Processing method of water cooling table and water cooling table

Abstract

The invention relates to the technical field of water cooling table production, and discloses a machining method of a water cooling table and the water cooling table, and the water cooling table comprises a base body made of stainless steel and a waterway plate made of oxygen-free copper. The base body and the waterway board are welded and connected in a vacuum electron beam welding mode, the whole process is conducted in a vacuum environment, no gas exists in a weld joint, the weld joint is pure and free of oxidation and other defects, pollution of harmful gas to molten pool metal can be prevented, and it is guaranteed that a high-quality connector with good structure and mechanical performance can be obtained finally. The welding process is divided into three welding processes of preheating, surface coke welding and floating coke welding. Through the improvement of welding processes such as welding high pressure, beam size, welding speed, offset (deviating from the copper side by 0.2 mm) and the like, the problem of welding yield of dissimilar materials with overlarge thermal conductivity difference is effectively solved. And on the premise that the welding depth is reached, the stability of a welding structure is ensured and welding defects are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of water cooling table production, and in particular to a processing method of a water cooling table and the water cooling table. Background Art

[0002] Water cooling table usually refers to the cooling system used for electronic equipment, especially high-performance computer hardware such as water-cooled CPU radiator or water-cooled server. The water cooling system uses water or other liquids as cooling medium to absorb and transfer heat through circulation, thereby cooling the equipment. Compared with the traditional air cooling system, this cooling method has higher heat conduction efficiency and lower noise level.

[0003] Common materials for water-cooled tables include copper, which has good heat transfer effects. Under the same conditions, copper can transfer heat from one place to another more quickly, achieving more efficient heat dissipation. In application scenarios that require rapid heat dissipation, copper is widely used to make radiators and heat pipes due to its excellent thermal conductivity. In addition, copper also has good antibacterial ability, dirt is not easy to adhere to the surface, and it is easier to clean. This makes copper more advantageous in situations that need to be kept clean and hygienic. However, copper is expensive and heavy. Water-cooled tables made of copper are expensive and will greatly increase the overall weight of the equipment. In addition, the strength of copper is relatively low, and copper water-cooled tables are insufficient in strength and durability.

[0004] SUMMARY OF THE INVENTION

[0005] The technical problem solved by the present invention is that the water cooling table made of copper is relatively high in cost and heavy in weight.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for processing a water-cooling table comprises the following steps:

[0008] Obtain a substrate and a waterway plate for use; wherein the substrate is made of stainless steel, and the waterway plate is made of oxygen-free copper;

[0009] Pre-treat the substrate and waterway plate to be connected: remove oxides and impurities on the surface of the substrate and waterway plate;

[0010] The base and the waterway plate are welded together by vacuum electron beam welding, with a welding speed of 350-600mm / min. The specific process is as follows:

[0011] First, the water cooling table base and the waterway plate are fixedly placed on the welding workbench;

[0012] Preheating welding: The first welding uses 10-30mA beam welding to preheat and fix the sample;

[0013] Surface coke welding: The second welding is carried out on the outside of the first welding. The second welding adopts 60-80mA beam current for surface coke welding.

[0014] Floating focus welding: After the second welding is completed, the third welding process is carried out on the outside. The third welding adopts 20-40mA beam current for floating focus welding;

[0015] After welding is completed, the product is obtained and removed from the welding workbench to enter the next process.

[0016] In one embodiment of the present invention, the processing accuracy of the substrate and the waterway plate is ±0.1 mm.

[0017] In one embodiment of the present invention, the pretreatment process includes: grinding the weld joint gradually with an air grinder to completely remove the surface oxide; then wiping the weld joint with anhydrous ethanol and a dust-free cloth, and then air-drying with a high-pressure air gun for standby use.

[0018] In one embodiment of the present invention, during the grinding process, the air grinder uses 200-1000 mesh sandpaper.

[0019] In one embodiment of the present invention, during welding, the center of the joint between the substrate and the waterway plate, which is 0.2 mm close to one side of the waterway plate, is used as the center point of the weld.

[0020] In one embodiment of the present invention, the entire welding process is carried out in a vacuum degree of 5×10 -3 Pa environment.

[0021] A water-cooling table obtained by the above method.

[0022] In one embodiment of the present invention, the waterway plate is circular in shape, and the outer diameter of the waterway plate is 256-264 mm.

[0023] In one solution of the present invention: a boss structure is protruding outwardly provided on one side surface of the waterway plate.

[0024] In one embodiment of the present invention, the boss structure has a diameter of 240-248 mm and a height of 2-3 mm.

[0025] A processing method of a water-cooling stage and a water-cooling stage according to the present invention have at least one of the following technical effects:

[0026] This application uses vacuum electron beam welding to weld the substrate and the waterway plate. The entire process is carried out in a vacuum environment. There is no gas in the weld, the weld is pure and free of defects such as oxidation, which can prevent harmful gases from contaminating the molten pool metal and ensure that a high-quality joint with good structure and mechanical properties can be obtained in the end.

[0027] This application divides the welding process into three welding processes: preheating, surface coking and floating coking. By improving the welding process such as welding high voltage size, beam size, welding speed, offset (0.2mm on the copper side), the problem of welding yield of dissimilar materials with large difference in thermal conductivity is effectively solved. The stability of the welding structure is guaranteed without welding defects (pores, cracks, etc.) while reaching the welding depth.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is a structural schematic diagram of the cross section of the water cooling table of the present invention.

[0031] The reference numerals in the figure are: 1, waterway plate; 2, substrate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] See also Figure 1The present invention is a water-cooling table, comprising a fixedly connected base 2 and a waterway plate 1, wherein a space is enclosed between the base 2 and the waterway plate 1 for the circulation or accommodation of a heat exchange medium such as water. Specifically, the fixed connection method is welding. The base 2 is made of 304 stainless steel, and the base 2 may include a base and a connecting portion of an integral structure, wherein the base includes a bottom structure with a U-shaped cross-section and an edge structure connected to an open end of the bottom structure, and the edge structure is a plate-like structure. The connecting portion is fixedly arranged vertically with the edge structure and is located at the outer side of the bottom structure. The waterway plate 1 is made of copper, specifically, oxygen-free copper, and more specifically, TU1 oxygen-free copper. The waterway plate 1 is a plate-like structure, and the size of the waterway plate 1 matches the size enclosed by the connecting portion, and is fixedly connected to the end of the connecting portion away from the base, and the contact position between the two is the welding position. Furthermore, a boss structure is provided on one side of the waterway plate 1, and the outer side of the boss structure is used to fit with the inner wall of the connection part, so that after the base 2 and the waterway plate 1 are connected, the boss structure can be embedded in the connection part to improve the strength of the connection position between the two. The cross-sectional profile of the base 2 and the waterway plate 1 after connection can be Figure 1 As shown, its specific shape can be a long strip formed by extending the cross section in the direction perpendicular to the paper surface, or a cylindrical structure. As an example, in this embodiment, the water cooling stage has a cross section as shown in Figure 1 The structure shown includes multiple cylindrical structures with different diameters. Specifically, the outer diameter of the waterway plate 1 can be 256-264 mm, the diameter of the boss structure can be 240-248 mm, and the height (dimension along the axis direction) can be 2-3 mm. In actual use, the water cooling platform can also be designed into a specific shape according to the specific installation position so as to match other structures.

[0036] See also Figure 1 The present invention also provides a method for processing a water-cooling table, comprising the following steps:

[0037] Obtain the substrate 2 and the waterway plate 1 for use; the substrate 2 and the waterway plate 1 may be obtained by self-processing, outsourcing or direct purchase. The processing of the substrate 2 and the waterway plate 1 includes: according to the design drawings and process requirements, the corresponding dimensions of the drawings are processed by CNC lathes and general lathes. As an example, the outer diameter of the waterway plate 1 may be 256-264mm, the diameter of the boss structure may be 240-248mm, and the height (dimension along the axial direction) may be 2-3mm. The processing accuracy during the processing is ±0.1mm. The depth of the weld between the substrate 2 and the waterway plate 1 is 8-12mm, and dimensional considerations need to be made during the design and processing stage.

[0038] The substrate 2 and the waterway plate 1 to be connected are pretreated: the pretreatment is especially for the welding joint position, and the pretreatment includes grinding the surface of the parts to completely remove the surface oxides and grind out the metallic luster; then wipe the welding joint with anhydrous ethanol and a dust-free cloth, and then use a high-pressure air gun to air-dry for standby use; wherein, the grinding process can use an air grinder and use 200-1000 mesh sandpaper to gradually grind the welding joint to completely remove the surface oxides and grind out the metallic luster.

[0039] The substrate 2 and the waterway plate 1 are welded and connected by vacuum electron beam welding. The whole welding process is carried out in a vacuum degree of 5×10 -3 Pa environment. The specific process is as follows: First, the water-cooled table base 2 and the waterway plate 1 are fixed on the welding workbench. The process can be fixed with a three-claw fixture to maintain the stability of the workpiece and prevent the deviation during welding from affecting the welding quality. The welding speed of the welding process is 350-600mm / min. The welding is carried out in three welding processes: preheating, surface focus and floating focus: the first welding is 10-30mA beam welding to preheat and fix the sample; then the second welding is carried out on the outside of the first welding, and the second welding is carried out with a 60-80mA beam for surface focus welding; after the second welding is completed, the third welding process is carried out on the outside, and the third welding is carried out with a 20-40mA beam for floating focus welding. The total depth of the three weldings is 10-12mm. After the welding is completed, the product is obtained, and the product is removed from the welding workbench and enters the next process. The next process can be inspection, packaging, etc.

[0040] Working principle of the present invention:

[0041] Copper has good thermal conductivity, so it is often used as a material for water-cooled tables, but copper is expensive, heavy, and lacks strength. Compared with copper, stainless steel also has good thermal conductivity. Although its thermal conductivity is not as good as copper, stainless steel has certain advantages in comprehensive cost and durability, especially in situations where long-term use is required. Therefore, the present application utilizes the excellent heat dissipation of copper and the low cost and high strength of stainless steel, and uses oxygen-free copper as the waterway plate 1 and stainless steel as the substrate 2, and the two are combined to prepare a water-cooled table. It is possible to reduce the processing cost of the water-cooled table while ensuring the excellent thermal conductivity, strength performance and weight parameters of the water-cooled table. However, the welding of copper and stainless steel has many problems related to their different physical and chemical properties, including their melting points, thermal expansion coefficients, thermal conductivity, etc. In addition, the joints between copper-based and iron-based materials will lead to deterioration of mechanical properties.

[0042] The present application adopts vacuum electron beam welding to weld the substrate 2 and the waterway plate 1. The whole process is carried out in a vacuum environment. There is no gas in the weld. The weld is pure and has no defects such as oxidation. It can prevent harmful gases from polluting the molten pool metal and ensure that a high-quality joint with good organization and mechanical properties can be obtained in the end. At the same time, the present application divides the welding process into three welding processes: preheating, surface coking and floating coking. Under the premise of reaching the welding depth, the stability of the welding structure is guaranteed and no welding defects (pores, cracks, etc.) are introduced.

[0043] Example 1

[0044] The 304 stainless steel water-cooling table base 2 and the oxygen-free copper TU1 waterway plate 1 are processed by CNC lathe and general lathe to the corresponding size of the drawing. After processing, the 304 stainless steel water-cooling table base 2 and the oxygen-free copper TU1 waterway plate 1 are gradually polished with 400-1000 (such as 800) grit sandpaper using an air grinder to completely remove the surface oxides and polish out the metallic luster. Then, the welding joints are wiped with anhydrous ethanol and a dust-free cloth, and then air-dried with a high-pressure air gun for standby use; the water-cooling table base 2 and the waterway plate 1 are placed on the welding workbench, and the welding vacuum is 5×10 -3 Pa. At 0.2mm on the steel side (i.e., the center of the weld is 0.2mm close to the side of the substrate 2), three welding processes of preheating, surface focus and floating focus are carried out in sequence: the first welding (one welding on the outer wall of the junction of the substrate 2 and the water-cooling table) uses a 20mA beam and a welding speed of 350mm / min to preheat the sample; the second welding (second welding outside the first welding) uses a 70mA beam and a welding speed of 350mm / min for surface focus welding; the third welding is carried out on the outside after the second welding, and a 30mA beam and a welding speed of 600mm / min are used for floating focus welding. After welding, product 1 is obtained.

[0045] Example 2

[0046] The 304 stainless steel water-cooling table base 2 and the oxygen-free copper TU1 waterway plate 1 are processed by CNC lathe and general lathe to the corresponding size of the drawing. After processing, the 304 stainless steel water-cooling table base 2 and the oxygen-free copper TU1 waterway plate 1 are gradually polished with 400-1000 (such as 800) grit sandpaper using an air grinder to completely remove the surface oxides and polish out the metallic luster. Then, the welding joints are wiped with anhydrous ethanol and a dust-free cloth, and then air-dried with a high-pressure air gun for standby use; the water-cooling table base 2 and the waterway plate 1 are placed on the welding workbench, and the welding vacuum is 5×10 -3Pa. For the center welding (i.e. the center of the joint between the substrate 2 and the waterway plate 1 is taken as the center point of the weld), three welding processes of preheating, surface focus and floating focus are carried out in sequence: the first welding (one welding on the outer wall of the joint between the substrate 2 and the water cooling table) uses a 20mA beam and a welding speed of 350mm / min to preheat the sample; the second welding (second welding outside the first welding) uses a 70mA beam and a welding speed of 350mm / min for surface focus welding; the third welding is carried out outside after the second welding, and a 30mA beam and a welding speed of 600mm / min are used for floating focus welding. Sample 2 is obtained after welding is completed.

[0047] Example 3

[0048] The 304 stainless steel water-cooling table base 2 and the oxygen-free copper TU1 waterway plate 1 are processed by CNC lathe and general lathe to the corresponding size of the drawing. After processing, the 304 stainless steel water-cooling table base 2 and the oxygen-free copper TU1 waterway plate 1 are gradually polished with 400-1000 (such as 800) grit sandpaper using an air grinder to completely remove the surface oxides and polish out the metallic luster. Then, the welding joints are wiped with anhydrous ethanol and a dust-free cloth, and then air-dried with a high-pressure air gun for standby use; the water-cooling table base 2 and the waterway plate 1 are placed on the welding workbench, and the welding vacuum is 5×10 -3 Pa. Welding is performed at 0.2mm on the copper side (i.e., the center of the junction between the substrate 2 and the waterway plate 1 is 0.2mm close to the side of the waterway plate 1 as the center point of the weld), and three welding processes of preheating, surface focus and floating focus are performed in sequence: the first welding (one welding is performed on the outer wall of the junction between the substrate 2 and the water-cooling table) uses a 20mA beam and a welding speed of 350mm / min to preheat the sample; the second welding (a second welding is performed on the outside of the first welding) uses a 70mA beam and a welding speed of 350mm / min for surface focus welding; the third welding is performed on the outside after the second welding, and a 30mA beam and a welding speed of 600mm / min are used for floating focus welding. Sample three is obtained after welding is completed.

[0049] The samples obtained in the above-mentioned embodiments 1, 2 and 3 were tested respectively, and it was found that the weld width of sample 1 was 3.5-3.8mm and the depth was 10-10.5mm. The weld collapsed over a large area on the steel side. The weld width of sample 2 was 3-3.5mm and the depth was 11-11.5mm. Compared with sample 1 obtained in Example 1, the weld width was smaller and the degree of weld collapse was slightly improved. The weld width of sample 3 was 4-4.5mm and the depth was 11.5-12mm. Compared with Example 1, the weld width and the depth of penetration increased, and the weld was full. Therefore, in actual production, the copper side (such as 0.2mm) is preferably used as the welding position.

[0050] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A method for processing a water-cooling stage, characterized in that: The steps include: Obtain a substrate (2) and a waterway plate (1) for standby use; wherein the substrate (2) is made of stainless steel, and the waterway plate (1) is made of oxygen-free copper; Pre-treating the substrate (2) and the waterway plate (1) to be connected: removing oxides and impurities on the surfaces of the substrate (2) and the waterway plate (1); The base body (2) and the waterway plate (1) are welded and connected by vacuum electron beam welding, and the welding speed is 350-600 mm / min. The specific process is as follows: Firstly, the water cooling table base (2) and the waterway plate (1) are fixedly arranged on a welding workbench; Preheating welding: The first welding uses 10-30mA beam welding to preheat and fix the sample; Surface coke welding: The second welding is carried out on the outside of the first welding. The second welding adopts 60-80mA beam current for surface coke welding. Floating focus welding: After the second welding is completed, the third welding process is carried out on the outside. The third welding adopts 20-40mA beam current for floating focus welding; After welding is completed, the product is obtained and removed from the welding workbench to enter the next process.

2. The method for processing a water-cooling stage according to claim 1, characterized in that: The processing accuracy of the base body (2) and the waterway plate (1) is ±0.1 mm.

3. The method for processing a water-cooling stage according to claim 1, characterized in that: The pretreatment process includes: grinding the weld joint gradually with an air grinder to completely remove the surface oxide; then wiping the weld joint with anhydrous ethanol and a dust-free cloth, and then air-drying with a high-pressure air gun for standby use.

4. The method for processing a water-cooling stage according to claim 3, characterized in that: During the grinding process, the air grinder uses 200-1000 grit sandpaper.

5. The method for processing a water-cooling stage according to claim 1, characterized in that: During the welding process, the center of the joint between the base body (2) and the waterway plate (1) is 0.2 mm from one side of the waterway plate (1) as the center point of the weld.

6. The method for processing a water-cooling stage according to claim 5, characterized in that: The whole welding process is carried out in a vacuum of 5×10 -3 It is carried out in the environment of Pa.

7. A water cooling table, characterized in that: The water-cooling stage is manufactured by the water-cooling stage processing method according to any one of claims 1 to 6.

8. A water cooling table according to claim 7, characterized in that: The waterway plate (1) is circular in shape, and the outer diameter of the waterway plate (1) is 256-264 mm.

9. A water-cooled stage according to claim 8, characterized in that: A boss structure is protruding outwardly from one side surface of the waterway plate (1).

10. A water cooling table according to claim 9, characterized in that: The boss structure has a diameter of 240-248 mm and a height of 2-3 mm.

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