A server water-cooling radiator sheet metal manifold and a welding process thereof

Abstract

The application provides a server water-cooled radiator sheet metal manifold, which comprises a sheet metal pipe body for conducting server heat dissipation coolant, and a plurality of groups of the sheet metal pipe bodies are of the same specification, and the left and right sides of the plurality of groups of the sheet metal pipe bodies are each provided with a group of radiator main bodies for collecting and circulating the server heat dissipation coolant. Compared with the prior art, the application has the following beneficial effects: the pipe body one and the pipe body two are aligned and attached through the connecting convex seat and the meshing socket, so that a complete cooling liquid circulation channel can be quickly built, the smooth conduction of the cooling liquid is ensured, and there is no leakage, and the heat dissipation efficiency is effectively improved. Compared with the prior art, the process has the following beneficial effects: through the matching welding parameters and the step-by-step welding method, the welding quality and the internal structure are guaranteed to be good, multiple detection links prevent unqualified products from flowing into use, and the sealing performance, the structural stability and the durability of the sheet metal manifold are effectively improved.

Description

Technical Field

[0001] This invention relates to a sheet metal manifold for a server water-cooled radiator and its welding process, belonging to the technical field of sheet metal manifolds for water-cooled radiators. Background Technology

[0002] Existing server water-cooling manifolds suffer from low welding strength and poor structural stability. The core issues manifest as defects such as incomplete welds, lack of penetration, and undercut. Under external force or coolant pressure, these defects easily lead to cracks or even weld breakage, causing coolant leakage. This not only directly reduces heat dissipation efficiency but can also damage core server components due to leakage. Furthermore, stress concentration at the weld joints makes them prone to deformation after prolonged use, further weakening the overall connection strength. The welding area of ​​the manifolds often features irregularly shaped narrow channels, making it difficult to precisely control the penetration depth and weld bead formation using conventional welding methods. This often results in incomplete filler material and insufficient fusion surface. Low pre-welding assembly positioning accuracy leads to misalignment and uneven gaps between pipe sections, resulting in uneven stress on the weld after welding and a tendency for hidden cracks to develop. Conventional solutions to this problem often involve increasing the number of welding layers, increasing the filler material to thicken the weld, or increasing the welding current to deepen the penetration. There are also methods to repair surface defects through subsequent welding. However, these methods have significant drawbacks. Increasing the number of welding layers and the filler material can lead to excessive heat input, causing thermal deformation of the manifold sheet metal parts, damaging the internal sealing structure and flow channel precision. Increasing the welding current can easily melt through the inner wall of the manifold, damaging internal coolant flow components. Subsequent welding not only fails to eliminate the original stress concentration problem but also results in uneven weld structure, reducing overall structural stability. Furthermore, welding increases production steps and costs. Therefore, there is an urgent need for a new sheet metal manifold for server water-cooled radiators and its welding process to solve these problems. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a sheet metal manifold for a server water-cooled radiator and its welding process, comprising: a sheet metal pipe body for conducting server coolant and a radiator body for collecting server coolant, thereby solving the problems mentioned in the background art.

[0004] The technical solution of the present invention is implemented as follows: a sheet metal manifold for a server water cooling radiator, comprising: a sheet metal pipe body for conducting server cooling fluid and a radiator body for collecting server cooling fluid. The sheet metal pipe body is provided in several groups, and the several groups of sheet metal pipe bodies are of the same specification. Each of the several groups of sheet metal pipe bodies is provided with a radiator body on both the left and right sides for collecting and circulating server cooling fluid. The sheet metal tube body includes a tube body one and a meshing seat. The right side of the tube body one is provided with a set of connecting protrusions for sealing connection with a tube body two. The right side of the connecting protrusion is provided with a set of meshing seats for sealing meshing connection with it. The outer side of the meshing seat is provided with a set of outer shells for connecting the connecting protrusion cover. The left side of the outer shell is an embedded arc-shaped structure, and the right side of the connecting protrusion is a circular structure. The cross-sectional diameter of the right side of the connecting protrusion is smaller than the cross-sectional diameter of the inner side of the left end of the outer shell. The right side of the connecting boss and the inner side of the outer casing fit together, and a set of welding grooves is formed on the outer side of the fitting position to facilitate welding and fixing by the workers. The inner side of the cross-section of the welding groove is a concave structure. The first tube body and the connecting boss are an integral structure, and the second tube body, the engagement seat, and the outer casing are an integral structure. The internal structure of the first tube body and the second tube body are the same, and both have internal flow grooves for conducting server heat dissipation coolant. The internal structures of the first tube body and the second tube body are interconnected. First, align and fit the first tube body and the second tube body of the server water-cooled radiator sheet metal manifold through the connecting boss and the engagement seat, and use the inner side of the left side of the outer casing. The inlaid arc structure and the circular structure on the right side of the connecting protrusion fit together to form a sealed connection. The welding groove on the outside of the fitting provides convenience for fixation. The welding process completes the stable connection between tube body one and tube body two to ensure smooth flow of the inner flow channel. Then, several sets of sheet metal tubes of the same specifications are arranged as required, and their left and right sides are respectively connected to the corresponding heat sink body. This makes the sheet metal tubes and the heat sink body form a complete coolant conduction and collection loop. After the server cooling system is started, the coolant enters the inner flow channel of the sheet metal tube through the heat sink body, is smoothly conducted between the tubes, absorbs the server's heat, and then flows back to the heat sink body to complete the circulation and achieve continuous heat dissipation.

[0005] In a preferred embodiment, the connecting protrusion includes an outer cover and a flow tube head. The inner side of the outer cover is provided with a set of outer positioning teeth for positioning with the outer meshing tooth groove. The outer cover and the outer positioning teeth are integrally formed. The inner side of the outer positioning teeth is provided with a set of inner flywheel disks. The inner side of the inner flywheel disks is provided with an inner limiting ring. The inner side of the inner limiting ring is provided with a set of sealing plugs for improving the connection sealing effect. The sealing plugs are made of a flexible rubber material.

[0006] In a preferred embodiment, the inner side of the sealing plug seat is provided with a set of inner positioning toothed rings for maintaining the stable connection of the flow tube head. The inner side of the inner positioning toothed rings is provided with a limiting groove for double-sided positioning engagement. The inner side of the limiting groove is provided with a set of inner positioning toothed rings for maintaining the locking engagement of the connecting boss and the connecting concave seat. The inner positioning toothed rings one and two are arranged opposite to each other. The inner side of the inner positioning toothed rings two is provided with a flow tube head for flowing the server heat dissipation coolant into the tube body two. The connecting boss and the engagement seat are positioned and fitted together. First, the outer cover of the connecting boss is aligned with the corresponding structure of the engagement seat. The initial positioning fit is achieved by the outer positioning teeth, so that the positioning structure of the outer cover and the engagement seat is precisely fitted together. Next, push the connecting boss and the meshing seat closer to each other. The sealing plug seat on the inner side of the inner flywheel plate deforms due to compression, tightly fitting the connecting surface to form an initial seal. Then, let the corresponding tooth structure of the inner positioning tooth ring one and the meshing seat embed into the limiting groove. The inner positioning tooth ring two and the locking structure of the meshing seat mesh against each other to achieve double positioning and locking. The flow pipe head is precisely aligned with the flow channel of the pipe body two. After completing the assembly of the connecting boss and the meshing seat, connect each set of sheet metal pipes to the radiator body to form a complete heat dissipation circuit.

[0007] In a preferred embodiment, the engagement seat includes an outer sealing plate and an inner positioning tooth wall. The outer side of the engagement seat is provided with a set of outer sealing plates for sealing against the rear side of the outer cover. The outer sealing plate is made of rubber material. The inner front end of the outer sealing plate is provided with a set of outer engagement tooth grooves to maintain the positioning of the inner sealing plate. The outer engagement tooth grooves mesh with the outer positioning teeth. The outer side of the outer engagement tooth grooves is provided with a set of inner sealing plates for sealing against the inner side of the outer cover. The outer engagement tooth grooves and the inner side of the inner sealing plate are integrally formed. The front side of the inner sealing plate is provided with a set of positioning tooth rings for maintaining the positioning of the connecting boss. The positioning tooth rings are connected and fixed to the inner sealing plate. The inner side of the positioning tooth rings is provided with a set of inner sealing ring plugs to improve the sealing effect between the connecting boss and the engagement seat.

[0008] In a preferred embodiment, the inner sealing ring plug has a convex-concave structure. When the inner flywheel and the positioning toothed ring are engaged, the inner sealing ring plug and the sealing plug seat are sealed and fitted together. The inner sealing ring plug is disposed inside the positioning groove. A set of sealing teeth is provided on the front side of the inner sealing ring plug for engaging with the inner and outer sides of the limiting groove. The sealing teeth engage and lock with the first inner positioning toothed ring. The left side of the sealing teeth has a circular cross-section. A set of inner positioning tooth walls is provided on the inner side of the sealing teeth for engaging with the second inner positioning toothed ring. The inner positioning tooth walls are integral with the sealing teeth. An embedded groove is formed on the inner side of the inner positioning tooth walls. A set of materials for conducting server cooling fluid is provided on the rear side of the sealing teeth. When the meshing seat and the connecting boss are fully engaged, the flow tube head extends into the cavity. The cavity is located inside the second tube body. First, align the connecting boss and the meshing seat so that the outer positioning teeth of the outer cover and the outer meshing tooth groove of the meshing seat are precisely engaged. The outer sealing plate and the rear side of the outer cover are tightly fitted to form the first seal, pushing the two closer together. The inner sealing plate and the inner side of the outer cover are fitted to enhance the sealing performance. The positioning tooth ring and the inner flywheel of the connecting boss are mutually positioned. The inner sealing ring plug and the sealing plug seat are squeezed and fitted together, forming a double seal using the convex and concave structure. At the same time, the sealing head is embedded in the limiting groove and meshes with the inner positioning tooth ring one. The inner positioning tooth wall and the inner positioning tooth ring two are precisely docked and meshed to achieve multiple positioning and fixation. The flow tube head extends smoothly into the cavity to ensure smooth flow.

[0009] In a preferred embodiment, the second tube includes an inner inlet tube head and an inner outlet tube head. The right side of the inner inlet tube head is provided with a set of inner tubes for guiding and uniformly dissipating the server cooling fluid. The inner tube is made of stainless steel. The left and right sides of the inner tube are respectively provided with a set of external heat-conducting seats for actively dissipating the server cooling fluid. The two sets of external heat-conducting seats respectively wrap around and contact the outer sides of the left and right ends of the inner tube body. The interior of the inner inlet pipe head is connected to the interior of the inner tube body. Several sets of external heat-conducting strips for dissipating heat are evenly distributed on the outer side of the inner tube body. The several sets of external heat-conducting strips are evenly distributed on the outer side of the two sets of external heat-conducting seats. At the same time, the several sets of external heat-conducting strips are positioned and embedded with the two sets of external heat-conducting seats and contact the outer surface of the inner tube body. An inner outlet pipe head for transmitting and exporting server heat dissipation coolant is provided on the right side of the inner tube body.

[0010] In a preferred embodiment, the inner tube includes a heat dissipation tube and an inner core rod. The left side of the heat dissipation tube is provided with a set of side sealing seats to maintain the sealing effect on the left side. The center position on the left side of the side sealing seat is provided with a set of inlet cones for introducing server cooling fluid from inside the flow tube head. Inside the heat dissipation tube is a set of spiral heat dissipation fins for increasing the contact area of ​​server cooling fluid. The spiral heat dissipation fins are spiral structures, and the cross-sectional length of the spiral heat dissipation fins is the same as the cross-sectional length of the heat dissipation tube. The spiral heat dissipation fins are made of stainless steel, and the inner side of the spiral heat dissipation fins is provided with a heat dissipation flow limiting ring for guiding server cooling fluid in a spiral path.

[0011] In a preferred embodiment, the outer side of the spiral heat sink is in close contact with the inner wall of the heat pipe. The inner side of the spiral heat sink has several sets of flow equalization channels for evenly distributing the server coolant and maintaining a stable flow rate. A set of inner core rods for maintaining the stability of the spiral heat sink is located at its center. A set of side sealing seats two for maintaining the seal at its right end is located on the right side of the heat pipe. A set of outflow cones for discharging the server coolant is located at the middle right side of the side sealing seats two. Flow channels are formed inside both the outflow cones and the inflow cones. A limiting ring is formed inside the outflow cones, inside the inflow cones, and within the heat dissipation flow channels. The internal components are interconnected. First, the inner inlet pipe of tube body two is connected to the flow pipe of the connecting boss, and the inner outlet pipe is connected to the corresponding channel of the heat sink body to ensure that the side sealing seat one and the side sealing seat two are respectively in contact with the sealing mating surface. The coolant is introduced into the heat sink of the inner tube body through the inlet cone, and after being evenly distributed through the flow equalization channel, it enters the heat dissipation flow limiting ring of the spiral heat sink. When flowing along the spiral path, it fully contacts the inner wall of the heat sink and the spiral heat sink. The heat is conducted through the inner tube body to the outer heat conduction seat and the outer heat conduction strip, and is quickly dissipated to the outside. The coolant after absorbing heat is discharged through the outlet cone and the inner outlet pipe, completing one heat dissipation cycle and continuously removing heat from the server.

[0012] A welding process for sheet metal manifolds in a server water-cooled radiator includes the following steps: S1: Before welding, assembly positioning and cleaning and protection work must be completed. The connecting boss and the meshing seat must be fully engaged to ensure that the outer cover and the outer sealing plate fit tightly and the inner flywheel and the positioning tooth ring are precisely engaged to ensure that the whole is coaxial without gaps or misalignment. Then, the welding groove is thoroughly cleaned to remove oil, oxide scale and coolant residue. The surface of the concave welding groove is wiped with anhydrous ethanol to ensure that the welding area is clean. At the same time, in order to protect the internal flexible rubber sealing plug and the inner sealing ring, a high-temperature heat-insulating film or ceramic fiber paper must be pasted on the inside of the flow groove to avoid the welding heat conduction causing the seal to burn and be damaged. S2: Based on the structural characteristics and material requirements of the sheet metal manifold, determine the core welding parameters and special welding materials. Select ER308L low-carbon austenitic stainless steel solid welding rod with a specification of Φ1.0mm or Φ1.2mm to meet the welding requirements of concave narrow grooves. The welding method is TIG tungsten inert gas welding. Set the DC positive current to 15A~25A and the argon gas protection flow rate to 6~8L / min. Select WC20 Φ2.0mm tungsten electrode and strictly control the penetration depth to only fuse the side wall of the weld groove to avoid penetrating the inner wall and damaging the internal structure. S3: A step-by-step welding method is adopted to ensure weld quality. First, spot welding is performed to position the weld, with 3 to 4 weld points evenly distributed along the annular welding groove. The welding time for each weld point is controlled at 0.5 seconds to prevent the assembly from rotating and misaligning. Then, continuous circumferential welding is performed. The welding torch is held and moved slightly along the concave welding groove at a uniform speed to control the weld width at 2 to 3 mm to ensure that the weld bead is uniform and full, without defects such as undercut or porosity. At the same time, the welding material is ensured to completely fill the concave groove. After welding, the workpiece is placed in a ventilated place for natural air cooling. Water cooling is strictly prohibited to avoid stress cracking caused by sudden temperature changes. S4: After welding, the product must pass multiple tests to confirm its qualification. First, a visual inspection is carried out to observe whether the weld is continuous and complete, without surface defects such as cracks, burn-through, or incomplete penetration. Then, an airtightness test is carried out by introducing gas at a pressure of 0.6-0.8 MPa into the flow channel and holding the pressure for 30 minutes. The weld is checked for leakage by observing with a pressure gauge and applying soapy water. Finally, a flow check is carried out using a special diameter tester or fluid tester to confirm that there is no deformation or blockage in the internal flow channel, ensuring that the server's heat dissipation coolant can be smoothly conducted. Only after all indicators meet the standards can the product be judged as qualified.

[0013] After adopting the above technical solution, the beneficial effects of the present invention are: by using the pipe body one and pipe body two to be aligned and fitted by connecting protrusion and meshing seat, a complete coolant circulation channel can be quickly built to ensure smooth coolant conduction without leakage, effectively improve heat dissipation efficiency, ensure stable operation of the server, and at the same time simplify the installation steps, reduce the difficulty of operation, and extend the service life of the equipment. By using a multi-positioning structure to ensure connection accuracy, a flexible sealing plug seat to significantly improve sealing performance and prevent coolant leakage, and a double toothed ring meshing to enhance connection stability, the assembly process is convenient and efficient, achieving a stable connection without complicated operations, effectively improving the sealing and reliability of the heat dissipation system, further ensuring server heat dissipation efficiency, and extending equipment lifespan; By using multiple sets of toothed meshing to ensure precise and stable connection, and the multi-layer sealing structure working together to prevent coolant leakage, the assembly process requires no complicated tools, making operation convenient and efficient. This effectively improves the sealing and structural stability of the heat dissipation system, ensuring smooth coolant conduction, thereby improving server heat dissipation efficiency, extending the overall service life of the equipment, and reducing maintenance costs. By using spiral heat sinks and equal flow channels, the contact area of ​​the coolant is increased and a stable flow rate is maintained. External heat conduction bases and external heat conduction strips enhance heat dissipation. Stainless steel material ensures structural durability. Multiple sealing designs prevent leakage. Overall, the heat dissipation efficiency is high and the operation is stable. It can continuously and quickly remove server heat, ensuring long-term high-efficiency operation of the equipment. It is also easy to assemble and connect, and has low maintenance costs.

[0014] After adopting the above technical solution, the beneficial effects of this process are as follows: through standardized pre-cleaning and protection and precise assembly, combined with appropriate welding parameters and step-by-step welding methods, the quality of the weld and the integrity of the internal structure are guaranteed. Multiple inspection links prevent unqualified products from entering the market, effectively improving the sealing performance, structural stability and durability of sheet metal manifolds, so as to ensure the safe and reliable operation of the heat dissipation system, while reducing the welding defect rate and reducing the later maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the sheet metal manifold structure of a server water-cooled radiator according to the present invention; Figure 2 This is a top view of the left front side of the sheet metal pipe body after welding is completed in the sheet metal manifold of a server water cooling radiator according to the present invention. Figure 3 This is a top view of the outer casing, meshing connector, and pipe body two in a sheet metal manifold of a server water-cooled radiator according to the present invention. Figure 4 This is a schematic diagram of the right side view of the connecting boss in the sheet metal manifold of a server water-cooled radiator according to the present invention. Figure 5 This is a schematic diagram of the left oblique front side view of the meshing joint in the sheet metal manifold of a server water-cooled radiator according to the present invention. Figure 6 This is a front view schematic diagram of the welding groove in the sheet metal manifold of a server water-cooled radiator according to the present invention. Figure 7 This is a top view of the left oblique side of the internal structure of the second tube body in the sheet metal manifold of a server water-cooled radiator according to the present invention. Figure 8 This is a top view of the inner tube body on the right oblique side of a sheet metal manifold in a server water-cooled radiator according to the present invention. Figure 9This is a top view of the left oblique side of the spiral heat sink in the sheet metal manifold of a server water-cooled radiator according to the present invention. Figure 10 This is a schematic diagram of the right side view of the spiral heat sink and the heat dissipation flow limiting ring in the sheet metal manifold of a server water-cooled radiator according to the present invention. In the diagram: 1-Sheet metal pipe body, 2-Radiator body; 11-Pipe body one, 12-Connecting boss, 13-Welding groove, 14-Outer cover, 15-Pipe body two, 16-Meshing joint; 12a-Outer cover, 12b-Outer positioning tooth, 12c-Inner flywheel, 12d-Inner limiting ring, 12e-Sealing plug seat, 12f-Inner positioning tooth ring one, 12g-Limiting groove, 12h-Inner positioning tooth ring two, 12i-Flow tube head; 16a-Outer sealing plate, 16b-Outer meshing tooth groove, 16c-Inner sealing plate, 16d-Positioning tooth ring, 16e-Positioning groove, 16f-Inner sealing ring plug, 16g-Sealing head, 16h-Inner groove, 16i-Inner positioning tooth wall; 15a-Inner inlet pipe head, 15b-Outer heat conduction base, 15c-Inner pipe body, 15d-Outer heat conduction strip, 15e-Inner outlet pipe head; c1-Heat pipe, c2-Side seal seat one, c3-Inlet cone, c4-Outlet cone, c5-Side seal seat two, c6-Spiral heat sink, c7-Inner limit ring for heat dissipation and flow, c8-Flow equalization channel, c9-Inner core rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-10 As a first embodiment of the present invention, a sheet metal manifold for a server water cooling radiator includes: a sheet metal pipe body 1 for conducting server cooling fluid and a radiator body 2 for collecting server cooling fluid. The sheet metal pipe body 1 is provided in several groups, and the several groups of sheet metal pipe bodies 1 are of the same specification. Each of the several groups of sheet metal pipe bodies 1 is provided with a radiator body 2 on both the left and right sides for collecting and circulating server cooling fluid. The sheet metal tube body 1 includes a tube body 11 and a meshing seat 16. The right side of the tube body 11 is provided with a set of connecting bosses 12 for sealing connection with the tube body 2 15. The right side of the connecting bosses 12 is provided with a set of meshing seats 16 for sealing meshing connection with them. The outer side of the meshing seats 16 is provided with a set of outer covers 14 for connecting the connecting bosses 12 to the cover. The left side of the outer cover 14 is an embedded arc structure, and the right side of the connecting bosses 12 is a circular structure. The cross-sectional diameter of the right side of the connecting bosses 12 is smaller than the cross-sectional diameter of the inner side of the left end of the outer cover 14. The right side of the connecting boss 12 and the inner side of the outer casing 14 are fitted together, and a set of welding grooves 13 are formed on the outer side of the fitting position to facilitate welding and fixing by the workers. The inner side of the cross-section of the welding groove 13 is a concave structure. The tube body 11 and the connecting boss 12 are an integral structure, and the tube body 15, the engagement seat 16, and the outer casing 14 are an integral structure. The internal structure of the tube body 11 and the tube body 15 is the same, and both have internal flow channels for conducting server heat dissipation coolant. The internal structure of the tube body 11 and the tube body 15 are interconnected. First, the tube body 11 and the tube body 15 of the sheet metal manifold of the server water cooling radiator are aligned and attached by the connecting boss 12 and the engagement seat 16, and the outer casing is used to... The left-side embedded arc structure and the right-side circular structure of the connecting protrusion 12 fit together to form a sealed connection. The welding groove 13 on the outside of the fitting provides convenience for fixing. The welding process completes the stable connection between the first tube 11 and the second tube 15 to ensure smooth flow of the inner channel. Then, several sets of sheet metal tubes 1 with the same specifications are arranged as required, and their left and right sides are respectively connected to the corresponding heat sink body 2, so that the sheet metal tubes 1 and the heat sink body 2 form a complete coolant conduction and collection circuit. After the server cooling system is started, the coolant enters the inner channel of the sheet metal tube 1 through the heat sink body 2, conducts smoothly between the tubes, absorbs the server heat, and then flows back to the heat sink body 2 to complete the circulation and achieve continuous heat dissipation.

[0019] Please see Figures 1-4 As a second embodiment of the present invention: based on the description in the first embodiment, the connecting boss 12 includes an outer cover 12a and a flow tube head 12i. The inner side of the outer cover 12a is provided with a set of outer positioning teeth 12b for positioning with the outer meshing tooth groove 16b. The outer cover 12a and the outer positioning teeth 12b are integrated into one structure. The inner side of the outer positioning teeth 12b is provided with a set of inner flywheel disks 12c. The inner side of the inner flywheel disks 12c is provided with an inner limiting ring 12d. The inner side of the inner limiting ring 12d is provided with a set of sealing plugs 12e for improving the connection sealing effect. The sealing plugs 12e are made of a flexible rubber material.

[0020] The inner side of the sealing plug seat 12e is provided with a set of inner positioning toothed rings 12f to keep the connection of the flow pipe head 12i stable. The inner side of the inner positioning toothed ring 12f is provided with a limiting groove 12g for double-sided positioning engagement. The inner side of the limiting groove 12g is provided with a set of inner positioning toothed rings 12h to keep the connecting boss 12 and the connecting concave seat locked in engagement. The inner positioning toothed rings 12f and 12h are arranged opposite to each other. The inner side of the inner positioning toothed ring 12h is provided with a set of cooling devices for the server. The flow tube head 12i, which allows the coolant to flow into the inner tube body 15, is connected to the connecting boss 12 and the engaging seat 16 for mutual positioning and fitting. An annular shape memory metal spring is embedded inside the sealing plug seat 12e, and a miniature pressure relief channel is formed at the convex-concave structure of the inner sealing ring plug 16f. The deformation temperature of the shape memory metal spring is adapted to the operating temperature of the server coolant (40-60℃). The miniature pressure relief channel communicates with the flow channel of the flow tube head 12i, with a channel width of 0.1-0.3mm and a depth of 0.2m. m, the miniature pressure relief channel can guide the local high-pressure coolant on the sealing surface to the flow channel, preventing the high pressure from breaking the sealing surface and achieving dynamic pressure adaptive sealing. First, align the outer cover 12a of the connecting boss 12 with the corresponding structure of the meshing seat 16. The outer positioning tooth 12b achieves initial positioning and fitting, so that the positioning structure of the outer cover 12a and the meshing seat 16 are precisely fitted. Then, push the connecting boss 12 and the meshing seat 16 closer to each other, and the sealing plug seat 12e inside the inner flywheel disk 12c. Due to the deformation caused by compression, the tight fit between the joint surfaces forms an initial seal. Then, the corresponding tooth structure of the inner positioning tooth ring 12f and the meshing seat 16 is embedded into the limiting groove 12g. The inner positioning tooth ring 12h and the locking structure of the meshing seat 16 mesh with each other to achieve double positioning and locking. The flow pipe head 12i is precisely aligned with the flow channel of the pipe body 15. After the assembly of the connecting boss 12 and the meshing seat 16 is completed, each set of sheet metal pipe bodies 1 is connected to the radiator body 2 to form a complete heat dissipation circuit.

[0021] Please see Figures 1-6As a third embodiment of the present invention: based on the description in the first and second embodiments, the meshing seat 16 includes an outer sealing plate 16a and an inner positioning tooth wall 16i. A set of outer sealing plates 16a is provided on the outer side of the meshing seat 16 for sealing and fitting with the rear side of the outer cover 12a. The outer side of the outer sealing plate 16a is made of rubber material. A set of outer meshing tooth grooves 16b is provided on the inner side of the front end of the outer sealing plate 16a to maintain the positioning of the inner sealing plate 16c. The outer meshing tooth grooves 16b mesh with the outer positioning teeth 12b. The outer side of the meshing groove 16b is provided with an inner sealing plate 16c for sealing and fitting with the inner side of the outer cover 12a. The outer meshing groove 16b and the inner side of the inner sealing plate 16c are integrally formed. The front side of the inner sealing plate 16c is provided with a positioning tooth ring 16d for maintaining the positioning of the connecting boss 12. The positioning tooth ring 16d is connected and fixed to the inner sealing plate 16c. The inner side of the positioning tooth ring 16d is provided with an inner sealing ring plug 16f for improving the sealing effect of the connection between the connecting boss 12 and the meshing seat 16.

[0022] The inner sealing ring plug 16f has a convex-concave structure. When the inner flywheel disk 12c and the positioning tooth ring 16d are mutually positioned and engaged, the inner sealing ring plug 16f and the sealing plug seat 12e are sealed and fitted together. The inner sealing ring plug 16f is set inside the positioning groove 16e. The front side of the inner sealing ring plug 16f is provided with a set of sealing heads 16g for mutual engagement and positioning with the inner and outer sides of the limiting groove 12g. The sealing heads 16g are mutually engaged and locked with the inner positioning tooth ring 12f. The left side of the sealing head 16g has a circular cross-section. The inner side of the sealing head 16g is provided with a set of inner positioning tooth walls 16i for mutual engagement and positioning with the inner positioning tooth ring 12h. The inner positioning tooth walls 16i and the sealing head 16g are an integral structure. The inner side of the inner positioning tooth walls 16i is provided with an inner groove 16h. The rear side of the sealing head 16g is provided with a set of tubes for conducting server heat dissipation coolant. When the engagement seat 16 and the connecting boss 12 are fully engaged... When fully engaged, the flow tube head 12i extends into the cavity, which is located within the tube body 15. First, the connecting boss 12 and the engagement seat 16 are aligned, ensuring precise engagement between the outer positioning teeth 12b of the outer cover 12a and the outer engagement groove 16b of the engagement seat 16. The outer sealing plate 16a and the rear side of the outer cover 12a are tightly fitted together to form the first seal. This pushes the two closer together, and the inner sealing plate 16c fits against the inner side of the outer cover 12a to enhance the seal and position the outer cover. The toothed ring 16d and the inner flywheel disk 12c of the connecting boss 12 are positioned to each other. The inner sealing ring plug 16f and the sealing plug seat 12e are squeezed and fitted together, forming a double seal by using the convex and concave structure. At the same time, the sealing head 16g is embedded in the limiting groove 12g and engages and locks with the inner positioning toothed ring 12f. The inner positioning tooth wall 16i and the inner positioning toothed ring 12h are precisely docked and engaged to achieve multiple positioning and fixation. The flow tube head 12i extends smoothly into the cavity to ensure smooth flow.

[0023] Please see Figures 1-10As a fourth embodiment of the present invention: based on the description in the third embodiment, the tube body 15 includes an inner inlet pipe head 15a and an inner outlet pipe head 15e. The inner inlet pipe head 15a is provided with a set of inner tube bodies 15c on the right side for guiding and uniformly dissipating the server heat dissipation coolant. The inner tube body 15c is made of stainless steel. The left and right sides of the inner tube body 15c are respectively provided with a set of outer heat conduction seats 15b for actively dissipating the server heat dissipation coolant. A micro-nano oxide ceramic coating with a thickness of 5-8 μm is applied to the stainless steel substrate surface of the inner tube body 15c. The outer heat-conducting strip 15d is made of copper-aluminum composite material, and micron-level thermally conductive grooves are opened on the contact surface between the outer heat-conducting strip and the inner tube body. The grooves are filled with high thermal conductivity silicone grease (thermal conductivity ≥8 W / (m・K)). The micro-nano oxide ceramic coating not only ensures the corrosion resistance of the stainless steel tube body, but also improves its surface thermal conductivity, while enhancing the wettability between the coolant and the tube body. The copper-aluminum composite outer heat-conducting strip balances thermal conductivity and lightweight design. The micron-level thermally conductive grooves and high thermal conductivity silicone grease eliminate air gaps at the contact surface, reducing heat conduction loss by 60%. As described above, the two sets of external heat-conducting seats 15b respectively wrap around and contact the outer sides of the left and right ends of the inner tube body 15c. The interior of the inner inlet pipe head 15a is connected to the interior of the inner tube body 15c. Several sets of external heat-conducting strips 15d are evenly distributed on the outer side of the inner tube body 15c to dissipate its heat. The several sets of external heat-conducting strips 15d are evenly distributed on the outer side of the two sets of external heat-conducting seats 15b. At the same time, the several sets of external heat-conducting strips 15d are mutually positioned and embedded with the two sets of external heat-conducting seats 15b and contact the outer surface of the inner tube body 15c. An inner outlet pipe head 15e is provided on the right side of the inner tube body 15c for transmitting and exporting the server heat dissipation coolant.

[0024] The inner tube body 15c includes a heat dissipation tube c1 and an inner core rod c9. A set of side sealing seats c2 is provided on the left side of the heat dissipation tube c1 to maintain the sealing effect on the left side. A set of inlet cones c3 is provided at the center of the left side of the side sealing seats c2 to introduce the server heat dissipation coolant from the inside of the flow tube head 12i. A set of spiral heat dissipation fins c6 is provided inside the heat dissipation tube c1 to increase the contact area of ​​the server heat dissipation coolant. The spiral heat dissipation fins c6 are spiral structures, and the cross-sectional length of the spiral heat dissipation fins c6 is the same as the cross-sectional length of the heat dissipation tube c1. The spiral heat dissipation fins c6 are made of stainless steel, and a heat dissipation flow limiting ring c7 is provided on the inner side of the spiral heat dissipation fins c6 to guide the server heat dissipation coolant in a spiral path.

[0025] The outer side of the spiral heat sink c6 is in close contact with the inner wall of the heat pipe c1. Several sets of flow equalization channels c8 are formed on the inner side of the spiral heat sink c6 to evenly distribute the server's coolant and maintain a stable flow rate. The spiral heat sink c6 has a variable pitch gradient structure; the pitch at the inlet cone c3 is 8-10mm, and the pitch at the outlet cone c4 is 3-5mm. The heat dissipation flow limiting ring c7 is a variable diameter groove, with a groove width of 8mm at the inlet end, gradually narrowing to 4mm at the outlet end along the coolant flow direction. The outlet of the flow equalization channels c8 has an arc-shaped guide chamfer. When the coolant flows, the variable pitch and variable diameter flow-limiting ring 12d slows down the coolant flow rate at the inlet (high heat zone), increasing the contact time with the heat sink. At the outlet (low heat zone), the flow rate increases, preventing localized temperature rise caused by coolant stagnation. The arc-shaped flow guide chamfer eliminates fluid vortices at the outlet of the flow equalization channel, ensuring smooth coolant flow without localized blockage. A set of inner core rods c9 is located at the center of the spiral heat sink c6 to maintain its stability. A set of side seals is located on the right side of the heat pipe c1 to maintain its right-end seal. Side sealing seat c5, with a set of outflow cones c4 located in the middle of the right side for draining server heat dissipation coolant, has flow channels inside both the outflow cone c4 and the inflow cone c3. The interiors of the outflow cone c4, the inflow cone c3, and the heat dissipation flow limiting ring c7 are all interconnected. First, the inner inflow pipe head 15a of the second pipe body 15 is connected to the flow pipe head 12i of the connecting protrusion 12, and the inner outflow pipe head 15e is connected to the corresponding channel of the heat sink body 2 to ensure that the side sealing seat c2 and the side sealing seat c5 are separated. Without touching the sealing mating surface, the coolant is introduced into the heat dissipation pipe c1 of the inner tube body 15c through the inlet cone c3. After being evenly distributed through the flow equalization channel c8, it enters the heat dissipation flow limiting ring c7 of the spiral heat sink c6. When flowing along the spiral path, it fully contacts the inner wall of the heat dissipation pipe c1 and the spiral heat sink c6. The heat is conducted through the inner tube body 15c to the outer heat conduction seat 15b and the outer heat conduction strip 15d, and is quickly dissipated to the outside. The coolant that has absorbed heat is discharged through the outlet cone c4 and the inner outlet pipe head 15e, completing one heat dissipation cycle and continuously removing heat from the server.

[0026] A welding process for sheet metal manifolds of a server water-cooled radiator includes the following steps: S1: Before welding, assembly positioning and cleaning and protection work must be completed. The connecting boss 12 and the meshing seat 16 are fully engaged to ensure that the outer cover 12a and the outer sealing plate 16a fit tightly and the inner flywheel 12c and the positioning tooth ring 16d are precisely engaged to ensure that the whole is coaxial without gaps or misalignment. Then, the welding groove 13 is thoroughly cleaned to remove oil, oxide scale and coolant residue. The surface of the concave welding groove 13 is wiped with anhydrous ethanol to ensure that the welding area is clean. At the same time, in order to protect the internal flexible rubber sealing plug seat 12e and the inner sealing ring plug 16f, a high temperature heat-resistant heat insulation film or ceramic fiber paper is pasted on the inside of the flow groove to avoid the welding heat conduction causing the seal to burn and be damaged. S2: Based on the structural characteristics and material requirements of the sheet metal manifold, determine the core welding parameters and special welding materials. Select ER308L low-carbon austenitic stainless steel solid welding rod with a specification of Φ1.0mm or Φ1.2mm to meet the welding requirements of concave narrow grooves. The welding method is TIG tungsten inert gas welding. Set the DC positive current to 15A~25A and the argon gas protection flow rate to 6~8L / min. Select WC20 Φ2.0mm tungsten electrode and strictly control the penetration depth to only fuse the side wall of the groove to avoid melting through the inner wall and damaging the internal structure. S3: A step-by-step welding method is adopted to ensure the quality of the weld. First, spot welding is performed to position the weld. 3 to 4 welding points are evenly distributed along the annular welding groove 13. The welding time for each welding point is controlled within 0.5 seconds to prevent the assembly from rotating and misaligning. Then, continuous circumferential welding is performed. The welding torch is held and swung slightly along the concave welding groove 13 at a constant speed to control the weld width within 2 to 3 mm to ensure that the weld bead is uniform and full, without defects such as undercut or porosity. At the same time, the welding material is ensured to completely fill the concave groove. After welding, the workpiece is placed in a ventilated place to air cool naturally. Water cooling is strictly prohibited to avoid stress cracking caused by sudden temperature changes. S4: After welding, the product must pass multiple tests to confirm its qualification. First, a visual inspection is carried out to observe whether the weld is continuous and complete, without surface defects such as cracks, burn-through, or incomplete penetration. Then, an airtightness test is carried out by introducing gas at a pressure of 0.6-0.8 MPa into the flow channel and holding the pressure for 30 minutes. The weld is checked for leakage by observing with a pressure gauge and applying soapy water. Finally, a flow check is carried out using a special diameter tester or fluid tester to confirm that there is no deformation or blockage in the internal flow channel, ensuring that the server's heat dissipation coolant can be smoothly conducted. Only after all indicators meet the standards can the product be judged as qualified.

[0027] First, complete the precise meshing assembly of the connecting boss 12 and the meshing seat 16 to ensure a tight fit without gaps and coaxial alignment without misalignment. Thoroughly clean impurities from the welding groove 13 and wipe it clean. Apply high-temperature resistant protective material to the inside of the flow channel to protect the internal seals. Then, select suitable welding materials and welding equipment, set the corresponding welding parameters, and use TIG welding. First, evenly spot weld along the annular welding groove 13 for positioning, and then perform continuous annular welding at a uniform speed, controlling the weld width and weld quality to avoid defects. After welding, allow it to air cool naturally. Finally, conduct visual inspection, air tightness test, and flow inspection in sequence to confirm that the weld is free of defects and leaks and that the internal flow channels are smooth. After all indicators meet the standards, the welding process is completed, thereby ensuring the high efficiency of the server water-cooled radiator sheet metal manifold in terms of heat dissipation and flow guidance.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sheet metal manifold for a server water-cooled radiator, comprising: The sheet metal pipe (1) for conducting server heat dissipation coolant and the heat sink body (2) for collecting server heat dissipation coolant are characterized in that: the sheet metal pipe (1) is provided in several groups, the several groups of sheet metal pipe (1) are of the same specification, and the several groups of sheet metal pipe (1) are provided with a heat sink body (2) for collecting and circulating server heat dissipation coolant on both the left and right sides. The sheet metal tube body (1) includes a tube body one (11) and a meshing seat (16). The right side of the tube body one (11) is provided with a set of connecting bosses (12) for sealing connection with the tube body two (15). The right side of the connecting bosses (12) is provided with a set of meshing seats (16) for sealing meshing connection with them. The outer side of the meshing seat (16) is provided with a set of outer shells (14) for connecting the connecting bosses (12) to the cover. The left side of the outer shell (14) is an embedded arc structure, and the right side of the connecting bosses (12) is a circular structure. The cross-sectional diameter of the right side of the connecting bosses (12) is smaller than the cross-sectional diameter of the inner side of the left end of the outer shell (14). The right side of the connecting boss (12) is fitted into the inner side of the outer shell (14), and a set of welding grooves (13) are formed on the outer side of the fitting position to facilitate welding and fixing by the staff. The inner side of the cross-section of the welding groove (13) is a concave structure. The tube body one (11) and the connecting boss (12) are an integral structure. The tube body two (15) and the meshing seat (16) and the outer shell (14) are an integral structure. The internal structure of the tube body one (11) is the same as that of the tube body two (15), and both are provided with internal flow channels for conducting server heat dissipation coolant. The internal structure of the tube body one (11) and the internal structure of the tube body two (15) are interconnected.

2. The sheet metal manifold for a server water-cooled radiator according to claim 1, characterized in that: The connecting boss (12) includes an outer cover (12a) and a flow tube head (12i). The inner side of the outer cover (12a) is provided with a set of outer positioning teeth (12b) for positioning with the outer meshing tooth groove (16b). The outer cover (12a) and the outer positioning teeth (12b) are integrated. The inner side of the outer positioning teeth (12b) is provided with a set of inner flywheel discs (12c). The inner side of the inner flywheel discs (12c) is provided with an inner limiting ring (12d). The inner side of the inner limiting ring (12d) is provided with a set of sealing plugs (12e) for improving the connection sealing effect. The sealing plugs (12e) are made of a flexible rubber material.

3. The sheet metal manifold for a server water-cooled radiator according to claim 2, characterized in that: The inner side of the sealing plug seat (12e) is provided with a set of inner positioning toothed rings (12f) for maintaining the connection stability of the flow tube head (12i). The inner side of the inner positioning toothed ring (12f) is provided with a limiting groove (12g) for double-sided positioning engagement. The inner side of the limiting groove (12g) is provided with a set of inner positioning toothed rings (12h) for maintaining the locking engagement of the connecting boss (12) and the connecting concave seat. The inner positioning toothed rings (12f) and (12h) are arranged opposite to each other. The inner side of the inner positioning toothed rings (12h) is provided with a set of flow tube heads (12i) for guiding the server heat dissipation coolant into the tube body (15). The connecting boss (12) and the engagement seat (16) are mutually positioned and fitted. An annular memory metal spring is embedded in the sealing plug seat (12e), and a micro pressure relief guide groove is opened at the convex concave structure of the inner sealing ring plug (16f).

4. The sheet metal manifold for a server water-cooled radiator according to claim 3, characterized in that: The engagement seat (16) includes an outer sealing plate (16a) and an inner positioning tooth wall (16i). The outer side of the engagement seat (16) is provided with a set of outer sealing plates (16a) for sealing against the rear side of the outer cover (12a). The outer side of the outer sealing plate (16a) is made of rubber material. The inner front end of the outer sealing plate (16a) is provided with a set of outer engagement tooth grooves (16b) for maintaining the positioning of the inner sealing plate (16c). The outer engagement tooth grooves (16b) mesh with the outer positioning teeth (12b). The outer side of the outer engagement tooth grooves (16b) is provided with… A set of inner sealing plates (16c) for sealing and fitting the inner side of the outer cover (12a). The outer meshing groove (16b) and the inner side of the inner sealing plate (16c) are integrally structured. The front side of the inner sealing plate (16c) is provided with a set of positioning toothed rings (16d) for maintaining the positioning of the connecting boss (12). The positioning toothed rings (16d) are connected and fixed to the inner sealing plate (16c). The inner side of the positioning toothed rings (16d) is provided with a set of inner sealing ring plugs (16f) for improving the sealing effect of the connection between the connecting boss (12) and the meshing seat (16).

5. The sheet metal manifold for a server water-cooled radiator according to claim 4, characterized in that: The inner sealing ring plug (16f) has a convex-concave structure. When the inner flywheel disc (12c) and the positioning toothed ring (16d) are mutually positioned and engaged, the inner sealing ring plug (16f) and the sealing plug seat (12e) are sealed and fitted together. The inner sealing ring plug (16f) is located inside the positioning groove (16e). A set of sealing heads (16g) is provided on the front side of the inner sealing ring plug (16f) for mutually engaging and positioning with the inner and outer sides of the limiting groove (12g). The sealing heads (16g) are mutually engaged and locked with the inner positioning toothed ring (12f). The left side of the sealing head (16g) is shown in cross-section as follows: A circular structure is provided, wherein the inner side of the sealing head (16g) is provided with a set of inner positioning tooth walls (16i) for mutual positioning and meshing with the inner positioning tooth ring two (12h), the inner positioning tooth wall (16i) and the sealing head (16g) are integral structures, the inner side of the inner positioning tooth wall (16i) is provided with an embedded groove (16h), and the rear side of the sealing head (16g) is provided with a set of cavities for conducting server heat dissipation coolant. When the meshing seat (16) and the connecting boss (12) are fully meshed, its flow pipe head (12i) extends into the cavity, and its cavity is located in the tube body two (15).

6. The sheet metal manifold for a server water-cooled radiator according to claim 5, characterized in that: The second tube (15) includes an inner inlet tube head (15a) and an inner outlet tube head (15e). The inner inlet tube head (15a) is provided with a set of inner tube bodies (15c) on the right side for guiding and uniformly dissipating the server heat dissipation coolant. The inner tube body (15c) is made of stainless steel. The inner tube body (15c) is provided with a set of outer heat conduction seats (15b) on the left and right sides for actively dissipating the server heat dissipation coolant. A micro-nano oxide ceramic coating with a thickness of 5-8 μm is applied to the stainless steel substrate surface of the inner tube (15c). Two sets of external heat-conducting seats (15b) respectively wrap around and contact the outer sides of the left and right ends of the inner tube (15c). The interior of the inner inlet pipe head (15a) is interconnected with the interior of the inner tube (15c). Several sets of external heat-conducting strips (15d) for dissipating heat are evenly distributed on the outer side of the inner tube (15c). Several sets of external heat-conducting strips (15d) are evenly distributed on the outer side of the two sets of external heat-conducting seats (15b). At the same time, several sets of external heat-conducting strips (15d) are mutually positioned and embedded with the two sets of external heat-conducting seats (15b) and contact the outer surface of the inner tube (15c). An inner outlet pipe head (15e) for transmitting and exporting server heat dissipation coolant is provided on the right side of the inner tube (15c).

7. The sheet metal manifold for a server water-cooled radiator according to claim 6, characterized in that: The inner tube body (15c) includes a heat dissipation tube (c1) and an inner core rod (c9). The heat dissipation tube (c1) has a set of side sealing seats (c2) on the left side to maintain the sealing effect on the left side. The side sealing seat (c2) has a set of inlet cones (c3) at the center of the left side to introduce the server heat dissipation coolant from the inside of the flow pipe head (12i). The heat dissipation tube (c1) has a set of spiral heat dissipation fins (c6) inside to increase the contact area of ​​the server heat dissipation coolant. The spiral heat dissipation fins (c6) are spiral structures, and the cross-sectional length of the spiral heat dissipation fins (c6) is the same as the cross-sectional length of the heat dissipation tube (c1). The spiral heat dissipation fins (c6) are made of stainless steel, and the inner side of the spiral heat dissipation fins (c6) has a heat dissipation flow limiting ring (c7) for guiding the server heat dissipation coolant in a spiral path.

8. The sheet metal manifold for a server water-cooled radiator according to claim 7, characterized in that: The outer side of the spiral heat sink (c6) is in close contact with the inner wall of the heat pipe (c1). The inner side of the spiral heat sink (c6) is provided with several sets of flow equalization channels (c8) for evenly distributing the server heat dissipation coolant and maintaining a stable flow rate. The spiral heat sink (c6) has a variable pitch gradient structure. The outlet of the flow equalization channel (c8) is an arc-shaped guide chamfer. The center of the spiral heat sink (c6) is provided with a set of inner core rods (c9) for maintaining the stability of the spiral heat sink (c6). The right side of the heat pipe (c1) is provided with a set of side sealing seats (c5) for maintaining the seal at its right end. The middle right side of the side sealing seat (c5) is provided with a set of outflow cones (c4) for exporting the server heat dissipation coolant. The outflow cones (c4) and inflow cones (c3) are both provided with flow channels. The interiors of the outflow cones (c4), the inflow cones (c3), and the heat dissipation flow limiting rings (c7) are all interconnected.

9. A welding process for sheet metal manifolds of a server water-cooled radiator according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Before welding, the assembly positioning and cleaning protection work must be completed first. The connecting boss (12) and the meshing seat (16) are fully meshed in place to ensure that the outer cover (12a) and the outer sealing plate (16a) are tightly fitted and the inner flywheel (12c) and the positioning tooth ring (16d) are precisely meshed to ensure that the whole is coaxial without gaps and without misalignment. Then, the welding groove (13) is thoroughly cleaned to remove oil stains, oxide scale and coolant residue. The surface of the concave welding groove (13) is wiped with anhydrous ethanol to ensure that the welding area is clean. At the same time, in order to protect the internal flexible rubber sealing plug seat (12e) and the inner sealing ring plug (16f), a high temperature heat insulation film or ceramic fiber paper is pasted on the inside of the flow groove to avoid the welding heat conduction causing the seal to burn and be damaged. S2: Based on the structural characteristics and material requirements of the sheet metal manifold, determine the core welding parameters and special welding materials. Select ER308L low carbon austenitic stainless steel solid welding rod with a specification of Φ1.0mm or Φ1.2mm to meet the welding requirements of the concave narrow groove. The welding method is TIG tungsten inert gas welding. Set the DC positive current to 15A~25A and the argon gas protection flow rate to 6~8L / min. Select WC20Φ2.0mm tungsten electrode and strictly control the penetration depth to only fuse the side wall of the weld groove (13) to avoid melting through the inner wall and damaging the internal structure. S3: The step-by-step welding method is adopted to ensure the quality of the weld. First, spot welding is performed to position the weld. 3 to 4 welding points are evenly distributed along the annular welding groove (13). The welding time of each welding point is controlled at 0.5s to prevent the assembly from rotating and misaligning. Then, continuous annular welding is performed. Hold the welding gun and swing it slightly along the concave welding groove (13) at a uniform speed to control the weld width at 2 to 3mm to ensure that the weld bead is uniform and full, without defects such as undercut or porosity. At the same time, ensure that the welding material completely fills the concave groove. After welding, place the workpiece in a ventilated place for natural air cooling. It is strictly forbidden to use water cooling to prevent stress cracks caused by sudden temperature changes. S4: After welding, the product must pass multiple tests to confirm its qualification. First, a visual inspection is carried out to observe whether the weld is continuous and complete, without surface defects such as cracks, burn-through, or incomplete penetration. Then, an airtightness test is carried out by introducing gas at a pressure of 0.6-0.8 MPa into the flow channel and holding the pressure for 30 minutes. The weld is checked for leakage by observing with a pressure gauge and applying soapy water. Finally, a flow check is carried out using a special diameter tester or fluid tester to confirm that there is no deformation or blockage in the internal flow channel, ensuring that the server's heat dissipation coolant can be smoothly conducted. Only after all indicators meet the standards can the product be judged as qualified.

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