A welding device and method for aluminum profile doors and windows

Abstract

The application relates to the technical field of door and window welding, and discloses a welding device and method for aluminum profile doors and windows, which comprises a workbench and a gas supply assembly. A plurality of L-shaped hollow blocks arranged in a rectangular shape are arranged on the top surface of the workbench, a loading block is arranged on the middle of the top surface of the workbench, a plurality of air cylinders are arranged around the loading block, a right-angle piece is arranged at the driving end of each air cylinder, a plurality of right-angle pieces correspond to the plurality of L-shaped hollow blocks and form corresponding constraint spaces, and the right-angle pieces are driven by the air cylinders to move close to or away from the L-shaped hollow blocks to adjust the size of the constraint spaces. The application positions the aluminum profile frame by forming a constraint space through the right-angle piece and the L-shaped hollow block, avoids the problem of traditional block concave, integrates the preheating, cleaning and protective gas functions, reduces the thermal stress and prevents oxidation, drives the intermittent vibration of the pneumatic knocking piece by the protective gas to eliminate the residual stress, switches the gas path during welding to make the knocking piece become an auxiliary clamp, forms inner and outer clamping with the right-angle piece, and improves the welding quality of the door and window frame.

Description

Technical Field

[0001] This invention relates to the field of door and window welding technology, and in particular to a welding device and method for aluminum profile doors and windows. Background Technology

[0002] In the field of building doors and windows, aluminum alloy profile doors and windows are widely used as a component of the building's external envelope due to their good physical properties and decorative effects. Aluminum profile doors and windows mainly serve multiple functions such as lighting and ventilation, interior and exterior separation, and visual aesthetics. They also have the functions of resisting wind and rain erosion, sound insulation and noise reduction, and heat insulation, in order to create a comfortable indoor environment. Aluminum profile doors and windows usually adopt a rectangular frame structure, which is composed of multiple aluminum profiles welded together. The middle position of the frame is reserved for installation space for inlaying and fixing glass panels.

[0003] In the existing welding and forming process of aluminum profile door and window frames, the usual operation process is to position and weld in stages. That is, the first two aluminum profiles that make up the rectangular frame are positioned first. After the connection is welded, the remaining profiles are assembled and welded in sequence. In this process, the positioning of aluminum profiles mostly relies on the pressing and fixing method. The cylinder drives the pressure block to act directly on the surface of the profile to achieve positioning. However, the concentrated force of the pressure block can easily cause local dents or deformations on the surface of the aluminum profile, affecting the appearance quality. Moreover, due to the lack of a constraint mechanism for the position of the aluminum profile assembly, if the first set of aluminum profiles is relatively offset during the welding process, it will lead to the non-standard rectangular doors and windows formed by subsequent welding, affecting the overall regularity and assembly quality of the doors and windows.

[0004] To address the aforementioned issues, this application proposes a welding device and method for aluminum profile doors and windows. Summary of the Invention

[0005] This invention proposes a welding device and method for aluminum profile doors and windows, which solves the problems in the existing aluminum profile door and window frame welding in related technologies, which adopts sequential positioning and step-by-step assembly welding, relies on cylinder-driven pressure blocks to concentrate force, which easily causes the profile surface to be concave, lacks assembly position constraints, and the first welding offset will affect subsequent assembly, reducing the regularity and assembly quality of doors and windows.

[0006] The present invention provides a welding device for aluminum profile doors and windows, comprising a workbench and an air supply assembly;

[0007] The top surface of the workbench is equipped with multiple L-shaped hollow blocks arranged in a rectangle. A loading block is installed in the middle of the top surface of the workbench. Cylinders are installed around the loading blocks. A right-angle component is installed at the drive end of each cylinder. The multiple right-angle components correspond to the multiple L-shaped hollow blocks and form corresponding constraint spaces. The right-angle components are driven by the cylinders to move closer to or further away from the L-shaped hollow blocks to adjust the size of the constraint space.

[0008] An air blowing hole is provided on the inner side of the L-shaped hollow block. A pneumatic striking component for striking aluminum profiles is installed on the L-shaped hollow block. The air supply component is connected to the L-shaped hollow block and the pneumatic striking component. When the air supply component delivers gas to the L-shaped hollow block and the pneumatic striking component, part of the gas is discharged through the air blowing hole, and the other part of the gas pushes the pneumatic striking component to strike the aluminum profile.

[0009] The workbench is equipped with welding components for welding aluminum profiles;

[0010] The welding method of the aluminum profile door and window welding device includes the following steps:

[0011] Step 1: Place multiple aluminum profiles along the inner edges of multiple L-shaped hollow blocks to form a rectangular aluminum profile door and window frame;

[0012] Step 2: Using the cylinders around the loading block, drive multiple right-angle pieces toward multiple L-shaped hollow blocks, adjust the size of the constraint space between the right-angle pieces and the L-shaped hollow blocks, and use the right-angle pieces to press against the inside of the aluminum profile door and window frame, so that the four corners of the aluminum profile door and window frame are placed in the corresponding constraint space, thus completing the overall positioning of the aluminum profile door and window frame.

[0013] Step 3: The gas supply component heats the protective gas and delivers it into the L-shaped hollow block. The protective gas entering the L-shaped hollow block is discharged through the air blowing hole, preheating the corner welds of the aluminum profile door and window frame in the confined space and forming a protective gas around them.

[0014] Step 4: When welding the aluminum profile door and window frame, turn off the function of heating the protective gas in the gas supply component, and then weld the four corners of the aluminum profile door and window frame in sequence through the welding parts.

[0015] Step 5: When welding the four corner joints of the aluminum profile door and window frame, the gas supply component delivers a portion of the gas to the pneumatic hammer, which pushes the pneumatic hammer to strike the aluminum profile door and window frame to eliminate the stress during welding.

[0016] As a further optimization of the present invention, the right-angle component includes a right-angle block, and a right-angle block is installed on the drive end of each cylinder. A constraint space is formed between the right-angle block and the L-shaped hollow block. Multiple spaced loading holes are opened on the outer side of the right-angle block, and an elastic top for pressing against the aluminum profile is installed in each loading hole.

[0017] As a further optimization of the present invention, the elastic top includes a first spring and a dome head, and a first spring is installed in each loading hole, with a dome head extending out of the loading hole connected to the end of the first spring.

[0018] As a further optimization of the present invention, the pneumatic striking component includes a loading tube, an L-shaped tube, and an elastic striking part. Two loading tubes are installed at the bottom of the L-shaped hollow block, and the two ends of the loading tubes pass through both sides of the L-shaped hollow block. One end of the loading tube is connected to a first air inlet pipe, and the L-shaped tube is connected to the two first air inlet pipes. The air supply component is connected to the L-shaped tube. A vent valve is installed on the first air inlet pipe. A striking port is opened at the other end of the loading tube, and an elastic striking part is installed inside the loading tube.

[0019] As a further optimization of the present invention, the elastic striking part includes a second spring, which is installed in the loading tube. A piston is connected to one end of the second spring near the striking port, and a striking rod is fixed to the side of the piston near the striking port.

[0020] As a further optimization of the present invention, the air supply assembly includes a rectangular tube and a heating diverter. The rectangular tube is disposed on the top surface of the workbench and arranged around multiple L-shaped hollow blocks. Multiple heating diverters are connected to the inner side of the rectangular tube. The multiple heating diverters are respectively connected to multiple L-shaped hollow blocks and multiple L-shaped tubes. A second air inlet pipe is connected to the outer periphery of the rectangular tube.

[0021] As a further optimization of the present invention, the heating diversion component includes a first air guide pipe, and multiple first air guide pipes are connected to the inner side of the rectangular tube. One end of the first air guide pipe is connected to an air passage cylinder, and an outer cylinder is fixed to the outer periphery of the air passage cylinder. A heating chamber is formed between the air passage cylinder and the outer cylinder. A spiral heating wire fitted on the air passage cylinder is disposed in the heating chamber. One end of the air passage cylinder is connected to a second air guide pipe, and one end of the second air guide pipe is connected to a U-shaped pipe. The two ends of the multiple U-shaped pipes are respectively connected to multiple L-shaped hollow blocks and multiple L-shaped pipes. A first valve and a second valve are respectively installed at the two ends of the U-shaped pipes.

[0022] As a further optimization of the present invention, the end of the second air inlet pipe away from the rectangular tube is used to connect to an air pump for supplying protective gas.

[0023] As a further optimization of the present invention, the welded component includes a rectangular guide rail and a welding robot. The rectangular guide rail is installed on the top surface of the worktable, the welding robot is installed at the drive end of the rectangular guide rail, and a welding torch for welding aluminum profiles is installed at the free end of the welding robot.

[0024] A welding method for aluminum profile doors and windows, employing the aforementioned welding device for aluminum profile doors and windows, includes the following steps:

[0025] Step 1: Place multiple aluminum profiles along the inner edges of multiple L-shaped hollow blocks to form a rectangular aluminum profile door and window frame;

[0026] Step 2: Using the cylinders around the loading block, drive multiple right-angle pieces toward multiple L-shaped hollow blocks, adjust the size of the constraint space between the right-angle pieces and the L-shaped hollow blocks, and use the right-angle pieces to press against the inside of the aluminum profile door and window frame, so that the four corners of the aluminum profile door and window frame are placed in the corresponding constraint space, thus completing the overall positioning of the aluminum profile door and window frame.

[0027] Step 3: The gas supply component heats the protective gas and delivers it into the L-shaped hollow block. The protective gas entering the L-shaped hollow block is discharged through the air blowing hole, preheating the corner welds of the aluminum profile door and window frame in the confined space and forming a protective gas around them.

[0028] Step 4: When welding the aluminum profile door and window frame, turn off the function of heating the protective gas in the gas supply component, and then weld the four corners of the aluminum profile door and window frame in sequence through the welding parts.

[0029] Step 5: When welding the four corner joints of the aluminum profile door and window frame, the gas supply component delivers a portion of the gas to the pneumatic hammer, which pushes the pneumatic hammer to strike the aluminum profile door and window frame to eliminate the stress during welding.

[0030] Step Six: After welding is completed, the cylinder drives the right-angle piece away from the L-shaped hollow block, releasing the positioning of the aluminum profile door and window frame, and then the aluminum profile door and window frame can be removed.

[0031] The above-described technical solution of the present invention has the following beneficial technical effects:

[0032] 1. Multiple aluminum profiles are placed on a workbench and positioned along the inner edges of multiple L-shaped hollow blocks to form a rectangular frame. Cylinders around the loading blocks drive multiple right-angle pieces closer to the L-shaped hollow blocks. The size of the constraint space between the right-angle pieces and the L-shaped hollow blocks is adjusted. The right-angle pieces press against the inner side of the aluminum profile frame. When the right-angle pieces press against the inner side of the aluminum profile frame, the elastic top of the right-angle pieces can elastically press against the inner side of the aluminum profile frame, placing the four corners of the aluminum profile frame within their respective constraint spaces. This completes the overall positioning of the aluminum profile door and window frame, providing a constraint function. The above design, through the constraint space formed by the right-angle pieces and L-shaped hollow blocks, combined with the elastic pressing of the elastic top, achieves the overall positioning of the aluminum profile frame. This effectively avoids surface depression caused by concentrated force on traditional pressure blocks. Simultaneously, by constraining the corner positions, relative displacement of the profiles during welding is prevented, thus ensuring the regularity of the rectangular frame and improving the final assembly quality of the doors and windows.

[0033] 2. Before welding the aluminum profile door and window frame, the protective gas is heated by the gas supply assembly and then delivered to the L-shaped hollow block. The protective gas enters the rectangular tube through the second air inlet pipe, and then enters the heating distributor. After being heated by the spiral heating wire, the first valve on the U-shaped tube is opened and the second valve is closed. The gas enters the L-shaped hollow block through the U-shaped tube and is discharged through the air blowing hole. This preheats the welding area to reduce thermal stress, forms a protective gas layer, and blows away dust. During welding, the spiral heating wire is turned off, and welding is performed through the welding part. This design integrates preheating, cleaning, and protection, effectively eliminating thermal stress, preventing weld oxidation, and improving welding quality.

[0034] 3. When welding the four corners of the aluminum profile frame, open the second valve on the U-shaped tube to deliver some gas to the pneumatic striking component. The protective gas first enters the L-shaped tube in the pneumatic striking component, and then enters the loading tube through the first air inlet pipe. This pushes the elastic striking part inside to extend outward and strike the aluminum profile during the welding process, thereby reducing porosity and looseness inside the aluminum profile. It further removes the stress at the corner joints of the aluminum profile door and window frame during welding. After one strike, the gas is released through the vent valve on the first air inlet pipe, allowing the protective gas in the loading tube to be discharged. The elastic striking part returns to its original position, and then the vent valve is closed. The protective gas continues to enter the loading tube for a second strike. The above design uses protective gas as a power source to drive the pneumatic striking component to intermittently strike the welding area. The residual stress in the weld and heat-affected zone is effectively eliminated through vibration aging. At the same time, vibration helps the bubbles in the molten pool to escape, reducing porosity and looseness, thereby enhancing the density of the weld.

[0035] 4. During welding, after a single tap to achieve vibration, the gas entering the loading pipe maintains the elastic tapping part's pressure against the aluminum profile. Then, the second valve on the U-shaped tube is closed, leaving the gas inside the loading pipe. This allows the elastic tapping part within the loading pipe to continuously press against the aluminum profile, further forming an internal and external clamping structure with the right-angle piece. This maintains the stability of the aluminum profile door and window frame during welding. After the welding of the four corners of the aluminum profile door and window frame is completed, the cylinder drives the right-angle piece away from the L-shaped hollow block, releasing the positioning of the aluminum profile door and window frame, allowing the aluminum alloy door and window frame to be removed. This design, by switching the air path, transforms the pneumatic tapping part originally used for tapping into an auxiliary clamp. Its elastic tapping part continuously presses against the aluminum profile during welding, forming an internal and external clamping force with the outer right-angle piece. This enhances the stability of the aluminum profile door and window frame under high welding temperatures, preventing displacement during welding and further ensuring the quality of the door and window frame welding. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of a welding device for aluminum profile doors and windows proposed in this invention;

[0037] Figure 2 This is a schematic diagram of the cooperative structure of the L-shaped hollow block, right-angled piece, pneumatic striking piece and air supply assembly in this invention;

[0038] Figure 3 This is a schematic diagram of the cooperative structure of the loading block, cylinder and right-angled component in this invention;

[0039] Figure 4 This is an internal sectional view of the right-angled block in this invention;

[0040] Figure 5 This is a schematic diagram of the cooperation structure between the L-shaped hollow block and the gas supply component in this invention;

[0041] Figure 6 This is a schematic diagram of the mating structure between the L-shaped hollow block and the pneumatic striking component in this invention;

[0042] Figure 7 This is an internal cross-sectional view of the loading tube in this invention;

[0043] Figure 8 This is a schematic diagram of the back structure of the L-shaped hollow block in this invention;

[0044] Figure 9 This is a schematic diagram of the gas supply component in this invention;

[0045] Figure 10 This is an internal sectional view of the outer cylinder in this invention;

[0046] Figure 11 This is a schematic diagram of the structure of the welded component in this invention.

[0047] Reference numerals: 1. Workbench; 101. Loading block; 102. Cylinder; 2. Welding component; 21. Rectangular guide rail; 22. Welding robot; 23. Welding torch; 3. L-shaped hollow block; 31. Air inlet; 4. Right-angle component; 41. Right-angle block; 42. Elastic top; 421. First spring; 422. Dome head; 5. Pneumatic striking component; 51. Loading pipe; 511. First air inlet pipe; 512. Air release valve; 52. 53. L-shaped tube; 53. Elastic striking part; 531. Second spring; 532. Piston; 533. Striking rod; 6. Air supply assembly; 61. Rectangular tube; 611. Second air inlet pipe; 62. Heating diverter; 621. First air guide pipe; 622. Air passage cylinder; 623. Outer cylinder; 624. Spiral heating wire; 625. Second air guide pipe; 626. U-shaped tube; 6261. First valve; 6262. Second valve. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0049] like Figure 1-11 As shown, the present invention provides a welding device for aluminum profile doors and windows, comprising a workbench 1 and an air supply component 6.

[0050] The top surface of the workbench 1 is equipped with multiple L-shaped hollow blocks 3 arranged in a rectangular shape. A loading block 101 is installed in the middle of the top surface of the workbench 1. Cylinders 102 are installed around the loading block 101. A right-angle piece 4 is installed at the driving end of each cylinder 102. The multiple right-angle pieces 4 correspond to the multiple L-shaped hollow blocks 3 and form corresponding constraint spaces. The right-angle pieces 4 are driven by the cylinders 102 to move closer to or further away from the L-shaped hollow blocks 3 to adjust the size of the constraint space.

[0051] An air blowing hole 31 is provided on the inner side of the L-shaped hollow block 3. A pneumatic striking component 5 for striking aluminum profiles is installed on the L-shaped hollow block 3. An air supply component 6 is connected to the L-shaped hollow block 3 and the pneumatic striking component 5 respectively. When the air supply component 6 delivers gas to the L-shaped hollow block 3 and the pneumatic striking component 5, part of the gas is discharged through the air blowing hole 31, and the other part of the gas pushes the pneumatic striking component 5 to strike the aluminum profile.

[0052] The workbench 1 is equipped with welding parts 2 for welding aluminum profiles;

[0053] The welding method for aluminum profile doors and windows using welding equipment includes the following steps:

[0054] Step 1: Place multiple aluminum profiles along the inner edges of multiple L-shaped hollow blocks 3 to form a rectangular aluminum profile door and window frame;

[0055] Step 2: The cylinders 102 around the loading block 101 drive multiple right-angle pieces 4 to approach multiple L-shaped hollow blocks 3, adjust the size of the constraint space between the right-angle pieces 4 and the L-shaped hollow blocks 3, and press the right-angle pieces 4 against the inside of the aluminum profile door and window frame so that the four corners of the aluminum profile door and window frame are placed in the corresponding constraint space, thus completing the overall positioning of the aluminum profile door and window frame.

[0056] Step 3: The gas supply component 6 heats the protective gas and delivers it into the L-shaped hollow block 3. The protective gas entering the L-shaped hollow block 3 is discharged through the air blowing hole 31 to preheat the corner welding of the aluminum profile door and window frame in the confined space and form a protective gas around it.

[0057] Step 4: When welding the aluminum profile door and window frame, turn off the function of heating the protective gas in the gas supply component 6, and then weld the four corners of the aluminum profile door and window frame in sequence through the welding parts 2.

[0058] Step 5: When welding the four corner joints of the aluminum profile door and window frame, the gas supply component 6 delivers a portion of the gas to the pneumatic hammer 5, which pushes the pneumatic hammer 5 to hammer the aluminum profile door and window frame to eliminate the stress during welding.

[0059] During operation, multiple aluminum profiles are placed on the workbench 1, aligning them along the inner edges of multiple L-shaped hollow blocks 3 to form a rectangular frame. Then, cylinders 102 around the loading block 101 drive multiple right-angle pieces 4 towards the L-shaped hollow blocks 3, adjusting the constraint space between the right-angle pieces 4 and the L-shaped hollow blocks 3. The right-angle pieces 4 press firmly against the inner side of the aluminum profile frame, preventing the concentrated force from causing surface depressions in the profiles, as is common with traditional pressure blocks. Simultaneously, they constrain the corner positions to prevent welding misalignment, ensuring the regularity of the rectangular frame. Before welding, the air supply assembly 6 heats the gas and delivers it into the L-shaped hollow blocks 3, then forces the gas through the air vents on their inner sides. 31 discharges heat the welded edges of the aluminum profile frame within the confined space, serving as a preheating function to effectively reduce thermal stress during subsequent welding and form a protective gas around it. When blowing the protective gas into the confined space, it can also remove dust from the welded edges of the aluminum profile door and window frame, ensuring the quality of the welding. When welding the edges of the aluminum profile door and window frame, the heating function of the protective gas in the gas supply component 6 is turned off. Then, the four corners of the aluminum profile door and window frame are welded sequentially through the welding component 2. This device improves the welding and assembly quality of the aluminum profile door and window frame through overall positioning, preheating, cleaning and protection, and stress relief by tapping.

[0060] It should be noted that during welding, after the first strike achieves vibration, the protective gas entering the pneumatic striking component 5 can maintain its tightness against the aluminum profile. Then, the air supply component 6 is shut off from the air path to the pneumatic striking component 5, retaining the gas inside the pneumatic striking component 5. This allows the pneumatic striking component 5 to continuously press against the aluminum profile, further forming an internal and external mating structure with the right-angle component 4. This maintains the stability of the aluminum profile door and window frame during welding. After the welding component 2 completes the welding of the four corners of the aluminum profile door and window frame, the cylinder 102 drives the right-angle component 4 away from the L-shaped hollow block 3, releasing the positioning of the aluminum profile door and window frame. The aluminum alloy door and window frame can then be removed. The above design, by switching the air path, transforms the pneumatic striking component 5, originally used for striking, into an auxiliary clamp, forming an internal and external clamping force with the outer right-angle component 4. This enhances the stability of the aluminum profile door and window frame under high welding temperatures, prevents it from shifting during welding, and further ensures the quality of the door and window frame welding.

[0061] It should be further noted that when initially blowing protective gas at the four corners of the aluminum profile frame, an air pump can be installed on the outside. The air pump is connected to an air extraction pipe. The air extraction pipe can be placed close to the corners of the frame to extract the dust generated during the blowing. After the dust removal is completed, the air extraction pipe can be removed.

[0062] It should be noted that the air vent 31 on the L-shaped hollow block 3 is located near its upper part and will not be blocked by the aluminum profile, so that the protective gas can be blown out to blow air to the corner joint of the aluminum profile frame.

[0063] In this embodiment, the right-angle component 4 includes a right-angle block 41. Each cylinder 102 has a right-angle block 41 installed at its drive end. A constraint space is formed between the right-angle block 41 and the L-shaped hollow block 3. Multiple spaced loading holes are provided on the outer side of the right-angle block 41. Each loading hole has an elastic top 42 for pressing against the aluminum profile.

[0064] When positioning the aluminum profile, the cylinder 102 drives the right-angle block 41 to move closer to or further away from the L-shaped hollow block 3, so that the constraint space formed between the right-angle block 41 and the L-shaped hollow block 3 matches the corner size of the aluminum profile. After the corner of the aluminum profile frame is placed in this constraint space, the elastic top 42 in the loading hole on the outside of the right-angle block 41 directly contacts the inner surface of the aluminum profile. The elastic properties of the elastic top 42 are used to press and fix the aluminum profile. The elastic top 42 replaces the direct contact of the traditional hard pressure block, avoiding hard pressure damage to the surface of the aluminum profile. At the same time, the multiple spaced elastic tops 42 achieve distributed pressing, making the aluminum profile more uniformly stressed and further improving the positioning stability.

[0065] In this embodiment, the elastic top 42 includes a first spring 421 and a dome head 422. Each loading hole is equipped with a first spring 421, and the end of the first spring 421 is connected to a dome head 422 extending out of the loading hole. When the right-angle block 41 approaches the L-shaped hollow block 3, the dome head 422 first contacts the inner side of the aluminum profile. As the cylinder 102 continues to advance, the first spring 421 is compressed by the reaction force of the dome head 422, generating a reverse elastic thrust. The dome head 422 continuously acts on the surface of the aluminum profile. The elastic buffering effect of the first spring 421 effectively avoids the surface depression and deformation of the aluminum profile caused by rigid contact.

[0066] It should be noted that in actual operation, rubber can be wrapped around the outer periphery of the dome head 422 to prevent the dome head 422 from causing hard impact on the aluminum profile.

[0067] In this embodiment, the pneumatic striking component 5 includes a loading tube 51, an L-shaped tube 52, and an elastic striking part 53. Two loading tubes 51 are installed at the bottom inside the L-shaped hollow block 3. The two ends of the loading tube 51 pass through the two sides of the L-shaped hollow block 3 respectively. One end of the loading tube 51 is connected to a first air inlet tube 511. The L-shaped tube 52 is connected to the two first air inlet tubes 511. The air supply component 6 is connected to the L-shaped tube 52. A vent valve 512 is installed on the first air inlet tube 511. A striking port is opened at the other end of the loading tube 51. An elastic striking part 53 is installed inside the loading tube 51.

[0068] When welding the corner joints of the aluminum profile frame using welding component 2, the gas supply component 6 can deliver a portion of the protective gas into the L-shaped pipe 52. After being diverted through the L-shaped pipe 52, the protective gas enters the loading pipe 51 through the first air inlet pipe 511, pushing the elastic striking part 53 in the loading pipe 51 towards the striking port, thus striking the aluminum profile. The vent valve 512 on the first air inlet pipe 511 can be opened after the striking is completed to discharge the gas in the loading pipe 51, thereby resetting the elastic striking part 53 and achieving intermittent striking.

[0069] It should be noted that during welding, after the initial tapping achieves vibration, the gas entering the loading pipe 51 maintains the elastic tapping part 53's pressure against the aluminum profile. Then, the gas supply assembly 6 shuts off the gas path to the L-shaped pipe 52, trapping the protective gas within the loading pipe 51. This allows the elastic tapping part 53 within the loading pipe 51 to continuously press against the aluminum profile, further forming an internal and external mating structure with the right-angle piece 4. This maintains the stability of the aluminum profile door and window frame during welding. The welding piece 2 then secures the four corners of the aluminum profile door and window frame. After welding is completed, cylinder 102 drives the right-angle piece 4 away from the L-shaped hollow block 3, releasing the positioning of the aluminum profile door and window frame, so that the aluminum alloy door and window frame can be taken out. The above design, by switching the air circuit, transforms the pneumatic striking piece 5, which was originally used for striking, into an auxiliary clamp. Its elastic striking part 53 continuously presses against the aluminum profile during the welding process, forming an internal and external clamping force with the outer right-angle piece 4, which enhances the stability of the aluminum profile door and window frame under the high temperature of welding, prevents it from shifting during welding, and further ensures the quality of door and window frame welding.

[0070] In this embodiment, the elastic striking part 53 includes a second spring 531, which is installed in the loading tube 51. A piston 532 is connected to one end of the second spring 531 near the striking port, and a striking rod 533 is fixed to one side of the piston 532 near the striking port.

[0071] When gas enters the loading pipe 51 from the first air inlet pipe 511, the gas pressure acts on the piston 532, pushing the piston 532 to stretch the second spring 531 and drive the striking rod 533 to extend towards the striking port. The striking rod 533 strikes the aluminum profile. When the vent valve 512 is opened, the gas pressure in the loading pipe 51 decreases, and the elastic restoring force of the second spring 531 drives the piston 532 to reset. The piston 532 then drives the striking rod 533 to retract into the loading pipe 51.

[0072] In this embodiment, the air supply assembly 6 includes a rectangular tube 61 and a heating diverter 62. The rectangular tube 61 is disposed on the top surface of the workbench 1 and arranged around multiple L-shaped hollow blocks 3. Multiple heating diverters 62 are connected to the inner side of the rectangular tube 61. The multiple heating diverters 62 are respectively connected to multiple L-shaped hollow blocks 3 and multiple L-shaped tubes 52. A second air inlet pipe 611 is connected to the outer periphery of the rectangular tube 61.

[0073] The protective gas delivered by the external air pump enters the rectangular tube 61 through the second air inlet pipe 611. The rectangular tube 61 evenly distributes the protective gas to multiple heating and diverting components 62. The heating and diverting components 62 deliver the protective gas to the corresponding L-shaped hollow block 3 and L-shaped tube 52 respectively, thereby achieving unified air supply to the L-shaped hollow block 3 and the pneumatic striking component 5.

[0074] It should be noted that: before welding the aluminum profile frame, when welding the corners of the aluminum profile frame, the heating diverter 62 heats and delivers the protective gas to the L-shaped hollow block 3. The heated protective gas does not enter the L-shaped tube 52 at this time, and the heating function of the protective gas is turned off when welding the corners of the aluminum profile frame.

[0075] In this embodiment, the heating diversion component 62 includes a first air guide pipe 621. Multiple first air guide pipes 621 are connected to the inner side of the rectangular tube 61. One end of the first air guide pipe 621 is connected to an air passage cylinder 622. An outer cylinder 623 is fixed to the outer periphery of the air passage cylinder 622. A heating chamber is formed between the air passage cylinder 622 and the outer cylinder 623. A spiral heating wire 624 fitted on the air passage cylinder 622 is provided in the heating chamber. One end of the air passage cylinder 622 is connected to a second air guide pipe 625. One end of the second air guide pipe 625 is connected to a U-shaped pipe 626. The two ends of the multiple U-shaped pipes 626 are respectively connected to multiple L-shaped hollow blocks 3 and multiple L-shaped pipes 52. A first valve 6261 and a second valve 6262 are respectively installed at the two ends of the U-shaped pipes 626.

[0076] Before welding, when the corner joints of the aluminum profile frame need to be preheated, the protective gas in the rectangular tube 61 enters the air cylinder 622 through the first air guide tube 621. The spiral heating wire 624 in the heating chamber between the air cylinder 622 and the outer cylinder 623 generates heat after being energized, which heats the protective gas in the air cylinder 622. The heated protective gas enters the U-shaped tube 626 through the second air guide tube 625. By controlling the opening and closing of the first valve 6261 and the second valve 6262 at both ends of the U-shaped tube 626, the first valve 6261 is in the open state and the second valve 6262 is in the closed state, so that the heated protective gas is delivered to the L-shaped hollow block 3, and the heated protective gas can be discharged from the blowing hole 31 on the inner side of the L-shaped hollow block 3.

[0077] During welding, the heating function of the spiral heating wire 624 is turned off, and the second valve 6262 is opened, allowing protective gas to enter the L-shaped tube 52, thereby enabling the pneumatic striking component 5 to strike the aluminum profile.

[0078] During welding, after a single tap to achieve vibration, the gas entering the loading pipe 51 keeps the elastic tapping part 53 pressed against the aluminum profile. Then, the second valve 6262 on the U-shaped pipe 626 is closed, trapping the protective gas inside the loading pipe 51. This allows the elastic tapping part 53 inside the loading pipe 51 to continuously press against the aluminum profile, further forming an internal and external mating structure with the right-angle piece 4, maintaining the stability of the aluminum profile door and window frame during welding.

[0079] In this embodiment, the end of the second air inlet pipe 611 away from the rectangular tube 61 is used to connect to the air pump for supplying protective gas. The external air pump, as a power source, pressurizes the protective gas for welding and continuously delivers it to the rectangular tube 61 through the second air inlet pipe 611, providing a continuous gas supply for the entire gas supply assembly 6 and the subsequent L-shaped hollow block 3 and pneumatic striking component 5. The pressure of the air pump can be adjusted according to the welding requirements to achieve control of the gas supply volume and pressure.

[0080] In this embodiment, the welding component 2 includes a rectangular guide rail 21 and a welding robot 22. The rectangular guide rail 21 is installed on the top surface of the workbench 1. The welding robot 22 is installed on the drive end of the rectangular guide rail 21. The welding torch 23 for welding aluminum profiles is installed on the free end of the welding robot 22.

[0081] During welding, the drive end of the rectangular guide rail 21 can drive the welding robot 22 to move around the aluminum profile door and window frame, and the welding gun 23 at the free end of the welding robot 22 can weld the joints of the aluminum profile frame.

[0082] It should be noted that in actual use, the welding robot 22 is also equipped with a nozzle for spraying protective gas to further improve the quality of welding.

[0083] In specific embodiments, the protective gas includes, but is not limited to, argon and nitrogen.

[0084] A welding method for aluminum profile doors and windows, employing the aforementioned welding device for aluminum profile doors and windows, includes the following steps:

[0085] Step 1: Place multiple aluminum profiles along the inner edges of multiple L-shaped hollow blocks 3 to form a rectangular aluminum profile door and window frame;

[0086] Step 2: The cylinders 102 around the loading block 101 drive multiple right-angle pieces 4 to approach multiple L-shaped hollow blocks 3, adjust the size of the constraint space between the right-angle pieces 4 and the L-shaped hollow blocks 3, and press the right-angle pieces 4 against the inside of the aluminum profile door and window frame so that the four corners of the aluminum profile door and window frame are placed in the corresponding constraint space, thus completing the overall positioning of the aluminum profile door and window frame.

[0087] Step 3: The gas supply component 6 heats the protective gas and delivers it into the L-shaped hollow block 3. The protective gas entering the L-shaped hollow block 3 is discharged through the air blowing hole 31 to preheat the corner welding of the aluminum profile door and window frame in the confined space and form a protective gas around it.

[0088] Step 4: When welding the aluminum profile door and window frame, turn off the function of heating the protective gas in the gas supply component 6, and then weld the four corners of the aluminum profile door and window frame in sequence through the welding parts 2.

[0089] Step 5: When welding the four corner joints of the aluminum profile door and window frame, the gas supply component 6 delivers a portion of the gas to the pneumatic hammer 5, which pushes the pneumatic hammer 5 to hammer the aluminum profile door and window frame to eliminate the stress during welding.

[0090] Step 6: After welding is completed, cylinder 102 drives the right-angle piece 4 away from the L-shaped hollow block 3, releasing the positioning of the aluminum profile door and window frame, and the aluminum profile door and window frame can then be removed.

[0091] The specific working principle of this invention is as follows:

[0092] Multiple aluminum profiles are placed along the inner edges of multiple L-shaped hollow blocks 3 arranged in a rectangle on the workbench 1 to form a rectangular door and window frame. The four corners of the frame are respectively attached to the inner sides of multiple L-shaped hollow blocks 3. Then, the cylinders 102 around the loading block 101 in the middle of the workbench 1 are activated. The driving end of the cylinder 102 drives the right-angle block 41 of the right-angle piece 4 to approach the corresponding L-shaped hollow block 3 until the elastic top 42 on the right-angle block 41 contacts the inner side of the aluminum profile frame. This restricts the corners of the aluminum profile within the constraint space formed by the right-angle block 41 and the L-shaped hollow block 3, completing the overall positioning of the aluminum profile frame and adapting to the size requirements of different frame specifications.

[0093] External protective gas is delivered to the second air inlet pipe 611 via an air pump. The second air inlet pipe 611 delivers the protective gas to the rectangular pipe 61. The rectangular pipe 61 divides the gas into the first air guide pipes 621 of each heating and diverting component 62. After the gas enters the air passage cylinder 622, the spiral heating wire 624 in the heating chamber is energized and heated to heat the protective gas in the air passage cylinder 622. The first valve 6261 on the U-shaped pipe 626 is opened and the second valve 6262 is closed. The heated protective gas enters the L-shaped hollow block 3 through the second air guide pipe 625 and the U-shaped pipe 626, and finally exits from the blowing hole 31 on the inner side of the L-shaped hollow block 3. On the one hand, the aluminum profile corner welding area is preheated to reduce the thermal stress of subsequent welding. On the other hand, the airflow blows away the dust and impurities in the welding area and forms a protective gas atmosphere around the welding area to prevent the weld from being oxidized during subsequent welding.

[0094] The heating function of the spiral heating wire 624 in the heating distributor 62 is turned off. The rectangular guide rail 21 drives the welding robot 22 to move along the rectangular direction of the worktable 1. The welding robot 22 adjusts the position and angle of the welding torch 23 through multi-degree-of-freedom rotation, so that the welding torch 23 is aligned with the corner welding seam of the aluminum profile frame, and welding operations are performed in sequence. At the same time as welding, the second valve 6262 on the U-shaped tube 626 is opened. Part of the protective gas of the gas supply component 6 enters the L-shaped tube 52 of the pneumatic striking component 5 through the U-shaped tube 626, and then enters the loading tube 51 through the first air inlet tube 511. The gas pressure pushes the piston 532 in the loading tube 51 to stretch the second spring 531, and drives the striking rod 533 to extend out of the striking port to strike the aluminum profile being welded. The material is subjected to hammering vibration. After the hammering is completed, the vent valve 512 on the first air inlet pipe 511 is opened, and the gas in the loading pipe 51 is discharged. The second spring 531 elastically resets, driving the piston 532 and the hammering rod 533 to retract. After closing the vent valve 512, the above action is repeated to achieve intermittent hammering. The residual stress generated during the welding process is eliminated by vibration, while reducing the porosity and looseness inside the aluminum profile and improving the density of the weld. If it is necessary to enhance the positioning stability during welding, the second valve 6262 can be closed after a single hammering to maintain the air pressure in the loading pipe 51 and allow the hammering rod 533 to continuously press against the aluminum profile to form an auxiliary clamp. This clamping structure, which is formed with the right-angle piece 4, maintains the stability of the aluminum profile during welding.

[0095] After the welding of the four corner joints of the aluminum profile frame is completed, the cylinder 102 drives the right-angle piece 4 away from the L-shaped hollow block 3, the elastic top 42 releases its pressure on the aluminum profile frame, the constraint space opens, and finally the welded aluminum alloy door and window frame is taken directly from the workbench 1, completing the entire welding process.

[0096] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A welding device for aluminum profile doors and windows, characterized in that, Includes a workbench (1) and an air supply assembly (6); The top surface of the workbench (1) is equipped with multiple L-shaped hollow blocks (3) arranged in a rectangular shape. A loading block (101) is installed in the middle of the top surface of the workbench (1). Cylinders (102) are installed around the loading block (101). A right-angle piece (4) is installed at the driving end of each cylinder (102). Multiple right-angle pieces (4) correspond to multiple L-shaped hollow blocks (3) respectively and form corresponding constraint spaces. The right-angle pieces (4) are driven by the cylinders (102) to move closer to or away from the L-shaped hollow blocks (3) to adjust the size of the constraint space. The L-shaped hollow block (3) has an air blowing hole (31) on its inner side. A pneumatic striking component (5) for striking aluminum profiles is installed on the L-shaped hollow block (3). The air supply component (6) is connected to the L-shaped hollow block (3) and the pneumatic striking component (5) respectively. When the air supply component (6) delivers gas to the L-shaped hollow block (3) and the pneumatic striking component (5), part of the gas is discharged through the air blowing hole (31), and the other part of the gas pushes the pneumatic striking component (5) to strike the aluminum profile. The workbench (1) is equipped with a welding component (2) for welding aluminum profiles; The welding method of the aluminum profile door and window welding device includes the following steps: Step 1: Place multiple aluminum profiles along the inner edges of multiple L-shaped hollow blocks (3) to form a rectangular aluminum profile door and window frame; Step 2: The cylinders (102) around the loading block (101) drive multiple right-angle pieces (4) to approach multiple L-shaped hollow blocks (3), adjust the size of the constraint space between the right-angle pieces (4) and the L-shaped hollow blocks (3), and press the right-angle pieces (4) against the inside of the aluminum profile door and window frame so that the four corners of the aluminum profile door and window frame are placed in the corresponding constraint space, thus completing the overall positioning of the aluminum profile door and window frame; Step 3: The gas supply component (6) heats the protective gas and delivers it into the L-shaped hollow block (3). The protective gas entering the L-shaped hollow block (3) is discharged through the air blowing hole (31) to preheat the corner welding of the aluminum profile door and window frame in the constrained space and form a protective gas around it. Step 4: When welding the aluminum profile door and window frame, turn off the function of heating the protective gas in the gas supply component (6), and then weld the four corners of the aluminum profile door and window frame in sequence through the welding parts (2); Step 5: When welding the four corners of the aluminum profile door and window frame, the gas supply component (6) delivers a portion of the gas to the pneumatic hammer (5) to push the pneumatic hammer (5) to hammer the aluminum profile door and window frame to eliminate the stress during welding.

2. The welding device for aluminum profile doors and windows according to claim 1, characterized in that, The right-angle component (4) includes a right-angle block (41). Each cylinder (102) has a right-angle block (41) installed at its drive end. A constraint space is formed between the right-angle block (41) and the L-shaped hollow block (3). Multiple spaced loading holes are provided on the outer side of the right-angle block (41). Each loading hole has an elastic top (42) installed to press against the aluminum profile.

3. The welding device for aluminum profile doors and windows according to claim 2, characterized in that, The elastic top (42) includes a first spring (421) and a dome head (422). The first spring (421) is installed in each loading hole, and the end of the first spring (421) is connected to a dome head (422) extending out of the loading hole.

4. The welding device for aluminum profile doors and windows according to claim 1, characterized in that, The pneumatic striking component (5) includes a loading tube (51), an L-shaped tube (52), and an elastic striking part (53). Two loading tubes (51) are installed at the bottom of the L-shaped hollow block (3). The two ends of the loading tubes (51) pass through the two sides of the L-shaped hollow block (3). One end of the loading tube (51) is connected to a first air inlet pipe (511). The L-shaped tube (52) is connected to the two first air inlet pipes (511). The air supply component (6) is connected to the L-shaped tube (52). A vent valve (512) is installed on the first air inlet pipe (511). A striking port is opened at the other end of the loading tube (51). An elastic striking part (53) is installed inside the loading tube (51).

5. The welding device for aluminum profile doors and windows according to claim 4, characterized in that, The elastic striking part (53) includes a second spring (531), which is installed inside the loading tube (51). A piston (532) is connected to one end of the second spring (531) near the striking port. A striking rod (533) is fixed to one side of the piston (532) near the striking port.

6. The welding device for aluminum profile doors and windows according to claim 4, characterized in that, The air supply assembly (6) includes a rectangular tube (61) and a heating diverter (62). The rectangular tube (61) is set on the top surface of the workbench (1) and arranged around multiple L-shaped hollow blocks (3). Multiple heating diverters (62) are connected to the inner side of the rectangular tube (61). The multiple heating diverters (62) are respectively connected to multiple L-shaped hollow blocks (3) and multiple L-shaped tubes (52). A second air inlet pipe (611) is connected to the outer periphery of the rectangular tube (61).

7. The welding device for aluminum profile doors and windows according to claim 6, characterized in that, The heating diversion component (62) includes a first air guide pipe (621). Multiple first air guide pipes (621) are connected to the inner side of the rectangular tube (61). One end of the first air guide pipe (621) is connected to an air passage cylinder (622). An outer cylinder (623) is fixed to the outer periphery of the air passage cylinder (622). A heating chamber is formed between the air passage cylinder (622) and the outer cylinder (623). A spiral heating wire (624) fitted on the air passage cylinder (622) is provided in the heating chamber. One end of the air passage cylinder (622) is connected to a second air guide pipe (625). One end of the second air guide pipe (625) is connected to a U-shaped pipe (626). The two ends of the multiple U-shaped pipes (626) are respectively connected to multiple L-shaped hollow blocks (3) and multiple L-shaped pipes (52). A first valve (6261) and a second valve (6262) are respectively installed at the two ends of the U-shaped pipes (626).

8. The welding device for aluminum profile doors and windows according to claim 6, characterized in that, The end of the second air inlet pipe (611) away from the rectangular pipe (61) is used to connect to an air pump that supplies protective gas.

9. The welding device for aluminum profile doors and windows according to claim 1, characterized in that, The welded part (2) includes a rectangular guide rail (21) and a welding robot (22). The rectangular guide rail (21) is installed on the top surface of the workbench (1). The welding robot (22) is installed at the drive end of the rectangular guide rail (21). The welding gun (23) for welding aluminum profiles is installed at the free end of the welding robot (22).

10. A welding method for aluminum profile doors and windows, employing a welding apparatus for aluminum profile doors and windows as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Place multiple aluminum profiles along the inner edges of multiple L-shaped hollow blocks (3) to form a rectangular aluminum profile door and window frame; Step 2: The cylinders (102) around the loading block (101) drive multiple right-angle pieces (4) to approach multiple L-shaped hollow blocks (3), adjust the size of the constraint space between the right-angle pieces (4) and the L-shaped hollow blocks (3), and press the right-angle pieces (4) against the inside of the aluminum profile door and window frame so that the four corners of the aluminum profile door and window frame are placed in the corresponding constraint space, thus completing the overall positioning of the aluminum profile door and window frame; Step 3: The gas supply component (6) heats the protective gas and delivers it into the L-shaped hollow block (3). The protective gas entering the L-shaped hollow block (3) is discharged through the air blowing hole (31) to preheat the corner welding of the aluminum profile door and window frame in the constrained space and form a protective gas around it. Step 4: When welding the aluminum profile door and window frame, turn off the function of heating the protective gas in the gas supply component (6), and then weld the four corners of the aluminum profile door and window frame in sequence through the welding parts (2); Step 5: When welding the four corners of the aluminum profile door and window frame, the gas supply component (6) delivers a portion of the gas to the pneumatic hammer (5) to push the pneumatic hammer (5) to hammer the aluminum profile door and window frame to eliminate the stress during welding. Step 6: After welding is completed, the cylinder (102) drives the right-angle piece (4) away from the L-shaped hollow block (3) to release the positioning of the aluminum profile door and window frame, and then the aluminum profile door and window frame can be taken out.

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