Welding process of liquid cooling heat dissipation aluminum part

Abstract

The invention discloses a welding process of a liquid cooling heat dissipation aluminum part, and relates to the technical field of aluminum part welding, and the welding process comprises the steps that protective gas is guided into a vacuum furnace through a blowing structure, the welded aluminum part is cleaned, and the protective gas and cleaned impurities are discharged from the vacuum furnace through an exhaust structure; the discharged protective gas and impurities are guided into a filtering box to be treated, and the protective gas after impurity filtering is guided into the filtering box to be treated and collected for recycling; the filtered impurities are collected through a collecting structure, and the welded aluminum part is loaded and unloaded; gas generated by welding is exhausted through cooperation of the gas guide ring, the gas blowing pipe, the adjusting base, the gas blowing spray head, the exhaust hood, the main exhaust pipe, the adapter, the gas suction hood and the secondary exhaust pipe, influences on the aluminum parts are avoided, protective gas is filtered through the exhaust structure and then recycled, and the machining yield of the liquid cooling heat dissipation aluminum parts is increased.

Description

Technical Field

[0001] This invention belongs to the field of aluminum component welding technology, specifically a welding process for liquid-cooled heat dissipation aluminum components. Background Technology

[0002] Aluminum components are industrial or consumer goods made primarily of aluminum or aluminum alloys through processes such as casting, extrusion, rolling, and welding. They possess characteristics such as lightweight, corrosion resistance, and high strength, and are widely used in construction, transportation, electronics, aerospace, and other fields. Liquid-cooled heat dissipation aluminum components are high-efficiency heat dissipation devices made with aluminum alloys as the core material and precision machining processes. Their core function is to absorb and transfer the heat generated during equipment operation through an internally circulating coolant, achieving precise and efficient temperature control. As a key component of modern thermal management systems, they are widely used in high-power, high-density electronic equipment and new energy fields, and are an important solution for solving equipment overheating problems and improving operational stability. The processing of liquid-cooled heat dissipation aluminum components requires welding equipment; therefore, a welding process for liquid-cooled heat dissipation aluminum components is needed.

[0003] Existing welding processes for liquid-cooled aluminum components, when used in long-term mass production, result in residual brazing spatter and oxide scale debris on the inner wall of the vacuum furnace cavity and the surface of the fixtures. These impurities absorb moisture and oil from the air. After each furnace loading and closing, gases released from these impurities enter the furnace during the welding process. Some of these gases are captured by the flow channels and weld gaps of the aluminum components. The residual gases inside the flow channels and weld gaps of the liquid-cooled aluminum components cause porosity defects, thereby reducing the yield rate of the liquid-cooled aluminum components and the welding effect of the welding process, failing to meet people's needs. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art; to this end, the present invention proposes a welding process for liquid-cooled heat dissipation aluminum parts.

[0005] A welding process for a liquid-cooled heat dissipation aluminum component includes the following steps: S1. Pre-treat the aluminum parts before welding, load them into the vacuum furnace, and evacuate the vacuum furnace. S2. The aluminum parts are heated uniformly to melt and diffuse the brazing filler metal, and then vacuum welded. S3. The protective gas is introduced into the vacuum furnace through the blowing structure and the aluminum parts after welding are cleaned. The exhaust structure discharges the protective gas and the cleaned impurities from the vacuum furnace. S4. The discharged protective gas and impurities are introduced into the filter box for treatment, and the protective gas after filtering the impurities is introduced into the treatment and collection for recycling. S5. Collect the filtered impurities through the collection structure and load and unload the welded aluminum parts.

[0006] In step S1, the core of this step is to remove impurities such as oil and oxide film from the surface of the aluminum parts, and at the same time, to properly assemble the brazing filler metal and fixtures to avoid affecting the wetting and filling effect of the brazing filler metal during brazing. Degreasing treatment: Immerse the aluminum parts in acetone or ethanol solution and clean them with ultrasonic cleaner for 10-15 minutes to thoroughly remove surface processing oil and fingerprint oil. If the oil is heavy, it can also be soaked in a weak alkaline cleaning agent first and then cleaned with ultrasonic cleaner, and finally rinsed with deionized water.

[0007] Pretreatment includes oxide film removal, drying, and brazing assembly. Pretreated aluminum parts must be processed within 12 hours to prevent oxide film re-formation. Furnace loading must ensure uniform heating of the aluminum parts and good furnace sealing. Specific steps are as follows: First, check the vacuum furnace cavity for cleanliness, removing any residual impurities or brazing debris to avoid contaminating the aluminum parts. Then, carefully place the aluminum parts assembly, secured with brazing filler and clamps, into the effective heating zone of the furnace. A gap of ≥10mm must be maintained between aluminum parts, and the amount loaded at one time should not exceed 80% of the effective furnace volume to prevent uneven heating.

[0008] In step S2, after completing the vacuuming operation, the liquid-cooled aluminum component is uniformly heated to achieve the melting and diffusion of the brazing filler metal and complete vacuum welding. This process must be carried out step by step, including preheating and degassing, precise temperature rise, heat preservation brazing, and controlled cooling. Preheating and degassing prevents deformation of the aluminum component due to thermal stress during subsequent high-temperature heating and completely removes residual gases. The temperature is increased to 400-500℃ at a rate of ≤8℃ / min, and then held for 30-60 minutes. At this temperature, the water vapor and residual cleaning agent vapor adsorbed inside the aluminum component will be fully released, and the brazing filler metal will not melt prematurely. The temperature is then precisely increased to the brazing temperature. After preheating, the heating rate is adjusted to ≤10℃ / min and the heating continues. The temperature must be strictly controlled above the liquidus line of the aluminum-based brazing filler metal by 20℃. At -50℃, during the heating process, the uniform heating elements distributed throughout the furnace, combined with the previously reasonable furnace loading method, ensure uniform heating. The holding period allows for the melting and diffusion of the brazing filler metal. Once the aluminum part reaches the set brazing temperature, it enters the holding period, which is the core of the brazing filler metal melting, diffusion, and welding formation. The holding time is generally set to 1-2 hours. During the holding period, the aluminum-based brazing filler metal completely melts, filling the gaps in the brazing seam through capillary action. Simultaneously, the molten filler metal and the aluminum base material mutually dissolve and diffuse, forming a strong metallurgical bond layer. Controlled cooling completes the welding and solidification. After the holding period, rapid cooling is not allowed, otherwise thermal stress may occur, leading to deformation and cracking of the aluminum part. First, turn off the heating power and allow the aluminum part to cool naturally in a vacuum environment, with the cooling rate controlled at ≤5℃ / min.

[0009] As a further aspect of the present invention: In step S3, when the temperature drops below 450°C, the blowing structure introduces high-purity argon and other protective gases into the furnace to clean the aluminum parts, while simultaneously activating the exhaust structure to accelerate cooling, thereby improving efficiency and preventing air from entering the oxidized workpiece.

[0010] As a further aspect of the present invention: the inner bottom surface of the vacuum furnace is provided with a limiting platform for limiting the aluminum parts and a welding device for welding the aluminum parts, which is set on the limiting platform. The limiting platform is provided with a support frame for adjusting the height of the welding device. The support frame is provided with a screw drive structure for controlling the lifting and lowering of the welding device. The support frame is rotatably mounted on the limiting platform. The air blowing structure includes a detachable air guide ring set on the outer wall of the vacuum furnace and a plurality of air blowing pipes arranged in a circular array on the inner side of the vacuum furnace. One end of each air blowing pipe is connected to the air guide ring. The other end of the air blowing pipe is provided with an adjustment seat. The inner side of the adjustment seat is rotatably provided with an air blowing nozzle that communicates with the air blowing pipe. The air blowing nozzle can adjust the blowing angle on the adjustment seat. The air blowing nozzle can blow air onto the aluminum parts on the limiting platform. The outer side of the vacuum furnace is provided with a gas storage box for storing protective gas. The gas storage box is provided with a gas supply pump. The inside of the gas storage box is provided with several gas storage tanks that communicate with the gas supply pump. The gas supply pump introduces the protective gas into the gas guide ring through the gas guide pipe, and then evenly introduces the gas into several air blowing nozzles through the gas guide ring and the air blowing pipe.

[0011] As a further aspect of the present invention: the exhaust structure includes an exhaust hood detachably installed on the top surface of the inner side of the vacuum furnace and an exhaust main pipe disposed at the top of the vacuum furnace and communicating with the exhaust hood. The upper end of the exhaust hood is provided with a connector communicating with the exhaust main pipe. The lower middle part of the connector is provided with a suction hood extending into the exhaust hood. The lower edge of the connector is provided with a plurality of exhaust secondary pipes in a circular array that fit against the inner wall of the exhaust hood. The exhaust secondary pipes are aligned with the blowing nozzle.

[0012] As a further aspect of the present invention: In step S4, the filter box is detachably mounted on the outer wall of the vacuum furnace, the other end of the exhaust pipe is connected to the filter box, the filter box has a cylindrical filter cavity, a plurality of rotating rings are rotatably mounted in the filter box, the inner wall of the rotating rings is provided with filter elements, the end of the filter box away from the vacuum furnace is provided with an exhaust pipe, and one end of the exhaust pipe is provided with an exhaust device, so that the gas in the exhaust pipe is filtered by the filter elements and then discharged and collected through the exhaust pipe.

[0013] As a further embodiment of the present invention: one side of the filter element is flush with one side of the rotating ring, a scraper that fits against the filter element is vertically provided in the filter box, a protective box that fits against the rotating ring is provided in the filter box, a connecting ring that is coaxially connected to the rotating ring is provided in the protective box, and a drive motor that controls the rotation of the connecting ring is provided on the outer wall of the filter box.

[0014] As a further aspect of the present invention: the protective box is provided with a rotating internal gear ring coaxially connected to the connecting ring, the protective box is provided with a main gear for controlling the rotation of the rotating internal gear ring, one end of the main gear is coaxially provided with a first bevel gear structure, and the drive motor is provided with a connecting rod coaxially connected to the first bevel gear structure, so that the drive motor controls the rotation of the rotating internal gear ring through the first bevel gear structure and the main gear, thereby causing the connecting ring to control the rotation of the filter element through the rotating ring, so that the scraper cleans the filter element.

[0015] As a further aspect of the present invention: the outer wall of the rotating ring is provided with a guide ring connected to the filter box, the filter box is provided with a feed inlet matching the scraper, the feed inlet is located on the lower side of the filter box, and two arc-shaped sealing plates are movably arranged in the feed inlet. The two arc-shaped sealing plates are respectively staggered vertically in the feed inlet. The outer side of the guide ring is provided with a transmission component to control the movement of the arc-shaped sealing plates. The transmission component can continuously open or close the feed inlet as the rotating ring rotates, so as to guide the impurities in the feed inlet into the collection structure.

[0016] As a further aspect of the present invention: In step S5, the transmission assembly includes several first transmission racks arranged in a circular array on the outer wall of the guide ring and second transmission racks respectively aligned and connected to the arc-shaped sealing plate. The two second transmission racks are respectively staggered on both sides of the feed inlet. The second transmission racks are aligned with the arc-shaped sealing plate. One side of the arc-shaped sealing plate is provided with several reinforcing rods connected to the second transmission racks.

[0017] As a further aspect of the present invention: the transmission assembly further includes a first transmission gear meshing with the first transmission rack, the first transmission gear meshing with the upper second transmission rack, such that the first transmission rack controls the movement of the second transmission rack through the first transmission gear, thereby controlling the movement of the upper arc-shaped sealing plate; As a further aspect of the present invention: the transmission assembly further includes a second transmission gear meshing with the first transmission gear, the second transmission gear meshing with the second transmission rack below, so that the first transmission rack rotates through the first transmission gear and the second transmission gear, thereby causing the second transmission rack to control the movement of the arc-shaped sealing plate below; the filter box is provided with an arc-shaped guide rod that is guided and connected to the second transmission rack, and a return spring connected to the second transmission rack is sleeved on the arc-shaped guide rod.

[0018] As a further aspect of the present invention: the collection structure includes a first collection box fitted to the lower side of the filter box and communicating with the feed inlet, and a second collection box detachably fixed to the bottom of the first collection box. The lower side of the filter box is symmetrically provided with mounting seats that fit against the first collection box. The first collection box is provided with a mounting strip detachably connected to the mounting seat. The upper end of the first collection box has a first feed inlet matching the feed inlet. The interior of the first collection box has a discharge trough with a circular funnel structure. The bottom end of the first collection box has a discharge port communicating with the discharge trough. The first collection box is detachably provided with a scraper for cleaning the discharge trough. The scraper is provided with a rotating rod, the upper end of which penetrates the filter box and extends into the protective box. The protective box is provided with a second bevel gear structure coaxially connected to the rotating rod. The second bevel gear structure is provided with a driven gear meshing with a rotating internal gear ring, so that when the rotating ring rotates, the driven gear and the second bevel gear structure cooperate to control the scraper to clean the discharge trough.

[0019] As a further aspect of the present invention: the second collection box has a second inlet that is aligned with the discharge port; the upper middle part of the second collection box has a symmetrically arranged limiting strip that is inserted into the first collection box; the first collection box has a limiting groove that matches the limiting strip; the first collection box has a limiting gear that is rotatably connected to the limiting strip; the limiting strip has a limiting rack that meshes with the limiting gear; and the limiting strip has a first groove that matches the limiting rack.

[0020] As a further aspect of the present invention: the first collection box is provided with a third bevel gear structure coaxially connected to the limiting gear, and a moving gear is coaxially provided on one side of the third bevel gear structure. The first collection box is symmetrically provided with a blocking block that is connected to the moving gear and blocks the discharge port. The lower end face of the blocking block is provided with a moving rack that meshes with the moving gear, and the bottom end of the blocking block is provided with a second groove that matches the moving rack.

[0021] As a further aspect of the present invention: the upper edge of the second collection box is symmetrically provided with connecting strips, and both sides of the outer surface of the first collection box are provided with connecting grooves that connect with the connecting strips.

[0022] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention uses the blowing structure, exhaust structure, gas storage box and collection structure in combination to introduce protective gas into the vacuum furnace to effectively protect aluminum parts. The gas guide ring, blowing pipe, adjusting seat, blowing nozzle, exhaust hood, exhaust main pipe, adapter, suction hood and exhaust secondary pipe work together to clean up the exhaust structure generated by welding, so as to avoid affecting the aluminum parts. The protective gas is filtered and recycled after the exhaust structure is set up to improve the yield of liquid-cooled heat dissipation aluminum parts and improve the welding effect of the welding process.

[0023] (2) The present invention, through the filter box and collection structure, the rotating ring, filter element, scraper, protective box, connecting ring, drive motor, rotating internal gear ring, main gear and first bevel gear structure can filter impurities in the protective gas. The filtered impurities are introduced into the first collection box for collection and processing through the material guide port, arc-shaped sealing plate, first transmission rack, second transmission rack, first transmission gear and second transmission gear. This reduces the number of times the filter box will re-inhale the cleaned impurities onto the filter element, extends the service life of the filter element, reduces the labor intensity of the workers, and improves the welding effect of the welding process.

[0024] (3) The present invention, through the collection structure, scraper, rotating rod, second bevel gear structure and driven gear working together, can clean the impurities in the first collection box into the second collection box through the discharge port. The limiting strip, limiting gear, limiting rack, third bevel gear structure, moving gear, sealing block and moving rack work together to make the first collection box and the second collection box work together, which can transfer and clean the impurities in the first collection box, and make the first collection box continuously collect without interfering with the operation of the filter box and filter element, improve the use effect of the collection structure and improve the welding effect of the welding process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the welding process of the present invention.

[0026] Figure 2 This is a partial structural diagram of the blowing structure and the exhaust structure in this invention.

[0027] Figure 3 This is a cross-sectional view of the vacuum furnace in this invention.

[0028] Figure 4 This is a partial structural diagram of the exhaust structure in this invention.

[0029] Figure 5 This is a partial structural diagram of the collecting structure and filter element in this invention.

[0030] Figure 6This is a partial structural diagram of the filter element and rotating ring in this invention.

[0031] Figure 7 This is a partial structural diagram of the rotating ring and the arc-shaped sealing plate in this invention.

[0032] Figure 8 This is a partial structural diagram of the arc-shaped sealing plate and the second transmission rack in this invention.

[0033] Figure 9 This is a partial structural diagram of the first and second collection boxes in this invention.

[0034] Figure 10 This is a cross-sectional view of the first collection box and the second collection box in this invention.

[0035] Figure 11 This is a partial structural diagram of the scraper and sealing block in this invention.

[0036] Figure 12 This is a partial structural diagram of the sealing block and the limiting strip in this invention.

[0037] In the diagram: 1. Vacuum furnace; 2. Air blowing structure; 3. Exhaust structure; 4. Filter box; 5. Gas storage tank; 6. Collection structure; 7. Support frame; 8. Limiting platform; 9. Welding equipment; 10. Air guide ring; 11. Air blowing pipe; 12. Adjusting seat; 13. Air blowing nozzle; 14. Exhaust hood; 15. Main exhaust pipe; 16. Adapter; 17. Suction hood; 18. Secondary exhaust pipe; 19. Rotating ring; 20. Filter element; 21. Suction pipe; 22. Suction equipment; 23. Scraper; 24. Protective box; 25. Connecting ring; 26. Drive motor; 27. Rotating internal gear ring; 28. Main gear; 29. ​​First bevel gear structure; 30. Guide. 31. Ring; 32. Guide port; 33. Arc-shaped sealing plate; 34. First transmission rack; 35. Second transmission rack; 36. First transmission gear; 37. Second transmission gear; 38. First collection box; 39. Second collection box; 40. Mounting base; 41. Mounting strip; 42. Discharge port; 43. Scraper; 44. Rotating rod; 45. Second bevel gear structure; 46. Driven gear; 47. Limiting strip; 48. Limiting gear; 49. Third bevel gear structure; 50. Moving gear; 51. Sealing block; 52. Moving rack; 53. Connecting strip; 54. Air supply pump; 55. Air guide pipe; 56. Arc-shaped guide rod. Detailed Implementation

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1 Please see Figures 1-6 This application provides a welding process for liquid-cooled heat dissipation aluminum components, including the following steps: S1. Before welding, the aluminum parts are pretreated and placed in vacuum furnace 1 and vacuum furnace 1 is evacuated. S2. The aluminum parts are heated uniformly to melt and diffuse the brazing filler metal, and then vacuum welded. S3. The protective gas is introduced into the vacuum furnace 1 through the blowing structure 2 and the aluminum parts after welding are cleaned. The exhaust structure 3 discharges the protective gas and the cleaned impurities from the vacuum furnace 1. S4. The discharged protective gas and impurities are introduced into the filter box 4 for processing, and the protective gas after filtering the impurities is introduced into the processing and collection for recycling. S5. Collect the filtered impurities through the collection structure 6, and load and unload the welded aluminum parts.

[0040] In step S1, the core of this step is to remove impurities such as oil and oxide film from the surface of the aluminum parts, and at the same time, to properly assemble the brazing filler metal and fixtures to avoid affecting the wetting and filling effect of the brazing filler metal during brazing. Degreasing treatment: Immerse the aluminum parts in acetone or ethanol solution and clean them with ultrasonic cleaner for 10-15 minutes to thoroughly remove surface processing oil and fingerprint oil. If the oil is heavy, it can also be soaked in a weak alkaline cleaning agent first and then cleaned with ultrasonic cleaner, and finally rinsed with deionized water.

[0041] The pretreatment in this invention includes oxide film removal, drying, and brazing assembly. The pretreated aluminum parts must be processed within 12 hours to prevent oxide film from forming again. The furnace loading operation must ensure that the aluminum parts are heated evenly and that the furnace body is well sealed. The specific steps are as follows: First, check whether the inside of the vacuum furnace cavity is clean and remove any residual impurities or brazing debris to avoid contaminating the aluminum parts. Then, place the aluminum parts assembly with the brazing filler and clamps fixed in place smoothly into the effective heating zone of the furnace. A gap of ≥10mm must be maintained between the aluminum parts. The amount loaded into the furnace at one time should not exceed 80% of the effective volume of the furnace cavity to prevent uneven heating.

[0042] In step S2, after completing the vacuuming operation, the liquid-cooled aluminum component is uniformly heated to achieve the melting and diffusion of the brazing filler metal and complete vacuum welding. This process must be carried out step by step, including preheating and degassing, precise temperature rise, heat preservation brazing, and controlled cooling. Preheating and degassing prevents deformation of the aluminum component due to thermal stress during subsequent high-temperature heating and completely removes residual gases. The temperature is increased to 400-500℃ at a rate of ≤8℃ / min, and then held for 30-60 minutes. At this temperature, the water vapor and residual cleaning agent vapor adsorbed inside the aluminum component will be fully released, and the brazing filler metal will not melt prematurely. The temperature is then precisely increased to the brazing temperature. After preheating, the heating rate is adjusted to ≤10℃ / min and the heating continues. The temperature must be strictly controlled above the liquidus line of the aluminum-based brazing filler metal by 20℃. At -50℃, during the heating process, the uniform heating elements distributed throughout the furnace, combined with the previously reasonable furnace loading method, ensure uniform heating. The holding period allows for the melting and diffusion of the brazing filler metal. Once the aluminum part reaches the set brazing temperature, it enters the holding period, which is the core of the brazing filler metal melting, diffusion, and welding formation. The holding time is generally set to 1-2 hours. During the holding period, the aluminum-based brazing filler metal completely melts, filling the gaps in the brazing seam through capillary action. Simultaneously, the molten filler metal and the aluminum base material mutually dissolve and diffuse, forming a strong metallurgical bond layer. Controlled cooling completes the welding and solidification. After the holding period, rapid cooling is not allowed, otherwise thermal stress may occur, leading to deformation and cracking of the aluminum part. First, turn off the heating power and allow the aluminum part to cool naturally in a vacuum environment, with the cooling rate controlled at ≤5℃ / min.

[0043] In step S3, when the temperature drops below 450°C, the blowing structure 2 introduces high-purity argon and other protective gases into the furnace to clean the aluminum parts. At the same time, the exhaust structure 3 is activated to accelerate cooling, which can improve efficiency and prevent air from entering the oxidized workpiece.

[0044] In this invention, the inner bottom surface of the vacuum furnace 1 is provided with a limiting platform 8 for limiting the aluminum parts and a welding device 9 set on the limiting platform 8 for welding the aluminum parts. The limiting platform 8 is provided with a support frame 7 for controlling the height adjustment of the welding device 9. The support frame 7 is provided with a screw drive structure for controlling the lifting and lowering of the welding device 9. The support frame 7 is rotatably set on the limiting platform 8. The air blowing structure 2 includes a guide ring 10 detachably set on the outer wall of the vacuum furnace 1 and a plurality of air blowing pipes 11 arranged in a circular array on the inner side of the vacuum furnace 1. One end of the air blowing pipe 11 is connected to the guide ring 10, and the other end of the air blowing pipe 11 is provided with a screw drive structure for controlling the lifting and lowering of the welding device 9. There is an adjusting seat 12, and an air blowing nozzle 13 connected to the air blowing pipe 11 is rotatably provided on the inner side of the adjusting seat 12. The air blowing nozzle 13 can adjust the blowing angle on the adjusting seat 12. The air blowing nozzle 13 can blow air onto the aluminum parts on the limiting platform 8. The outer side of the vacuum furnace 1 is provided with a gas storage box 5 for storing protective gas. The gas storage box 5 is provided with a gas supply pump 54. The inside of the gas storage box 5 is provided with several gas storage tanks connected to the gas supply pump 54. The gas supply pump 54 introduces the protective gas into the gas guide ring 10 through the gas guide pipe 55, and then evenly introduces the gas into several air blowing nozzles 13 through the gas guide ring 10 and the air blowing pipe 11.

[0045] In this embodiment, the air supply pump 54 is started, and the protective gas is introduced into the air guide ring 10 through the air guide pipe 55. Then, the protective gas is introduced into several air blowing pipes 11 through the air guide ring 10, so that the air blowing pipes 11 blow the protective gas onto the aluminum part through the air blowing nozzle 13, protecting the aluminum part while cleaning the impurities generated during the welding of the aluminum part.

[0046] In this invention, the exhaust structure 3 includes an exhaust hood 14 detachably installed on the inner top surface of the vacuum furnace 1 and an exhaust main pipe 15 disposed at the top of the vacuum furnace 1 and communicating with the exhaust hood 14. The upper end of the exhaust hood 14 is provided with a connector 16 communicating with the exhaust main pipe 15. The lower middle part of the connector 16 is provided with a suction hood 17 extending into the exhaust hood 14. The lower edge of the connector 16 is provided with a plurality of exhaust secondary pipes 18 arranged in a circular array to fit against the inner wall of the exhaust hood 14. The exhaust secondary pipes 18 are aligned with the blowing nozzle 13.

[0047] In this embodiment, the exhaust structure 3 is activated, and the protective gas inside the vacuum furnace 1 is discharged through the exhaust hood 14, so that the suction hood 17 and the exhaust secondary pipe 18 cooperate to exhaust, so that the blowing structure 2 and the exhaust structure 3 form a downward blowing and upward exhaust, and the aluminum parts are rapidly cooled.

[0048] In step S4, the filter box 4 is detachably installed on the outer wall of the vacuum furnace 1. The other end of the exhaust pipe 15 is connected to the filter box 4. The filter box 4 has a cylindrical filter chamber. Several rotating rings 19 are rotatably installed in the filter box 4. The inner wall of the rotating rings 19 is provided with filter elements 20. The end of the filter box 4 away from the vacuum furnace 1 is provided with a suction pipe 21. One end of the suction pipe 21 is provided with a suction device 22, so that the gas in the exhaust pipe 15 is filtered by the filter elements 20 and then discharged and collected through the suction pipe 21.

[0049] In this embodiment, the vacuum pumping device 22 is activated, and negative pressure is applied through the vacuum pipe 21 to draw the protective gas and impurities in the vacuum furnace 1 into the filter box 4 through the exhaust pipe 15. The filter element 20 filters the impurities, and the protective gas is collected and processed through the vacuum pumping device 22.

[0050] In this invention, one side of the filter element 20 is flush with one side of the rotating ring 19. A scraper 23 that fits with the filter element 20 is vertically arranged in the filter box 4. A protective box 24 that fits with the rotating ring 19 is arranged in the filter box 4. A connecting ring 25 that is coaxially connected to the rotating ring 19 is arranged in the protective box 24. A drive motor 26 that controls the rotation of the connecting ring 25 is arranged on the outer wall of the filter box 4.

[0051] In this embodiment, the drive motor 26 is started, which drives the connecting ring 25 to rotate, causing the connecting ring 25 to drive the rotating ring 19 to rotate, which in turn drives the filter element 20 to rotate, so that the scraper 23 cleans the impurities adhering to the filter element 20.

[0052] In this invention, the protective box 24 is provided with a rotating internal gear ring 27 coaxially connected to the connecting ring 25. The protective box 24 is provided with a main gear 28 that controls the rotation of the rotating internal gear ring 27. One end of the main gear 28 is coaxially provided with a first bevel gear structure 29. The drive motor 26 is provided with a connecting rod coaxially connected to the first bevel gear structure 29, so that the drive motor 26 controls the rotation of the rotating internal gear ring 27 through the first bevel gear structure 29 and the main gear 28, thereby causing the connecting ring 25 to control the rotation of the filter element 20 through the rotating ring 19, so that the scraper 23 cleans the filter element 20.

[0053] In this embodiment, the drive motor 26 is started, which drives the first bevel gear structure 29 to work through the connecting rod. The first bevel gear structure 29 drives the main gear 28 to rotate, which in turn drives the rotating internal gear ring 27 to rotate. The rotating internal gear ring 27 then drives the connecting ring 25 to rotate, which in turn drives the rotating ring 19 to rotate.

[0054] Example 2 Based on Example 1, referring to Figures 5-10This is the second embodiment of the present invention. In this invention, the outer wall of the rotating ring 19 is provided with a guide ring 30 that is connected to the filter box 4. The filter box 4 is provided with a guide groove that matches the guide ring 30. The filter box 4 is provided with a feed inlet 31 that matches the scraper 23. The feed inlet 31 is located on the lower side of the filter box 4. Two arc-shaped sealing plates 32 are movably arranged in the feed inlet 31. The two arc-shaped sealing plates 32 are respectively staggered vertically in the feed inlet 31. The outer side of the guide ring 30 is provided with a transmission component that controls the movement of the arc-shaped sealing plates 32. The transmission component can continuously open or close the feed inlet 31 as the rotating ring 19 rotates, so as to guide the impurities in the feed inlet 31 into the collection structure 6.

[0055] In this embodiment, when the rotating ring 19 rotates, it causes the guide ring 30 to rotate. The guide ring 30 drives the arc-shaped sealing plate 32 to move in the feed inlet 31 through the transmission component, so that the arc-shaped sealing plate 32 opens or closes the feed inlet 31, thereby guiding the impurities in the feed inlet 31 into the collection structure 6 and preventing the air extraction device 22 from sucking the impurities in the collection structure 6 into the filter box 4.

[0056] In step S5, the transmission assembly includes several first transmission racks 33 arranged in a circular array on the outer wall of the guide ring 30 and second transmission racks 34 respectively aligned and connected to the arc-shaped sealing plate 32. The two second transmission racks 34 are respectively staggered on both sides of the feed inlet 31. The second transmission racks 34 are aligned with the arc-shaped sealing plate 32. One side of the arc-shaped sealing plate 32 is provided with several reinforcing rods connected to the second transmission racks 34.

[0057] In this embodiment, when the guide ring 30 rotates, it drives several first transmission racks 33 to rotate, causing the first transmission racks 33 to drive the second transmission racks 34 to move, and the second transmission racks 34 to drive the arc-shaped sealing plate 32 to move through the reinforcing rod.

[0058] In this invention, the transmission assembly further includes a first transmission gear 35 meshing with the first transmission rack 33. The first transmission gear 35 meshes with the upper second transmission rack 34, so that the first transmission rack 33 controls the movement of the second transmission rack 34 through the first transmission gear 35, thereby controlling the movement of the upper arc-shaped sealing plate 32. The transmission assembly also includes a second transmission gear 36 meshing with the first transmission gear 35. The second transmission gear 36 meshes with the lower second transmission rack 34, so that the first transmission rack 33 rotates through the first transmission gear 35 and the second transmission gear 36, thereby allowing the second transmission rack 34 to control the movement of the lower arc-shaped sealing plate 32. The filter box 4 is provided with an arc-shaped guide rod 56 that is guided and connected to the second transmission rack 34. The arc-shaped sealing plate 32 is provided with a guide hole that matches the arc-shaped guide rod 56. A return spring connected to the second transmission rack 34 is sleeved on the arc-shaped guide rod 56.

[0059] In this embodiment, when the guide ring 30 rotates, it drives several first transmission racks 33 to rotate, causing the first transmission racks 33 to drive the first transmission gear 35 to rotate. The first transmission gear 35 drives the second transmission rack 34 to move, causing the second transmission rack 34 to drive the upper arc-shaped sealing plate 32 to move. When the guide ring 30 drives another first transmission gear 35 to rotate through the first transmission rack 33, the first transmission gear 35 drives the second transmission gear 36 to rotate. The second transmission gear 36 drives the lower arc-shaped sealing plate 32 to move. When the arc-shaped sealing plate 32 moves, the arc-shaped guide rod 56 moves in the guide hole, causing the reset spring to reset the arc-shaped sealing plate 32.

[0060] In this invention, the collection structure 6 includes a first collection box 37 fitted to the lower side of the filter box 4 and communicating with the feed inlet 31, and a second collection box 38 detachably fixed to the bottom of the first collection box 37. The lower side of the filter box 4 is symmetrically provided with mounting bases 39 that fit against the first collection box 37. The first collection box 37 is provided with mounting strips 40 detachably connected to the mounting bases 39. The upper end of the first collection box 37 has a first feed inlet matching the feed inlet 31. The interior of the first collection box 37 is provided with a discharge trough in the shape of a circular funnel. The bottom of the first collection box 37... The first collection box 37 is provided with a discharge port 41 that communicates with the discharge trough. A scraper 42 for cleaning the discharge trough is detachably provided on the first collection box 37. A rotating rod 43 is provided on the scraper 42. The upper end of the rotating rod 43 passes through the filter box 4 and extends into the protective box 24. A second bevel gear structure 44 is provided in the protective box 24 and is coaxially connected to the rotating rod 43. A driven gear 45 that meshes with the rotating internal gear ring 27 is provided on the second bevel gear structure 44. When the rotating ring 19 rotates, the driven gear 45 and the second bevel gear structure 44 cooperate to control the scraper 42 to clean the discharge trough.

[0061] In this embodiment, when impurities enter the first collection box 37 from the feed inlet 31, the rotating internal gear ring 27 rotates, causing the driven gear 45 to rotate. The driven gear 45 drives the second bevel gear structure 44 to rotate, and the second bevel gear structure 44 drives the rotating rod 43 to rotate. The rotating rod 43 drives the scraper 42 to clean, cleaning the impurities in the discharge trough and guiding them into the second collection box 38 through the discharge inlet 41.

[0062] Example 3 Based on Example 2, referring to Figures 9-12 This is the third embodiment of the present invention. In this invention, the second collection box 38 is provided with a second inlet that is aligned with the discharge port 41. The upper middle part of the second collection box 38 is symmetrically provided with a limiting strip 46 that is inserted into the first collection box 37. The first collection box 37 is provided with a limiting groove that matches the limiting strip 46. A limiting gear 47 that is rotatably connected to the limiting strip 46 is provided in the first collection box 37. The limiting strip 46 is provided with a limiting rack 48 that meshes with the limiting gear 47. The limiting strip 46 is provided with a first groove that matches the limiting rack 48.

[0063] In this embodiment, when the second collection box 38 is installed on the first collection box 37, the limiting strip 46 is inserted into the limiting groove, causing the limiting strip 46 to drive the limiting rack 48 to move, and the limiting rack 48 to drive the limiting gear 47 to rotate.

[0064] In this invention, the first collection box 37 is provided with a third bevel gear structure 49 coaxially connected to the limiting gear 47. A moving gear 50 is coaxially provided on one side of the third bevel gear structure 49. A blocking block 51 is symmetrically provided in the first collection box 37, which is connected to the moving gear 50 and blocks the discharge port 41. A moving rack 52 that meshes with the moving gear 50 is provided on the lower end face of the blocking block 51. A second groove that matches the moving rack 52 is opened at the bottom end of the blocking block 51.

[0065] In this embodiment, the second collection box 38 is installed on the first collection box 37. The limiting strip 46 drives the limiting gear 47 to rotate through the limiting rack 48, which in turn drives the third bevel gear structure 49 to rotate. The third bevel gear structure 49 drives the moving gear 50 to rotate, which in turn drives the moving rack 52 to move. The moving rack 52 then drives the sealing block 51 to move, causing the sealing block 51 to move in the discharge port 41 and open the discharge port 41, thus connecting the second collection box 38 with the first collection box 37.

[0066] In this invention, the upper edge of the second collection box 38 is symmetrically provided with connecting strips 53, and the outer surfaces of the first collection box 37 are provided with connecting grooves that connect with the connecting strips 53 on both sides.

[0067] In this embodiment, the second collection box 38 is removed from the first collection box 37, so that the connecting strip 53 is removed from the connecting groove, the limiting strip 46 is moved out of the limiting groove, and the sealing block 51 moves in the discharge port 41 to close the discharge port 41.

[0068] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A welding process for liquid-cooled heat dissipation aluminum components, characterized in that, Includes the following steps: S1. Pre-treat the aluminum parts before welding, load them into the vacuum furnace, and evacuate the vacuum furnace. S2. The aluminum parts are heated uniformly to melt and diffuse the brazing filler metal, and then vacuum welded. S3. The protective gas is introduced into the vacuum furnace through the blowing structure and the aluminum parts after welding are cleaned. The exhaust structure discharges the protective gas and the cleaned impurities from the vacuum furnace. S4. The discharged protective gas and impurities are introduced into the filter box for treatment, and the protective gas after filtering the impurities is introduced into the treatment and collection for recycling. S5. Collect the filtered impurities through the collection structure and load and unload the welded aluminum parts.

2. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 1, characterized in that, The air blowing structure includes: The gas guide ring is set on the outer wall of the vacuum furnace and connected to the gas storage tank through a gas supply pump; An air blowing pipe is installed inside the vacuum furnace and connected to the air guide ring. The air blowing pipe is equipped with an adjustable air blowing nozzle via an adjusting seat. The exhaust structure includes: An exhaust hood is installed on the top surface inside the vacuum furnace, and an exhaust pipe extending out of the vacuum furnace is provided through an adapter. The air intake hood is connected to the lower middle part of the adapter. The lower edge of the adapter is provided with a number of exhaust pipes aligned with the air blowing nozzle in a circular array.

3. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 2, characterized in that, The other end of the exhaust pipe is connected to the filter box; The filter box is equipped with several rotating rings; The rotating ring is flush with a filter element; The filter box is vertically equipped with a scraper that fits against the filter element; The filter box is equipped with a protective box that fits against the rotating ring; The protective box is provided with a connecting ring that is coaxially connected to the rotating ring; The outer wall of the filter box is equipped with a drive motor that controls the rotation of the connecting ring.

4. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 3, characterized in that, The protective box is provided with a rotating internal gear ring that is coaxially connected to the connecting ring. The protective box is equipped with a main gear that controls the rotation of the internal gear ring. One end of the main gear is coaxially provided with a first bevel gear structure that is connected to the drive motor.

5. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 4, characterized in that, The outer wall of the rotating ring is provided with a guide ring that is connected to the filter box for guidance. The filter box is provided with a feed inlet that matches the scraper; The feed inlet is equipped with two arc-shaped sealing plates that fit together vertically. The outer wall of the guide ring is provided with a plurality of first transmission racks in a circular array; The filter box is equipped with a second transmission rack that is aligned and connected to the arc-shaped sealing plate.

6. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 5, characterized in that, The filter box is provided with a first transmission gear that meshes with the first transmission rack; The first transmission gear meshes with the second transmission rack above it; The first transmission rack drives the second transmission rack to move through the first transmission gear, thereby controlling the movement of the upper arc-shaped sealing plate; The filter box is provided with a second transmission gear that meshes with the first transmission gear; The second transmission gear meshes with the lower second transmission rack; The filter box is provided with an arc-shaped guide rod that is guided and connected to the second transmission rack; A return spring connected to the second transmission rack is fitted onto the arc-shaped guide rod.

7. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 6, characterized in that, The collection structure includes: The first collection box is fitted to the lower side of the filter box and is connected to the feed inlet; The second collection box is detachably disposed at the lower end of the first collection box and is provided with a second feed inlet communicating with the first collection box; The bottom of the first collection box is provided with a discharge port that communicates with the second feed port.

8. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 7, characterized in that, The second collection box is equipped with a scraper for cleaning impurities; The scraper is equipped with a rotating rod; The upper end of the rotating rod passes through the filter box and extends into the protective box; The protective box is equipped with a second bevel gear structure that is coaxially connected to the rotating rod. The second bevel gear structure is provided with a driven gear that meshes with the rotating internal gear ring, so that when the rotating ring rotates, the driven gear and the second bevel gear structure work together to control the scraper to clean the discharge trough.

9. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 8, characterized in that, The second collection box has symmetrically arranged limiting strips at the upper middle part that can be inserted into the first collection box; The first collection box is equipped with a limiting gear that is rotatably connected to the limiting bar. The limiting strip is provided with a limiting rack that meshes with the limiting gear; The limiting strip has a first groove that matches the limiting toothed rack.

10. The welding process for a liquid-cooled heat dissipation aluminum component according to claim 9, characterized in that, The first collection box is provided with a third bevel gear structure that is coaxially connected to the limiting gear; A movable gear is coaxially provided on one side of the third bevel gear structure; The first collection box is symmetrically provided with sealing blocks that are connected to the moving gear transmission and seal the discharge port; The lower end face of the sealing block is provided with a movable rack that meshes with the movable gear.

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