Liquid cooling plate welding tool

Abstract

The utility model relates to a liquid cooling plate welding tool which is used for adsorbing and positioning a liquid cooling plate in the welding process of the liquid cooling plate. The liquid cooling plate comprises a bottom plate and a cover plate which are fixed through welding, a flow channel cavity for cooling liquid to flow is defined between the bottom plate and the cover plate, and the bottom plate is provided with a water opening communicated with the flow channel cavity. The liquid cooling plate welding tool comprises a vacuum adsorption table and a vacuumizing assembly, the vacuum adsorption table is provided with an adsorption face and a vacuum cavity located in the vacuum adsorption table, and the vacuum adsorption table is provided with at least one extraction opening communicating with the vacuum cavity and the vacuumizing assembly and a plurality of adsorption openings communicating with the vacuum cavity and the adsorption face. And a plurality of the adsorption ports are arranged to form adsorption force at the adsorption surface so as to adsorb the bottom plate on the adsorption surface. And at least one of the plurality of adsorption ports is arranged to be adaptively inserted with the water port, so that the runner cavity is communicated with the vacuum cavity, and the cover plate is adsorbed and pressed on the bottom plate. According to the liquid cooling plate welding tool, the welding production efficiency and the welding quality of the liquid cooling plate can be improved.

Description

Technical Field

[0001] This application relates to the field of liquid cooling plate manufacturing technology, and in particular to a liquid cooling plate welding fixture. Background Technology

[0002] Liquid cooling plates are highly efficient heat dissipation components widely used in various thermal management systems. For example, in new energy vehicles, the power batteries generate heat during operation or charging, and liquid cooling plates are often used to cool them. Liquid cooling plates are typically made of aluminum alloy and are produced using brazing or laser welding. Brazing requires heating the entire product to approximately 600°C, resulting in high energy consumption and higher costs. Laser welding offers advantages over brazing in terms of lower energy consumption and cost. To ensure the welding effect of laser welding, the components to be welded must fit tightly during the welding process, requiring a gap of less than 0.1mm to achieve good weld quality. The design of welding fixtures is crucial for improving weld quality. Existing welding fixtures often use mechanical pressing structures to connect components, which suffers from insufficient tightness between components and poor uniformity of stress distribution, affecting weld quality.

[0003] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0004] Based on this, this application provides a welding fixture for liquid cooling plates, which can improve the production efficiency and welding quality of liquid cooling plate welding.

[0005] Therefore, this application adopts the following technical solution: a liquid-cooled plate welding fixture for adsorbing and positioning the liquid-cooled plate during the welding process, wherein the liquid-cooled plate includes a base plate and a cover plate fixed by welding, and the base plate and the cover plate form a flow channel cavity for the flow of coolant, and the base plate has a water inlet communicating with the flow channel cavity, wherein:

[0006] The liquid cooling plate welding fixture includes a vacuum adsorption table and a vacuum pumping assembly. The vacuum adsorption table has an adsorption surface and a vacuum chamber located inside the vacuum adsorption table. The vacuum adsorption table has at least one air extraction port that connects the vacuum chamber and the vacuum pumping assembly, and multiple adsorption ports that connect the vacuum chamber and the adsorption surface.

[0007] Among them, several of the plurality of adsorption ports are configured to form an adsorption force at the adsorption surface to adsorb the base plate onto the adsorption surface; at least one of the plurality of adsorption ports is configured to be adapted to be inserted into the water inlet so that the flow channel cavity is connected to the vacuum chamber to adsorb and press the cover plate onto the base plate.

[0008] In some embodiments, the vacuum adsorption stage includes a base and an upper cover pressed against the base, at least one of the base and the upper cover being provided with a cavity to form the vacuum chamber, and a first sealing ring being provided between the upper cover and the base surrounding the vacuum chamber.

[0009] In some embodiments, the upper cover is provided with a second sealing ring that surrounds the adsorption port therein, and the bottom plate is pressed against the adsorption surface when it is adsorbed.

[0010] In some embodiments, the aperture of the adsorption port is 5-50 mm, the distance between two adjacent adsorption ports is 5-20 mm, and the depth of the vacuum chamber is 5-20 mm.

[0011] In some embodiments, the vacuum assembly includes a vacuum pump, a vacuum tank, and a vacuum valve connected by a pipeline, the vacuum tank being connected between the vacuum pump and the suction port, and the vacuum valve being connected to the pipeline between the vacuum tank and the suction port.

[0012] In some embodiments, the vacuum assembly further includes an exhaust valve connected to a conduit between the suction port and the vacuum valve.

[0013] In some embodiments, the vacuum adsorption stage further includes a positioning element for contacting the sides of the base plate and the cover plate to limit the position of the base plate and the side plate on the adsorption surface.

[0014] In some embodiments, the vacuum adsorption stage further includes an auxiliary clamping member for pressing against the cover plate.

[0015] In some embodiments, there are multiple positioning elements distributed on two intersecting sides.

[0016] In some embodiments, the base plate is a flat plate with a smooth inner surface, the cover plate is a flow channel plate with flow channels on its inner surface, and the welding is laser welding.

[0017] The liquid-cooled plate welding fixture provided in this application includes a vacuum adsorption stage, which has an adsorption surface and a vacuum chamber. The vacuum chamber forms an adsorption force at the adsorption surface through an adsorption port to adsorb the bottom plate of the liquid-cooled plate onto the adsorption surface. At the same time, the vacuum chamber also engages with the water inlet on the bottom plate of the liquid-cooled plate through at least one adsorption port to adsorb and press the cover plate of the liquid-cooled plate onto the bottom plate. This achieves adsorption and pressing of the bottom plate and cover plate of the liquid-cooled plate, ensuring reliable positioning and tight pressing fit during the welding process. This results in a smaller gap between the fits, which is beneficial to improving welding production efficiency and welding quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a side view of an embodiment of the liquid cooling plate welding fixture of this application and the liquid cooling plate.

[0020] Figure 2 This is a top view schematic diagram of another embodiment of the liquid cooling plate welding fixture of this application and the liquid cooling plate.

[0021] Figure 3 This is a side view of another embodiment of the liquid cooling plate welding fixture of this application and the liquid cooling plate.

[0022] The component labels are as follows:

[0023] 10. Vacuum adsorption stage; 1. Base; 11. Vacuum chamber; 12. Ejection port; 2. Top cover; 21. Adsorption port; 22. Adsorption surface; 3. Vacuum pump; 4. Vacuum tank; 5. Piping; 51. Vacuum valve; 52. Exhaust valve; 61. First sealing ring; 62. Second sealing ring; 7. Liquid cooling plate; 71. Base plate; 711. Water inlet; 72. Cover plate; 8. Positioning component; 9. Auxiliary clamping component. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figures 1 to 3 As shown, this application provides a liquid cooling plate welding fixture for adsorption and positioning of the liquid cooling plate 7 during the welding process.

[0030] In one embodiment, the liquid cooling plate 7 includes a base plate 71 and a cover plate 72 fixed by welding, the base plate 71 and the cover plate 72 being welded and fixed to the liquid cooling plate welding fixture. In this embodiment, the welding is laser welding, and after welding, the base plate 71 and the cover plate 72 of the liquid cooling plate 7 form a flow channel cavity for the flow of coolant. The base plate 71 has a water inlet 711 communicating with the flow channel cavity. Two water inlets 711 can be provided to connect with the supply port and return port of the liquid supply system during the use of the liquid cooling plate 7, realizing the circulation of coolant between the liquid cooling plate and the liquid supply system.

[0031] The base plate 71 and cover plate 72 can be formed by stamping aluminum alloy sheets using a die, with a common thickness of 0.6mm to 2mm. At least one of the base plate 71 and cover plate 72 is provided with a flow channel for coolant flow; that is, at least one of the base plate 71 and cover plate 72 is a flow channel plate. Specifically, in some embodiments, the base plate 71 can be a flow channel plate and the cover plate 72 can be a flat plate; in other embodiments, the base plate 71 can be a flat plate and the cover plate 72 can be a flow channel plate; in still other embodiments, both the base plate 71 and the cover plate 72 can be flow channel plates. In this embodiment, the base plate 71 is a flat plate with a flat inner surface, and the cover plate 72 is a flow channel plate with a flow channel on its inner surface. The base plate 71 is a flat plate with a relatively simple structure, so the sprue 711 is formed on the base plate 71, which is easy to manufacture; at the same time, due to the relatively simple structure of the base plate 71, it is easier to accurately position and reliably adhere to the liquid cooling plate welding fixture.

[0032] Please see Figure 1 As shown, in this embodiment, the liquid cooling plate welding fixture includes a vacuum adsorption stage 10 and a vacuum pumping assembly. The vacuum adsorption stage 10 has an adsorption surface 22 and a vacuum chamber 11 located inside the vacuum adsorption stage 10. The vacuum adsorption stage 10 has at least one air extraction port 12 connecting the vacuum chamber 11 and the vacuum pumping assembly, and multiple adsorption ports 21 connecting the vacuum chamber 11 and the adsorption surface 22. Several of the multiple adsorption ports 21 are configured to form an adsorption force at the adsorption surface 22 to adsorb the base plate 71 onto the adsorption surface 22; at least one of the multiple adsorption ports 21 is configured to be adapted to insert into the water inlet 711 so that the flow channel cavity communicates with the vacuum chamber 11, thereby adsorbing and pressing the cover plate 72 onto the base plate 71.

[0033] The liquid-cooled plate welding fixture provided in this application employs vacuum adsorption for the liquid-cooled plate. On one hand, the base plate 71 of the liquid-cooled plate is adsorbed onto the adsorption surface 22 of the vacuum adsorption stage 10, achieving reliable fixation of the base plate 71 and preventing displacement deviation during the welding process. On the other hand, the cover plate 72 of the liquid-cooled plate is adsorbed and pressed tightly against the base plate 71 through the sprue 711, achieving a tight contact and fit between the cover plate 72 and the base plate 71, resulting in a smaller fit gap and improved welding quality. Moreover, the vacuum adsorption stage 10 adsorbs the base plate 71 and the cover plate 72 simultaneously, enabling rapid adsorption and positioning of the liquid-cooled plate, improving the assembly efficiency of the liquid-cooled plate onto the welding fixture, thereby increasing welding production efficiency.

[0034] Please continue reading. Figure 1As shown, in this embodiment, the vacuum adsorption stage 10 includes a base 1 and an upper cover 2 disposed on the base 1. At least one of the base 1 and the upper cover 2 is provided with a cavity to form the vacuum chamber 11. In this embodiment, the base 1 and the upper cover 2 are separate independent parts, with the upper cover 2 pressed against the base 1 and the two locked and fixed. Meanwhile, to prevent air leakage during vacuuming due to a gap between the upper cover 2 and the base 1, which would affect the adsorption force formed at the adsorption surface 22, this embodiment further provides a first sealing ring 61 surrounding the vacuum chamber 11 between the upper cover 2 and the base 1. To facilitate the installation of the first sealing ring 61, a sealing ring mounting groove can be provided on the upper surface of the base 1 or the lower surface of the upper cover 2 to install the first sealing ring 61 in the sealing ring mounting groove. In other embodiments, the base 1 and the upper cover 2 can also be integrated, for example, the base 1 and the upper cover 2 can be welded together. The base 1 and the upper cover 2 can be made of aluminum alloy, stainless steel, carbon steel or copper, etc., and the thickness can be set to 5-100mm.

[0035] In this embodiment, the air extraction port 12 is located on the base 1 and extends through the base 1 to connect the vacuum chamber 11 with the external environment below the base 1. In this embodiment, there is one air extraction port 12; in other embodiments, there may be multiple air extraction ports 12.

[0036] In this embodiment, the adsorption port 21 is formed on the upper cover 2, and the adsorption port 21 penetrates the upper cover 2 to connect the vacuum chamber 11 with the external environment above the upper cover 2. In this embodiment, there are multiple adsorption ports 21, and the multiple adsorption ports 21 are arranged in an array to form an adsorption surface 22 that matches the shape and size of the base 1. In some embodiments, the adsorption port 21 is a cylindrical hole that extends vertically, with a diameter of 5-50 mm, and the distance between two adjacent adsorption ports 21 is 5-20 mm, where the distance between two adjacent adsorption ports 21 refers to the shortest distance between the two adsorption ports 21. In some embodiments, the depth of the vacuum chamber 11 is 5-20 mm.

[0037] The plurality of adsorption ports 21 are preferably evenly distributed to form an adsorption force at the adsorption surface 22 during vacuuming, thereby adsorbing the base plate 71. To prevent air leakage during vacuuming due to gaps between the base plate 71 and the adsorption surface 22 of the upper cover 2, which would affect the adsorption force on the base plate 71, a second sealing ring 62 is provided on the upper cover 2 to surround the adsorption ports 21. When the base plate 71 is adsorbed onto the adsorption surface 22, the second sealing ring 62 is pressed tightly. To facilitate the installation of the second sealing ring 62, a sealing ring mounting groove can be provided on the upper surface of the upper cover 2 or the lower surface of the base plate 71 to install the second sealing ring 62 in the sealing ring mounting groove.

[0038] In this embodiment, the adsorption port 21 has two holes that match the two water inlets 711 on the base plate 71. The two water inlets 711 can be inserted into the adsorption port 21 to connect the vacuum chamber 11 with the flow channel cavity, thereby allowing the main cover plate 72 to be adsorbed and pressed tightly onto the base plate 71 by negative pressure, achieving a tight contact fit between the cover plate 72 and the base plate 71, resulting in a smaller fit gap and improved weld quality.

[0039] Please continue reading. Figure 1 As shown, the vacuum assembly includes a vacuum pump 3, a vacuum tank 4, and a vacuum valve 51 connected by a pipe 5. The vacuum tank 4 is connected between the vacuum pump 3 and the suction port 12, and the vacuum valve 51 is connected to the pipe 5 between the vacuum tank 4 and the suction port 12. Furthermore, the vacuum assembly also includes an exhaust valve 52, which is connected to the pipe 5 between the suction port 12 and the vacuum valve 51.

[0040] The vacuum assembly in this embodiment includes a vacuum tank 4, which serves to "store vacuum," thereby reducing the vacuuming speed of the welding fixture's vacuum chamber 11 and lowering the pumping speed requirements of the vacuum pump 3. Specifically, after completing a vacuum adsorption welding process, the vacuum chamber 11 can be restored to ambient atmospheric pressure by closing the vacuum valve 51 and opening the exhaust valve 52, allowing the liquid cooling plate to be removed from the adsorption surface 22. At this time, the vacuum tank 4 is not connected to the external environment due to the closure of the vacuum valve 51, meaning that the vacuum tank 4 remains in a vacuum environment. Thus, during the next vacuuming operation, when the exhaust valve 52 is closed and the vacuum valve 51 is opened, the vacuum tank 4 allows the vacuum chamber 11 to quickly reach a certain vacuum level. Combined with the pumping action of the vacuum pump 3, the vacuum chamber 11 can quickly reach the preset vacuum level.

[0041] In this embodiment, the vacuum pump 3 is a rotary vane pump; in other embodiments, other types of pumps may also be used. The vacuum valve 51 and the exhaust valve 52 may be ball valves, solenoid valves, etc. In this embodiment, a solenoid valve is used to facilitate electrified automatic operation and improve the intelligence of the system.

[0042] Please see Figure 2 and Figure 3 As shown, in some embodiments, the vacuum adsorption stage 10 further includes a positioning element 8, which contacts the sides of the base plate 71 and the cover plate 72 to limit the position of the base plate 71 and the side plate on the adsorption surface 22. The positioning element 8 can specifically be a positioning block, positioning post, or other structure. The base plate 71 and the cover plate 72 may not have additional structures to cooperate with the positioning element 8, but can be positioned solely by contacting the positioning element 8 from their sides. In some embodiments, the base plate 71 and the cover plate 72 may also have additional structures such as positioning grooves to cooperate with the positioning element 8 for positioning. In this embodiment, there are multiple positioning elements 8, distributed on two intersecting sides, to achieve rapid positioning and to ensure the uniqueness and accuracy of the positioning. Preferably, the positioning elements 8 are distributed on two perpendicularly intersecting sides.

[0043] Furthermore, the vacuum adsorption stage 10 also includes an auxiliary clamping member 9, which is used to press against the cover plate 72. The auxiliary clamping member 9 can be integrated with the positioning member 8 or can be set separately. The auxiliary clamping member 9 can prevent the base plate 71 or cover plate 72 from having poor flatness after stamping, which would prevent the effective formation of a closed space in the initial stage. The clamping action of the auxiliary clamping member 9 helps to carry out vacuuming and can prevent insufficient vacuum clamping force that may be caused by thermal deformation stress during welding.

[0044] The process of using the liquid-cooled plate welding fixture provided in this application is as follows:

[0045] 1) Assemble the base 1, the top cover 2, the first sealing ring 61 and the second sealing ring 62, and fix them with bolts;

[0046] 2) Use pipe 5 to connect vacuum pump 3, vacuum tank 4, vacuum valve 51, exhaust valve 52, air extraction port 12, and related circuits and control systems;

[0047] 3) Close vacuum valve 51 and start vacuum pump 3 to pre-evacuate vacuum tank 4;

[0048] 4) Place the base plate 71 and cover plate 72 according to the positioning requirements;

[0049] 5) Auxiliary clamping parts 9 around the cover plate 72;

[0050] 6) Close the exhaust valve 52 and open the vacuum valve 51. Under the combined action of the negative pressure environment of the vacuum chamber 11 and the external atmospheric pressure, the bottom plate 71 and the cover plate 72 are pressed tightly onto the upper cover 2.

[0051] 7) Laser welding is used to weld the butt joint between the base plate 71 and the cover plate 72;

[0052] 8) After welding is completed, close vacuum valve 51 and open exhaust valve 52;

[0053] 9) Loosen the auxiliary clamping part 9 on the cover plate 72 and remove the welded liquid cooling plate 7.

[0054] As described above, the liquid-cooled plate welding fixture provided in this application includes a vacuum adsorption stage 10. The vacuum adsorption stage 10 has an adsorption surface 22 and a vacuum chamber 11. The vacuum chamber 11 forms an adsorption force at the adsorption surface 22 through the adsorption port 21 to adsorb the bottom plate 71 of the liquid-cooled plate 7 onto the adsorption surface 22. At the same time, the vacuum chamber 11 also cooperates with the water inlet 711 on the bottom plate 71 of the liquid-cooled plate 7 through at least one adsorption port 21 to adsorb and press the cover plate 72 of the liquid-cooled plate 7 onto the bottom plate 71. This achieves adsorption and pressing of the bottom plate 71 and the cover plate 72 of the liquid-cooled plate 7, ensuring reliable positioning and tight pressing fit during the welding process. This results in a smaller fit gap, which is beneficial to improving welding production efficiency and welding quality.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A liquid cooling plate welding tool for adsorbing and positioning a liquid cooling plate (7) during welding of the liquid cooling plate (7), the liquid cooling plate (7) comprising a bottom plate (71) and a cover plate (72) fixed by welding, a flow channel cavity for cooling liquid to flow through being formed between the bottom plate (71) and the cover plate (72), the bottom plate (71) having a water gap (711) communicating with the flow channel cavity, characterized in that: the liquid cooling plate welding tool comprises a vacuum adsorption table (10) and a vacuum pumping assembly, the vacuum adsorption table (10) having an adsorption surface (22) and a vacuum chamber (11) inside the vacuum adsorption table (10), the vacuum adsorption table (10) being provided with at least one air outlet (12) communicating the vacuum chamber (11) and the vacuum pumping assembly, and a plurality of adsorption ports (21) communicating the vacuum chamber (11) and the adsorption surface (22); wherein a plurality of the adsorption ports (21) are arranged to form an adsorption force at the adsorption surface (22) to adsorb the bottom plate (71) on the adsorption surface (22); at least one of the plurality of adsorption ports (21) is arranged to be adapted to be plugged with the water gap (711) so that the flow channel cavity communicates with the vacuum chamber (11) to adsorb and press the cover plate (72) on the bottom plate (71). The vacuum adsorption table (10) comprises a base (1) and an upper cover (2) pressed on the base (1), at least one of the base (1) and the upper cover (2) is provided with a recess to form the vacuum chamber (11), and a first sealing ring (61) is arranged between the upper cover (2) and the base (1) to surround the vacuum chamber (11). The upper cover (2) is provided with a second sealing ring (62) surrounding the adsorption ports (21), and the second sealing ring (62) is pressed when the bottom plate (71) is adsorbed on the adsorption surface (22).

2. The liquid cold plate welding fixture of claim 1, wherein, The adsorption ports (21) have a pore size of 5-50 mm, the spacing between adjacent two adsorption ports (21) is 5-20 mm, and the depth of the vacuum chamber (11) is 5-20 mm.

3. The liquid cold plate welding fixture of claim 2, wherein, The vacuum pumping assembly comprises a vacuum pump (3), a vacuum tank (4) and a vacuum valve (51) connected by pipelines (5), the vacuum tank (4) is connected between the vacuum pump (3) and the air outlet (12), and the vacuum valve (51) is connected to the pipeline (5) between the vacuum tank (4) and the air outlet (12).

4. The liquid cold plate welding fixture of claim 1, wherein, The vacuum pumping assembly further comprises an exhaust valve (52) connected to the pipeline (5) between the air outlet (12) and the vacuum valve (51).

5. The liquid cold plate welding fixture of any one of claims 1 to 4, wherein, The vacuum adsorption table (10) further comprises a positioning member (8) for contacting the side edges of the bottom plate (71) and the cover plate (72) to limit the position of the bottom plate (71) and the cover plate (72) on the adsorption surface (22).

6. The liquid cold plate welding fixture of claim 5, wherein, The vacuum adsorption table (10) further comprises an auxiliary pressing member (9) for pressing on the cover plate (72).

7. The liquid cold plate welding fixture of any one of claims 1 to 4, wherein, ​ 8. The liquid cold plate welding fixture of claim 7, wherein, ​ 9. The liquid cold plate welding fixture of claim 7, wherein, The positioning members (8) are multiple and are distributed on two intersecting edges.

10. The liquid cold plate welding fixture of claim 1, wherein, The bottom plate (71) is a flat plate with a flat inner surface, the cover plate (72) is a flow channel plate with a flow channel on the inner surface, and the welding is laser welding.

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