Processing method of U-shaped water circulation cooling structure and welding device thereof

Abstract

The application discloses a processing method of a U-shaped water circulation cooling structure and a welding device thereof, and comprises the following processing steps: S1, preparing a flat tubular waterproof sheet base body and a base for assembling and fixing the waterproof sheet; S2, pre-preparing an integrated pre-assembled component, embedding and clamping the fusible metal sheet into the clamping groove of the positioning metal part to form the integrated pre-assembled component; S3, limiting the axial and radial positions of the pre-assembled component in the waterproof sheet base body by using an embedded positioning tool to complete the pre-positioning operation; S4, directionally heating and melting the fusible metal sheet, and forming a closed partition after the metal is cooled and solidified, so that the internal flow channel of the base body is separated to form a U-shaped water circulation channel; and S5, assembling the formed waterproof sheet to the base and completing sealed welding. The internal welding process is additionally arranged, the internal sealing and blocking effect is strengthened, the medium leakage risk is reduced, the overall sealing performance of the cooling structure is optimized, and the structure is simple and suitable for batch processing and production.

Description

Technical Field

[0001] This invention relates to the field of water circulation, and in particular to a processing method and welding apparatus for a U-shaped water circulation cooling structure. Background Technology

[0002] U-shaped water circulation cooling structures, with their compact flow channel layout and excellent heat exchange performance, are widely used in temperature control fields such as heat dissipation for precision devices and cooling for power batteries. In the prior art, a processing method and welding apparatus for a U-shaped water circulation cooling structure have been disclosed (hereinafter referred to as Prior Art Document 1). This method discloses a fabrication process for a flat tubular waterproof sheet substrate. By pre-installing an integrated pre-assembly component inside the waterproof sheet, a sealed partition is formed inside the substrate by heating and melting a fusible metal sheet, thereby forming a U-shaped water circulation channel. The formed waterproof sheet is then assembled onto a base to complete the sealing welding, realizing the overall processing and fabrication of the water circulation cooling structure. This method possesses the advantages of stable structural forming and good partition sealing performance.

[0003] In addition, existing patent CN202223533054.3 (hereinafter referred to as prior art 2) discloses a cooling fin type water-cooling structure with a partition plate. This scheme sets up a partition plate to divide the cooling flow channels and optimize the arrangement of the water-cooling structure. However, this prior art only describes the assembly structure of the partition plate and the cooling fins, without disclosing the specific welding method of welding the partition plate to the cooling fins, lacking the welding process description of internal components, and leaving a technical gap in the internal sealing connection method.

[0004] Based on the aforementioned prior art, in order to further optimize the sealing performance of the U-shaped water circulation cooling structure, this application provides targeted supplementary optimizations to the welding process of the cooling structure. Prior art document 1 mainly completes the forming and processing of the cooling structure and the welding of the external base, but does not disclose the welding process adapted to the interior of the waterproof sheet; prior art document 2 also does not disclose the welding and fixing method of the internal partition components.

[0005] Based on the existing U-shaped water circulation cooling structure, this application proposes a U-shaped water circulation cooling device and its heat dissipation method, adding a dedicated welding method that enables the welding of waterproof strips inside the waterproof sheet, strengthening the sealing and barrier effect inside the waterproof sheet, optimizing the overall sealing performance of the cooling structure, and matching a dedicated heat dissipation control method to ensure the long-term stable operation of the cooling device. Summary of the Invention

[0006] This application provides a processing method and welding device for a U-shaped water circulation cooling structure, which enables the welding of waterproof strips inside the waterproof sheet, enhances the internal sealing and barrier effect of the waterproof sheet, and optimizes the overall sealing performance of the cooling structure.

[0007] The technical solution adopted in this application is as follows.

[0008] A method for manufacturing a U-shaped water circulation cooling structure includes the following manufacturing steps: S1. Prepare a flat tubular waterproof sheet substrate and a base for assembling and fixing the waterproof sheet; S2. Prefabricated integrated pre-assembled component: A slot is opened inside the positioning metal part, and a fusible metal sheet is pre-embedded and fixed in the slot to form an integrated pre-assembled component; S3. Using the built-in positioning fixture, the integrated pre-assembled component is assembled into the waterproof sheet substrate, limiting the axial and radial positions of the integrated pre-assembled component inside the waterproof sheet substrate, completing the pre-positioning and fixing, so that the heating point of the subsequent heating process corresponds to the fusible metal sheet. S4. The fusible metal sheet in the integrated pre-assembled component is directionally heated and melted. After the molten fusible metal is cooled and solidified, it forms a sealed partition inside the waterproof sheet substrate. The sealed partition separates the internal flow channels of the substrate to form a U-shaped water circulation channel. S5. Assemble the formed waterproof sheet onto the base, and seal the connection between the waterproof sheet and the base by welding to complete the overall processing and forming of the U-shaped water circulation structure.

[0009] As a further improvement to the above technical solution: the waterproof sheet substrate is formed by graded pressing of metal round tubes. The metal round tubes are pressed and shaped twice using a pressing device. The two pressing processes are matched with thickness limiting plates of different specifications, and the pressing rates are different, so as to achieve fixed thickness forming of the tube.

[0010] As a further improvement to the above technical solution: the built-in positioning fixture is a U-shaped limiting tool, the positioning metal part is equipped with an anti-reverse installation identification structure, and the U-shaped limiting tool and the end structure of the positioning metal part are aligned and adapted to achieve lateral limiting and centering positioning.

[0011] As a further improvement to the above technical solution: In step S3, the integrated pre-assembled component is pressed and fixed by a low-pressure pressing method, so that the integrated pre-assembled component fits against the inner wall of the waterproof sheet substrate.

[0012] As a further improvement to the above technical solution, it also includes an end sealing process, in which an edge sealing metal sheet is placed at the end of the waterproof sheet substrate and welded to form a closed structure at the end of the waterproof sheet.

[0013] As a further improvement to the above technical solution: In step S4, a constant temperature heating device is used to heat the fusible metal sheet at a fixed point. The heating position corresponds precisely to the fusible metal sheet, and the temperature is controlled so that the fusible metal sheet is completely melted without damaging the waterproof sheet substrate.

[0014] A welding device for a U-shaped water-circulating cooling structure includes a base, slide rails, positioning structures, a conveyor belt, guide bars, heating equipment, and welding structures. The slide rails are arranged in pairs, opposite to each other, on the base. Several positioning structures are arrayed along the length of the slide rails. The conveyor belt is installed on the inner wall of the slide rails, and the positioning structures are connected to the conveyor belt and move synchronously. The conveyor belt is connected to an external power source. The guide bars are installed on the outer side of the slide rails, and their engagement points with the positioning structures are correspondingly arranged. The heating equipment and the welding structures are both installed on the base, with the heating equipment corresponding to a fusible metal sheet and the welding structures corresponding to a sealing metal sheet.

[0015] As a further improvement to the above technical solution: the positioning structure includes a slider, a pressing plate, a clamping block, and a pre-positioning block; rollers are provided on both sides of the slider; a first sliding groove is formed on the inner side wall of the slide rail, and the rollers are embedded in the first sliding groove; the pre-positioning block is disposed on the slider, and a first limiting groove adapted to the waterproof sheet is formed on the pre-positioning block, and the waterproof sheet is inserted into the first limiting groove; the pressing plates are arranged in pairs and opposite to each other, and the pressing plates are hinged to the slider; the clamping block is detachably connected to the pressing plate, and a second limiting groove is formed on the side of the clamping block facing the waterproof sheet, and the second limiting groove is adapted to the waterproof sheet.

[0016] As a further improvement to the above technical solution: the guide strip includes two parallel and laterally staggered straight edge segments, and arc transition segments connecting the two ends of the two straight edge segments respectively; the straight edge segments and the arc transition segments are smoothly connected; a second sliding groove is provided on the guide strip; a rod is hinged to the pressing plate, and a ball is provided at the end of the rod, the ball being slidably embedded in the second sliding groove; when the positioning structure moves to the straight section of the guide strip, the pressing plate is in a clamped state; when the positioning structure moves to the arc transition section of the guide strip, the pressing plate is in an open state.

[0017] As a further improvement to the above technical solution: a lower pressure plate is mounted on the guide strip; the lower pressure plate is located in the area where the clamping plate gradually clamps, the lower pressure plate is arranged at an angle, and the height difference between its lowest point and the bearing end face of the prepositioning block is adapted to the height of the waterproof sheet, which is used to limit the placement position of the waterproof sheet on the prepositioning block.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. By employing a graded pressing method to prepare the waterproof sheet substrate, and using a U-shaped limiting fixture to complete the pre-positioning assembly of the integrated pre-assembled components, uniform pipe forming thickness can be ensured, while reducing internal component assembly deviations. This processing flow is sequential and rationally arranged, stably forming a sealed partition within the waterproof sheet substrate, resulting in a well-structured U-shaped water circulation channel and improving the forming qualification rate of cooling components.

[0019] 2. By employing an internal welding reinforcement process after the partition is formed, the joints between the internal partitions are fused together, and a waterproof welding strip is formed to achieve a secondary seal. Compared to the method in prior art 2, which relies solely on mechanical insertion to fix the partition plates, this application can eliminate internal assembly gaps, reduce cooling medium leakage and cross-contamination, and optimize the internal sealing performance of the water-cooled plate.

[0020] 3. The automatic opening and closing clamping of the pressure plate is achieved through a guide bar misalignment structure combined with a ball and rod transmission structure, eliminating the need for repeated manual disassembly and repositioning. The array-arranged positioning structure enables continuous workpiece conveying, simplifying manual operation procedures.

[0021] 4. Due to the use of inclined pressure plates on the guide strip, combined with prepositioning blocks and detachable clamping blocks to form a multi-limiting structure, the sheet-shaped waterproof sheet can be vertically corrected and laterally fixed, avoiding the workpiece from warping or shifting during conveying, heating and welding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the welding device for the U-shaped water circulation cooling structure in this invention.

[0023] Figure 2 This is a side view of the welding device for the U-shaped water circulation cooling structure in this invention.

[0024] Figure 3 This is a cross-sectional view of the positioning structure clamping in this invention.

[0025] Figure 4 This is a cross-sectional view of the positioning structure in this invention.

[0026] Figure 5 This is a schematic diagram of the positioning structure clamping and opening in this invention.

[0027] Figure 6 This is a schematic diagram of the guide strip in this invention.

[0028] Figure 7 This is a schematic diagram of the other side of the guide strip in this invention.

[0029] Figure 8 This is a schematic diagram of the processing method of the U-shaped water circulation cooling structure in this invention.

[0030] In the diagram: 1. Base; 2. Slide rail; 21. First slide groove; 3. Positioning structure; 31. Slider; 32. Pressure plate; 33. Clamping block; 34. Pre-positioning block; 35. Roller; 36. First limiting groove; 37. Second limiting groove; 38. Rod; 39. Ball; 4. Conveyor belt; 5. Guide bar; 51. Second slide groove; 52. Lower pressure plate; 53. Straight edge section; 54. Arc transition section; 6. Heating equipment; 7. Welding structure; 8. Waterproof sheet substrate; 9. Positioning metal parts; 10. Slot; 11. Fusible metal sheet; 12. Integrated pre-assembled assembly; 13. Built-in positioning fixture. Detailed Implementation

[0031] This application provides a processing method and welding device for a U-shaped water circulation cooling structure, which enables the welding of waterproof strips inside the waterproof sheet, enhances the internal sealing and barrier effect of the waterproof sheet, and optimizes the overall sealing performance of the cooling structure.

[0032] The technical solution in this application is to solve the above problems, and the overall approach is as follows: To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0033] This embodiment discloses a U-shaped water circulation cooling device, which is manufactured using a U-shaped water circulation cooling structure processing method and is suitable for temperature control and heat dissipation scenarios of power batteries and precision electronic components. The cooling device mainly includes a waterproof sheet substrate 8, an integrated pre-assembled component 12, internal waterproof welding strips, and an assembly base; the waterproof sheet substrate 8 is a plate-shaped component formed by processing metal sheet, with an overall flat plate structure, and an internal water-cooled flow cavity for circulating cooling medium and realizing heat exchange.

[0034] The integrated pre-assembled component 12 is assembled inside the waterproof sheet substrate 8. The integrated pre-assembled component 12 includes a copper positioning metal part 9 and a silver fusible metal sheet 11. The positioning metal part 9 has a slot 10 inside, and the fusible metal sheet 11 is embedded and secured inside the slot 10. This embodiment differs from the prior art by adding a waterproof strip welding process inside the waterproof sheet substrate 8. A waterproof welding strip is formed inside the waterproof sheet substrate 8 through a special welding method, so that the internal partition position is sealed twice, which makes up for the shortcomings of traditional water-cooled inserts that only rely on the assembly of partitions and have no internal welding reinforcement.

[0035] In this embodiment, a dedicated U-shaped water-circulating cooling structure welding device is used to complete continuous processing during the manufacturing process, enabling automatic conveying, precise positioning, point heating, and sealing welding of the waterproof sheet. Specifically, the welding device includes a base 1, a slide rail 2, a positioning structure 3, a conveyor belt 4, a guide bar 5, a heating device 6, and a welding structure 7. The base 1 serves as the foundation for the entire machine, used to fix various functional components. The slide rails 2 are installed in pairs and relatively fixed on the upper surface of the base 1 to ensure a straight and stable conveying path. The positioning structures 3 are arranged in an array at equal intervals along the length of the slide rails 2, used to individually support a single set of waterproof sheet workpieces, enabling batch continuous production. The conveyor belt 4 is arranged on the inner wall of the slide rails 2, and the conveyor belt 4 forms a transmission cooperation with each positioning structure 3, relying on an external power source to provide forward power, driving all positioning structures 3 to make synchronous linear displacement along the slide rails 2. The positioning structure 3 is used to clamp and fix the waterproof sheet, and specifically includes a slider 31, a pressure plate 32, a clamping block 33, and a pre-positioning block 34. Rollers 35 are rotatably mounted on both sides of the slider 31. The inner side wall of the slide rail 2 is provided with a first slide groove 21 matching the rollers 35. The rollers 35 are embedded in the first slide groove 21 and roll and slide, reducing the frictional resistance during the movement of the positioning structure 3. The pre-positioning block 34 is fixed to the upper end of the slider 31 and is used to initially support and place the waterproof sheet. The pressure plate 32 is installed in pairs on both sides of the slider 31 and has a rotational stroke for clamping inward and opening outward. The clamping block 33 is fixed to the inner side of the pressure plate 32 in a detachable manner. The guide bar 5 is fixedly arranged on the outside of the slide rail 2. The guide bar 5 includes two straight sections that are staggered and parallel to each other in the horizontal direction, and the two ends are smoothly connected by arc sections. This lateral staggered structure can adapt to the opening and closing motion trajectory of the pressure plate 32, avoid motion interference, adapt to the dynamic clamping stroke of the positioning structure 3, and ensure that the pressure plate 32 opens smoothly in the arc section position and is stably clamped in the straight section position. A second slide groove 51 is opened inside the guide bar 5. A rod 38 is hinged to the outside of the pressure plate 32. A ball 39 is fixedly embedded at the end of the rod 38. The ball 39 can be slidably embedded in the second slide groove 51. Relying on the contour trajectory of the guide bar 5 itself, the ball 39 can drive the rod 38 to deflect during the sliding process along the second slide groove 51, thereby controlling the pressure plate 32 to complete the automatic opening and closing action. In addition, a downward pressure plate 52 is mounted on the guide strip 5. The downward pressure plate 52 is arranged in the movement area where the clamping plate 32 gradually clamps. The inclined slope structure is used to vertically press down and limit the waterproof sheet during the movement, limiting the vertical height of the waterproof sheet on the prepositioning block 34. This prevents the waterproof sheet from tilting, shifting, or having inconsistent placement height, and further improves the alignment accuracy of the subsequent heating and welding processes.

[0036] The specific processing and welding steps in this embodiment are as follows: S1. Substrate Pressing and Forming Process: A metal round tube with good ductility is selected as the raw material. A graded slow pressing process is used to shape the metal round tube, preparing a plate-shaped waterproof sheet substrate 8. During processing, a pressing device is used to perform two step-by-step pressing and shaping operations. The two pressing operations are matched with thickness-limiting plates of different specifications, thereby controlling the flattening thickness of the tube step by step. Different pressing rates are set for the two pressing operations. The initial pressing rate is faster to achieve rapid flattening and forming of the tube, while the subsequent pressing rate is slowed down to finely level and correct the thickness of the tube wall, avoiding tube wall wrinkles and uneven wall thickness caused by high-speed pressing. The graded pressing method ensures that the formed waterproof sheet substrate 8 has a flat surface and uniform wall thickness, meeting the assembly accuracy requirements of plate-type water-cooled components.

[0037] S2. Prefabrication process of integrated pre-assembled component 12: Copper is selected and processed to prepare the positioning metal part 9. Copper has the material properties of high thermal conductivity, moderate hardness, and strong plasticity, making it easy to mill and shape and able to quickly conduct heat. Based on the internal flow channel dimensions of the waterproof sheet substrate 8, an embedded slot 10 for the fusible metal sheet 11 is opened inside the positioning metal part 9. The slot 10 is integrally milled to ensure a smooth inner wall and precise positioning. A thin silver sheet is selected as the fusible metal sheet 11. Silver has a low melting point and good fluidity, and can quickly melt and fill small gaps after heating, adapting to the internal... The partition molding process involves inserting a silver fusible metal sheet 11 into the slot 10 via interference fit, achieving glue-free pre-assembly. After securing, a special U-shaped limiting tool is used to calibrate and align the pre-assembled assembly. The U-shaped limiting tool and the matching structure at the end of the positioning metal part 9 are used to achieve lateral limiting and anti-deviation correction, ensuring that the fusible metal sheet 11 is free from offset, warping, and skewing. This allows the positioning metal part 9 and the fusible metal sheet 11 to form a structurally stable and highly coaxial integrated pre-assembled component 1212, preventing the metal sheet from falling off, misaligning, or shifting during subsequent assembly and heating.

[0038] S3. Internal Pre-assembly and Tooling Positioning Process: After assembly, the integrated pre-assembly component 1212 is lightly pressed and bonded using a low-pressure, uniform-speed pressing method to eliminate the assembly gap between the component and the inner wall of the substrate. Subsequently, the assembled waterproof sheet is manually placed inside the first limiting groove 36 of the pre-positioning block 34 of the welding device to complete the initial support and positioning. An external power source drives the conveyor belt 4 to operate, and the conveyor belt 4 drives the arrayed positioning structure 3 to be conveyed in a uniform linear motion along the slide rail 2. The waterproof sheet moves synchronously with the slider 31. During the conveying process, the waterproof sheet gradually enters the pressing area of ​​the lower pressure plate 52. The vertical height of the waterproof sheet is corrected by the guiding and squeezing action of the inclined slope of the lower pressure plate 52, which restricts the floating and warping of the sheet and ensures that the placement height of each group of waterproof sheets is uniform, providing a precise benchmark for subsequent heating and welding processes.

[0039] S4. Constant Temperature Melting Partition Molding Process: When the positioning structure 3 carrying the waterproof sheet is conveyed to the area directly below the heating equipment 6, the conveyor belt 4 briefly pauses to complete the fixed-point positioning. The constant temperature heating equipment 6 is used to perform fixed-point heating. The heating end of the heating equipment 6 is vertically downward and precisely aligned with the fusible metal sheet 11 inside the pre-assembled component, forming a one-to-one precise heating point. During the processing, the heating temperature is strictly controlled. The temperature is higher than the melting point of the silver sheet but lower than the melting point of the waterproof sheet substrate 8, ensuring that the fusible metal sheet 11 can be completely melted and liquefied, while avoiding high-temperature burns and erosion of the waterproof sheet substrate. The molten liquid metal has good fluidity and naturally fills the tiny gaps between the positioning metal part 9 and the substrate. After heating, it naturally cools and solidifies, forming an integrated sealed partition inside the waterproof sheet substrate 8. This sealed partition completely separates the hollow cavity inside the substrate, dividing the originally straight internal flow channel into a connected U-shaped water circulation channel, meeting the requirements for unidirectional circulation of the medium.

[0040] S5. Internal Waterproof Strip Reinforcement Welding Process: This process is the core optimization process that distinguishes this application from the prior art. After the internal partition of the waterproof sheet is formed and naturally cooled to room temperature, the welding structure 7 is used to perform precision welding on the joint gap of the internal partition of the waterproof sheet substrate 8. For the narrow internal cavity of the plate-shaped waterproof sheet, micro-spot welding is used to continuously weld the joint of the partition edge, so that the molten welding material evenly fills the small internal gap, forming an integrated waterproof welding strip at the partition position inside the substrate. This waterproof welding strip wraps the joint gap of the partition, realizing secondary sealing and reinforcement. The existing prior art 2 only relies on the mechanical insertion and assembly of the partition plate without any internal welding fixing means. The gap at the partition is prone to water seepage and liquid cross-contamination. This application fills the technical gap of no welding reinforcement in the internal partition of the water-cooled plate through a dedicated internal welding method, and improves the internal sealing performance of the water-cooled structure.

[0041] S6. End Sealing and Overall Assembly Welding Process: After completing the internal welding operation, the positioning structure 3 continues to move the waterproof sheet to the welding structure 7 station. The nickel sealing metal sheet is manually placed at the end opening of the waterproof sheet base 8. Then, the welding structure 7 is started to perform circumferential welding on the outer ring connecting the sealing metal sheet and the waterproof sheet base 8, so that the sealing metal sheet seals and covers the end opening of the base, forming an end-closed structure to prevent the cooling medium from leaking from the end. Finally, the finished waterproof sheet is precisely snapped and assembled to the preset installation position of the metal base. The outer edge connecting the waterproof sheet and the base is fully welded using a continuous sealing welding method to eliminate the assembly gap and complete the overall processing and forming of the U-shaped water circulation cooling device.

[0042] 1. By employing a graded pressing method to prepare the waterproof sheet substrate 8, and using a U-shaped limiting fixture to complete the pre-positioning assembly of the integrated pre-assembled component 1212, uniform pipe forming thickness can be ensured, while reducing internal component assembly deviations. This processing flow is sequential and the process arrangement is reasonable, stably forming a sealed partition within the waterproof sheet substrate 8, resulting in a well-structured U-shaped water circulation channel and improving the forming qualification rate of the cooling components.

[0043] 2. By employing an internal welding reinforcement process after the partition is formed, the joints between the internal partitions are fused together, and a waterproof welding strip is formed to achieve a secondary seal. Compared to the method in prior art 2, which relies solely on mechanical insertion to fix the partition plates, this application can eliminate internal assembly gaps, reduce cooling medium leakage and cross-contamination, and optimize the internal sealing performance of the water-cooled plate.

[0044] 3. Due to the adoption of a staggered structure of guide bars 5 in conjunction with the transmission structure of balls 39 and rods 38, the clamping plate 32 can be automatically opened and closed, eliminating the need for repeated manual disassembly and positioning. The array-arranged positioning structure 3 enables continuous workpiece conveying, simplifying the manual operation process.

[0045] 4. Due to the use of inclined pressure plates 52 on guide strips 5, combined with prepositioning blocks 34 and detachable clamping blocks 33 to form a multi-limiting structure, the sheet-shaped waterproof sheet can be vertically corrected and laterally fixed, avoiding the phenomenon of workpiece warping or displacement during conveying, heating and welding.

[0046] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for processing a U-shaped water circulation cooling structure, characterized in that, The processing steps include the following: S1. Prepare a flat tubular waterproof sheet substrate (8) and a base for assembling and fixing the waterproof sheet; S2. Prefabricated integrated pre-assembled component: A slot (10) is opened inside the positioning metal part (9), and a fusible metal piece (11) is pre-embedded and fixed in the slot (10) to form an integrated pre-assembled component (12). S3. Using the built-in positioning fixture (13), the integrated pre-assembly component (12) is assembled into the waterproof sheet substrate (8), limiting the axial and radial positions of the integrated pre-assembly component (12) inside the waterproof sheet substrate (8), completing the pre-positioning and fixing, so that the heating point of the subsequent heating process corresponds to the fusible metal sheet (11). S4. The fusible metal sheet (11) in the integrated pre-assembled component (12) is directionally heated and melted. After the molten fusible metal (11) is cooled and solidified, it forms a sealed partition inside the waterproof sheet substrate (8). The sealed partition separates the internal flow channels of the substrate to form a U-shaped water circulation channel. S5. Assemble the formed waterproof sheet onto the base, and seal the connection between the waterproof sheet and the base by welding to complete the overall processing and forming of the U-shaped water circulation structure.

2. The processing method of the U-shaped water circulation cooling structure according to claim 1, characterized in that: The waterproof sheet substrate (8) is formed by pressing a metal tube in stages. The metal tube is pressed and shaped twice using a pressing device. The two pressing processes are matched with thickness limiting plates of different specifications, and the pressing rates are different to achieve fixed thickness forming of the tube.

3. The processing method of the U-shaped water circulation cooling structure according to claim 1, characterized in that: The built-in positioning fixture (13) is a U-shaped limiting tool. The positioning metal part (9) is equipped with an anti-reverse installation identification structure. The U-shaped limiting tool and the end structure of the positioning metal part (9) are aligned and adapted to achieve lateral limiting and center positioning.

4. The processing method of the U-shaped water circulation cooling structure according to claim 1, characterized in that: In step S3, the integrated pre-assembled component (12) is pressed and fixed by a low-pressure pressing method, so that the integrated pre-assembled component (12) fits against the inner wall of the waterproof sheet substrate (8).

5. The processing method of the U-shaped water circulation cooling structure according to claim 1, characterized in that: It also includes an end sealing process, in which a sealing metal sheet is placed at the end of the waterproof sheet substrate (8), and the sealing metal sheet is welded to form a closed structure at the end of the waterproof sheet.

6. The processing method of the U-shaped water circulation cooling structure according to claim 1, characterized in that: In step S4, a heating device (6) is used to heat the fusible metal sheet (11) at a fixed point. The heating position corresponds precisely to the fusible metal sheet (11). The temperature is controlled so that the fusible metal sheet (11) melts completely without damaging the waterproof sheet substrate (8).

7. A welding device for a U-shaped water circulation cooling structure, characterized in that, The system includes a base (1), a slide rail (2), a positioning structure (3), a conveyor belt (4), a guide bar (5), a heating device (6), and a welding structure (7). The slide rails (2) are arranged in pairs and opposite to each other on the base (1). Several positioning structures (3) are arranged in an array along the length of the slide rails (2). The conveyor belt (4) is arranged on the inner side wall of the slide rails (2). The positioning structure (3) is connected to the conveyor belt (4) and moves synchronously. The conveyor belt (4) is connected to an external power source. The guide bar (5) is arranged on the outer side of the slide rails (2). The guide bar (5) is correspondingly arranged at the snap-fit ​​point of the positioning structure (3). The heating device (6) and the welding structure (7) are both arranged on the base (1). The heating device (6) is arranged corresponding to the fusible metal sheet, and the welding structure (7) is arranged corresponding to the edge sealing metal sheet.

8. The welding device for the U-shaped water circulation cooling structure as described in claim 7, characterized in that, The positioning structure (3) includes a slider (31), a pressing plate (32), a clamping block (33), and a pre-positioning block (34); rollers (35) are provided on both sides of the slider (31); a first groove (21) is provided on the inner side wall of the slide rail (2), and the rollers (35) are embedded in the first groove (21); the pre-positioning block (34) is provided on the slider (31), and a first limiting groove (36) adapted to the waterproof sheet is provided on the pre-positioning block (34), and the waterproof sheet is inserted into the first limiting groove (36); the pressing plates (32) are arranged in pairs and opposite to each other, and the pressing plates (32) are hinged to the slider (31); the clamping block (33) is detachably connected to the pressing plate (32), and a second limiting groove (37) is provided on the side of the clamping block (33) facing the waterproof sheet, and the second limiting groove (37) is adapted to the waterproof sheet.

9. The welding device for the U-shaped water circulation cooling structure as described in claim 8, characterized in that, The guide bar (5) includes two parallel and laterally staggered straight edge segments (53) and arc transition segments (54) connecting the two ends of the two straight edge segments (53); the straight edge segments (53) and the arc transition segments (54) are smoothly connected; a second sliding groove (51) is provided on the guide bar (5); a rod (38) is hinged on the clamping plate (32), and a ball (39) is provided at the end of the rod (38), and the ball (39) is slidably embedded in the second sliding groove (51); when the positioning structure (3) moves to the straight section of the guide bar (5), the clamping plate (32) is in a clamped state; when the positioning structure (3) moves to the arc transition segment (54) of the guide bar (5), the clamping plate (32) is in an open state.

10. The welding device for the U-shaped water circulation cooling structure as described in claim 8, characterized in that, The guide strip (5) is provided with a lower pressure plate (52); the lower pressure plate (52) is located in the area where the clamping plate (32) is gradually clamped, the lower pressure plate (52) is arranged at an angle, and the height difference between its lowest point and the bearing end face of the prepositioning block (34) is adapted to the height of the waterproof sheet, which is used to limit the placement position of the waterproof sheet on the prepositioning block (34).

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