Welding device and welding method for aluminum flat pipe production and machining

Abstract

The invention relates to the technical field of aluminum pipe welding, in particular to a welding device for aluminum flat pipe production and processing and a welding method.The welding device comprises a base, two containing frames for containing aluminum flat pipes are slidably installed on the base, abutting assemblies are arranged on the sides, away from each other, of the two containing frames, and limiting plates are slidably installed on the inner sides of the containing frames through electric sliding blocks; the non-welding end of the aluminum flat pipe is fixed through the abutting assemblies, sliding caused by welding impact is effectively prevented, it is ensured that a welding seam and welding parts are kept on the same vertical face all the time, the problems of misalignment and dislocation are solved, the upper side and the lower side of the welding seam are heated at the same time through synchronous welding of the upper welding part and the lower welding part, and the welding quality is improved. The method has the advantages that thermal stress is balanced, warping or twisting deformation caused by single-side high temperature is reduced, residual stress is reduced through synchronous cooling, the method is particularly suitable for thin-wall aluminum flat pipes, structural stability is improved, a uniform fusion area is formed through continuous welding, stress concentration is avoided, and tensile strength, shear resistance and fatigue resistance of weld joints are enhanced.

Description

Technical Field

[0001] This invention relates to the field of aluminum tube welding technology, specifically a welding apparatus and welding method for the production and processing of aluminum flat tubes. Background Technology

[0002] Aluminum flat tubes are hollow aluminum materials with a flat rectangular cross-section. They are commonly used in heat sinks for electronic devices and condensers for air conditioners. When welding aluminum flat tubes, the welding is done on both sides simultaneously, which can complete the weld on both sides in one go. Compared with single-sided welding in multiple stages, the time is reduced by nearly half, making it especially suitable for mass production. At the same time, the heat input on both sides is symmetrical, which offsets thermal stress and significantly reduces the twisting and warping of aluminum flat tubes caused by high temperature. The electric arc forces on both sides promote each other, ensuring complete fusion at the root and avoiding incomplete penetration or poor fusion.

[0003] The prior art discloses Chinese Patent Application No. CN202510012088.7, which discloses a welding fixture for processing aluminum alloy doors and windows. The invention discloses a rotating mechanism that drives the fixture plate to flip, which in turn drives four aluminum alloy extruded profiles to flip, so that the other ends of the four aluminum alloy extruded profiles face upwards, facilitating welding on the other ends. After welding, the four aluminum alloy extruded profiles are below the fixture plate. A lifting mechanism drives two guide sliders downwards, which in turn drive the fixture plate downwards. The fixture plate then moves the four welded aluminum alloy extruded profiles downwards. An L-shaped clamp releases the aluminum alloy extruded profiles, and the welded aluminum alloy extruded profiles fall above a belt conveyor. The belt conveyor moves the welded aluminum alloy extruded profiles away from the fixture plate, thus quickly unloading the welded aluminum alloy extruded profiles and increasing the unloading speed.

[0004] Although the above-mentioned device can perform welding operations on aluminum alloy materials, it still has some drawbacks in use: 1. When the above device is used to weld aluminum alloy, after welding one side, the welded part is flipped over and the opposite side is welded. Before welding, the welded part needs to be re-fixed. The welding efficiency is low. In addition, the heat input of the welding is unstable due to the single-sided welding, which can easily cause the workpiece to twist and warp due to high temperature during welding. 2. The aforementioned device cannot clean the weld before welding. Furthermore, due to the properties of aluminum, an aluminum oxide film easily forms on its surface, which absorbs moisture or grease. At high temperatures, moisture decomposes to produce hydrogen gas, which becomes trapped in the molten pool, forming pores. Without cleaning, aluminum oxide or other contaminants may remain in the weld, forming brittle inclusions. Simultaneously, these contaminants may alter the chemical composition of the molten pool metal, increasing its susceptibility to hot cracking. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device and welding method for the production and processing of aluminum flat tubes, so as to solve the problems of simultaneous welding of aluminum flat tubes from top to bottom and effective cleaning to improve welding quality mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions: A welding device for producing and processing aluminum flat tubes includes a base, on which two sets of placement racks for placing aluminum flat tubes are slidably mounted. Abutment components are provided on the opposite sides of the two placement racks. Limit plates are slidably mounted on the inner sides of the placement racks via electric sliders. Rectangular plates are vertically distributed at the center of the placement racks on both sides. A support frame for fixing the rectangular plates is slidably mounted on the top of the placement racks. The support frame and the rectangular plates are slidably connected via electric sliders. Screws are threadedly mounted on the rectangular plates. Welding components for welding the aluminum flat tubes are provided on the sides of the two screws that are close to each other. A drive unit for controlling the lifting and lowering of the welding components is provided on one side of the rectangular plate.

[0007] Preferably, vertical rods are slidably installed on both sides of the rectangular plate, and a protective frame is installed at the bottom of the vertical rods on both sides. Two sets of symmetrically arranged corner plates are fixedly installed on the top of the protective frame. A shaft is rotatably installed between each set of corner plates. A rotating plate is fixedly installed on the outside of the shaft. A slide is slidably installed in the middle of the rotating plate. A cleaning roller for cleaning aluminum flat tubes before welding is rotatably installed in the middle of the slide. A gear is fixedly installed at one end of the shaft, and a toothed plate fixed to the rectangular plate is provided on one side of the gear.

[0008] Preferably, the drive unit includes a fixed frame fixed to the base, a measuring plate fixedly mounted on one side of the fixed frame, an electric push rod fixedly mounted on the measuring plate, a control frame fixedly mounted on one end of the electric push rod, and a bidirectional telescopic tube rotatably mounted in the middle of the control frame via an electric slider. Both the upper and lower ends of the bidirectional telescopic tube are fixedly mounted with bevel gears.

[0009] Preferably, a vertical plate is slidably installed on the rectangular plate, and a telescopic plate is fixedly installed on the top of the vertical plate. The telescopic plate is rotatably connected to the telescopic end of the bidirectional telescopic tube and the screw on both sides. A bevel gear is fixedly installed on one side of the screw. A support block is fixedly installed on the upper part of the telescopic plate. A sleeve is rotatably installed in the middle of the support block. An inner tube is slidably installed inside the sleeve. A bevel gear is provided at the end of the inner tube that is away from the sleeve.

[0010] Preferably, the inner wall of the sleeve has a circumferentially arranged groove, and a retaining strip is slidably installed in the groove. Multiple retaining strips are fixedly connected to the inner tube on the side closest to each other.

[0011] Preferably, the abutment component includes a bottom block located at the bottom of the placement frame, a cylinder is fixedly installed on one side of the bottom block, an L-shaped movable plate is fixedly installed on the telescopic end of the cylinder, a slide rod is slidably installed in the middle of the movable plate, a protective plate is fixedly installed at one end of the slide rod, and a spring is sleeved on the outside of the slide rod.

[0012] Preferably, a strip plate is provided on the side of the placement rack away from the abutment component. The strip plate is slidably connected to the placement racks on both sides. A pull plate is slidably installed in the middle of the strip plate, and a docking plate is fixedly installed on one side of the pull plate.

[0013] Preferably, the measuring plate has an opening in the middle, a movable block is slidably installed in the opening, a spring is installed between the movable block and the opening, a movable rod is slidably installed in the middle of the movable block, a bonding plate is fixedly installed at one end of the movable rod, and a scale is also provided on one side of the measuring plate.

[0014] Preferably, ear plates are fixedly installed on both sides of the base, and a bidirectional threaded rod is installed between the two ear plates via a motor. Two symmetrically arranged movable frames are rotatably installed on the bidirectional threaded rod. The bottom of the movable frame is slidably connected to the base, and the top of the movable frame is fixedly connected to the placement frame.

[0015] Another object of the present invention is to provide a welding method for a welding apparatus used in the production and processing of aluminum flat tubes, comprising the following steps: S1: Aluminum flat tube connection: Place the two aluminum flat tubes to be welded on the two side racks respectively, and move the aluminum flat tubes close to the docking plate in turn. At this time, the aluminum flat tubes on both sides contact the two sides of the docking plate respectively. Then control the abutting component to abut one end of the aluminum flat tube. Then move the docking plate away from the weld seam where the two aluminum flat tubes need to be welded. S2: Simultaneous welding of upper and lower aluminum flat tubes: The adjustment drive unit for measuring the thickness of the aluminum flat tube is located at the center of the aluminum flat tube thickness. Then, by opening the welding parts, the upper and lower welds of the aluminum flat tube can be welded synchronously. Furthermore, when welding the upper and lower welds of the aluminum flat tube synchronously, the distance between the upper and lower welding parts and the upper and lower welds can be kept consistent.

[0016] The beneficial effects of this invention are: 1. This invention fixes the non-welded end of the aluminum flat tube with an abutment component, effectively preventing slippage caused by welding impact, ensuring that the weld seam always remains on the same vertical plane as the welded parts, avoiding misalignment and misalignment problems. Simultaneous welding of the upper and lower welded parts ensures that the upper and lower sides of the weld seam are heated at the same time, balancing thermal stress and reducing warping or torsional deformation caused by high temperature on one side. Simultaneous cooling reduces residual stress, which is especially suitable for thin-walled aluminum flat tubes, improving structural stability. Continuous welding forms a uniform fusion zone, avoiding stress concentration and enhancing the tensile, shear, and fatigue resistance of the weld seam. The adjustable weld seam height design ensures arc stability and avoids porosity, incomplete penetration, or short circuit problems caused by improper distance. The electric slider drive enables continuous welding, meeting the needs of weld seams of different lengths, balancing efficiency and quality.

[0017] 2. This invention features a cleaning roller that rotates with the rotating plate and closely contacts the surface of the aluminum flat tube before welding. This automatically cleans the weld area, effectively removing impurities and preventing stress concentration or micro-cracks caused by impurities during welding, thus improving welding quality. The relative rotation of the rotating plate provides working space for the welded parts, ensuring interference-free welding. The cleaning roller is always located on both sides of the weld during the welding process, achieving efficient coordination between continuous welding and synchronous cleaning. By utilizing the mechanical movement of the rectangular plate close to the aluminum flat tube to drive the gear plate linkage, no additional power source is required, simplifying the structure, reducing energy consumption, and improving the practicality of the device.

[0018] 3. This invention enables simultaneous welding of the upper and lower surfaces of aluminum flat tubes, improving welding efficiency. By using an electric push rod to drive the control frame to rise and fall, its center point can be flexibly adjusted to the center plane of the aluminum flat tube, adapting to the needs of aluminum flat tubes of different heights. This ensures that the distance between the upper and lower welded parts and the upper and lower weld seams of the aluminum flat tube is consistent, improving welding accuracy and consistency.

[0019] 4. This invention uses a bidirectional telescopic tube to drive the upper and lower screws with reverse threads, enabling the welded parts to move closer or further away synchronously. This ensures precise and symmetrical adjustment of the welding spacing, improves welding alignment efficiency, and links the telescopic plate with the bidirectional telescopic tube to automatically compensate for displacement changes during welding, maintain continuous meshing of the bevel gears, avoid transmission failure, and adapt to the movement requirements of continuous welding.

[0020] 5. This invention allows for the rapid removal of the docking plate by pulling the pull plate, avoiding interference with the welding process. Simultaneously, the abutment component automatically pushes the aluminum flat tube to complete the docking, simplifying the operation process and improving efficiency. The moving block and spring-driven bonding plate can automatically adhere to the surface of the aluminum flat tube, and the height can be directly read through a scale, reducing manual measurement errors and adapting to workpieces of different thicknesses. The electric push rod automatically adjusts the center position of the bidirectional telescopic tube according to the measured height, ensuring that the welding equipment is always aligned with the midpoint of the aluminum flat tube's height, adapting to the synchronous welding requirements of workpieces of different thicknesses. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall front structure of the present invention; Figure 3 This is a schematic diagram of a partial unit structure of the present invention; Figure 4 This is a schematic diagram of the placement rack structure from below; Figure 5This is a schematic diagram of the structure between the rectangular plate and the protective frame of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure between the rectangular plate and the protective frame of the present invention; Figure 7 This is the present invention. Figure 6 A magnified structural diagram of part A; Figure 8 This is a schematic diagram of the structure between the fixing frame and the bonding plate of the present invention; Figure 9 This is a schematic diagram of the structure between the butt plate and the strip plate of the present invention; Figure 10 This is a side cross-sectional view of the structure between the sleeve and the inner tube of the present invention.

[0022] The attached figures are labeled as follows: 1. Base; 10. Ear plate; 12. Double-ended threaded rod; 13. Moving frame; 14. Placement frame; 141. Bottom block; 142. Cylinder; 143. Moving plate; 144. Slide rod; 145. Protective plate; 146. Limiting plate; 147. Support frame; 15. Strip plate; 151. Pull plate; 152. Butt joint plate; 2. Fixing frame; 20. Measuring plate; 201. Through port; 202. Moving block; 203. Moving rod; 204. Adhesive plate; 21. Electric 22. Push rod; 24. Control frame; 3. Bidirectional telescopic tube; 3. Rectangular plate; 31. Screw; 32. Vertical rod; 33. Protective frame; 331. Angle plate; 332. Shaft; 333. Rotating plate; 334. Slide; 335. Cleaning roller; 34. Welded parts; 4. Vertical plate; 41. Telescopic plate; 42. Support block; 43. Sleeve; 431. Inner tube; 432. Groove; 433. Clip; 44. Bevel gear one; 45. Bevel gear two; 46. Bevel gear three. Detailed Implementation

[0023] 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.

[0024] As attached Figure 1-10As shown, a welding device for producing and processing aluminum flat tubes includes a base 1. Two sets of placement racks 14 for placing aluminum flat tubes are slidably installed on the base 1. The two placement racks 14 have abutment components on the side away from each other. Limit plates 146 are slidably installed on the inner side of the placement racks 14 via electric sliders. Rectangular plates 3 are distributed vertically at the center of the placement racks 14 on both sides. A support frame 147 for fixing the rectangular plates 3 is slidably installed on the top of the placement racks 14. The support frame 147 is a vertical telescopic structure. The support frame 147 and the rectangular plates 3 are slidably connected via electric sliders. A screw 31 is rotatably installed on the rectangular plate 3. Welding parts 34 for welding aluminum flat tubes are provided on the side of the upper and lower screws 31 that are close to each other. A drive unit for controlling the lifting and lowering of the welding parts 34 is provided on one side of the rectangular plate 3. By setting the abutting components on the two placement frames 14, the non-welded ends of the aluminum flat tubes can be abutted respectively, avoiding the relative sliding of the aluminum flat tubes due to impact during welding. This ensures that the weld seam of the two aluminum flat tubes is always in the same vertical plane as the upper and lower welding parts 34. Furthermore, by abutting the non-welded ends, the two aluminum flat tubes can always be in the preset position during the welding process, avoiding misalignment and displacement. The drive unit enables the upper and lower welding components 34 to simultaneously weld the upper and lower weld seams. These welding components 34 are existing technology and will not be described in detail. Simultaneous heating of the upper and lower surfaces of the weld seam balances thermal stress, preventing warping or twisting caused by localized high temperatures during unilateral welding. After welding, the weld joints of the upper and lower weld seams cool simultaneously. This simultaneous cooling helps reduce residual stress, which is especially important for thin-walled aluminum flat tubes. Furthermore, the electric slider moves the rectangular plate 3 on the support frame 147, allowing the upper and lower welding components 34 to continuously weld along the weld seam simultaneously. Welding has several advantages. First, continuous welding can form a uniform fusion zone, avoiding stress concentration caused by intermittent welding and improving the tensile, shear, and fatigue resistance of the weld to meet the welding requirements of welds of different lengths. Second, continuous welding allows heat to be transferred evenly along the weld, reducing aluminum tube deformation caused by local overheating. Compared with intermittent welding, continuous welding can reduce internal stress caused by uneven shrinkage by controlling the welding speed and parameters. Compared with existing devices, this invention can meet the welding requirements of welds of different lengths while reducing aluminum tube deformation caused by local overheating through continuous welding. At the same time, continuous welding facilitates the aesthetics of the weld. The lifting and lowering motion is achieved by rotating the screw 31 on the rectangular plate 3, thereby synchronously adjusting the vertical position of the weldment 34. On the one hand, if the distance between the weldment 34 and the weld is too large, the arc will be elongated and the energy will be dispersed, which will easily produce porosity or incomplete penetration; if the distance is too small, it may cause short circuit or spatter. Therefore, the appropriate distance is conducive to maintaining the stability of the arc to meet different welding heights. On the other hand, aluminum welding requires inert gas (such as argon) to protect the molten pool. If the distance is too high, the gas protective layer may be disturbed by the airflow, resulting in oxidation (aluminum easily reacts with oxygen to form aluminum oxide). If the distance is too close, the molten pool may be disturbed by the strong airflow. By adjusting the height between the weldment 34 and the weld, the gas coverage range can be optimized, and weld oxidation and porosity can be reduced.

[0025] Vertical rods 32 are slidably installed on both sides of the rectangular plate 3. A protective frame 33 is installed at the bottom of the vertical rods 32 on both sides. Two sets of symmetrically arranged corner plates 331 are fixedly installed on the top of the protective frame 33. A shaft 332 is rotatably installed between each set of corner plates 331. A rotating plate 333 is fixedly installed on the outside of the shaft 332. A slide 334 is slidably installed in the middle of the rotating plate 333. A cleaning roller 335 for cleaning aluminum flat tubes before welding is rotatably installed in the middle of the slide 334. A gear is fixedly installed at one end of the shaft 332. A toothed plate fixed to the rectangular plate 3 is provided on one side of the gear. A spring is installed on the outside of the vertical rod 32, so the vertical rod 32 drives the protective frame 33 to contact the surface of the aluminum flat tube first. When the rectangular plate 3 approaches the aluminum flat tube, the toothed plate drives the gear to rotate. When the gear rotates, it drives the shaft 332 to rotate. The shaft 332 drives the rotating plate 333 to rotate. The rotating plates 333 on both sides rotate relative to each other when the rectangular plate 3 approaches the aluminum flat tube. At this time, the slide 334 drives the cleaning roller 335 to move within the rotating plate 333 while the rotating plate 333 rotates. This allows the cleaning roller 335 to clean the weld before welding, while ensuring that the cleaning roller 335 remains in constant motion without affecting the rotation of the rotating plate 333. Compared to existing devices, this invention, by bringing the rectangular plate 3 closer to the aluminum flat tube, allows the two rotating plates 333 to rotate relative to each other, creating space below the welding component 34 so that the welding component 34 can perform welding operations at the weld joint. At the same time, when the two rotating plates 333 rotate relative to each other, the cleaning roller 335 can roll and clean the weld joint to remove impurities. Furthermore, the cleaning roller 335 is located on both sides of the welding component 34 when the welding component 34 is working. When the weld joint is continuously welded, the cleaning roller 335 can always pre-clean the weld joint before welding, effectively avoiding stress concentration or micro-cracks at the weld joint caused by impurities.

[0026] The drive unit includes a fixed frame 2 fixed to the base 1. A measuring plate 20 is fixedly installed on one side of the fixed frame 2. An electric push rod 21 is fixedly installed on the measuring plate 20. A control frame 22 is fixedly installed at one end of the electric push rod 21. A bidirectional telescopic tube 24 is installed in the middle of the control frame 22 through an electric slider. A bevel gear 45 is fixedly installed at both the upper and lower ends of the bidirectional telescopic tube 24. The electric push rod 21 enables the control frame 22 to be raised and lowered. By making the control frame 22 easy to raise and lower, the center of the electric push rod 21 is aligned with the center of the aluminum flat tube. The center point of the electric push rod 21 is aligned with the midpoint of the height of the aluminum flat tube, so that the distance between the upper and lower welding parts 34 and the upper and lower weld seams of the aluminum flat tube is consistent. Compared with the existing device, this invention can simultaneously weld the upper and lower surfaces of the aluminum flat tube, and can also conveniently adjust the height of the center point of the electric push rod 21 according to the different center points of the aluminum flat tubes of different heights, so that the distance between the upper and lower welding parts 34 and the upper and lower weld seams is consistent.

[0027] A vertical plate 4 is slidably installed on a rectangular plate 3. A telescopic plate 41 is fixedly installed on the top of the vertical plate 4. The telescopic plate 41 is rotatably connected to the telescopic end of the bidirectional telescopic tube 24 and the screw 31 on both sides through bearings. A bevel gear 46 is fixedly installed on one side of the screw 31. A support block 42 is fixedly installed on the upper end of the telescopic plate 41. A sleeve 43 is rotatably installed in the middle of the support block 42. An inner tube 431 is slidably installed inside the sleeve 43. A bevel gear 44 is provided at the end of the inner tube 43 that is away from the sleeve 43. When the distance between the upper and lower screws 31 and the welding point is adjusted, the electric slider is activated, causing the bidirectional telescopic tube 24 to rotate. Simultaneously, the bidirectional telescopic tube 24 rotates, driving the upper and lower bevel gears 45 to rotate. When the bevel gears 45 rotate, they mesh with one bevel gear 44 on one side, thereby driving the sleeve 43 to rotate. When the sleeve 43 rotates, the other bevel gear 44, through its interaction with the third bevel gear 46, drives the screw 31 to rotate. The rotation of the screw 31 causes the welded part 34 to rise and fall. It should be noted that the thread directions of the upper and lower screws 31 are opposite. Therefore, when the bidirectional telescopic tube 24 rotates clockwise, the upper and lower welded parts 34 move closer together, and vice versa. Since the screws 31 are located on the telescopic plate 41... The screw 31 is rotated on one side, so when it rises and falls, it synchronously drives the telescopic plate 41 to rise and fall. When the telescopic plate 41 rises and falls, it synchronously drives the telescopic end of the bidirectional telescopic tube 24 to extend and retract. Since the telescopic end of the bidirectional telescopic tube 24 is rotated and connected inside the telescopic plate 41, while the telescopic plate 41 drives the bidirectional telescopic tube 24 to extend and retract, the bidirectional telescopic tube 24 can also rotate on one side of the telescopic plate 41. Furthermore, the inner tube 431 and the sleeve 43 are connected by a spring located inside the sleeve 43. Therefore, when the rectangular plate 3 moves and drives the welded part 34 to perform continuous welding at the weld, the telescopic plate 41 follows the movement of the rectangular plate 3 to extend and retract adaptively, so that the bevel gear 1 44 and the bevel gear 2 45 are always meshed.

[0028] The inner wall of the sleeve 43 is provided with a circumferentially arranged groove 432. A retaining strip 433 is slidably installed in the groove 432. Multiple retaining strips 433 are fixedly connected to the inner tube 431 on the side close to each other. By sliding the retaining strip 433 in the groove 432, the inner tube 431 can rotate with the sleeve 43, and the inner tube 431 can also slide and extend within the sleeve 43.

[0029] The abutting assembly includes a bottom block 141 located at the bottom of the placement frame 14. A cylinder 142 is fixedly installed on one side of the bottom block 141. An L-shaped movable plate 143 is fixedly installed at the telescopic end of the cylinder 142. A slide rod 144 is slidably installed in the middle of the movable plate 143. A protective plate 145 is fixedly installed at one end of the slide rod 144. A spring is sleeved on the outside of the slide rod 144. The cylinder 142 can move the moving plate 143 closer to or away from the placement frame 14. When the moving plate 143 is close to the placement frame 14, it can abut and limit the non-welded end of the aluminum flat tube, effectively preventing the two aluminum flat tubes from shifting during welding after docking, thus affecting the welding quality.

[0030] A strip plate 15 is provided on the side of the placement rack 14 away from the abutting component. The strip plate 15 is slidably connected to the placement racks 14 on both sides. A pull plate 151 is slidably installed in the middle of the strip plate 15. A docking plate 152 is fixedly installed on one side of the pull plate 151. The docking plate 152 allows the welding surfaces of the two aluminum flat tubes to be positioned so that they are aligned with the welding component 34 above. Then, the pulling plate 151 is pulled to move the docking plate 152 between the two aluminum flat tubes. With the cooperation of the abutment component, the two aluminum flat tubes are then joined together, thereby ensuring the accuracy of welding the two aluminum flat tubes.

[0031] A through-hole 201 is provided in the middle of the measuring plate 20. A moving block 202 is slidably installed in the through-hole 201. A spring is installed between the moving block 202 and the through-hole 201. A moving rod 203 is slidably installed in the middle of the moving block 202. A bonding plate 204 is fixedly installed at one end of the moving rod 203. A scale is also provided on one side of the measuring plate 20. By pushing the moving rod 203 in the moving block 202, the bonding plate 204 is placed above the aluminum flat tube. Then, under the action of the spring, the bonding plate 204 can be driven to adhere to the surface of the aluminum flat tube. The height of the aluminum flat tube can then be obtained by observing the scale. Then, the electric push rod 21 is adjusted to drive the bidirectional telescopic tube 24 to move, so that the center point of the electric push rod 21 is consistent with the midpoint of the height of the aluminum flat tube, thus satisfying the requirement of synchronous welding of aluminum flat tubes of different thicknesses from top to bottom.

[0032] Ear plates 10 are fixedly installed on both sides of the base 1. A bidirectional threaded rod 12 is installed between the two ear plates 10 via a motor. Two symmetrically arranged movable frames 13 are rotatably installed on the bidirectional threaded rod 12. The bottom of the movable frame 13 is slidably connected to the base 1, and the top of the movable frame 13 is fixedly connected to the placement frame 14. The motor drives the bidirectional threaded rod 12 to rotate. When the bidirectional threaded rod 12 rotates, it causes the two movable frames 13 to move closer or further apart, thereby adjusting the distance between the two placement frames 14.

[0033] During operation, two aluminum flat tubes are placed on the placement rack 14, and then the two placement racks 14 are controlled to move the aluminum flat tubes closer to each other until the welding surfaces of the two aluminum flat tubes to be welded are in contact with the two sides of the butt plate 152. Then, the non-welding ends of the aluminum flat tubes are fixed by the abutting components. Then, the pull plate 151 is pulled to pull the butt plate 152 out from between the two aluminum flat tubes. Then, the abutting components are opened again to push the aluminum flat tubes. The abutting components on both sides push the two aluminum flat tubes to keep them in the same position when moving. The function of the butt plate 152 and the abutting components is to ensure that when two aluminum flat tubes of different lengths are butted, the welding ends are aligned with the bottom of the weldment 34 after they are joined. At the same time, the abutting components fix the non-welding ends. After the butt plate 152 is moved out from between the two aluminum flat tubes, the abutting components on both sides move the two aluminum flat tubes synchronously so that the weld formed is on the same plane as the weldment 34. When the welding component 34 continuously welds the weld seam formed by the two aluminum flat tubes, the electric slider is activated to drive the rectangular plate 3 to move linearly. When the rectangular plate 3 moves, it can drive the welding component 34 to move, thereby continuously welding the weld seam.

[0034] Another object of the present invention is to provide a welding method for a welding apparatus used in the production and processing of aluminum flat tubes, comprising the following steps: S1: Aluminum flat tube connection: Place the two aluminum flat tubes to be welded on the two side racks 14 respectively, and move the aluminum flat tubes close to the docking plate 152 in turn. At this time, the aluminum flat tubes on both sides contact the two sides of the docking plate 152 respectively. Then control the abutting component to abut one end of the aluminum flat tube. Then move the docking plate 152 away from the weld seam where the two aluminum flat tubes need to be welded. S2: Simultaneous welding of upper and lower aluminum flat tubes: The adjustment drive unit for measuring the thickness of the aluminum flat tube is located at the center of the aluminum flat tube thickness. Then, by opening the welding component 34, the synchronous welding of the upper and lower welds of the aluminum flat tube can be achieved. Furthermore, when welding the upper and lower welds of the aluminum flat tube synchronously, the distance between the upper and lower welding components 34 and the upper and lower welds can be kept consistent.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A welding device for the production and processing of aluminum flat tubes, comprising a base (1), characterized in that, Two sets of placement racks (14) for placing aluminum flat tubes are slidably installed on the base (1). The two placement racks (14) are provided with abutment components on the side away from each other. Limit plates (146) are slidably installed on the inner side of the placement racks (14) by electric sliders. Rectangular plates (3) are distributed vertically at the center of the two placement racks (14). A support frame (147) for fixing the rectangular plates (3) is slidably installed on the top of the placement racks (14). The support frame (147) and the rectangular plates (3) are slidably connected by electric sliders. A screw (31) is rotatably installed on the rectangular plates (3). Welding parts (34) for welding aluminum flat tubes are provided on the side of the upper and lower screws (31) that are close to each other. A drive unit for controlling the lifting and lowering of the welding parts (34) is provided on one side of the rectangular plates (3).

2. The welding device for aluminum flat tube production and processing according to claim 1, characterized in that, Vertical rods (32) are slidably installed on both sides of the rectangular plate (3). A protective frame (33) is installed at the bottom of the vertical rods (32) on both sides. Two sets of symmetrically arranged corner plates (331) are fixedly installed on the top of the protective frame (33). A shaft (332) is rotatably installed between each set of corner plates (331). A rotating plate (333) is fixedly installed on the outside of the shaft (332). A slide (334) is slidably installed in the middle of the rotating plate (333). A cleaning roller (335) for cleaning aluminum flat tubes before welding is rotatably installed in the middle of the slide (334). A gear is fixedly installed at one end of the shaft (332). A toothed plate fixed to the rectangular plate (3) is provided on one side of the gear.

3. The welding device for aluminum flat tube production and processing according to claim 1, characterized in that, The drive unit includes a fixed frame (2) fixed to the base (1), a measuring plate (20) fixedly installed on one side of the fixed frame (2), an electric push rod (21) fixedly installed on the measuring plate (20), a control frame (22) fixedly installed at one end of the electric push rod (21), a bidirectional telescopic tube (24) is installed in the middle of the control frame (22) through an electric slider, and bevel gears (45) are fixedly installed at both the upper and lower ends of the bidirectional telescopic tube (24).

4. The welding device for aluminum flat tube production and processing according to claim 3, characterized in that, A vertical plate (4) is slidably installed on the rectangular plate (3). A telescopic plate (41) is fixedly installed on the top of the vertical plate (4). The telescopic plate (41) is rotatably connected to the telescopic end of the bidirectional telescopic tube (24) and the screw (31) on both sides respectively. A bevel gear (46) is fixedly installed on one side of the screw (31). A support block (42) is fixedly installed on the upper end of the telescopic plate (41). A sleeve (43) is rotatably installed in the middle of the support block (42). An inner tube (431) is slidably installed inside the sleeve (43). A bevel gear (44) is provided at the end of the inner tube (431) that is far away from the sleeve (43).

5. The welding device for aluminum flat tube production and processing according to claim 4, characterized in that, The inner wall of the sleeve (43) is provided with a circumferentially arranged groove (432), and a retaining strip (433) is slidably installed in the groove (432). The multiple retaining strips (433) are fixedly connected to the inner tube (431) on the side close to each other.

6. The welding device for aluminum flat tube production and processing according to claim 1, characterized in that, The abutting assembly includes a bottom block (141) located at the bottom of the placement frame (14). A cylinder (142) is fixedly installed on one side of the bottom block (141). An L-shaped movable plate (143) is fixedly installed at the telescopic end of the cylinder (142). A slide rod (144) is slidably installed in the middle of the movable plate (143). A protective plate (145) is fixedly installed at one end of the slide rod (144). A spring is sleeved on the outside of the slide rod (144). The two ends of the spring abut against the movable plate (143) and the protective plate (145) respectively.

7. The welding device for producing and processing aluminum flat tubes according to claim 6, characterized in that, The placement rack (14) has a strip plate (15) on the side away from the abutment component. The strip plate (15) is slidably connected to the placement racks (14) on both sides. A pull plate (151) is slidably installed in the middle of the strip plate (15), and a docking plate (152) is fixedly installed on one side of the pull plate (151).

8. The welding device for aluminum flat tube production and processing according to claim 3, characterized in that, The measuring plate (20) has an opening (201) in the middle, a moving block (202) is slidably installed in the opening (201), a spring is installed between the moving block (202) and the opening (201), a moving rod (203) is slidably installed in the middle of the moving block (202), a bonding plate (204) is fixedly installed at one end of the moving rod (203), and a scale is also provided on one side of the measuring plate (20).

9. The welding device for producing and processing aluminum flat tubes according to claim 1, characterized in that, Ear plates (10) are fixedly installed on both sides of the base (1). A bidirectional threaded rod (12) is installed between the two ear plates (10) via a motor. Two symmetrically arranged movable frames (13) are installed on the bidirectional threaded rod (12). The bottom of the movable frame (13) is slidably connected to the base (1), and the top of the movable frame (13) is fixedly connected to the placement frame (14).

10. A welding method for a welding apparatus used in the production and processing of aluminum flat tubes, applied to the welding apparatus described in claim 6, characterized in that, Includes the following steps: S1: Aluminum flat tube connection: Place the two aluminum flat tubes to be welded on the two side racks (14) respectively, and move the aluminum flat tubes close to the docking plate (152) in turn. At this time, the aluminum flat tubes on both sides contact the two sides of the docking plate (152) respectively. Then control the abutting component to abut one end of the aluminum flat tube, and then move the docking plate (152) away from the weld seam where the two aluminum flat tubes need to be welded. S2: Simultaneous welding of upper and lower aluminum flat tubes: The adjustment drive unit for measuring the thickness of the aluminum flat tube is located at the center of the aluminum flat tube thickness. Then, by opening the welding part (34), the upper and lower welds of the aluminum flat tube can be welded synchronously. When welding the upper and lower welds of the aluminum flat tube synchronously, the distance between the upper and lower welding parts (34) and the upper and lower welds can be kept consistent.

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