Automobile high-strength aluminum alloy frame welding equipment

Abstract

The invention discloses automobile high-strength aluminum alloy frame welding equipment, which relates to the technical field of welding, and comprises a conveying platform for conveying an automobile frame; the fixed stand columns are fixed to the two sides of the conveying platform. The sliding adjusting plate is arranged on the fixed stand column in a sliding mode; the welding device is rotationally arranged on the sliding adjusting plate; the control connecting assembly is rotationally arranged on the welding device; the pretreatment device is rotationally arranged on one side of the control connecting assembly; and the cooling device is rotationally arranged on the other side of the control connecting assembly and is symmetrical to the pretreatment device relative to the control connecting assembly. Welding positions of different positions are cleaned before welding, controllable cooling treatment is carried out after welding, crack generation and expansion are effectively reduced, and the welding quality and the structural strength are improved.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and more specifically, to a welding device for high-strength aluminum alloy frames of automobiles. Background Art

[0002] With the rapid growth of the new energy vehicle market, the demand for lightweight materials has increased significantly. High-strength aluminum alloy has become a key material for automobile frame manufacturing due to its excellent specific strength and corrosion resistance. Due to the high thermal conductivity, low ionization energy, and laser reflection properties of aluminum alloy, the stability of the aluminum alloy welding process is very poor, resulting in problems such as poor weld formation, large fluctuations in penetration depth, and high weld porosity. Therefore, when laser welding aluminum alloy, surface treatment must be carried out, and the treated aluminum alloy parts need to be welded within a specified time. Otherwise, an oxide film is likely to form again on the part surface, resulting in the need for secondary or even multiple treatments, which is likely to cause repeated processing and waste. After welding, due to the rapid cooling of the weld, cracks are likely to form and crack propagation occurs, directly affecting the welding quality and structural strength, and it is difficult to meet the production requirements of high precision and high efficiency. Therefore, it is necessary to provide a welding device for high-strength aluminum alloy frames of automobiles to solve the problems raised in the above background art. Summary of the Invention

[0003] To achieve the above object, the present invention provides the following technical solution: A welding device for high-strength aluminum alloy frames of automobiles, comprising: A conveying platform for conveying automobile frames; Fixed columns fixed on both sides of the conveying platform; A sliding adjustment plate slidably arranged on the fixed columns; A welding device rotatably arranged on the sliding adjustment plate; A control connection component rotatably arranged on the welding device; A pretreatment device rotatably arranged on one side of the control connection component; A cooling device rotatably arranged on the other side of the control connection component, symmetric with the pretreatment device with respect to the control connection component.

[0004] Further, as a preference, the welding device includes: A connecting outer frame rotatably arranged on the sliding adjustment plate; A welding gun movably arranged within the connecting outer frame.

[0005] Further, as a preference, the control connection component includes: A rotating frame body rotatably arranged on the connecting outer frame; Rotating rods, two of which are symmetrically distributed and rotatably arranged on both sides of the rotating frame body; The adjusting rod is correspondingly arranged with the rotating rod, one end is slidably connected to the rotating rod, and one end is respectively rotatably connected to the corresponding pretreatment device and cooling device.

[0006] Further, as a preference, the pretreatment device includes: The first adjusting and closing mechanism is rotatably connected to the control connection component; The first fixed rotating shaft is fixedly arranged inside the first adjusting and closing mechanism; The cleaning component is rotatably arranged on one side of the first fixed rotating shaft; The dust removal component is symmetrically arranged with the cleaning component and is rotatably arranged on the first fixed rotating shaft.

[0007] Further, as a preference, the cooling device includes: The second adjusting and closing mechanism is rotatably connected to the control connection component and has the same structure as the first adjusting and closing mechanism; The second fixed rotating shaft is fixedly arranged inside the second adjusting and closing mechanism; The atomizing cooling component is rotatably arranged on one side of the second fixed rotating shaft; The conduction cooling component is symmetrically arranged with the atomizing cooling component and is rotatably arranged on the second fixed rotating shaft.

[0008] Further, as a preference, the first adjusting and closing mechanism includes: The fixed arc surface, the center of the top is rotatably connected to the control connection component; The rotating arc surfaces, there are two pieces symmetrically distributed with respect to the fixed arc surface, and are slidably arranged inside the fixed arc surface; The fixed sector surface is fixed at both ends of the fixed arc surface; The rotating sector surfaces are fixed at both ends of the rotating arc surface and are slidably arranged inside the fixed sector surface; The driving rollers, there are two groups symmetrically distributed, are rotatably arranged on the inner wall of the fixed sector surface and are in contact with the inner wall of the rotating arc surface, and arc channels corresponding to the driving rollers are arranged on the rotating sector surface; The connecting shaft rotatably connects two groups of corresponding driving rollers; The telescopic shaft is fixedly connected to the end of the first fixed rotating shaft and the middle of the connecting shaft at both ends.

[0009] Further, as a preference, the cleaning component includes: The first connecting frame is rotatably connected to the side of the first fixed rotating shaft; The cleaning brush groups, there are two groups symmetrically distributed with respect to the middle of the first fixed rotating shaft, and are movably arranged at the bottom of the first connecting frame.

[0010] Further, as a preference, the dust removal component includes: The second connecting frame body is rotatably connected to one side of the first fixed rotating shaft away from the cleaning component; The fixed rod is arranged parallel to the first fixed rotating shaft and is rotatably arranged at the bottom of the second connecting frame body; The rotating collecting groove is fixed on the fixed rod; The extension groove is slidably connected to the notch of the rotating collecting groove.

[0011] Furthermore, as a preference, the atomizing cooling component includes: The third connecting frame is rotatably connected to one side of the second fixed rotating shaft adjacent to the pretreatment device; There are two rotating connecting plates symmetrically distributed about the middle of the second fixed rotating shaft and rotatably arranged in the third connecting frame; There are two groups of spray nozzles symmetrically arranged with the rotating connecting plates, and each group is linearly distributed with multiple spray nozzles fixed on the rotating connecting plates.

[0012] Furthermore, as a preference, the conduction cooling component includes: The fourth connecting frame is rotatably connected to one side of the second fixed rotating shaft away from the atomizing cooling component; There are multiple sliding cooling frames arranged coaxially and slidably arranged with each other; There are two limiting rings symmetrically distributed up and down and respectively fixed on the inner sides of the upper and lower ends of the sliding cooling frame; The positioning ring is fixed on the outer side of the top of the sliding cooling frame, and the positioning ring is located between the limiting rings.

[0013] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, through the arrangement of the control connection component, the pretreatment device, the welding device and the cooling device are controlled simultaneously to work synchronously. After the aluminum alloy welding joint is polished and cleaned, the welding device welds in time, and after the welding is completed, the cooling rate of the weld is controlled, effectively reducing the generation and expansion of cracks and improving the welding quality and structural strength; through the arrangement of the adjustment and closing mechanism, the pretreatment device and the cooling device can be used for welding joints with different included angles, and the welding joints are closed during cleaning and cooling, effectively improving the processing efficiency; through the adjustment of the fixed rotating shaft, the pretreatment device and the cooling device move along paths with different arcs and perform real-time cleaning and cooling, with stronger versatility. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of a welding device for an automotive high-strength aluminum alloy frame; Figure 2 It is a schematic diagram of the structure of the welding device and the control connection component; Figure 3 It is a schematic diagram of the structure of the pretreatment device and the cooling device; Figure 4 Schematic diagram of the structure of the first adjustment and closing mechanism; Figure 5 Schematic diagram of the structure of the cleaning component and the dust removal component; Figure 6 Schematic diagram of the structure of the atomization cooling component; Figure 7 Schematic diagram of the structure of the conduction cooling component; In the figure: 1, conveying platform; 2, fixed column; 3, sliding adjustment plate; 4, welding device; 5, control connection component; 6, pretreatment device; 7, cooling device; 41, connecting outer frame; 42, welding gun; 51, rotating frame body; 52, rotating rod; 53, adjusting rod; 61, first adjustment and closing mechanism; 62, first fixed rotating shaft; 63, cleaning component; 64, dust removal component; 71, second adjustment and closing mechanism; 72, second fixed rotating shaft; 73, atomization cooling component; 74, conduction cooling component; 611, fixed arc surface; 612, rotating arc surface; 613, fixed sector surface; 614, rotating sector surface; 615, driving roller; 616, connecting shaft; 617, telescopic shaft; 631, first connecting frame; 632, cleaning brush group; 641, second connecting frame; 642, fixed rod; 643, rotating collecting groove; 644, extending groove; 731, third connecting frame; 732, rotating connecting plate; 733, spray nozzle; 741, fourth connecting frame; 742, sliding cooling frame; 743, limiting ring; 744, positioning ring. Specific implementation manners

[0015] Please refer to Figures 1 to 7 , in the embodiment of the present invention, a welding device for an automotive high-strength aluminum alloy frame includes: A conveying platform 1 for conveying an automotive frame; Fixed columns 2 fixed on both sides of the conveying platform 1; A sliding adjustment plate 3 slidably arranged on the fixed columns 2; A welding device 4 rotatably arranged on the sliding adjustment plate 3; A control connection component 5 rotatably arranged on the welding device 4; A pretreatment device 6 rotatably arranged on one side of the control connection component 5; A cooling device 7 rotatably arranged on the other side of the control connection component 5, symmetric with respect to the control connection component 5 and the pretreatment device 6.

[0016] In this embodiment, the welding device 4 includes: A connecting outer frame 41 rotatably arranged on the sliding adjustment plate 3; A welding gun 42 movably arranged inside the connecting outer frame 41.

[0017] That is to say, the sliding adjustment plate 3 moves up and down on the fixed column 2 to adjust the height of the welding device 4, and the connecting outer frame 41 rotates on the sliding adjustment plate 3 to drive the welding gun 42 to rotate, so as to adjust the angle of the welding gun 42. Moreover, the welding gun 42 moves in the connecting outer frame 41 to make the welding gun 42 better fit the welding position for welding work.

[0018] In this embodiment, the control connection assembly 5 includes: A rotating frame body 51, rotatably arranged on the connecting outer frame 41; Rotating rods 52, two of which are symmetrically distributed and rotatably arranged on both sides of the rotating frame body 51; Adjusting rods 53, correspondingly arranged with the rotating rods 52, one end is slidably connected to the rotating rod 52, and one end is respectively rotatably connected to the corresponding pretreatment device 6 and cooling device 7.

[0019] That is to say, according to the direction of the welding joint, the rotating frame body 51 rotates, and drives the pretreatment device 6 and the cooling device 7 to fit the welding joint through the rotating rod 52 and the adjusting rod 53. The oxide layer on the surface of the welding joint is cleaned by the pretreatment device 6, and after cleaning, the welding is carried out by the welding device 4. After welding, the cooling device 7 performs controllable cooling on the weld seam, effectively reducing the generation and expansion of cracks, and improving the welding quality and structural strength.

[0020] In this embodiment, the pretreatment device 6 includes: A first adjustment and closing mechanism 61, rotatably connected to the control connection assembly 5; A first fixed rotating shaft 62, fixedly arranged inside the first adjustment and closing mechanism 61; A cleaning component 63, rotatably arranged on one side of the first fixed rotating shaft 62; A dust removal component 64, symmetrically arranged with the cleaning component 63 and rotatably arranged on the first fixed rotating shaft 62.

[0021] That is to say, under the action of the first adjustment and closing mechanism 61, the pretreatment device 6 fits the welding joint with different included angles. When cleaning and removing dust from the surface oxide layer of the welding joint, it remains in a closed state, effectively preventing the splashing of the cleaned debris, making it difficult for the dust removal component 64 to completely remove, which affects the welding quality. Moreover, under the action of the first fixed rotating shaft 62, the cleaning component 63 and the dust removal component 64 are controlled to fit the welding joint. When dealing with welding trajectories with arcs or corners, the cleaning component 63 and the dust removal component 64 are restricted to fit the welding joint for treatment, with stronger versatility and applicability to different welding joints.

[0022] In this embodiment, the cooling device 7 includes: The second adjusting and closing mechanism 71 is rotatably connected to the control connection assembly 5 and has the same structure as the first adjusting and closing mechanism 61; The second fixed rotating shaft 72 is fixedly arranged inside the second adjusting and closing mechanism 71; The atomizing cooling assembly 73 is rotatably arranged on one side of the second fixed rotating shaft 72; The conduction cooling assembly 74 is symmetrically arranged with the atomizing cooling assembly 73 and is rotatably arranged on the second fixed rotating shaft 72.

[0023] That is to say, under the action of the second adjusting and closing mechanism 71, the cooling device 7 is completely attached to the welds to be cooled with different angles. The atomizing cooling assembly 73 rapidly cools the welds to inhibit grain coarsening, and then the conduction cooling assembly 74 conducts cooling to homogenize the structure and eliminate residual stress. And under the action of the second fixed rotating shaft 72, the angles of the atomizing cooling assembly 73 and the conduction cooling assembly 74 are adjusted in real time according to the trajectory of the welding joint, so that the atomizing cooling assembly 73 and the conduction cooling assembly 74 are attached to the welds for cooling.

[0024] In this embodiment, the first adjusting and closing mechanism 61 includes: The fixed arc surface 611 is rotatably connected to the control connection assembly 5 at the center of the top; There are two rotating arc surfaces 612 symmetrically distributed with respect to the fixed arc surface 611 and slidably arranged inside the fixed arc surface 611; The fixed sector surface 613 is fixed at both ends of the fixed arc surface 611; The rotating sector surface 614 is fixed at both ends of the rotating arc surface 612 and slidably arranged inside the fixed sector surface 613; There are two groups of driving rollers 615 symmetrically distributed, rotatably arranged on the inner wall of the fixed sector surface 613 and in contact with the inner wall of the rotating arc surface 612. An arc track corresponding to the driving roller 615 is provided on the rotating sector surface 614; The connecting shaft 616 rotatably connects two corresponding driving rollers 615; The telescopic shaft 617 is fixedly connected to the end of the first fixed rotating shaft 62 and the middle of the connecting shaft 616 at both ends respectively.

[0025] That is to say, when the welding joint is a plane, the two rotating arc surfaces 612 and the rotating sector surfaces 614 on both sides are attached to the planes on both sides of the welding joint to clean the welding joint or cool down the weld; when the included angle of the welding joint is an acute angle, the driving roller 615 rotates to drive the rotating arc surfaces 612 on both sides of the fixed arc surface 611 to rotate towards the middle respectively, and at the same time drive the rotating sector surface 614 to rotate towards the fixed sector surface 613, so that the sides of the two rotating arc surfaces 612 and the rotating sector surface 614 are attached to the planes on both sides of the welding joint. At the same time, the telescopic shaft body 617 contracts to drive the corresponding fixed shaft body to move upward to adapt to the included angle and ensure the normal progress of the cleaning and cooling work; when the included angle of the welding joint is an obtuse angle, the driving roller 615 rotates to drive the rotating arc surfaces 612 on both sides of the fixed arc surface 611 to rotate outwards respectively, and at the same time drive the rotating sector surface 614 to rotate away from the fixed sector surface 613, so that the sides of the two rotating arc surfaces 612 and the rotating sector surface 614 are attached to the planes on both sides of the welding joint. At the same time, the telescopic shaft body 617 drives the corresponding fixed rotating shaft to move and adjust according to the weld position to adapt to the included angle and ensure the normal progress of the cleaning and cooling work.

[0026] In this embodiment, the cleaning assembly 63 includes: The first connection frame 631 is rotatably connected to the side of the first fixed rotating shaft 62; Two groups of cleaning brush sets 632 are symmetrically distributed about the middle of the first fixed rotating shaft 62 and are movably arranged at the bottom of the first connection frame 631.

[0027] That is to say, under the action of the first fixed rotating shaft 62, the first connection frame 631 drives the cleaning brush set 632 to fit against the welding joint. As the cleaning brush set 632 moves back and forth in the first connection frame 631, the oxide layer at the welding joint is removed, and the cleaning brush set 632 can be rotated to adjust the brush head angle so that the cleaning brush set 632 can comprehensively clean the welding joint.

[0028] In this embodiment, the dust removal assembly 64 includes: The second connection frame body 641 is rotatably connected to the side of the first fixed rotating shaft 62 away from the cleaning assembly 63; The fixed rod 642 is arranged in parallel with the first fixed rotating shaft 62 and is rotatably arranged at the bottom of the second connection frame body 641; The rotating collection groove 643 is fixed on the fixed rod 642; The extension groove 644 is slidably connected to the notch of the rotating collection groove 643.

[0029] That is to say, under the action of the first fixed rotating shaft 62, the second connecting frame 641 drives the dust removal assembly 64 to fit towards the welding joint. And a dust suction mechanism is provided in the second connecting frame 641. By rotating the fixed rod 642, the rotating collection groove 643 is driven to fit towards the welding joint. The dust suction mechanism is used to collect and clean the debris. And under the action of the extension groove 644, when the included angle at the welding joint is an acute angle, the extension groove 644 extends out to fit towards the welding joint, better collecting and processing the debris cleaned by the cleaning assembly 63, ensuring the cleanliness of the welding environment.

[0030] In this embodiment, the atomizing cooling assembly 73 includes: A third connecting frame 731, rotatably connected to one side of the second fixed rotating shaft 72 adjacent to the pretreatment device 6; Two rotating connecting plates 732, symmetrically distributed about the middle of the second fixed rotating shaft 72, are rotatably arranged in the third connecting frame 731; Two groups of spray nozzles 733, symmetrically arranged with the rotating connecting plates 732, and each group is linearly distributed with a plurality of them, are fixed on the rotating connecting plates 732.

[0031] That is to say, under the action of the second fixed rotating shaft 72, the third connecting frame 731 drives the atomizing cooling assembly 73 to fit towards the weld. Under the drive of the rotating connecting plates 732, the spray nozzles 733 are driven to rotate towards the direction where the weld is located, spraying atomized droplets to rapidly cool the weld and inhibit grain coarsening.

[0032] In this embodiment, the conduction cooling assembly 74 includes: A fourth connecting frame 741, rotatably connected to one side of the second fixed rotating shaft 72 away from the atomizing cooling assembly 73; A plurality of sliding cooling frames 742 are coaxially arranged and slidably arranged with each other; Two limiting rings 743 are symmetrically distributed up and down, and are respectively fixed inside the upper and lower ends of the sliding cooling frame 742; A positioning ring 744 is fixed on the outer side of the top of the sliding cooling frame 742, and the positioning ring 744 is located between the limiting rings 743.

[0033] Under the action of the second fixed rotating shaft 72, the fourth connecting frame 741 drives the conduction cooling assembly 74 to fit towards the weld. Under the limitation of the included angle at the position where the weld is located and under the limitation of the limiting rings 743, the inner sliding cooling frame 742 slides on the outer sliding cooling frame 742 through the positioning ring 744, so that the sliding cooling frame 742 fits the weld, conducts cooling on the weld, homogenizes the structure, eliminates residual stress, effectively reduces the generation and expansion of cracks at the weld, and improves the welding quality and structural strength.

[0034] During specific implementation, first, the conveying platform 1 is used to carry and convey the vehicle frame. The positioning fixture is provided on the platform surface to ensure the stability of the frame. The sliding adjustment plate 3 moves up and down on the fixed column 2 to adjust the height of the welding device 4. The connecting outer frame 41 rotates on the sliding adjustment plate 3 to drive the welding gun 42 to rotate, so as to adjust the angle of the welding gun 42. The welding gun 42 moves in the connecting outer frame 41 to make the welding gun 42 better fit the welding position for welding work. Then, the rotating frame body 51 rotates on the connecting outer frame 41 to drive the pretreatment device 6 and the cooling device 7 to adapt to the spatial orientation of the vehicle frame welding joint. Then, according to the included angle at the welding joint, the adjustment and closing mechanism is adjusted. When the welding joint is a plane, the two side rotating arc surfaces 612 and the rotating sector surface 614 remain in the initial position, and the closing is achieved by locking the driving roller 615. When the included angle between the two side planes of the welding joint is an acute angle, the driving roller 615 drives the rotating arc surface 612 to rotate inwards, and the telescopic shaft 617 contracts to adapt to the acute angle weld. When the included angle between the two side planes of the welding joint is an obtuse angle, the driving roller 615 rotates in the reverse direction, driving the rotating arc surface 612 to expand outwards, and the telescopic shaft 617 extends to adapt to the obtuse angle weld structure. Then, the first connecting frame 631 fits the weld seam under the action of the first fixed rotating shaft 62. The cleaning brush group 632 rotates and moves horizontally under the drive of the motor to remove the oxide layer at the welding joint. The second connecting frame 641 is internally provided with a dust suction mechanism. The rotating collection groove 643 fits the weld seam, and the extension groove 644 automatically extends in the case of an acute angle to completely collect the debris. After cleaning and dust removal, the welding is carried out by the welding device 4. After welding, the cooling device 7 moves to the weld seam position. First, the atomization cooling component 73 is started for rapid cooling, and then the conduction cooling component 74 is started for uniform cooling, effectively reducing the generation and expansion of cracks at the weld seam, and improving the welding quality and structural strength.

[0035] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. An automobile high-strength aluminum alloy frame welding device, characterized in that: Including: A conveying platform (1) for conveying the vehicle frame; Fixed columns (2) fixed on both sides of the conveying platform (1); A sliding adjustment plate (3) slidably arranged on the fixed columns (2); A welding device (4) rotatably arranged on the sliding adjustment plate (3); A control connection assembly (5) rotatably arranged on the welding device (4); A pretreatment device (6) rotatably arranged on one side of the control connection assembly (5); A cooling device (7) rotatably arranged on the other side of the control connection assembly (5), symmetric with the pretreatment device (6) with respect to the control connection assembly (5).

2. The welding equipment for a high-strength aluminum alloy vehicle frame according to claim 1, characterized in that: The welding device (4) includes: A connecting outer frame (41) rotatably arranged on the sliding adjustment plate (3); A welding gun (42) movably arranged inside the connecting outer frame (41).

3. The welding device for the high-strength aluminum alloy vehicle frame according to claim 2, wherein: The control connection assembly (5) includes: A rotating frame body (51) rotatably arranged on the connecting outer frame (41); Two rotating rods (52) symmetrically distributed and rotatably arranged on both sides of the rotating frame body (51); Adjusting rods (53) correspondingly arranged with the rotating rods (52), one end slidably connected to the rotating rod (52), and one end respectively rotatably connected to the corresponding pretreatment device (6) and cooling device (7).

4. A welding device for a high-strength aluminum alloy vehicle frame according to claim 1, characterized in that: The pretreatment device (6) includes: A first adjusting and closing mechanism (61) rotatably connected to the control connection assembly (5); A first fixed rotating shaft (62) fixedly arranged inside the first adjusting and closing mechanism (61); A cleaning component (63) rotatably arranged on one side of the first fixed rotating shaft (62); A dust removal component (64) symmetrically arranged with the cleaning component (63) and rotatably arranged on the first fixed rotating shaft (62).

5. The welding equipment for a high-strength aluminum alloy vehicle frame according to claim 4, wherein: The cooling device (7) includes: A second adjusting and closing mechanism (71) rotatably connected to the control connection assembly (5) and having the same structure as the first adjusting and closing mechanism (61); A second fixed rotating shaft (72) fixedly arranged inside the second adjusting and closing mechanism (71); An atomizing cooling component (73) rotatably arranged on one side of the second fixed rotating shaft (72); A conduction cooling component (74) symmetrically arranged with the atomizing cooling component (73) and rotatably arranged on the second fixed rotating shaft (72).

6. The welding equipment for the high-strength aluminum alloy vehicle frame according to claim 4, characterized in that: The first adjusting and closing mechanism (61) includes: A fixed arc surface (611) with its top center rotatably connected to the control connection assembly (5); Two rotating arc surfaces (612) symmetrically distributed with respect to the fixed arc surface (611) and slidably arranged inside the fixed arc surface (611); Fixed sector surfaces (613) fixed at both ends of the fixed arc surface (611); Rotating sector surfaces (614) fixed at both ends of the rotating arc surface (612) and slidably arranged inside the fixed sector surfaces (613); Two groups of driving rollers (615) symmetrically distributed and rotatably arranged on the inner wall of the fixed sector surface (613) and in contact with the inner wall of the rotating arc surface (612), and arc channels corresponding to the driving rollers (615) are provided on the rotating sector surface (614); A connecting shaft (616) rotatably connecting two groups of corresponding driving rollers (615); The telescopic shaft (617) is fixedly connected to the end of the first fixed rotating shaft (62) and the middle part of the connecting shaft (616) at both ends respectively.

7. A welding device for a high-strength aluminum alloy vehicle frame according to claim 4, characterized in that: The cleaning assembly (63) includes: The first connecting frame (631) is rotatably connected to the side of the first fixed rotating shaft (62); Two sets of cleaning brush groups (632) are symmetrically distributed about the middle part of the first fixed rotating shaft (62) and are movably arranged at the bottom of the first connecting frame (631).

8. A welding device for a high-strength aluminum alloy vehicle frame according to claim 7, characterized in that: The dust removal assembly (64) includes: The second connecting frame body (641) is rotatably connected to the side of the first fixed rotating shaft (62) far from the cleaning assembly (63); The fixed rod (642) is arranged parallel to the first fixed rotating shaft (62) and is rotatably arranged at the bottom of the second connecting frame body (641); The rotating collection groove (643) is fixed on the fixed rod (642); The extension groove (644) is slidably connected to the notch of the rotating collection groove (643).

9. An automobile high-strength aluminum alloy frame welding device according to claim 5, characterized in that: The atomizing cooling assembly (73) includes: The third connecting frame (731) is rotatably connected to the side of the second fixed rotating shaft (72) adjacent to the pretreatment device (6); Two rotating connecting plates (732) are symmetrically distributed about the middle part of the second fixed rotating shaft (72) and are rotatably arranged in the third connecting frame (731); Two sets of spray nozzles (733) are symmetrically arranged with the rotating connecting plates (732), and each set is linearly distributed with a plurality of spray nozzles and is fixed on the rotating connecting plates (732).

10. A welding device for an automotive high-strength aluminum alloy frame according to claim 9, characterized in that: The conduction cooling assembly (74) includes: The fourth connecting frame (741) is rotatably connected to the side of the second fixed rotating shaft (72) far from the atomizing cooling assembly (73); A plurality of sliding cooling frames (742) are coaxially arranged and are slidably arranged with each other; Two limiting rings (743) are symmetrically distributed up and down and are respectively fixed on the inner sides of the upper and lower ends of the sliding cooling frame (742); The positioning ring (744) is fixed on the outer side of the top of the sliding cooling frame (742), and the positioning ring (744) is located between the limiting rings (743).

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