Aluminum alloy profile welding equipment

Abstract

The utility model relates to aluminum alloy section welding equipment which comprises an outer shell, a welding ring is rotatably connected to the inner wall of the outer shell, a plurality of welding guns are fixedly connected to the inner end of the welding ring, the welding guns are symmetrically arranged on the same horizontal plane, a gear ring is fixedly connected to the outer wall of the welding ring, and a driving gear is connected to the outer end of the gear ring in a meshed mode. The inner end of the driving gear is fixedly connected with a driving motor through a transmission shaft, the inner wall of the welding ring is rotationally connected with a heat preservation layer, the inner wall of the heat preservation layer is fixedly connected with a plurality of flow guide pipes, and the flow guide pipes are distributed around the axis of the heat preservation layer in a circumferential array mode. The temperature of a welding area is accurately controlled by utilizing a circulating fan, accelerating preheating and uniformly cooling processes, the welding speed is increased through symmetrical arrangement of welding guns and a rotary welding technology, uniformity and attractiveness of welding seams are ensured, and the welding efficiency and the quality of finished products are integrally improved.

Description

Technical Field

[0001] The utility model relates to a welding device for aluminum alloy profiles, in particular to an aluminum alloy profile welding device applied to the field of aluminum alloy profile processing. Background Art

[0002] In modern manufacturing, aluminum alloy profiles are widely used in many fields such as aviation, automotive, and construction due to their light weight, high strength, and good corrosion resistance. However, the welding process of aluminum alloy is more complex than that of traditional steel, mainly facing challenges such as high thermal conductivity, easy generation of thermal cracks, and large welding deformation. These factors directly affect the performance, stability, and appearance quality of the welded structure. Therefore, it is particularly important to develop an aluminum alloy profile welding device with high efficiency, precision, and effective control of welding quality.

[0003] Traditional aluminum alloy welding methods, such as TIG (tungsten inert gas welding) and MIG (metal inert gas shielded welding), although they can achieve good welding effects, have limitations in terms of automation level, welding efficiency, and welding quality consistency.

[0004] The specification of the Chinese utility model patent CN206084069U discloses an energy-saving aluminum alloy profile welding device, including a guide rail and a main body. There are guide wheels between the guide rail and the main body. A cross beam is provided on the upper part of the main body. A welding component is installed on the lower part of the cross beam. A roller is installed on the welding component. A welding disc is provided on one side of the upper part of the main body. A gas input component is provided on the other side of the main body. The gas input component includes a combustible gas source and a gas pipeline connected to the combustible gas source. The gas pipeline is connected to a welding head. The welding head is arranged at the lower part of the secondary rod. A controller is also provided on the main body. A photovoltaic panel is installed on the top of the cross beam. A storage battery is installed at the lower part of the main body. The storage battery stores the electric energy generated by the photovoltaic panel. The storage battery is connected to the lighting system of the device, which is more energy-saving and environment-friendly.

[0005] Although the above design solves the problem of energy conservation and environmental protection of the aluminum alloy welding device, there are still certain limitations, such as low automation level, low welding efficiency, and general welding quality consistency. Summary of the Utility Model

[0006] Aiming at the above-mentioned prior art, the technical problem to be solved by the utility model is to provide an aluminum alloy profile welding device integrating automatic positioning, uniform preheating, intelligent temperature control, and high-efficiency welding technologies.

[0007] To solve the above problems, the present invention provides an aluminum alloy profile welding device, including an outer housing. The inner wall of the outer housing is rotatably connected with a welding ring. The inner end of the welding ring is fixedly connected with a plurality of welding torches, and the welding torches are symmetrically arranged on the same horizontal plane. The outer wall of the welding ring is fixedly connected with a toothed ring. The outer end of the toothed ring is meshed with a driving gear. The inner end of the driving gear is fixedly connected with a driving motor through a transmission shaft. The inner wall of the welding ring is rotatably connected with a heat preservation layer. The inner wall of the heat preservation layer is fixedly connected with a plurality of diversion pipes. The diversion pipes are distributed in a circumferential array around the axis of the heat preservation layer, and the diversion pipes penetrate through the heat preservation layer and are communicated with the cavity formed by the outer housing and the heat preservation layer. The plurality of circumferentially distributed diversion pipes are linearly arrayed along the axis of the heat preservation layer. The outer walls of the plurality of diversion pipes are wound with heating wires. One end of the heat preservation layer away from the welding torch is fixedly connected with a cover plate, and the cover plate is fixedly connected with the outer housing. The inner wall of the cover plate is fixedly connected with an inner housing. The diversion pipes penetrate through the inner housing and are fixedly connected with the inner housing. The inner end of the cover plate is in contact with an aluminum alloy pipe.

[0008] As a further improvement of the present application, the outer end of the cover plate is fixedly connected with a frame. The inner wall of the frame is fixedly connected with a plurality of first racks. The plurality of first racks are all meshed with a clamping gear. The clamping gear is meshed with a second rack. The outer end of the second rack is fixedly connected with an upper clamping plate.

[0009] As a further improvement of the present application, the V-shaped groove at the bottom end of the upper clamping plate is in contact with the aluminum alloy pipe. The bottom end of the frame is fixedly connected with a lower clamping plate. The V-shaped groove of the lower clamping plate is in contact with the aluminum alloy pipe. The inner end of the upper clamping plate is fixedly connected with a circulation fan.

[0010] As a further improvement of the present application, the outer end of the circulation fan is fixedly connected with a motor. The output shaft of the motor is fixedly connected with a pulley. The inner ends of the plurality of clamping gears are all rotatably connected with a main transmission shaft. The outer end of the main transmission shaft is fixedly connected with a plurality of pulleys. And the outer ends of the pulleys are rotatably connected with a belt, and the belt is rotatably connected with the pulley on the output shaft of the motor.

[0011] As another improvement of the present application, the outer end of the cover plate is fixedly connected with a plurality of symmetrically arranged exhaust pipes. And the exhaust pipes penetrate through the cover plate and are communicated with the cavity formed by the heat preservation layer and the inner housing. The end of the exhaust pipe away from the cover plate is fixedly connected with the circulation fan.

[0012] As a supplementary improvement of another improvement of the present application, the outer end of the cover plate is fixedly connected with a plurality of symmetrically arranged intake pipes. And the intake pipes penetrate through the cover plate and are communicated with the cavity formed by the outer housing and the heat preservation layer. The end of the intake pipe away from the cover plate is fixedly connected with the circulation fan. A branch pipe is arranged in the middle of the intake pipe. And the outer end of the branch pipe is fixedly connected with a stop valve. A stop valve is fixedly connected to the end of the intake pipe close to the circulation fan. And a cooling inlet pipe is fixedly connected to the outer end of the circulation fan. A stop valve is fixedly connected to the cooling inlet pipe.

[0013] As a supplement to another improvement of the present application, a plurality of counterbores are provided at the outer end of the main transmission shaft, and the counterbores are circumferentially arrayed around the axis of the main transmission shaft. A spring is slidably connected to the inner wall of the counterbore, a steel ball is disposed in contact with the top end of the spring, a plurality of arc grooves are provided at the inner end of the clamping gear, and the arc grooves are circumferentially arrayed around the axis of the clamping gear. The steel ball is disposed in contact with the arc groove.

[0014] It includes the following steps;

[0015] S1. Automatic centering and clamping;

[0016] S2. Active preheating;

[0017] S3. Symmetrical welding;

[0018] S4. Uniform cooling.

[0019] In summary, the present solution has the following beneficial effects:

[0020] 1. Automatic positioning and clamping; through the symmetrical gear-rack mechanism, the clamping of the aluminum alloy pipes to be welded at both ends is realized, and centering is completed through the V-shaped groove, ensuring accurate alignment and stable fixation before welding, and improving the welding accuracy and quality.

[0021] 2. Efficient preheating; the electric heating wire heats the gas passing through the diversion pipe, and the heat is evenly distributed through the diversion pipe. Combined with the assistance of the circulation fan, uniform preheating of the aluminum alloy pipe is realized, effectively reducing welding defects and improving the welding performance of the material.

[0022] 3. Dynamic thermal management; the intelligent control of the exhaust pipe and the intake pipe, combined with the use of the circulation fan, forms an efficient thermal management system, which can not only accelerate the preheating process, but also ensure uniform cooling after welding, improving work efficiency and product quality. By controlling the rotation speed of the circulation fan by the motor and adjusting it in real time according to the data of the temperature sensor, accurate control of the temperature in the welding area is realized, avoiding thermal stress concentration and material deformation.

[0023] 4. Reducing welding stress; the preheating and uniform cooling strategies significantly reduce the thermal stress during welding, improving the stability and dimensional accuracy of the welded structure.

[0024] 5. Improving welding efficiency; the symmetrical arrangement of the welding torches and the rotary welding technology ensure the uniform distribution of welding heat. The symmetrical arrangement of the welding torch design and the precise positioning of the drive system achieve fast and efficient symmetrical welding, not only improving the welding speed, but also ensuring the uniformity and aesthetics of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the first partial view of the present application;

[0026] Figure 2This is the second partial view of the present application;

[0027] Figure 3 This is the third partial view of the present application;

[0028] Figure 4 This is the top view of the present application;

[0029] Figure 5 This is the A-A cross-sectional view of the present application;

[0030] Figure 6 This is the B-B cross-sectional view of the present application;

[0031] Figure 7 This is the C-C cross-sectional view of the present application;

[0032] Figure 8 This is the enlarged view at D of the present application;

[0033] Figure 9 This is the overall structural schematic diagram of the present application.

[0034] Explanation of the reference numerals in the figure:

[0035] 1. Outer housing; 2. Welding ring; 3. Welding torch; 4. Tooth ring; 5. Driving gear; 6. Driving motor; 7. Heat insulation layer; 8. Diversion pipe; 9. Heating wire; 10. Cover plate; 11. Inner housing; 12. Aluminum alloy pipe; 13. Frame; 14. First rack; 15. Clamping gear; 16. Second rack; 17. Upper clamping plate; 18. Lower clamping plate; 19. Circulation fan; 20. Motor; 21. Main transmission shaft; 22. Exhaust pipe; 23. Intake pipe; 24. Counterbore; 25. Spring; 26. Steel ball; 27. Arc-shaped groove. Detailed implementation manners

[0036] The following will make a detailed description of three implementation manners of the present application with reference to the accompanying drawings.

[0037] The first implementation manner:

[0038] Figures 1-9 Shown.

[0039] An aluminum alloy profile welding device includes a housing 1. The inner wall of the housing 1 is rotatably connected to a welding ring 2. The inner end of the welding ring 2 is fixedly connected with a plurality of welding torches 3, and the welding torches 3 are symmetrically arranged on the same horizontal plane. The outer wall of the welding ring 2 is fixedly connected with a toothed ring 4. The outer end of the toothed ring 4 is meshed with a driving gear 5. The inner end of the driving gear 5 is fixedly connected with a driving motor 6 through a transmission shaft. The inner wall of the welding ring 2 is rotatably connected to a heat preservation layer 7. The inner wall of the heat preservation layer 7 is fixedly connected with a plurality of diversion pipes 8. The diversion pipes 8 are distributed in a circumferential array around the axis of the heat preservation layer 7, and the diversion pipes 8 penetrate through the heat preservation layer 7 and are communicated with the cavity formed by the housing 1 and the heat preservation layer 7. The plurality of circumferentially arrayed diversion pipes 8 are linearly arrayed along the axis of the heat preservation layer 7. The outer walls of the plurality of diversion pipes 8 are wound with heating wires 9. One end of the heat preservation layer 7 away from the welding torch 3 is fixedly connected with a cover plate 10, and the cover plate 10 is fixedly connected with the housing 1. The inner wall of the cover plate 10 is fixedly connected with an inner housing 11. The diversion pipe 8 penetrates through the inner housing 11 and is fixedly connected with the inner housing 11. An aluminum alloy pipe 12 is in contact with the inner end of the cover plate 10.

[0040] The housing 1 provides the overall framework of the device, protecting the internal structure from the external environment. The housing 1 is made of cast iron, having good mechanical strength and stability. The housing 1 is rotatably connected to the welding ring 2, facilitating the flexible adjustment of the welding torch 3 and the all-round welding of the workpiece, while maintaining the stability of the welding process, improving the welding efficiency and quality. The welding torch 3 is used to emit welding energy to complete the fusion welding of the aluminum alloy pipe 12. The toothed ring 4 and the driving gear 5 serve as a driving mechanism to ensure that the welding ring 2 and the welding torch 3 can move precisely along a predetermined trajectory, improving the automation degree and welding accuracy of the welding. The driving motor 6 provides power for the entire welding system, controlling the rotation speed of the welding ring 2. The heat preservation layer 7 reduces the heat loss during preheating, keeps the temperature of the welding area stable, and improves the welding quality. The heat preservation layer 7 is made of high-temperature resistant ceramic fiber and is coated on the outside. The diversion pipe 8 guides the gas to circulate, enabling the gas to uniformly preheat and cool the aluminum alloy pipe 12. The heating wire 9 heats the diversion pipe 8, and then the diversion pipe 8 evenly distributes the heat to the welding area, effectively controlling the welding temperature, reducing the heat affected zone, preventing the thermal deformation of the aluminum alloy material, and improving the welding quality. The cover plate 10 provides support for the inner housing 11.

[0041] The second implementation mode:

[0042] Figures 1-9 Shown.

[0043] The outer end of the cover plate 10 is fixedly connected with a frame 13. The inner wall of the frame 13 is fixedly connected with a plurality of first racks 14. A plurality of first racks 14 are all meshed with a clamping gear 15. The clamping gear 15 is meshed with a second rack 16. The outer end of the second rack 16 is fixedly connected with an upper clamping plate 17.

[0044] The V-shaped groove at the bottom end of the upper clamping plate 17 is in contact with the aluminum alloy pipe 12. The bottom end of the frame 13 is fixedly connected with a lower clamping plate 18. The V-shaped groove of the lower clamping plate 18 is in contact with the aluminum alloy pipe 12. The inner end of the upper clamping plate 17 is fixedly connected with a circulating fan 19.

[0045] The outer end of the circulating fan 19 is fixedly connected with a motor 20. The output shaft of the motor 20 is fixedly connected with a pulley. The inner ends of multiple clamping gears 15 are all rotatably connected with a main transmission shaft 21. The outer end of the main transmission shaft 21 is fixedly connected with multiple pulleys. And the outer end of the pulley is rotatably connected with a belt, and the belt is rotatably connected with the pulley on the output shaft of the motor 20.

[0046] The outer end of the cover plate 10 is fixedly connected with multiple symmetrically arranged exhaust pipes 22. And the exhaust pipes 22 penetrate through the cover plate 10 and are communicated with the cavity formed by the heat insulation layer 7 and the inner shell 11. One end of the exhaust pipe 22 far away from the cover plate 10 is fixedly connected with the circulating fan 19.

[0047] The outer end of the cover plate 10 is fixedly connected with multiple symmetrically arranged air inlet pipes 23. And the air inlet pipes 23 penetrate through the cover plate 10 and are communicated with the cavity formed by the outer shell 1 and the heat insulation layer 7. One end of the air inlet pipe 23 far away from the cover plate 10 is fixedly connected with the circulating fan 19. A branch pipe is arranged in the middle of the air inlet pipe 23. And the outer end of the branch pipe is fixedly connected with a stop valve. A stop valve is fixedly connected to one end of the air inlet pipe 23 close to the circulating fan 19. And the outer end of the circulating fan 19 is fixedly connected with a cooling inlet pipe. The cooling inlet pipe is fixedly connected with a stop valve.

[0048] Multiple counterbores 24 are formed in the outer end of the main transmission shaft 21. And the counterbores 24 are distributed in a circumferential array around the axis of the main transmission shaft 21. The inner wall of the counterbore 24 is slidably connected with a spring 25. The top end of the spring 25 is in contact with a steel ball 26. Multiple arc-shaped grooves 27 are formed in the inner end of the clamping gear 15. And the arc-shaped grooves 27 are distributed in a circumferential array around the axis of the clamping gear 15. The steel ball 26 is in contact with the arc-shaped groove 27.

[0049] The frame 13, the first rack 14, and the second rack 16 form a clamping mechanism. Through the cooperation of the gear and the rack, the upper clamping plate 17 and the lower clamping plate 18 achieve precise centering and stable clamping of the aluminum alloy pipe 12, ensuring the position stability during the welding process. The V-shaped grooves on the upper clamping plate 17 and the lower clamping plate 18 are designed to fasten and position the aluminum alloy pipe 12, guaranteeing the stability and centering of the pipe fittings during the welding process, and avoiding welding quality problems caused by sliding or offset. The circulation fan 19 and the motor 20, the circulation fan 19 is driven by the motor 20 to introduce or exhaust air in the welding area for preheating or auxiliary cooling, control the temperature of the welding area, and at the same time promote the emission of welding fumes, improving the working environment. The exhaust pipe 22 is used to discharge the hot air during the welding process, and the intake pipe 23 introduces the cooling air flow. The two work together for thermal management, improving the welding quality and operation safety. The stop valve regulates the air flow in and out to control the air flow balance in the welding area. The valve is closed for circulating heating during preheating, and external cold air is connected for cooling during uniform cooling. The main drive shaft 21 and the clamping gear 15 simultaneously complete the power transmission during centering clamping, preheating, and cooling. The transmission mechanism composed of the spring 25, the steel ball 26, and the arc-shaped groove 27, when the centering clamping is completed, while ensuring stable clamping, enables the main drive shaft 21 to continue rotating to complete the power transmission and prevent the main drive shaft 21 from being twisted off.

[0050] The third implementation mode

[0051] Figures 1-9 shown.

[0052] including the following steps;

[0053] S1. Automatic centering clamping;

[0054] When the aluminum alloy pipe 12 to be welded is placed on the lower clamping plate 18, the motor 20 is started. The motor 20 drives the belt pulley to drive the main drive shaft 21 to rotate. The main drive shaft 21 rotates to drive the clamping gear 15 to rotate. The clamping gear 15 drives the second rack 16 to move downward. The second rack 16 drives the upper clamping plates 17 at both ends of the device to move downward synchronously, achieving precise centering and clamping of the aluminum alloy pipe 12. The V-shaped groove design ensures a tight fit with the aluminum alloy pipe 12, guaranteeing stable fixation before welding and improving the welding accuracy.

[0055] S2. Active preheating;

[0056] After the centering and clamping of the aluminum alloy pipe 12 are completed, the heating wire 9 in the thermal insulation layer 7 is energized for heating. At the same time, the motor 20 continues to drive the belt pulley to rotate. When the upper clamping plate 17 moves in place and the clamping is completed, the main transmission shaft 21 continues to rotate. The spring 25 in the main transmission shaft 21 contracts, and the steel ball 26 moves downward along the counterbore 24. At this time, the clamping gear 15 stops rotating, and the main transmission shaft 21 continues to rotate. At the same time, the circulating fans 19 at both ends of the driving device rotate, so that the heated gas circulates, and the gas flowing through the diversion pipe 8 is heated by the heating wire 9 and then evenly preheats the aluminum alloy pipe 12. The multiple diversion pipes 8 make the heat distribution more uniform, effectively reducing the thermal stress during the welding process and improving the welding quality. The preheating process helps to improve the welding performance of the aluminum alloy material and reduce welding defects. The preheated gas flows back into the cavity formed by the thermal insulation layer 7 and the inner housing 11 through the inner housing 11, and is reheated by the heating wire 9 again. After heating, it enters the circulating fan 19 through the exhaust pipe 22, and is accelerated by the circulating fan 19 and flows back into the cavity formed by the outer housing 1 and the thermal insulation layer 7 through the intake pipe 23, and then enters the diversion pipe 8 again to be continuously heated by the heating wire 9 to continuously preheat the aluminum alloy pipe 12.

[0057] S3. Symmetrical welding;

[0058] After the preheating is completed, the heating wire 9 is powered off, the motor 20 stops rotating, the driving motor 6 is started to drive the driving gear 5 to rotate, the driving gear 5 drives the toothed ring 4 to rotate, and after the toothed ring 4 drives the welding torch 3 to rotate 180 degrees, welding is performed on the symmetrical position of the aluminum alloy pipe 12. The symmetrical arrangement of the welding torches 3 ensures the balanced application of welding heat, reduces local overheating, improves the stability and efficiency of welding, and at the same time ensures the beauty and strength of the weld.

[0059] S4. Uniform cooling;

[0060] After the welding is completed, the motor 20 continues to drive the circulating fans 19 to rotate. At this time, the stop valve on the exhaust pipe 22 is closed, the stop valve on the branch pipe is opened, and the stop valve on the cooling inlet pipe is opened at the same time. At this time, the cold air enters from the cooling inlet, passes through the intake pipe 23 and enters the cavity formed by the outer housing 1 and the thermal insulation layer 7, and then enters the diversion pipe 8 to cool the aluminum alloy pipe 12, discharging the hot air in the inner housing 11. The hot air enters the cavity formed by the thermal insulation layer 7 and the inner housing 11, then enters the exhaust pipe 22 and enters the branch pipe, and finally is discharged into the air from the branch pipe. In this way, the aluminum alloy pipe 12 is cooled in a cycle. According to the data of the temperature sensor, the rotation speed of the circulating fan 19 can be adjusted in real time to control the wind speed, forming an effective cooling cycle, which helps to control the cooling rate, avoid welding stress concentration and deformation caused by rapid cooling, ensure the structural stability and dimensional accuracy of the aluminum alloy pipe 12, and at the same time the uniform flow of the circulating air also helps the uniform cooling of the weld area, improving the mechanical properties and corrosion resistance of the welded product.

[0061] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the protection scope is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An aluminum alloy profile welding device, characterized in that: It includes a housing (1). A welding ring (2) is rotatably connected to the inner wall of the housing (1). A plurality of welding torches (3) are fixedly connected to the inner end of the welding ring (2), and the welding torches (3) are symmetrically arranged on the same horizontal plane. A toothed ring (4) is fixedly connected to the outer wall of the welding ring (2). A driving gear (5) is meshed with the outer end of the toothed ring (4). The inner end of the driving gear (5) is fixedly connected to a driving motor (6) through a transmission shaft. A heat preservation layer (7) is rotatably connected to the inner wall of the welding ring (2). A plurality of flow guide pipes (8) are fixedly connected to the inner wall of the heat preservation layer (7). The flow guide pipes (8) are arranged in a circumferential array around the axis of the heat preservation layer (7), and the flow guide pipes (8) penetrate through the heat preservation layer (7) and are communicated with the cavity formed by the housing (1) and the heat preservation layer (7). The plurality of circumferentially arrayed flow guide pipes (8) are linearly arrayed along the axis of the heat preservation layer (7). Electric heating wires (9) are wound around the outer walls of the plurality of flow guide pipes (8). One end of the heat preservation layer (7) away from the welding torch (3) is fixedly connected to a cover plate (10), and the cover plate (10) is fixedly connected to the housing (1). An inner housing (11) is fixedly connected to the inner wall of the cover plate (10). The flow guide pipe (8) penetrates through the inner housing (11) and is fixedly connected to the inner housing (11). An aluminum alloy pipe (12) is in contact with the inner end of the cover plate (10).

2. The aluminum alloy profile welding equipment according to claim 1, characterized in that: A frame (13) is fixedly connected to the outer end of the cover plate (10). A plurality of first racks (14) are fixedly connected to the inner wall of the frame (13). A plurality of the first racks (14) are all meshed with a clamping gear (15). The clamping gear (15) is meshed with a second rack (16). An upper clamping plate (17) is fixedly connected to the outer end of the second rack (16).

3. An aluminum alloy profile welding device according to claim 2, characterized in that: The V-shaped groove at the bottom end of the upper clamping plate (17) is in contact with the aluminum alloy pipe (12). A lower clamping plate (18) is fixedly connected to the bottom end of the frame (13). The V-shaped groove of the lower clamping plate (18) is in contact with the aluminum alloy pipe (12). A circulating fan (19) is fixedly connected to the inner end of the upper clamping plate (17).

4. A welding device for aluminum alloy profiles according to claim 3, characterized in that: A motor (20) is fixedly connected to the outer end of the circulating fan (19). A belt pulley is fixedly connected to the output shaft of the motor (20). The inner ends of the plurality of clamping gears (15) are all rotatably connected to a main transmission shaft (21). Belt pulleys are fixedly connected to the outer ends of the main transmission shaft (21), and belt pulleys are rotatably connected to the outer ends of the belt pulleys, and the belt is rotatably connected to the belt pulley on the output shaft of the motor (20).

5. An aluminum alloy profile welding device according to claim 1, characterized in that: A plurality of symmetrically arranged exhaust pipes (22) are fixedly connected to the outer end of the cover plate (10). The exhaust pipes (22) penetrate through the cover plate (10) and are communicated with the cavity formed by the heat preservation layer (7) and the inner housing (11). One end of the exhaust pipe (22) away from the cover plate (10) is fixedly connected to the circulating fan (19).

6. The aluminum alloy profile welding equipment according to claim 1, characterized in that: A plurality of symmetrically arranged intake pipes (23) are fixedly connected to the outer end of the cover plate (10), and the intake pipes (23) penetrate through the cover plate (10) and communicate with the cavity formed by the outer housing (1) and the heat insulation layer (7). One end of the intake pipe (23) far from the cover plate (10) is fixedly connected to a circulation fan (19). A branch pipe is provided in the middle of the intake pipe (23), and a stop valve is fixedly connected to the outer end of the branch pipe. A stop valve is fixedly connected to one end of the intake pipe (23) close to the circulation fan (19), and a cooling inlet pipe is fixedly connected to the outer end of the circulation fan (19). A stop valve is fixedly connected to the cooling inlet pipe.

7. An aluminum alloy profile welding device according to claim 4, characterized in that: A plurality of counterbores (24) are formed in the outer end of the main transmission shaft (21), and the counterbores (24) are circumferentially and arrayed around the axis of the main transmission shaft (21). A spring (25) is slidably connected to the inner wall of the counterbore (24). A steel ball (26) is arranged in contact with the top end of the spring (25). A plurality of arc-shaped grooves (27) are formed in the inner end of the clamping gear (15), and the arc-shaped grooves (27) are circumferentially and arrayed around the axis of the clamping gear (15). The steel ball (26) is arranged in contact with the arc-shaped groove (27).

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