2 are fixedly connected to the lower end of the working plate 1. A conveying outer frame 3 is fixedly connected through the working plate 1. A conveying pulley 7 is movably connected inside the conveying outer frame 3. A rotating seat 42 is fixedly connected to one side of the working plate 1. A support frame 4, symmetrical to the rotating seat 42, is fixedly connected to the working plate 1. A clamping plate 6 is movably connected to the support frame 4. A first arm 8 is movably connected to the working plate 1. A straightening rod 13, symmetrical to the conveying pulley 7, is movably connected to the working plate 1. The straightening rod 13 can assist in calibrating the profile conveying direction. An emergency stop control button 24 is fixedly connected to one end of the working plate 1. Pressing the emergency stop control button 24 can immediately stop the equipment operation, ensuring operational safety.

[0035] Symmetrical belt shafts 23 are movably connected inside the working plate 1. The two ends of the conveyor pulley 7 are correspondingly and movably connected to the belt shafts 23. The sides of the belt shafts 23 are correspondingly and fixedly connected to the second rotating gears 17. The sides of the conveyor frame 3 are fixedly connected to the first motor 15. The sides of the first motor 15 are rotatably connected to the first rotating gear 16. The first rotating gear 16 and the second rotating gear 17 are correspondingly and movably connected to the gear belts 18. The first rotating gear 16 drives the second rotating gear 17 to rotate through the gear belt 18, thereby driving the belt shafts 23 and the conveyor pulley 7 to rotate.

[0036] The support frame 4 has a corresponding guide slot 37. The upper end of the clamping plate 6 is fixedly connected to a slider 38, which is movably connected to the guide slot 37. The side of the clamping plate 6 is fixedly connected to a clamping push rod 5, and the other side of the clamping plate 6 is fixedly connected to a friction strip 12. The friction strip 12 can increase the friction between the clamping plate 6 and the profile, improve the clamping stability, and prevent the profile from sliding.

[0037] Multiple symmetrical fourth motors 39 are fixedly connected to the working plate 1. A fifth rotating gear 40 is rotatably connected to the fourth motor 39. The clamping push rod 5 is movably connected to the support frame 4. A third gear groove 41 is opened on the clamping push rod 5. The fifth rotating gear 40 is movably connected to the third gear groove 41. The fifth rotating gear 40 drives the clamping push rod 5 to move along the support frame 4 through meshing with the third gear groove 41.

[0038] A limiting rod 25 symmetrical to the conveyor wheel 7 is fixedly connected to the working plate 1. A rotating bushing 26 is movably connected to the limiting rod 25. The rotating bushing 26 is fixedly connected to one end of the straightening rod 13. A friction roller 22 is movably connected through the other end of the straightening rod 13. A third motor 28 symmetrically connected to the working plate 1 is fixedly connected to the working plate 1. A fourth rotating gear 29 is rotatably connected to the third motor 28. A first gear groove 27 is opened on the rotating bushing 26. The third motor 28 is movably connected to the first gear groove 27. When the third motor 28 is started, it can drive the rotating bushing 26 to rotate.

[0039] The working plate 1 and the rotating seat 42 are respectively provided with corresponding mating slots 21. The lower end of the working plate 1 is fixedly connected to the second motor 19. The side of the second motor 19 is rotatably connected to the third rotating gear 20. The third rotating gear 20 is movably connected through the third rotating gear 20. One end of the first arm 8 is fixedly connected to the symmetrical first rotating rod 31. The first rotating rod 31 is movably connected through the rotating seat 42. One end of the first rotating rod 31 is provided with a second gear groove 30. The third rotating gear 20 is meshed and movably connected to the second gear groove 30. When the second motor 19 is started, the third rotating gear 20 drives the first rotating rod 31 and the first arm 8 to rotate by meshing with the second gear groove 30.

[0040] The first arm 8 is movably connected to the side of the second arm 9. One end of the second arm 9 is fixedly connected to a symmetrical second rotating rod 32. The second rotating rod 32 is movably connected to the other end of the first arm 8. The other end of the second arm 9 is fixedly connected to a clamping fork arm 34. The clamping fork arm 34 is used to connect and fix the welding-related components and assist in adjusting the position of the welding components.

[0041] A symmetrical multi-directional support rod 11 is fixedly connected to the work plate 1. A bonding plate 10 is movably connected to the multi-directional support rod 11. An installation sleeve 35 is fixedly connected through the bonding plate 10. A symmetrical third rotating rod 33 is fixedly connected to the side of the installation sleeve 35. The third rotating rod 33 is movably connected through the clamping fork arm 34. A welding machine 14 is fixedly connected to the other side of the work plate 1. A heat connector 36 is movably connected through the installation sleeve 35. A data cable 43 is fixedly connected to the upper end of the heat connector 36. The other end of the data cable 43 is fixedly connected through the welding machine 14. The data cable 43 is used to transmit control signals and data between the welding machine 14 and the heat connector 36.

[0042] S1. Fix the device with the stable base 2 at the lower end of the working plate 1 and check the standby status of the emergency stop control button 24; place the fiber reinforced plastic profile to be welded on the conveyor wheel 7 inside the conveyor frame 3, ensuring that the end of the profile to be welded faces the welding area.

[0043] S2. Start the third motor 28, which drives the fourth rotating gear 29 to mesh with the first gear groove 27 of the rotating bushing 26, causing the straightening rod 13 to rotate around the limiting rod 25 until the friction roller 22 at the end of the straightening rod 13 is in contact with the side of the profile; at the same time, start the fourth motor 39, and the fifth rotating gear 40 meshes with the third gear groove 41 of the clamping push rod 5, pushing the clamping plate 6 to move along the guide slot 37 of the support frame 4 through the slider 38, so that the friction strip 12 of the clamping plate 6 clamps the profile and prevents displacement;

[0044] S3. Start the first motor 15, which drives the first rotating gear 16 to rotate. Through the gear belt 18, the second rotating gear 17 and the belt shaft 23 rotate synchronously. The conveyor pulley 7 rotates with the belt shaft 23, and smoothly conveys the positioned profile to the welding position below the heat joint 36. Then turn off the first motor 15.

[0045] S4. Start the second motor 19, and the third rotating gear 20 meshes with the second gear groove 30 of the first rotating rod 31, driving the first arm 8 to rotate around the rotating seat 42; adjust the angle of the second arm 9 through the second rotating rod 32, so that the clamping fork arm 34 drives the bonding plate 10 and the installation sleeve 35 to move down through the third rotating rod 33 until the heat joint 36 is aligned with the profile to be welded; start the welding machine 14, and control the heat joint 36 to heat the profile to be welded end through the data cable 43. At the same time, the multi-directional support rod 11 assists the bonding plate 10 to lightly press the profile to ensure that the weld is tightly fitted;

[0046] S5. After the heat joint 36 has been heated for the set time, turn off the welding machine 14 and reset the heat joint 36. After the profile welding area has cooled and solidified, start the fourth motor 39 and the third motor 28 to reset the clamping plate 6 and the straightening rod 13. Start the first motor 15 again and the conveyor wheel 7 will convey the welded profile out of the device to complete one welding process.

[0047] Working principle:

[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.

Claims

1. A welding apparatus for fiber-reinforced plastic profiles, comprising a work plate (1), characterized in that: The lower end of the working plate (1) is fixedly connected to multiple stable bases (2). A conveying outer frame (3) is fixedly connected through the working plate (1). A conveying wheel (7) is movably connected inside the conveying outer frame (3). A rotating seat (42) is fixedly connected to one side of the working plate (1). A support frame (4) symmetrical to the rotating seat (42) is fixedly connected to the working plate (1). A clamping plate (6) is movably connected to the support frame (4). A first arm (8) is movably connected to the working plate (1). A straightening rod (13) symmetrical to the conveying wheel (7) is movably connected to the working plate (1). An emergency stop control button (24) is fixedly connected to one end of the working plate (1).

2. The welding apparatus for fiber-reinforced plastic profiles according to claim 1, characterized in that: The working plate (1) is movably connected to symmetrical belt shafts (23). The two ends of the conveying pulley (7) are correspondingly and movably connected to the belt shafts (23). The sides of the belt shafts (23) are correspondingly and fixedly connected to the second rotating gears (17). The sides of the conveying outer frame (3) are fixedly connected to the first motor (15). The sides of the first motor (15) are rotatably connected to the first rotating gears (16). The first rotating gears (16) and the second rotating gears (17) are correspondingly and movably connected to gear belts (18).

3. The welding apparatus for fiber-reinforced plastic profiles according to claim 1, characterized in that: The support frame (4) has a corresponding guide slot (37), the upper end of the clamping plate (6) is fixedly connected to a slider (38), the slider (38) is movably connected through the guide slot (37), the side of the clamping plate (6) is fixedly connected to a clamping push rod (5), and the other side of the clamping plate (6) is fixedly connected to a friction strip (12).

4. The welding apparatus for fiber-reinforced plastic profiles according to claim 3, characterized in that: Multiple symmetrical fourth motors (39) are fixedly connected to the working plate (1). A fifth rotating gear (40) is rotatably connected to the fourth motor (39). The clamping push rod (5) is movably connected to the support frame (4). A third gear groove (41) is opened on the clamping push rod (5). The fifth rotating gear (40) is movably connected to the third gear groove (41).

5. The welding apparatus for fiber-reinforced plastic profiles according to claim 1, characterized in that: The working plate (1) is fixedly connected to a limiting rod (25) symmetrical to the conveying wheel (7). A rotating bushing (26) is movably connected to the limiting rod (25). The rotating bushing (26) is fixedly connected to one end of the straightening rod (13). A friction roller (22) is movably connected to the other end of the straightening rod (13). A symmetrical third motor (28) is fixedly connected to the working plate (1). A fourth rotating gear (29) is rotatably connected to the third motor (28). A first gear groove (27) is correspondingly opened on the rotating bushing (26). The third motor (28) is movably connected to the first gear groove (27).

6. The welding apparatus for fiber-reinforced plastic profiles according to claim 1, characterized in that: The working plate (1) and the rotating seat (42) are respectively provided with corresponding matching slots (21). The lower end of the working plate (1) is fixedly connected to a second motor (19). The side of the second motor (19) is rotatably connected to a third rotating gear (20). The third rotating gear (20) is movably connected through the third rotating gear (20). One end of the first arm (8) is fixedly connected to a symmetrical first rotating rod (31). The first rotating rod (31) is movably connected through the rotating seat (42). One end of the first rotating rod (31) is provided with a second gear groove (30). The third rotating gear (20) is meshed and movably connected to the second gear groove (30).

7. The welding apparatus for fiber-reinforced plastic profiles according to claim 1, characterized in that: The side of the first arm (8) is movably connected to the second arm (9), one end of the second arm (9) is fixedly connected to the symmetrical second rotating rod (32), the second rotating rod (32) is movably connected through to the other end of the first arm (8), and the other end of the second arm (9) is fixedly connected to the clamping fork arm (34).

8. The welding apparatus for fiber-reinforced plastic profiles according to claim 7, characterized in that: A symmetrical multi-directional support rod (11) is fixedly connected to the working plate (1). A bonding plate (10) is movably connected to the multi-directional support rod (11). An installation sleeve (35) is fixedly connected through the bonding plate (10). A symmetrical third rotating rod (33) is fixedly connected to the side of the installation sleeve (35). The third rotating rod (33) is movably connected through the clamping fork arm (34). A welding machine (14) is fixedly connected to the other side of the working plate (1). A heat connector (36) is movably connected through the installation sleeve (35). A data cable (43) is fixedly connected to the upper end of the heat connector (36). The other end of the data cable (43) is fixedly connected through the welding machine (14).

9. A welding apparatus and method for fiber-reinforced plastic profiles, characterized in that: S1. Fix the device with the stable base (2) at the lower end of the working plate (1) and check the standby status of the emergency stop control button (24); place the fiber-reinforced plastic profile to be welded on the conveyor wheel (7) inside the conveyor frame (3); S2. Start the third motor (28), which drives the fourth rotating gear (29) to mesh with the first gear groove (27) of the rotating bushing (26), causing the straightening rod (13) to rotate around the limiting rod (25) until the friction roller (22) at the end of the straightening rod (13) is in contact with the side of the profile; at the same time, start the fourth motor (39), and the fifth rotating gear (40) meshes with the third gear groove (41) of the clamping push rod (5), pushing the clamping plate (6) to move along the guide slot (37) of the support frame (4) through the slider (38), so that the friction strip (12) of the clamping plate (6) clamps the profile; S3. Start the first motor (15), which drives the first rotating gear (16) to rotate. Through the gear belt (18), the second rotating gear (17) and the belt shaft (23) rotate synchronously. The conveying wheel (7) rotates with the belt shaft (23) to smoothly convey the positioned profile to the welding position below the heat joint (36). Then turn off the first motor (15). S4. Start the second motor (19), and the third rotating gear (20) meshes with the second gear groove (30) of the first rotating rod (31), driving the first arm (8) to rotate around the rotating seat (42); adjust the angle of the second arm (9) through the second rotating rod (32), so that the clamping fork arm (34) drives the bonding plate (10) and the installation sleeve (35) to move down through the third rotating rod (33) until the heat joint (36) is aligned with the profile to be welded; start the welding machine (14), and control the heat joint (36) to heat the profile to be welded end through the data cable (43), while the multi-directional support rod (11) assists the bonding plate (10) to lightly press the profile; S5. After the heat joint (36) has been heated for the set time, turn off the welding machine (14) and reset the heat joint (36); wait for the profile welding area to cool and solidify, start the fourth motor (39) and the third motor (28) to reset the clamping plate (6) and the straightening rod (13); start the first motor (15) again, and the conveyor wheel (7) will convey the welded profile out of the device to complete one welding process.