A welding device for aluminum alloy profile machining

Abstract

The application provides a welding device for aluminum alloy profile machining, and belongs to the technical field of welding devices.The welding device comprises a rack, a welding head, a controller and a profile pipe fitting, and further comprises a positioning and overturning assembly, a concussion cooling assembly and a limiting counting assembly.The application can directly weld four seams of the profile without re-clamping, and the welding period is shortened.When the welding seam is welded, the ball of the concussion cooling assembly is in contact with the profile surface by being pushed by gas, and the piston rod forms high-frequency vibration by gas pressure building and pressure releasing reset, which reduces the weld bubble rate on the one hand and enhances the aluminum alloy molten pool fluidity on the other hand;the vibration continuously acts on the weld to release residual stress, and uniform cooling is achieved, so that profile deformation caused by stress concentration can be avoided;in addition, the gas discharged from the air vent is not wasted, but is introduced into the gas collecting cylinder and is directionally blown to the weld through the air jet pipe, so that the weld is cleaned, the weld residual heat is quickly taken away, and a protective inert atmosphere is formed by continuous air blowing.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and more specifically, to a welding device for processing aluminum alloy profiles. Background Technology

[0002] Aluminum alloy profiles are a type of metallic material made from aluminum as the base material, with the addition of other alloying elements such as copper, magnesium, and zinc, and processed through smelting, extrusion, and aging treatment. They are lightweight, high-strength, corrosion-resistant, have good processing properties, and excellent thermal and electrical conductivity, making them widely used in various fields. To meet usage requirements, two aluminum alloy profiles are often joined together in a V-shape and welded to form a V-shaped aluminum alloy profile frame.

[0003] When welding V-shaped aluminum alloy profile frames, traditional welding equipment can typically only complete the welding of the top surface and the front and rear side joints. The bottom joint is obstructed by the profile frame's own structure (the triangular area formed by the inclined arm and the crossbeam), requiring manual disassembly and re-clamping adjustment. During multiple clamping processes, the profile frame needs to be frequently disassembled and re-fixed, which is not only time-consuming but also causes weld misalignment due to changes in the positioning reference. In addition, during aluminum alloy profile welding, the molten pool at high temperatures (>300℃) easily reacts with oxygen in the air to form an Al2O3 oxide film (melting point 2050℃), which hinders the bonding of liquid metal and leads to incomplete fusion defects. Existing technologies often use air blowing to cover the molten pool, but this easily creates dead airflow corners at weld corners and recesses, resulting in high porosity, which seriously affects the airtightness of the weld. Furthermore, residual stress concentration at the weld eventually leads to deformations such as warping and cracking, requiring manual correction.

[0004] How to invent a welding device for processing aluminum alloy profiles to solve these problems has become an urgent issue for those skilled in the art. Summary of the Invention

[0005] To overcome the above deficiencies, the present invention provides a welding apparatus for processing aluminum alloy profiles, which aims to solve the problems mentioned in the background.

[0006] This invention is implemented as follows:

[0007] This invention provides a welding device for processing aluminum alloy profiles, comprising a frame, a welding head, a controller, and profile fittings. A six-axis moving mechanism for controlling the movement of the welding head is fixedly mounted on the frame. A connecting frame is provided at the moving end of the six-axis moving mechanism, and an adjusting mechanism is mounted on one side of the connecting frame. The output end of the adjusting mechanism is fixedly connected to one side of the welding head. An air supply device and a support platform are mounted on the frame. An air distribution plate is connected to the air supply end of the air supply device, and multiple air guide hoses are connected to the air distribution plate. The device also includes:

[0008] Positioning and flipping assembly: The positioning and flipping assembly is disposed on the frame and the support platform;

[0009] Oscillating cooling component: The oscillating cooling component is disposed on the positioning and flipping component;

[0010] Limit counting component: The limit counting component is disposed on the oscillation cooling component.

[0011] Preferably, the positioning and flipping assembly includes a U-shaped frame, a flipping mechanism, and a bearing seat mounted on a support platform. The U-shaped frame has a hollow area in the middle. Connecting rods are fixedly connected to both sides of the U-shaped frame, and the connecting rods are rotatably connected to the bearing seat. Connecting support plates are fixedly connected to both sides of the U-shaped frame. The connecting support plates are provided with positioning plates and clamping mechanisms for fixing profile fittings. The positioning plates are fixedly connected to the top wall of the connecting support plates. The distance between the positioning plates matches the profile fitting. A top plate is provided on the top of one of the positioning plates. The top plate is rotatably connected to the top of the positioning plate by a limiting bolt, and the limiting bolt is rotatably engaged with the positioning plate.

[0012] Preferably, the clamping mechanism includes a clamping drive unit and a limiting slide groove opened on the connecting support plate. Two clamping plates are symmetrically arranged inside the limiting slide groove. The clamping plates are slidably connected to the limiting slide groove. The clamping drive unit is connected to the two clamping plates and can drive the two clamping plates to move towards or away from each other along the limiting slide groove to achieve clamping or loosening of the profile pipe fitting.

[0013] Preferably, the flipping mechanism includes a housing, a flipping motor, and a worm gear, wherein one end of the connecting rod passes through and extends into the interior of the housing, the worm gear is fixed to the connecting rod, a mounting plate is fixedly connected to the interior of the housing, the flipping motor is fixedly mounted on the mounting plate, a worm is fixedly connected to the output end of the flipping motor, and the worm and the worm gear are meshed together.

[0014] Preferably, the top plate experiences continuous frictional resistance when rotating relative to the positioning plate. This resistance is configured to support the top plate at any angle within its opening range, and requires a certain force to continue rotating.

[0015] Preferably, the oscillating cooling assembly includes a cylinder and an air collecting cylinder. An installation sleeve is fixedly connected to one side of the cylinder, and the cylinder is fixed to a connecting support plate or top plate via the installation sleeve. An air source interface is installed at the lower end of the cylinder, and the end of the air guide hose is inserted into the air source interface and communicates with the inner cavity of the cylinder through the air source interface. A piston rod is slidably and sealed inside the cylinder, and the piston part of the piston rod is elastically connected to the top wall of the inner cavity of the cylinder via a spring. A slot matching the rod part of the piston rod is provided at the top of the cylinder, and a ball is rotatably engaged at the end of the piston rod. A connecting pipe is fixedly connected to the lower end of the piston rod, and an air guide hole is opened on the lower side wall of the connecting pipe. Several ventilation slots are spaced apart on the lower outer side wall of the cylinder, and the ventilation slots are located below the piston rod.

[0016] Preferably, the connecting support plate and the top plate have through holes that match the rod portion of the piston rod. When the spring is in its initial state, the lower end of the connecting tube is inserted into the air source interface. At this time, the air guide hole is located inside the air source interface. The distance between the end face of the ball and the profile fitting is greater than the length of the connecting tube inserted into the air source interface. The cross-sectional area of ​​the air groove is greater than the cross-sectional area of ​​the air source interface.

[0017] Preferably, the gas collecting cylinder is fixed to the lower outer side of the cylinder body, one end of the gas collecting cylinder is connected to a jet pipe, the end of the jet pipe is set towards the weld of the profile fitting, and the jet pipe is a metal shaped flexible hose.

[0018] Preferably, the limit counting assembly includes a pressure plate fixedly connected to the outside of the piston rod and a trigger counter fixedly installed on the top of the piston rod, wherein the trigger counter, the controller, and the air supply device are electrically connected.

[0019] Preferably, when the spring is in its initial state, the pressure plate is in contact with the trigger counter, and when the end face of the ball is in contact with the profile tube, there are gaps between the pressure plate and the connecting support plate, and between the pressure plate and the top plate.

[0020] The beneficial effects of this invention are:

[0021] 1. This application places the V-shaped profile frame between the positioning plates of the U-shaped frame and clamps it from the root of the inclined arms on both sides through a clamping mechanism. The top plate is adjusted to fit the top surface according to the V-shaped angle to achieve initial positioning. At this time, the six-axis moving mechanism can first weld the top surface joint and the joints on the front and rear sides. When the bottom surface joint needs to be welded, the controller starts the flipping mechanism to drive the U-shaped frame to flip so that the bottom surface of the V-shaped profile frame faces upward. Since the profile is always positioned with the initial clamping reference during the flipping process, there is no need to readjust. The six-axis moving mechanism can directly drive the welding head to weld the bottom surface joint, saving the re-clamping process. The welding cycle of a single V-shaped profile frame is shortened, which is especially suitable for mass production.

[0022] 2. During welding, the sphere of the oscillating cooling component contacts the profile surface through gas propulsion. The piston rod generates high-frequency vibration through gas pressure building and depressurization reset. The vibration is transmitted to the molten pool through the profile, breaking the surface tension of the liquid metal and causing bubbles such as hydrogen and carbon monoxide to rise and escape, thus reducing the bubble rate. On the other hand, it enhances the fluidity of the aluminum alloy molten pool, allowing the liquid metal to fill the weld gap more evenly, effectively solving problems such as incomplete fusion and slag inclusions caused by poor aluminum alloy fluidity. It is especially suitable for complex welds such as V-shaped corners that are prone to gas accumulation. After welding, the vibration continues to act on the solid high-temperature weld, releasing residual stress through slight plastic deformation. Combined with uniform cooling, it can prevent profile deformation caused by stress concentration in the V-shaped frame. In addition, the gas released from the ventilation slot is not wasted, but is introduced into the gas collection cylinder and blown directionally towards the weld through the jet pipe to clean the weld, quickly remove the residual heat of the weld, significantly shorten the high-temperature residence time, and avoid grain coarsening. At the same time, the inert atmosphere formed by continuous blowing prevents secondary oxidation of the weld during the cooling process, avoiding surface blackening and roughness.

[0023] 3. Each time the piston rod completes one up-and-down cycle, the pressure plate will strike and trigger the counter once, sending a pulse signal to the controller. By counting the number of pulses, the controller can accurately know how many vibration impacts each weld point has received. When the number reaches the preset value, the controller can automatically close the solenoid valve of the air supply device and stop the vibration treatment at that point. Different thicknesses and materials of aluminum alloy welds have different vibration impact requirements. By controlling the preset number of times, it can be ensured that the vibration impact intensity received by each weld point is uniform, avoiding insufficient or excessive vibration caused by manual operation, and improving the quality stability of batch products. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the flipping mechanism structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the gas supply device and gas distribution plate structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure during the flipping and welding process of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the profile tube fitting of the present invention when it is removed;

[0030] Figure 6 This is a schematic diagram of the clamping mechanism structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the cylindrical body distribution structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the sphere of the present invention when it comes into contact with the profile tube fitting;

[0033] Figure 9 This is the invention Figure 8 Enlarged structural diagram at point A in the middle;

[0034] Figure 10 This is a schematic diagram of the structure when the sphere and the profile tube are separated according to the present invention;

[0035] Figure 11 This is the invention Figure 10 Enlarged structural diagram at point B.

[0036] In the diagram: 1. Frame; 2. Six-axis moving mechanism; 3. Air supply device; 4. Welding head; 5. Support platform; 6. U-shaped frame; 7. Cylinder; 8. Tilting mechanism; 9. Air collection cylinder; 10. Profile fittings; 31. Air distribution plate; 32. Air guide hose; 41. Adjustment mechanism; 51. Bearing seat; 52. Connecting rod; 60. Hollowed-out area; 61. Connecting support plate; 62. Positioning plate; 63. Top plate; 64. Limit bolt; 65. Through 70. Hole; 71. Vent groove; 72. Piston rod; 73. Spring; 74. Trigger counter; 75. Mounting sleeve; 76. Connecting pipe; 77. Air source interface; 81. Housing; 82. Tilting motor; 83. Worm gear; 91. Jet pipe; 611. Limiting slide groove; 612. Clamping plate; 613. Clamping drive unit; 711. Ball; 712. Pressure plate; 751. Air guide hole; 811. Mounting plate; 831. Worm gear. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0038] Example 1, refer to Figures 1-11A welding device for processing aluminum alloy profiles includes a frame 1, a welding head 4, a controller, and profile fittings 10. A six-axis moving mechanism 2 for controlling the movement of the welding head 4 is fixedly installed on the frame 1. A connecting frame is provided at the moving end of the six-axis moving mechanism 2, and an adjusting mechanism 41 is installed on one side of the connecting frame. The output end of the adjusting mechanism 41 is fixedly connected to one side of the welding head 4. The adjusting mechanism 41 can control the rotation of the welding head 4, coordinating with the movement of the six-axis moving mechanism 2 to achieve welding processing of the profile fittings 10. An air supply device 3 and a support platform 5 are installed on the frame 1. An air distribution plate 31 is connected to the air supply end of the air supply device 3, and multiple air guide hoses 32 are connected to the air distribution plate 31. The air supply device 3 distributes gas to each air guide hose 32 through the air distribution plate 31. The device also includes:

[0039] Positioning and flipping assembly: The positioning and flipping assembly is installed on the frame 1 and the support platform 5;

[0040] Oscillating cooling component: The oscillating cooling component is installed on the positioning and flipping component;

[0041] Limit counting component: The limit counting component is installed on the oscillation cooling component.

[0042] Furthermore, the positioning and flipping assembly includes a U-shaped frame 6, a flipping mechanism 8, and a bearing seat 51 mounted on the support platform 5. A hollow area 60 is provided in the middle of the U-shaped frame 6. Connecting rods 52 are fixedly connected to both sides of the U-shaped frame 6, and the connecting rods 52 are rotatably connected to the bearing seat 51. Connecting support plates 61 are fixedly connected to both sides of the U-shaped frame 6. A positioning plate 62 and a clamping mechanism for fixing the profile tube fitting 10 are provided on the connecting support plate 61. The positioning plate 62 is fixedly connected to the top wall of the connecting support plate 61. The distance between the two positioning plates 62 is matched with the profile fitting 10. The profile fitting 10 is placed between the two positioning plates 62 on the connecting support plate 61. The initial positioning is achieved by using the spacing matching characteristics of the positioning plates 62. One of the positioning plates 62 has a top plate 63 on its top. The top plate 63 is rotatably connected to the top of the positioning plate 62 by a limiting bolt 64. The limiting bolt 64 is rotatably engaged with the positioning plate 62. Before placing or removing the profile fitting 10, the top plate 63 needs to be rotated open to remove its obstruction of the profile fitting 10.

[0043] The clamping mechanism includes a clamping drive unit 613 and a limiting groove 611 opened on the connecting support plate 61. Two clamping plates 612 are symmetrically arranged inside the limiting groove 611. The clamping plates 612 are slidably connected to the limiting groove 611. The clamping drive unit 613 is connected to the two clamping plates 612 and can drive the two clamping plates 612 to move towards or away from each other along the limiting groove 611 to clamp or release the profile pipe fitting 10. After the profile pipe fitting 10 is initially positioned, the clamping drive unit 613 (such as a two-way cylinder or a lead screw motor; in this application, a lead screw motor is used) drives the two clamping plates 612 to move towards each other along the limiting groove 611. The clamping force of the clamping plates 612 firmly fixes the profile pipe fitting 10 to prevent displacement during welding. Then, the top plate 63 is rotated to a suitable angle (using frictional resistance to achieve suspension). The top plate 63 limits the top of the profile pipe fitting 10, further improving the positioning stability.

[0044] The flipping mechanism 8 includes a housing 81, a flipping motor 82, and a worm gear 831. The reduction ratio of the worm 83 and worm gear 831 (typically 1:50-1:100) ensures that the flipping angle error of the U-shaped frame 6 is within a certain range, guaranteeing that the weld position is aligned with the preset path when the back is facing upwards. It also has a self-locking function to ensure the stability of the profile position during welding. One end of a connecting rod 52 extends through and into the interior of the housing 81. The worm gear 831 is fixed to this section of the connecting rod 52. A mounting plate 811 is fixedly connected inside the housing 81. The flipping motor 82 is fixedly mounted on the mounting plate 811. The output end of the flipping motor 82 is fixedly connected to the worm 83, which meshes with the worm gear 831. When welding is required on different sides of the profile fitting 10 (e.g., the weld is located on the back), the control... The device starts the flipping mechanism 8, and the flipping motor 82 drives the worm 83 to rotate. The worm 83 meshes with the worm wheel 831 to drive the connecting rod 52 to rotate around the bearing seat 51, thereby causing the U-shaped frame 6 and the profile tube 10 fixed on it to flip synchronously (the flipping angle is preset by the controller). For example, when welding the top and side welds, the top of the U-shaped frame 6 is kept facing upwards, and when welding the back weld, it is flipped 180 degrees to ensure that the six-axis moving mechanism 2 drives the welding head 4 to always be in the best welding posture. After the positioning and angle adjustment are completed, the six-axis moving mechanism 2 drives the welding head 4 to move according to the preset path. The adjusting mechanism 41 (such as a rotary cylinder or fine-tuning slide rail) adjusts the tilt angle of the welding head 4 in real time. With the help of the positioning and flipping components, the welding of the profile tube 10 welds can be accurately achieved. Welding of the four sides of the profile welds can be achieved in the same welding process.

[0045] It should be noted that the top plate 63 experiences continuous frictional resistance when rotating relative to the positioning plate 62. This resistance is configured to support the top plate 63 at any angle within its opening range, and a certain force must be applied to allow it to continue rotating. Sufficient frictional resistance ensures that the top plate 63 remains stationary during welding, continuously applying stable auxiliary pressure to the profile. Furthermore, it can be fixed by hand adjustment. After the operator manually moves the top plate 63 to the target angle, they can release their hand to maintain the position without any additional locking steps. Especially in mass production, this can significantly reduce the time for positioning and adjustment, and improve the efficiency of preparation before welding.

[0046] In this embodiment, before placing or removing the profile fitting 10, the operator needs to manually turn the top plate 63. The applied external force must be greater than the preset frictional resistance, causing the top plate 63 to rotate around the limiting bolt 64. At this time, the top plate 63 moves away from the profile placement area (refer to...). Figure 5 This provides ample space for loading / unloading profiles; after the profile fittings 10 are placed between the positioning plates 62 and initially fixed by the clamping mechanism, the operator moves the top plate 63 again to rotate it toward the top of the profile. The top plate 63 can be stably suspended at the target angle and can maintain its position without additional locking parts.

[0047] The clamping plate 612 fixes the side of the profile with horizontal clamping force, while the top plate 63 fixes the top of the profile with vertical pressure. Together with the bottom connecting support plate 61 and the side positioning plate 62, it can effectively prevent the profile from shifting in three-dimensional space and provide a stable reference for the precise welding path of the six-axis moving mechanism 2.

[0048] Assuming the profile fitting 10 has a rectangular cross-section, four welds are required: top surface, front side, rear side, and back surface. The specific steps are as follows: The profile fitting 10 is fixed between the positioning plates 62 of the U-shaped frame 6 by the clamping mechanism. The U-shaped frame 6 maintains its top facing upward (initial posture). The six-axis moving mechanism 2 drives the welding head 4 to move to the top surface weld position according to the preset path. The adjusting mechanism 41 (such as a rotary cylinder) adjusts the tilt angle of the welding head 4 to the optimal welding angle, completing the top surface weld. Then, the side welds are welded without flipping the U-shaped frame 6 (see reference). Figure 3 The six-axis moving mechanism 2 drives the welding head 4 to move to the front side weld. The adjusting mechanism 41 rotates the welding head 4 to adapt to the welding posture of the face. In conjunction with the six-axis moving mechanism 2, the front side welding is completed. Similarly, after the side welding is completed, the U-shaped frame 6 still keeps the top facing upward. The multi-directional movement capability of the six-axis mechanism is used to cover the welds on both sides.

[0049] After the top and two sides are welded, the controller starts the flipping mechanism 8. The flipping motor 82 drives the worm gear 83 and worm wheel 831 to rotate the U-shaped frame 6 180 degrees around the connecting rod 52, so that the back of the profile fitting 10 faces upward. The six-axis moving mechanism 2 moves the welding head 4 to the back weld position (refer to the reference). Figure 4 The adjustment mechanism 41 adjusts the tilt angle of the welding head 4 according to the characteristics of the back weld, and works with the six-axis moving mechanism 2 to complete the back welding. After all four welds of the profile are completed, the U-shaped frame 6 is controlled to flip and reset, and then the top plate 63 is moved to remove the welded workpiece.

[0050] Traditional welding requires multiple clamping operations, and each clamping operation results in weld misalignment due to positioning deviations. This design, however, uses a single clamping operation combined with the flipping of the U-shaped frame 6 to ensure that the profile is always positioned with the same reference during the welding process, avoiding the positioning deviations caused by multiple clamping operations. The relative positional accuracy of the four-sided welds is significantly improved, making it particularly suitable for aligning right-angle welds on frame-type structures. A single clamping operation can continuously complete welding on all four sides, eliminating the repetitive steps of disassembly, repositioning, and clamping, and greatly shortening the welding cycle of a single workpiece. For welds with continuous transitions from the top surface to the side surface to the back surface, the six-axis moving mechanism 2 can work in conjunction with the flipping action of the U-shaped frame 6 to achieve continuous welding without breaks, directly transitioning from the end of the top surface weld to the starting point of the side surface weld, and then connecting the back surface weld by flipping, avoiding joint defects (such as incomplete fusion and porosity) in traditional segmented welding.

[0051] Example 2, refer to Figures 3-11 The vibration cooling assembly includes a cylinder 7 and a gas collecting cylinder 9. A mounting sleeve 74 is fixedly connected to one side of the cylinder 7. The cylinder 7 is fixed to the connecting support plate 61 or the top plate 63 through the mounting sleeve 74. It can rotate synchronously with the positioning and flipping assembly to ensure that no matter what angle the U-shaped frame 6 is flipped to, the jet pipe 91 can always be close to the weld area of ​​the profile fitting 10, avoiding misalignment between the cooling device and the weld due to the movement of the positioning assembly, and ensuring that the cooling gas is targeted to the high-temperature area. At the same time, it can transmit vibration force to the weld area from the upper and lower surfaces of the profile to achieve stress release.

[0052] A gas source interface 76 is installed at the lower end of the cylinder 7. The end of the gas guide hose 32 is inserted into the gas source interface 76 and communicates with the inner cavity of the cylinder 7 through the gas source interface 76 to realize the gas delivery path. The plug-in structure facilitates quick assembly and disassembly. At the same time, the tight fit of the interface ensures gas sealing, avoids insufficient pressure due to cooling gas leakage, and ensures stable jet intensity. A piston rod 71 is slidably connected to the inside of the cylinder 7 to ensure that the gas in the lower part of the cylinder 7 will not leak from the gap between the piston rod 71 and the cylinder 7, and ensures that all the gas can enter the gas collecting cylinder 9 through the venting groove 70 to avoid pressure loss. A spring connects the piston part of the piston rod 71 to the top wall of the inner cavity of the cylinder 7. 72. The top of the cylinder 7 is provided with a slot that matches the rod of the piston rod 71. A ball 711 is rotatably engaged at the end of the piston rod 71. The ball 711 is connected by a ball joint to ensure that even if the profile surface is not absolutely horizontal, full point contact can be achieved to effectively transmit impact force and prevent the piston rod 71 from being stuck. When the piston rod 71 moves upward, the ball 711 will contact the surface of the profile fitting 10. The lower end of the piston rod 71 is fixedly connected to a connecting pipe 75. A vent hole 751 is opened on the lower side wall of the connecting pipe 75. Several ventilation grooves 70 are spaced apart on the lower outer side wall of the cylinder 7. The ventilation grooves 70 are located below the piston rod 71.

[0053] Furthermore, the gas collecting cylinder 9 is fixed to the lower outer side of the cylinder body 7. One end of the gas collecting cylinder 9 is connected to the jet pipe 91. The end of the jet pipe 91 is set towards the weld of the profile fitting 10 to ensure that the cooling gas can be guided to the profile in time to complete the cooling and shaping of the profile after welding. The jet pipe 91 is a metal shaping hose that can be manually bent to guide the airflow. After bending, it can maintain its shape without external force fixing.

[0054] It should be noted that the connecting support plate 61 and the top plate 63 are provided with through holes 65 that match the rod portion of the piston rod 71, ensuring that the ball 711 can act on the profile surface. When the spring 72 is in its initial state, the lower end of the connecting pipe 75 is inserted into the air source interface 76. At this time, the air guide hole 751 is located inside the air source interface 76. At this time, the gas supplied by the air supply device 3 cannot enter the lower part of the cylinder 7, but will enter the connecting pipe 75 and push the piston rod 71 upward. The distance between the end face of the ball 711 and the profile fitting 10 is greater than the connecting pipe 75. The length of the tube 75 inserted inside the air source interface 76 provides space for the subsequent movement of the ball 711 on the profile surface, while also ensuring that the connecting tube 75 can be detached from the air source interface 76. The cross-sectional area of ​​the vent groove 70 is larger than that of the air source interface 76. The larger cross-section of the vent groove 70 ensures that the pressure relief speed is much greater than the air supply speed. The detachment of the connecting tube 75 achieves the physical cutoff of the air path. The combination of these two factors ensures that the pressure at the bottom of the piston rod 71 can drop sharply to near atmospheric pressure, creating the necessary conditions for the spring 72 to reset.

[0055] In this embodiment, when the spring 72 is in its naturally extended state, the piston rod 71 is supported by the downward force of the spring 72, and the connecting pipe 75 at its lower end is fully inserted into the air source interface 76. At this time, the air guide hole 751 on the side wall of the connecting pipe 75 is sealed by the inner wall of the air source interface 76, and the gas (such as inert protective gas) delivered by the air supply device 3 cannot enter the lower part of the cylinder 7. At the same time, there is a gap between the ball 711 at the top of the piston rod 71 and the profile fitting 10 to be welded (the gap length is greater than the length of the connecting pipe 75 inserted into the air source interface 76), which reserves space for the ball 711 to move onto the profile surface later.

[0056] The gas supplied by the gas supply device 3 forms a sealed cavity between the gas source interface 76 and the connecting pipe 75, preventing the gas from entering the lower part of the cylinder 7. Pressure gradually accumulates within the sealed cavity (to store energy for the subsequent pushing of the piston rod 71). As the gas supply device 3 continues to supply gas, the gas pressure within the sealed cavity gradually increases, eventually overcoming the elastic force of the spring 72 and pushing the piston rod 71 upwards. The upward movement of the piston rod 71 causes the connecting pipe 75 to move upwards synchronously, gradually exposing the air guide hole 751 within the sealing range of the gas source interface 76. When the piston rod 71 reaches the critical position (the connecting pipe 75 is completely disengaged), the pressure increases. (When the air source interface 76 is completely exposed, the air guide hole 751 is fully exposed. At this time, the ball 711 at the end of the piston rod 71 will collide with the surface of the profile, generating a high-frequency mechanical impact. The high-pressure gas will rush into the lower part of the cylinder 7 and enter the gas collecting cylinder 9 through the venting groove 70, and be ejected through the jet pipe 91. The pressure at the bottom of the piston rod 71 drops sharply, and the spring 72 quickly pushes the piston rod 71 to reset. After the piston rod 71 resets, the air guide hole 751 is resealed by the air source interface 76, and the gas starts to build up pressure again. The next cycle begins, and so on, forming a continuous high-frequency vibration.

[0057] The gas leaking from the vent 70 is not wasted, but is guided into the gas collection cylinder 9 and blown directionally towards the weld seam through the jet pipe 91. The jet pipe 91 is a metal shaped flexible hose that can be manually bent in advance to align with the weld seam position of the profile fitting 10, ensuring that the cooling gas acts directly on the high-temperature weld seam area, which can accelerate cooling, control the cooling rate of the weld seam area, reduce the overall temperature fluctuation of the profile, and avoid uneven shrinkage caused by excessive temperature difference (aluminum alloy has a high coefficient of thermal expansion, and excessive temperature difference will generate significant stress, leading to deformation such as bending and warping), and clean the weld seam, blowing away welding spatter and fumes. If inert gas is used, this gas can continue to protect the weld seam that has not been completely cooled and prevent oxidation. The gas flow rate is controlled by the gas supply device 3 and can be adjusted according to the weld seam thickness (such as thick plate weld seams which require a large flow rate) to meet the cooling needs of different welding scenarios. The installation sleeve 74 fixes the cylinder 7 on the connecting support plate 61 or the top plate 63 and moves synchronously with the positioning and flipping assembly to ensure that no matter what angle the U-shaped frame 6 is flipped to, the jet pipe 91 can always be close to the weld seam area.

[0058] The blowing and vibration effects of the oscillating cooling component cover both the profile during welding and the profile after welding, spanning both the auxiliary forming and post-weld cooling stages.

[0059] While welding head 4 is welding the profile pipe fitting 10, air blowing and vibration begin to work. At this time, the gas sprayed is mostly inert gas (such as argon), which directly covers the molten pool (high-temperature liquid metal) in the welding area, isolating oxygen and nitrogen in the air and preventing oxidation of the molten pool (avoiding the formation of brittle oxide films such as Al2O3, which affect the weld strength). At the same time, it provides a protective atmosphere for the molten pool and works with the arc of welding head 4 to stabilize the shape of the molten pool. High-frequency vibration is transmitted to the profile through ball 711, which generates a small mechanical disturbance to the molten pool, causing the bubbles in the molten pool (hydrogen, carbon monoxide, etc. that are easily generated during welding) to rise and escape, avoiding porosity defects. At the same time, it helps the liquid metal to fill the weld gap more evenly, reducing problems such as incomplete fusion and slag inclusions (especially for materials with poor fluidity such as aluminum alloys, vibration can enhance the fluidity of the molten pool).

[0060] After welding head 4 completes the entire welding process, the blowing and vibration continue for a period of time. At this time, the gas is mainly used for cooling (inert gas). Through forced convection, it quickly removes the residual heat from the weld and heat-affected zone (the weld temperature of aluminum alloy can reach 300-500℃ after welding), shortens the high-temperature dwell time, avoids grain coarsening (refining the grain can improve the weld strength), and prevents the weld from oxidizing again during the slow cooling process (forming a blackened or rough surface). After welding, the weld is in a solid high-temperature state (not completely cooled). The high-frequency vibration is transmitted to the weld area through the profile, causing the weld and surrounding materials to undergo slight plastic deformation, gradually releasing the residual stress generated by welding (aluminum alloy has a high coefficient of thermal expansion, and stress concentration is easily generated due to temperature difference after welding).

[0061] The core challenges in welding aluminum alloy profiles are high-temperature oxidation and high residual stress leading to cracking. The design of the vibration cooling component is specifically designed to address these issues. During welding, air blowing prevents oxidation and vibration optimizes the molten pool, reducing defects from the source. After welding, air blowing accelerates cooling and vibration evens the temperature and relieves stress, improving performance from the result. The combination of these two methods covers the entire welding cycle, ultimately achieving the processing goals of high-quality welds, low deformation, and high stability.

[0062] Example 3, referring to Figures 8-11 The limit counting assembly includes a pressure plate 712 fixedly connected to the outside of the piston rod 71 and a trigger counter 73 fixedly installed on the top of the piston rod 71. The trigger counter 73, the controller, and the air supply device 3 are electrically connected.

[0063] It should be noted that when the spring 72 is in its initial state, the pressure plate 712 is in contact with the trigger counter 73. When the end face of the ball 711 is in contact with the profile tube 10, there are gaps between the pressure plate 712 and the connecting support plate 61, and between the pressure plate 712 and the top plate 63. This ensures that the impact stroke of the piston rod 71 is complete and the impact force is fully released. The pressure plate 712 will only press against the trigger counter 73 when the piston rod 71 is fully reset, ensuring that each impact is counted only once and the data is accurate.

[0064] In this embodiment, the piston rod 71 moves upward, causing the pressure plate 712 to rise synchronously. The pressure plate 712 separates from the trigger counter 73. When the piston rod 71 resets, the pressure plate 712 will contact the trigger counter 73, and the trigger counter 73 will generate a pulse electrical signal, which is transmitted to the controller in real time. Every time the piston rod 71 completes one up-and-down cycle (i.e., one vibration), the pressure plate 712 will strike the trigger counter 73 once, sending a pulse signal to the controller. By counting the number of pulses, the controller can accurately know how many vibration impacts each weld point has received. When the number reaches the preset value, the controller can automatically close the solenoid valve of the air supply device 3 and stop the vibration processing at that point.

[0065] Based on the material of the profile fitting 10 (such as 6061 aluminum alloy, 7075 aluminum alloy), the weld thickness (such as 1mm thin plate, 5mm thick plate) and the welding process requirements, the operator presets the required number of vibration impacts for each weld point in the controller (for example, 30 times for thin plate welds and 50 times for thick plate welds). The controller continuously receives the pulse signal sent by the trigger counter 73 and accumulates the vibration number corresponding to each weld point in real time. When the accumulated number of pulses reaches the preset value, the controller immediately sends a command to the solenoid valve of the gas supply device 3 to shut off the gas supply. The piston rod 71 stops vibrating up and down due to the loss of gas pressure drive, and the vibration impact treatment of the weld point is automatically terminated.

[0066] Different thicknesses and materials of aluminum alloy welds have different vibration impact requirements (for example, thick plates need more vibrations to promote the escape of pores and stress release, while thin plates need fewer vibrations to avoid excessive impact and deformation). By controlling the preset number of vibrations, it can be ensured that the vibration impact intensity received by each weld point is uniform, avoiding insufficient or excessive vibration caused by manual operation, and improving the quality stability of batch products.

[0067] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0068] It should be noted that the specific model and specifications of the motor, etc., need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A welding device for processing aluminum alloy profiles, comprising a frame (1), a welding head (4), a controller, and profile fittings (10), wherein a six-axis moving mechanism (2) for controlling the movement of the welding head (4) is fixedly installed on the frame (1), a connecting frame is provided at the moving end of the six-axis moving mechanism (2), an adjusting mechanism (41) is installed on one side of the connecting frame, and the output end of the adjusting mechanism (41) is fixedly connected to one side of the welding head (4), characterized in that, The frame (1) is equipped with an air supply device (3) and a support platform (5). The air supply device (3) is connected to an air distribution plate (31) at its air delivery end. The air distribution plate (31) is connected to multiple air guide hoses (32). The device also includes: Positioning and flipping assembly: The positioning and flipping assembly is set on the frame (1) and the support platform (5); the positioning and flipping assembly includes a U-shaped frame (6), a flipping mechanism (8), and a bearing seat (51) installed on the support platform (5). A hollow area (60) is opened in the middle of the U-shaped frame (6). Connecting rods (52) are fixedly connected to both sides of the U-shaped frame (6). The connecting rods (52) are rotatably connected to the bearing seat (51). Connecting support plates (61) are fixedly connected to both sides of the U-shaped frame (6). The support plate (61) is provided with a positioning plate (62) and a clamping mechanism for fixing the profile pipe fitting (10). The positioning plate (62) is fixedly connected to the top wall of the support plate (61). The distance between the positioning plates (62) is matched with the profile pipe fitting (10). One of the positioning plates (62) is provided with a top plate (63). The top plate (63) is rotatably connected to the top of the positioning plate (62) through a limiting bolt (64). The limiting bolt (64) is rotatably engaged with the positioning plate (62). Oscillating Cooling Assembly: The oscillating cooling assembly is mounted on the positioning and flipping assembly; the oscillating cooling assembly includes a cylinder (7) and an air collecting cylinder (9). An installation sleeve (74) is fixedly connected to one side of the cylinder (7). The cylinder (7) is fixed to the connecting support plate (61) or the top plate (63) through the installation sleeve (74). An air source interface (76) is installed at the lower end of the cylinder (7). The end of the air guiding hose (32) is inserted into the air source interface (76) and passes through the air source interface (76). The piston rod (71) is connected to the inner cavity of the cylinder (7). The piston part of the piston rod (71) is elastically connected to the top wall of the inner cavity of the cylinder (7) by a spring (72). The top of the cylinder (7) is provided with a slot that matches the rod part of the piston rod (71). A ball (711) is rotatably engaged in the end of the rod of the piston rod (71). A connecting pipe (75) is fixedly connected to the lower end of the piston rod (71). The lower end of the connecting pipe (75) is connected to the connecting pipe (75). A vent hole (751) is provided on the side wall of the cylinder (7), and several ventilation grooves (70) are provided at intervals on the lower outer side wall of the cylinder (7). The ventilation grooves (70) are located below the piston rod (71). Through holes (65) matching the rod part of the piston rod (71) are provided on the connecting support plate (61) and the top plate (63). When the spring (72) is in its initial state, the lower end of the connecting pipe (75) is inserted into the air source interface (76). At this time, the vent hole (751) is located in the air source interface (76). The distance between the end face of the sphere (711) and the profile fitting (10) is greater than the length of the connecting pipe (75) inserted into the air source interface (76), and the cross-sectional area of ​​the ventilation groove (70) is greater than the cross-sectional area of ​​the air source interface (76); the air collecting cylinder (9) is fixed on the lower outer side of the cylinder (7), and one end of the air collecting cylinder (9) is connected to the jet pipe (91). The end of the jet pipe (91) is set towards the weld of the profile fitting (10), and the jet pipe (91) is a metal shaped flexible hose; Limit counting component: The limit counting component is disposed on the oscillation cooling component; When the spring (72) is in its naturally extended state, the piston rod (71) is supported by the downward force of the spring (72), and the connecting pipe (75) at its lower end is completely inserted into the air source interface (76). At this time, the air guide hole (751) on the side wall of the connecting pipe (75) is sealed by the inner wall of the air source interface (76); the gas supplied by the gas supply device (3) forms a sealed cavity between the air source interface (76) and the connecting pipe (75); when the gas supply device (3) continues to supply gas, the gas pressure in the sealed cavity gradually increases, eventually overcoming the elastic force of the spring (72) and pushing the piston rod (71) upward. The piston rod (71) moves upward and drives the connecting pipe (75) to move upward. 75) As the piston rod moves upward synchronously, the air guide hole (751) gradually exposes the sealing range of the air source interface (76). When the piston rod (71) moves upward to the critical position, the ball (711) at the end of the piston rod (71) will collide with the surface of the profile, generating a high-frequency mechanical impact. The high-pressure gas will rush into the lower part of the cylinder (7) and enter the gas collection cylinder (9) through the ventilation groove (70), and be ejected through the jet pipe (91). The pressure at the bottom of the piston rod (71) drops sharply, and the spring (72) quickly pushes the piston rod (71) to reset. After the piston rod (71) is reset, the air guide hole (751) is sealed again by the air source interface (76).

2. The welding device for processing aluminum alloy profiles according to claim 1, characterized in that, The clamping mechanism includes a clamping drive unit (613) and a limiting slide groove (611) opened on the connecting support plate (61). Two clamping plates (612) are symmetrically arranged inside the limiting slide groove (611). The clamping plates (612) are slidably connected to the limiting slide groove (611). The clamping drive unit (613) is connected to the two clamping plates (612) and can drive the two clamping plates (612) to move towards or away from each other along the limiting slide groove (611) to achieve clamping or loosening of the profile pipe fitting (10).

3. The welding device for processing aluminum alloy profiles according to claim 1, characterized in that, The flipping mechanism (8) includes a housing (81), a flipping motor (82), and a worm gear (831). One end of the connecting rod (52) extends through and into the interior of the housing (81). The worm gear (831) is fixed on the connecting rod (52). An installation plate (811) is fixedly connected inside the housing (81). The flipping motor (82) is fixedly installed on the installation plate (811). A worm (83) is fixedly connected to the output end of the flipping motor (82). The worm (83) and the worm gear (831) are meshed together.

4. The welding device for processing aluminum alloy profiles according to claim 1, characterized in that, The top plate (63) is subjected to continuous frictional resistance when rotating relative to the positioning plate (62). The resistance is configured to support the top plate (63) at any angle within its opening range and requires a certain force to continue rotating.

5. The welding device for processing aluminum alloy profiles according to claim 1, characterized in that, The limit counting assembly includes a pressure plate (712) fixedly connected to the outside of the piston rod (71) and a trigger counter (73) fixedly installed on the top of the piston rod (71). The trigger counter (73), the controller and the air supply device (3) are electrically connected.

6. The welding device for processing aluminum alloy profiles according to claim 5, characterized in that, When the spring (72) is in its initial state, the pressure plate (712) is in contact with the trigger counter (73). When the end face of the ball (711) is in contact with the profile tube (10), there are gaps between the pressure plate (712) and the connecting support plate (61), and between the pressure plate (712) and the top plate (63).

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