Automatic welding device and method for aluminum alloy round pipe

Abstract

The invention discloses an aluminum alloy round pipe automatic welding device and method, and relates to the technical field of round pipe welding, the aluminum alloy round pipe automatic welding device comprises a rack, a driving positioner is installed at one end of the rack, a driven positioner is slidably installed at the other end of the rack through a rail, and the position of the driven positioner is fixed through a clamping piece; flanges are mounted on the driving positioner and the driven positioner, the aluminum alloy circular pipe is supported between the driving positioner and the driven positioner through a slidable supporting part, and a welding mechanism for welding the aluminum alloy circular pipe and the flanges is slidably mounted on one side of the aluminum alloy circular pipe through a rail of the rack; the driven positioner can conduct self-adaptive adjustment according to the length of the aluminum alloy circular pipe, meanwhile, the clamping piece is arranged on the driven positioner and used for resisting welding stress and deformation generated in the welding process of the aluminum alloy circular pipe and the flange, the welding stress is slowly released in the cooling process, the size precision after welding is improved, and the welding quality is improved. The purpose that the product does not need to be reprocessed after being welded is achieved.

Description

Technical Field

[0001] This invention relates to the field of circular tube welding technology, specifically to an automatic welding device and method for aluminum alloy circular tubes. Background Technology

[0002] Aluminum alloy is one of the most widely used metal materials in industry. It has the characteristics of being lightweight, corrosion resistant, high strength, and having good electrical and thermal conductivity. In the power industry, it is often made into round pipes and used as the housing of power equipment. Aluminum alloy pipes usually require welding during use. A flange is welded to each end of the pipe. When in use, multiple pipe sections are joined together by connecting the flanges to form the required pipe length.

[0003] However, the welding process of aluminum alloys is more complex than that of traditional steel. Due to their high thermal conductivity, which makes them prone to hot cracking, large welding deformation, and high porosity sensitivity, they place higher demands on personnel and equipment.

[0004] Existing technologies typically employ a semi-automatic approach, where circular pipe fittings are fixed on a rotary positioner, and the circumferential weld is performed manually as the machine rotates. This welding method requires highly skilled personnel and involves long working hours, resulting in a low degree of automation. Furthermore, secondary processing of the flange end face and fixing holes is usually required after welding, making the production process complex.

[0005] Therefore, there is an urgent need for an automatic welding device and method for aluminum alloy round tubes to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic welding device and method for aluminum alloy round tubes, in order to solve the technical problems of the prior art, which involves manual welding of circumferential welds by rotating a machine. This welding method requires high skill levels and long working hours, has a low degree of automation, and usually requires secondary processing of the flange end face and fixing holes after welding, resulting in a complex production process.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic welding device for aluminum alloy round tubes, comprising a frame, an active positioner mounted at one end of the frame, and a driven positioner slidably mounted at the other end of the frame via a rail. The driven positioner is fixed in position by clamping components. Flanges are mounted on both the active and driven positioners. The aluminum alloy round tube is supported between the active and driven positioners by a slidable support. A welding mechanism for welding the aluminum alloy round tube and the flange is slidably mounted on one side of the aluminum alloy round tube via a rail on the frame.

[0008] Through the above technical solution, the driven positioner can adaptively adjust according to the length of the aluminum alloy round tube. At the same time, the driven positioner is equipped with clamping components to resist the welding stress and deformation generated during the welding process of the aluminum alloy round tube and the flange. The welding stress is slowly released during the cooling process, which improves the dimensional accuracy after welding and achieves the goal of eliminating the need for further processing after the product is welded.

[0009] Preferably, a slide is provided on the frame along the sliding direction of the driven positioner; A clamping plate is provided on the slide, and a sliding limit seat is covered on the outside of the clamping plate. A wedge-shaped clamping block 1 is provided at the contact position between the limit seat and the clamping plate. The wedge-shaped clamping block 1 moves inside the limit seat in a direction perpendicular to the clamping plate. A wedge-shaped clamping block 2 is provided on one side of the wedge-shaped clamping block 1, and the wedge-shaped surfaces of the two clamping blocks are in contact with each other. The wedge-shaped clamping block 2 is driven to move by a fastening bolt installed on the limit seat.

[0010] Through the above technical solution, after determining the position of the driven positioner based on the aluminum alloy round tube, the clamping plate can be clamped by using the fastening bolts to drive the wedge clamping block one and the wedge clamping block two, thereby fixing the position of the driven positioner and avoiding the reduction of welding accuracy due to the welding stress and deformation of the aluminum alloy round tube during the welding process, so as to achieve the purpose of not needing further processing after the product is welded.

[0011] Preferably, the driven positioner includes a frame, on which a rotary disk for fixing and rotating the flange is mounted. The driven positioner moves on the guide rail of the frame via a slider at the bottom. A reducer is installed inside the frame, and a gear is mounted on the output shaft of the reducer, meshing with a rack on the frame. A handwheel is provided on the reducer.

[0012] The above technical solution enables manual adjustment of the position of the driven positioner. The position of the driven positioner can be adjusted according to the length of the aluminum alloy round tube, thereby improving the adaptability of the entire welding device to welding aluminum alloy round tubes.

[0013] Preferably, the active positioner includes a frame two, on which a rotary disk two for fixing and rotating the flange is mounted; Both rotating disk one and rotating disk two are equipped with flange locating pins for positioning the flange installation position and fasteners for fixing the flange installation position.

[0014] The above technical solution allows for the positioning of the flange by means of flange locating pins and the fixing of the flange by means of fasteners, thus ensuring the stability of the welding between the aluminum alloy round tube and the flange.

[0015] Preferably, the driven positioner has a pin fixing plate at the bottom, with an upward-facing positioning pin on the pin fixing plate. A positioning pin plate is provided on one edge of the rotating disk, and a telescopic cylinder is provided at the bottom of the pin fixing plate. The telescopic cylinder controls the positioning pin to insert into or disengage from the positioning pin plate.

[0016] The above technical solution is used to position the starting angle of the rotation of the rotating disk, so that the rotating disks of the active positioner and the driven positioner, as well as the flange positioning pins on the rotating disks, are kept on the same axis. This allows the welded aluminum alloy round tube to meet higher precision requirements, improves the dimensional accuracy after welding, and achieves the goal of eliminating the need for further processing after welding.

[0017] Preferably, the support unit slides on the track of the frame via a fixed base at the bottom. A lifting platform is provided above the fixed base, and several support components for supporting the aluminum alloy round tube are provided on the lifting platform. The support components are arranged in a manner that fits the arc-shaped bottom of the aluminum alloy round tube. A screw lifting component is provided between the fixed base and the lifting platform, and a second handwheel is installed on the screw lifting component. A dovetail slide is provided at one end of the lifting platform. By adjusting the position of the dovetail slide, the position of the aluminum alloy round tube placed on the support component can be precisely adjusted, thereby facilitating the positioning treatment of the product before welding.

[0018] The above technical solution allows for height adjustment of the aluminum alloy tube via a lifting platform and lateral adjustment via a dovetail slide before welding, thereby adjusting and fixing the position of the aluminum alloy tube and ensuring welding accuracy between the aluminum alloy tube and the flange.

[0019] Preferably, the welding mechanism includes a welding torch slide, which is slidably connected to the frame. The welding torch slide moves on the frame by meshing with the track gear on the bottom of the welding torch slide. The slide gear is driven by a servo motor to adjust the position of the welding mechanism. A welding torch column is provided on the welding torch slide, and a welding torch crossbeam is provided on the welding torch column. A wire spool and a wire feeder are provided on the welding torch crossbeam. The wire feeder conveys the welding wire inside the wire spool to the welding torch oscillation assembly for welding.

[0020] Preferably, the welding torch oscillation assembly is installed at one end of the welding torch crossbeam, including linear module one and linear module two. Linear module two is installed on the output end of linear module one, and the welding torch is installed on the output end of linear module two. The horizontal and vertical movement is achieved through linear module one and linear module two. The welding torch is also equipped with an adjustable bracket for adjusting the position and angle of the welding wire feed.

[0021] According to the above technical solution, the position of the welding torch can be adjusted so that the welding torch can be used for different aluminum alloy round tubes, thereby improving the overall applicability of the welding device.

[0022] Preferably, a connecting rod is provided on one side of the welding torch, and a cam is provided at the bottom of the connecting rod to fit the aluminum alloy tube. The cam is designed to fit the aluminum alloy tube to ensure that the distance between the welding torch and the aluminum alloy tube remains consistent during the welding process. An elastic element is provided at the connection between the linear module one and the welding torch beam. A rotary cylinder is provided on the linear module two. The rotary cylinder is used to adjust the position of the cam. Since the welding mechanism may weld the flange on the left side of the aluminum alloy tube or the flange on the right side of the aluminum alloy tube, the position of the cam needs to be adjusted in order not to affect the welding. The top of the connecting rod is connected to the output end of the rotary cylinder.

[0023] With the above technical solution, during welding, the cam contacts the outer circle of the aluminum alloy tube and causes the elastic element to generate a certain amount of compression, so that the distance between the welding torch and the weld seam remains consistent. This avoids the deviation in the distance between the welding torch and the weld seam during rotation due to the roundness deviation of the aluminum alloy tube, which would affect the weld quality. The cam is controlled by a rotary cylinder, and its position can be adjusted to the left or right side of the welding torch to meet the requirements of welding flanges on the left or right side of the aluminum alloy tube.

[0024] An automatic welding method for aluminum alloy round tubes is achieved using an automatic welding device for aluminum alloy round tubes. Step 1: Use the positioning pin and positioning pin plate to position the initial rotation position of the rotating disk one; Step 2: Position and install the flanges to be welded on rotating disc one and rotating disc two using flange locating pins and fasteners; Step 3: Use the support part to support the aluminum alloy round tube, and use the support part to adjust the position of the aluminum alloy round tube; Step 4: Adjust the position of the driven positioner on the frame using handwheel 1 according to the length of the aluminum alloy round tube; Step 5: Tighten the fastening bolts and use the wedge-shaped clamping blocks to clamp the pair of clamping plates to complete the fixation of the driven positioner's position; Step Six: Use the control cabinet to adjust the position of the welding mechanism and control the servo motor on the welding mechanism to move the welding torch to the welding position to spot weld the flange and aluminum alloy round pipe; Step 7: After spot welding is completed, the support is lowered and the aluminum alloy tube is no longer supported. The weld is automatically welded by the rotation of the active positioner and the passive positioner and the welding mechanism.

[0025] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention is equipped with a driven positioner, which controls the rotation of rotating disk one and rotating disk two through a servo motor, thereby driving the aluminum alloy round tube fixed on rotating disk one and rotating disk two. At the same time, the welding mechanism is installed on the frame, and the position and swing of the welding gun are controlled by the program, thereby realizing the automatic welding of the butt weld between the aluminum alloy round tube and the flange, reducing the time and cost of manual welding.

[0026] 2. Equipped with a precision-machined frame and a driven positioner, the rotating disks of the active and driven positioners, along with the rotating disk one, achieve high-precision coaxiality and parallelism, enabling the welded aluminum alloy round tube products to meet high precision requirements. Simultaneously, the driven positioner is equipped with clamping components to resist welding stress and deformation generated during the welding process. Welding stress is slowly released during cooling, improving the dimensional accuracy after welding and achieving the goal of eliminating the need for further processing after welding.

[0027] 3. In this invention, the cam and elastic element are designed so that during welding, the cam contacts the outer circle of the aluminum alloy tube and the elastic element generates a certain amount of compression, keeping the distance between the welding torch and the weld seam consistent. This avoids deviations in the distance between the welding torch and the weld seam due to the roundness deviation of the aluminum alloy tube, which would affect the weld quality. The cam is controlled by a rotary cylinder, and its position can be adjusted to the left or right side of the welding torch to meet the requirements of welding flanges on the left or right side of the aluminum alloy tube. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an automatic welding device for aluminum alloy round tubes according to the present invention; Figure 2 This is a schematic diagram showing the installation position of the driven positioner of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram of region A in the middle; Figure 4 This is a cross-sectional view of the clamping component of the present invention; Figure 5 This is a schematic diagram of the structure of the driven positioner of the present invention; Figure 6 This is a schematic diagram of the active positioner of the present invention; Figure 7 This is a schematic diagram of the positioning pin and positioning pin plate of the present invention; Figure 8 This is a schematic diagram of the structure of the support part of the present invention; Figure 9 This is a schematic diagram of the welding mechanism of the present invention; Figure 10 This is a schematic diagram showing the installation relationship of the linear module one, the linear module two, and the welding torch of the present invention.

[0029] Numbering on the map: 100. Rack; 200. Active positioner; 201. Frame two; 202. Rotary disk two; 203. Flange locating pin; 204. Fasteners; 300. Driven positioner; 301. Frame 1; 302. Rotary disk 1; 303. Guide rail; 304. Slider; 305. Reducer; 306. Handwheel 1; 3071. Positioning pin; 3072. Positioning pin plate; 3073. Pin fixing plate; 3074. Telescopic cylinder; 400, Aluminum alloy round tube; 500. Welding mechanism; 501. Welding torch slide; 502. Welding torch column; 503. Welding torch crossbeam; 504. Welding wire spool; 505. Wire feeder; 506. Welding torch oscillation assembly; 5061. Linear module one; 5062. Linear module two; 5063. Welding torch; 5064. Adjustable bracket; 5065. Connecting rod; 5066. Cam; 5067. Elastic element; 5068. Rotary cylinder; 5069. Cooling water tank; 5060. Control cabinet; 601. Clamping plate; 602. Limiting seat; 603. Wedge clamping block one; 604. Wedge clamping block two; 605. Fastening bolt; 606. Driving component; 700, slide block; 801. Fixed base; 802. Lifting platform; 803. Support component; 804. Dovetail groove slide; 805. Screw lifting component; 806. Handwheel II. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: As Figures 1-2As shown, an automatic welding device for aluminum alloy round tubes includes a frame 100. An active positioner 200 is installed at one end of the frame 100, and a driven positioner 300 is slidably installed at the other end of the frame 100 via a rail. The driven positioner 300 is fixed in position by clamping components. Flanges are installed on both the active positioner 200 and the driven positioner 300. The aluminum alloy round tube 400 is supported by a slidable support between the active positioner 200 and the driven positioner 300. A welding mechanism 500 for welding the aluminum alloy round tube 400 and the flange is slidably installed on one side of the aluminum alloy round tube 400 via the rail of the frame 100. Two sets of arc light blocking doors are also provided on the frame 100 for observing the welding process and blocking arc light pollution during welding. The arc light blocking doors are connected by guide rails and can be moved to the welding position as needed. Two sets of foot platforms are provided next to the frame 100 for easy access for personnel to get on and off the frame 100.

[0032] Specifically, such as Figures 3-4 As shown, a slide block 700 is provided on the frame 100 along the sliding direction of the driven positioner 300; A clamping plate 601 is provided on the slide 700. A slidable limiting seat 602 covers the outside of the clamping plate 601. A wedge-shaped clamping block 603 is provided at the contact position between the limiting seat 602 and the clamping plate 601. The wedge-shaped clamping block 603 moves inside the limiting seat 602 in a direction perpendicular to the clamping plate 601. A wedge-shaped clamping block 604 is provided on one side of the wedge-shaped clamping block 603, and the wedge-shaped surfaces of the two clamping blocks are in contact with each other. By pushing the wedge-shaped clamping block 603 with the wedge-shaped clamping block 604, the clamping plate 601 can be clamped by the wedge-shaped clamping block 603, thus fixing the position of the driven positioner 300. The wedge-shaped clamping block 604 is driven to move by the fastening bolt 605 installed on the limiting seat 602.

[0033] Specifically, in this embodiment, the fastening bolt 605 passes through the second wedge clamping block 604 and is installed on the limiting seat 602. Furthermore, a driving member 606 is provided between the nut of the fastening bolt 605 and the second wedge clamping block 604. By tightening the fastening bolt 605, the fastening bolt 605 moves downward, thereby driving the driving member 606 to apply force to the second wedge clamping block 604, so that the second wedge clamping block 604 drives the first wedge clamping block 603 to clamp the clamping plate 601.

[0034] In another embodiment, the fastening bolt 605 does not need to penetrate the wedge-shaped clamping block 604. Instead, a nut is provided above the wedge-shaped clamping block 604. By tightening the fastening bolt 605, the wedge-shaped clamping block 604 is moved by one end of the continuously elongating fastening bolt 605.

[0035] Specifically, such as Figure 5As shown, the driven positioner 300 includes a frame 301, on which a rotary disk 302 for fixing and rotating the flange is mounted. The driven positioner 300 moves on the guide rail 303 of the frame 100 via a slider 304 at the bottom. A reducer 305 is installed inside the frame 301. A gear is mounted on the output shaft of the reducer 305, which meshes with the rack on the frame 100. A handwheel 306 is provided on the reducer 305. Specifically, the reducer 305 can be driven to rotate by rotating the handwheel 306, and the gear on the reducer 305 moves on the rack of the frame 100, thereby realizing the movement of the position of the driven positioner 300.

[0036] In this embodiment, as Figure 6 As shown, the active positioner 200 includes a frame 201, on which a rotary disk 202 for fixing and rotating the flange is mounted. Both the first rotating disk 302 and the second rotating disk 202 are equipped with flange positioning pins 203 for positioning the flange installation position and fasteners 204 for fixing the flange installation position. Specifically, the fasteners 204 can slide on the first rotating disk 302 and the second rotating disk 202 to adjust their position, so that they can be used to fix flanges of different sizes.

[0037] Specifically, such as Figure 7 As shown, the driven positioner 300 has a pin fixing plate 3073 at its bottom, and a positioning pin 3071 facing upwards is provided on the pin fixing plate 3073. The rotating disk 302 has a positioning pin plate 3072 on its edge. The bottom of the pin fixing plate 3073 is provided with a telescopic cylinder 3074, which controls the positioning pin 3071 to insert into or disengage from the positioning pin plate 3072.

[0038] In this embodiment, the positioning pin 3071, positioning pin plate 3072, pin fixing plate 3073, and telescopic cylinder 3074 move with the driven positioner 300. The positioning pin plate 3072 has a hole at the end away from the center point of the rotating disk 302 to facilitate the insertion of the positioning pin 3071. The shape of the hole can be set according to actual needs. In this embodiment, a hole with a triangular cross-section is used because the opening of the triangular hole is larger, making it easier to insert the positioning pin 3071.

[0039] like Figure 8As shown, in this embodiment, the support slides on the track of the frame 100 via the bottom fixing seat 801. A lifting platform 802 is provided above the fixing seat 801. Specifically, a limit post is provided between the fixing seat 801 and the lifting platform 802 to ensure that the lifting platform 802 always remains vertical. Several support members 803 are provided on the lifting platform 802 to support the aluminum alloy tube 400. The support members 803 are arranged to fit the arc-shaped bottom of the aluminum alloy tube 400. Specifically, the support members 803 can be roller-shaped, cylindrical, or spindle-shaped, etc., and can be set according to actual needs. The fixing seat 801... A screw lifting component 805 is provided between the lifting platform 802 and the lifting component 1. A second handwheel 806 is installed on the screw lifting component 805. By rotating the second handwheel 806, the screw lifting component 805 can be driven to rotate, thereby realizing the lifting and lowering adjustment of the lifting platform 802. As for how the screw lifting component 805 achieves the lifting and lowering of the lifting platform 802 by rotation, it is a conventional technical means and will not be described in detail here. A dovetail slide 804 is provided at one end of the lifting platform 802. By adjusting the position of the dovetail slide 804, the position of the aluminum alloy round tube 400 placed on the support component 803 can be precisely adjusted, thereby facilitating the positioning treatment of the product before welding.

[0040] With at least two support parts, the position of the aluminum alloy round tube 400 placed on the support 803 can be precisely adjusted, allowing Fang Baini to position the product before welding.

[0041] Specifically, such as Figure 9 As shown, the welding mechanism 500 includes a welding torch slide 501, which is slidably connected to the frame 100. The welding torch slide 501 moves within the frame 100 by meshing with the track gear of the frame 100 via a slide gear at the bottom of the welding torch slide 501. The slide gear is driven by a servo motor to adjust the position of the welding mechanism 500. A welding torch column 502 is provided on the welding torch slide 501, and a welding torch crossbeam 503 is provided on the welding torch column 502. In this embodiment, the position of the welding torch crossbeam 503 can be adjusted by a drive structure, specifically, a chain drive structure or a lead screw drive structure. A welding wire spool 504 and a wire feeder 505 are provided on the welding torch crossbeam 503. The welding wire inside the welding wire spool 504 is fed to the welding torch oscillation assembly 506 for welding via the wire feeder 505.

[0042] In this embodiment, the welding torch slide 501 is also equipped with a cooling water tank 5069 and a control cabinet 5060. The cooling water tank 5069 is used to dissipate heat generated during the welding process, and the control cabinet 5060 is used to automatically control the entire welding device, such as adjusting and controlling the position of the welding mechanism 500, to ensure the stable operation of the entire welding device.

[0043] like Figure 10 As shown, in this embodiment, the welding torch oscillation assembly 506 is installed at one end of the welding torch crossbeam 503, including a linear module 1 5061 and a linear module 2 5062. The linear module 2 5062 is installed on the output end of the linear module 1 5061, and the welding torch 5063 is installed on the output end of the linear module 2 5062. The linear module 1 5061 and the linear module 2 5062 realize horizontal and vertical movement. Specifically, the linear module 1 5061 drives the linear module 2 5062 to move vertically, and the linear module 2 5062 drives the welding torch 5063 to move horizontally. An adjustable bracket 5064 is also installed on the welding torch 5063 for adjusting the position and angle of the welding wire feed. In this embodiment, the welding wire on the adjustable bracket 5064 is fed by the wire feeder 505, the wire feed angle is adjusted by the vertical waist-shaped hole on the adjustable bracket 5064, and the wire feed position is adjusted by the horizontal waist-shaped hole on the adjustable bracket 5064.

[0044] A connecting rod 5065 is provided on one side of the welding torch 5063. A cam 5066 is provided at the bottom of the connecting rod 5065 to fit against the aluminum alloy tube 400. The design of the cam 5066 is to fit against the aluminum alloy tube 400 to ensure that the distance between the welding torch 5063 and the aluminum alloy tube 400 remains consistent during the welding process. An elastic element 5067 is provided at the connection between the linear module 1 5061 and the welding torch beam 503. A rotary cylinder 5068 is provided on the linear module 2 5062. In this embodiment, the rotary cylinder 5068 is used to adjust the position of the cam 5066. Since the welding mechanism 500 may weld the flange on the left side of the aluminum alloy tube 400 or the flange on the right side of the aluminum alloy tube 400, the position of the cam 5066 needs to be adjusted in order not to affect the welding. The top of the connecting rod 5065 is connected to the output end of the rotary cylinder 5068.

[0045] Through the above technical solution, during welding, the cam 5066 contacts the outer circle of the aluminum alloy tube 400, and the elastic element 5067 generates a certain amount of compression, so that the distance between the welding torch 5063 and the weld seam remains consistent. This avoids deviations in the distance between the welding torch 5063 and the weld seam due to the roundness deviation of the aluminum alloy tube 400, which would affect the weld quality. The cam 5066 is controlled by the rotary cylinder 5068, and its position can be adjusted to the left or right of the welding torch 5063 to meet the requirements of welding flanges on the left or right side of the aluminum alloy tube 400.

[0046] Example 2: An automatic welding method for aluminum alloy round tubes, implemented using an automatic welding device for aluminum alloy round tubes: Step 1: Use the positioning pin 3071 and positioning pin plate 3072 to position the initial rotation position of the rotating disk 302. Step 2: Position and install the flanges to be welded on rotating disk 1 302 and rotating disk 2 202 using flange positioning pins 203 and fasteners 204. Step 3: Use the support part to support the aluminum alloy round tube 400, and use the support part to adjust the position of the aluminum alloy round tube 400. Step 4: Based on the length of the aluminum alloy round tube 400, use handwheel 306 to adjust the position of the driven positioner 300 on the frame 100; Step 5: By tightening the fastening bolts 605, the clamping plate 601 is clamped by the wedge clamping block 603 to complete the fixation of the driven positioner 300. Step Six: Use the control cabinet 5060 to adjust the position of the welding mechanism 500, and control the servo motor on the welding mechanism 500 to drive the welding torch 5063 to move to the welding position to perform spot welding on the flange and the aluminum alloy round tube 400. In this embodiment, the specific welding position of the welding torch 5063 can be determined by using a sensor to detect the position between the welding torch 5063 and the aluminum alloy round tube 400. For example, a pressure sensor can be installed on the cam 5066, so that when the pressure sensor detects that the cam 5066 is under pressure, it indicates that the welding torch 5063 has reached the welding position. Step 7: After spot welding is completed, the support is lowered and the aluminum alloy round tube 400 is no longer supported. The weld is automatically welded by the rotation of the active positioner 200 and the driven positioner 300 and the welding mechanism 500.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic welding device for aluminum alloy round tubes, comprising a frame (100), wherein an active positioner (200) is mounted at one end of the frame (100), characterized in that: A driven positioner (300) is slidably mounted on the other end of the frame (100) via a rail. The driven positioner (300) is fixed in position by a clamping device. Both the active positioner (200) and the driven positioner (300) are equipped with flanges. The active positioner (200) and the driven positioner (300) are supported by a sliding support part. A welding mechanism (500) for welding the aluminum alloy round tube (400) and the flange is slidably mounted on one side of the aluminum alloy round tube (400) via the rail of the frame (100).

2. The automatic welding device for aluminum alloy round tubes according to claim 1, characterized in that: A slide (700) is provided on the frame (100) along the sliding direction of the driven positioner (300); A clamping plate (601) is provided on the slide (700). A sliding limit seat (602) is covered on the outside of the clamping plate (601). A wedge-shaped clamping block one (603) is provided at the contact position between the limit seat (602) and the clamping plate (601). The wedge-shaped clamping block one (603) moves in the direction perpendicular to the clamping plate (601) inside the limit seat (602). A wedge-shaped clamping block two (604) is provided on one side of the wedge-shaped clamping block one (603), and the wedge-shaped surfaces of the two clamping blocks are in contact with each other. The wedge-shaped clamping block two (604) is driven to move by a fastening bolt (605) installed on the limit seat (602).

3. The automatic welding device for aluminum alloy round tubes according to claim 1, characterized in that: The driven positioner (300) includes a frame (301), on which a rotary disk (302) for fixing and rotating the flange is mounted. The driven positioner (300) moves on the guide rail (303) of the frame (100) via a slider (304) at the bottom. A reducer (305) is installed inside the frame (301). A gear is mounted on the output shaft of the reducer (305) and meshes with a rack on the frame (100). A handwheel (306) is provided on the reducer (305).

4. The automatic welding device for aluminum alloy round tubes according to claim 3, characterized in that: The active positioner (200) includes a frame two (201) on which a rotary disk two (202) for fixing and rotating the flange is mounted. Both the first rotating disk (302) and the second rotating disk (202) are provided with flange positioning pins (203) for positioning the flange installation position and fasteners (204) for fixing the flange installation position.

5. The automatic welding device for aluminum alloy round tubes according to claim 4, characterized in that: The driven positioner (300) has a pin fixing plate (3073) at the bottom, and a positioning pin (3071) facing upward is provided on the pin fixing plate (3073). The rotating disk (302) has a positioning pin plate (3072) at its edge. The pin fixing plate (3073) has a telescopic cylinder (3074) at its bottom. The telescopic cylinder (3074) controls the positioning pin (3071) to insert into or disengage from the positioning pin plate (3072).

6. The automatic welding device for aluminum alloy round tubes according to claim 1, characterized in that: The support unit slides on the track of the frame (100) via the fixed seat (801) at the bottom. A lifting platform (802) is provided above the fixed seat (801). Several support members (803) for supporting the aluminum alloy round tube (400) are provided on the lifting platform (802). The several support members (803) are arranged in a way that fits the arc-shaped bottom of the aluminum alloy round tube (400). A screw lifting member (805) is provided between the fixed seat (801) and the lifting platform (802). A second handwheel (806) is installed on the screw lifting member (805). A dovetail groove slide (804) is provided at one end of the lifting platform (802).

7. The automatic welding device for aluminum alloy round tubes according to claim 1, characterized in that: The welding mechanism (500) includes a welding torch slide (501), which is slidably connected to the frame (100). A welding torch column (502) is provided on the welding torch slide (501), and a welding torch crossbeam (503) is provided on the welding torch column (502). A welding wire spool (504) and a wire feeder (505) are provided on the welding torch crossbeam (503). The welding wire inside the welding wire spool (504) is fed to the welding torch oscillation assembly (506) for welding through the wire feeder (505).

8. The automatic welding device for aluminum alloy round tubes according to claim 7, characterized in that: The welding torch oscillation assembly (506) is installed at one end of the welding torch crossbeam (503), including linear module one (5061) and linear module two (5062). Linear module two (5062) is installed on the output end of linear module one (5061), and welding torch (5063) is installed on the output end of linear module two (5062). The horizontal and vertical movement is achieved through linear module one (5061) and linear module two (5062). An adjustable bracket (5064) is also installed on the welding torch (5063) for adjusting the position and angle of the welding wire feed.

9. The automatic welding device for aluminum alloy round tubes according to claim 8, characterized in that: A connecting rod (5065) is provided on one side of the welding torch (5063). A cam (5066) that fits against the aluminum alloy round tube (400) is provided at the bottom of the connecting rod (5065). An elastic element (5067) is provided at the connection between the linear module one (5061) and the welding torch crossbeam (503). A rotary cylinder (5068) is provided on the linear module two (5062). The top of the connecting rod (5065) is connected to the output end of the rotary cylinder (5068).

10. An automatic welding method for aluminum alloy round tubes, implemented by the automatic welding device for aluminum alloy round tubes according to any one of claims 1-9, characterized in that: Step 1: Use the positioning pin (3071) and positioning pin plate (3072) to position the initial rotation position of the rotating disk (302); Step 2: Position and install the flanges to be welded on rotating disk one (302) and rotating disk two (202) using flange positioning pins (203) and fasteners (204); Step 3: Use the support part to support the aluminum alloy round tube (400) and use the support part to adjust the position of the aluminum alloy round tube (400); Step 4: Based on the length of the aluminum alloy round tube (400), use handwheel 1 (306) to adjust the position of the driven positioner (300) on the frame (100); Step 5: By tightening the fastening bolts (605), the clamping plate (601) is clamped by the wedge clamping block (603) to complete the fixation of the position of the driven positioner (300); Step 6: Use the control cabinet (5060) to adjust the position of the welding mechanism (500) and control the servo motor on the welding mechanism (500) to drive the welding gun (5063) to move to the welding position to spot weld the flange and the aluminum alloy round tube (400); Step 7: After spot welding is completed, the support is lowered and the aluminum alloy round tube (400) is no longer supported. Automatic welding of the weld is achieved by the rotation of the active positioner (200) and the passive positioner (300) and the welding mechanism (500).

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