Pressing device for liquid cooling plate welding and welding system

Abstract

The utility model discloses a hold-down device and a welding system for liquid cooling plate welding, which belong to the technical field of liquid cooling plate processing, and comprise a support plate, hold-down strips and a vacuum-pumping assembly, by utilizing the corresponding arrangement of the hold-down strips, a runner top plate and a plane bottom plate which are overlapped can be held down on the support plate, and the vacuum-pumping assembly is arranged on the support plate. The circumferential edge of the workpiece to be welded is preliminarily positioned and fixed through the connection of the vacuumizing assembly and the working medium inlet and the working medium outlet of the workpiece to be welded, so that the vacuumizing assembly can vacuumize the flow channel area of the workpiece to be welded, and the welding positions between the two plate bodies are pressed respectively under the action of the internal and external pressure difference. The pressing device for welding the liquid cooling plate is simple in structure, convenient to use and capable of ensuring the consistency of stress pressing of all welding parts in the welding process of the liquid cooling plate and ensuring the welding quality of all welding areas in the subsequent welding process, so that the manufacturing precision and efficiency of the liquid cooling plate are improved, and the production cost is reduced. And the production cost and the application cost of the liquid cooling plate are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid cooling plate processing, and in particular relates to a pressing device and a welding system for liquid cooling plate welding. Background Art

[0002] With the continuous development and progress of new energy technology, its role in people's daily life is becoming more and more important, which also puts forward higher requirements for the development of related technologies. As the key application direction of new energy technology, new energy vehicle technology has developed rapidly in recent years and has been widely used in people's daily life.

[0003] For new energy vehicles, the power battery pack is the core component, and the setting of the liquid cooling plate is also indispensable for the power battery pack. It plays the role of cooling the power battery pack and is related to the normal use and service life of the power battery pack.

[0004] For liquid cooling plates, what is usually used is a metal plate formed by stacking two layers of plates and having a sealed flow channel. The heat generated by the power battery pack during operation is taken away by the circulation of liquid medium in the sealed flow channel, thereby achieving cooling of the power battery pack. At present, the main method used for the production of liquid cooling plates is brazing, that is, a plate with a pre-coated layer of brazing material is used, and the upper and lower layers of plates are clamped by a tooling and then put into a high-temperature furnace to achieve brazing connection. Although this process can realize the manufacture of liquid cooling plates to a certain extent, it has obvious defects, which are mainly reflected in high cost, poor molding quality, low production efficiency, etc. It cannot effectively meet the increasing application needs of liquid cooling plates and has obvious limitations.

[0005] Although some improvement schemes have been proposed in the related art to improve the production process of liquid cooling plates, such as introducing laser welding to replace the brazing process, so as to reduce the high material cost and processing cost of the brazing process. However, for laser welding, it also has obvious defects and problems that need to be solved urgently. Since there are many welding points on the liquid cooling plate, which are distributed in multiple positions on the plate surface, it is difficult for conventional clamping tools to meet the clamping of each point at the same time, and conventional clamping tools often block the welding points while completing the clamping. Therefore, the existing laser welding process can only choose to clamp the vicinity of the part to be welded and expose the part to be welded to avoid the clamping tool itself from blocking the welding part. This method is bound to bring about defects such as poor clamping effect of the clamping tool, frequent replacement of welding parts, and inconsistent force during welding of each welding part, resulting in the processing accuracy and processing efficiency of the liquid cooling plate cannot be fully guaranteed, and cannot fully meet the needs of practical applications. Utility Model Content

[0006] In view of one or more of the above deficiencies or improvement requirements of the prior art, the present utility model provides a pressing device and a welding system for liquid-cooled plate welding, which can achieve reliable pressing of each welding point during the liquid-cooled plate welding process, ensure the consistency of the pressing force in each area, reduce the shielding of the welding part by the pressing device, and improve the efficiency and precision of the liquid-cooled plate welding process.

[0007] To achieve the above object, in one aspect of the present utility model, there is provided a pressing device for liquid-cooled plate welding, which is used for pressing each welding area between the flow channel top plate and the flat bottom plate in the workpiece to be welded, and it includes:

[0008] A support plate, which has a fixed end face for supporting and placing the flat bottom plate, and at one end of the support plate, avoidance grooves are respectively opened corresponding to the working fluid inlet and the working fluid outlet at one end of the flat bottom plate, so as to realize the avoidance and embedding of the working fluid inlet and the working fluid outlet when the flat bottom plate is pressed and fixed on the support plate;

[0009] A pressing strip, which is a profiled structure arranged circumferentially, and the shape of the area surrounded by it corresponds to the outer contour shape of the workpiece to be welded, so that the superposed flow channel top plate and the flat bottom plate can be pressed on the support plate by the inner area of the pressing strip;

[0010] A vacuum pumping assembly, which can be respectively communicated with the working fluid inlet and the working fluid outlet of the workpiece to be welded pressed on the support plate, and is used for performing a vacuum pumping operation on the flow channel area inside the workpiece to be welded, so that the plate surfaces of each welding area between the two plate bodies of the workpiece to be welded are all pressed.

[0011] As a further improvement of the present utility model, the vacuum pumping assembly includes a vacuum machine, a three-way joint, and a first connecting pipe, a second connecting pipe, and a third connecting pipe arranged corresponding to the three-way joint;

[0012] One ends of the three connecting pipes are respectively connected to the three joints of the three-way joint; the other end of the first connecting pipe can be used for connecting with the working fluid inlet, the other end of the second connecting pipe can be used for connecting with the working fluid outlet, and the other end of the third connecting pipe is connected to the vacuum machine.

[0013] As a further improvement of the present utility model, the outer area of the pressing strip is detachably connected to the fixed end face through a plurality of connecting pieces.

[0014] As a further improvement of the present utility model, the pressing strip is composed of a plurality of circumferentially spliced structures, and a plurality of connecting holes are arranged in an array on the fixed end face, and different pressing strip segments can be selected according to the outer contour size of the workpiece to be welded and fixed on the fixed end face.

[0015] As a further improvement of the present utility model, the thickness of the support plate is not less than the maximum value of the distances between the outer periphery of the working fluid inlet, the outer periphery of the working fluid outlet, and the end face of the flat bottom plate.

[0016] As a further improvement of the present utility model, a plurality of weight-reducing grooves are provided on the side end face of the support plate facing away from the fixed end face.

[0017] As a further improvement of the present utility model, a groove with a certain depth is provided on the fixed end face corresponding to the outer contour of the workpiece to be welded, so that the flow channel top plate and the flat bottom plate to be welded can be embedded in the groove for positioning after being superposed.

[0018] Another aspect of the present utility model provides a welding system for liquid cooling plate welding, which includes the pressing device for liquid cooling plate welding described above; and

[0019] The welding system further includes a welding device, which is connected to a displacement mechanism and can reciprocate above the pressing device under the drive of the displacement mechanism, so that the welding part of the welding device corresponds to the welding position of the workpiece to be welded pressed on the pressing device.

[0020] As a further improvement, it further includes a controller electrically connected to the displacement mechanism;

[0021] The controller is used to read the internal flow channel diagram of the workpiece to be welded, thereby determining the welding position on the workpiece to be welded and controlling the automatic operation of the displacement mechanism.

[0022] As long as the above-mentioned improved technical features do not conflict with each other, they can be combined with each other.

[0023] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the present utility model include:

[0024] (1)The clamping device for liquid cooling plate welding of the present utility model includes a support plate, a pressing strip and a vacuum pumping assembly. By the corresponding arrangement of the pressing strip, the superposed runner top plate and flat bottom plate can be pressed on the support plate, realizing the preliminary positioning and fixing of the circumferential edge of the workpiece to be welded. Then, by connecting the vacuum pumping assembly with the working medium inlet and working medium outlet of the workpiece to be welded, the vacuum pumping assembly can evacuate the runner area of the workpiece to be welded. Under the action of the internal and external pressure difference, the respective welding positions between the two plates are pressed, ensuring the consistency of the pressing state during the welding of each part of the liquid cooling plate, thereby improving the welding quality of the liquid cooling plate. Moreover, by the combined action of the pressing strip and the vacuum pumping assembly, it can effectively avoid the shielding of the welding parts caused by the pressing and clamping of the workpiece to be welded, and can effectively avoid the disadvantages of the traditional mechanical tooling pressing. For the wide-width workpiece to be welded, a better and more uniform pressing effect can be obtained, and all welding parts can be welded through one-time clamping and pressing, greatly improving the efficiency and quality of the liquid cooling plate welding manufacturing.

[0025] (2)The clamping device for liquid cooling plate welding of the present utility model, by preferably designing the structures of the vacuum pumping assembly, the pressing strip and the support plate, enables the workpiece to be welded to accurately complete the positioning and fixing on the support plate, and ensures the reliability of the subsequent horizontal setting of the support plate, further improving the welding precision and efficiency of the liquid cooling plate.

[0026] (3)The welding system for liquid cooling plate welding of the present utility model, through the combined setting of the welding device and the clamping device, enables the workpiece to be welded to quickly complete the welding operations of each part after being clamped and fixed. By improving the clamping method, the welding process of the liquid cooling plate is further simplified, saving the operation time wasted due to frequent replacement of the pressing position, improving the efficiency and quality of the liquid cooling plate welding process, and reducing the processing cost and application cost of the liquid cooling plate.

[0027] (4)The clamping device for liquid cooling plate welding in the present utility model has a simple structure and is convenient to use. It can uniformly press each welding part of the two plates of the workpiece before the liquid cooling plate welding process, ensuring the consistency and reliability of the pressing force on each welding part during the liquid cooling plate welding process, ensuring the welding quality of each welding area during the subsequent welding process, thereby improving the precision and efficiency of the liquid cooling plate manufacturing, and reducing the production cost and application cost of the liquid cooling plate. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 It is a schematic diagram when the pressing device for liquid cooling plate welding in the embodiment of the present utility model presses the workpiece.

[0030] Figure 2 It is a schematic diagram of the combined setting of the support plate and the pressing strip of the pressing device in the embodiment of the present utility model.

[0031] Figure 3 It is a front view schematic diagram of the support plate of the pressing device in the embodiment of the present utility model.

[0032] Figure 4 It is a back view schematic diagram of the support plate of the pressing device in the embodiment of the present utility model.

[0033] Figure 5 It is a schematic diagram of the combined setting of the pressing strip and the connecting piece of the pressing device in the embodiment of the present utility model.

[0034] Figure 6 It is a schematic diagram of the structural disassembly of the workpiece to be welded in the embodiment of the present utility model.

[0035] Figure 7 It is a side view schematic diagram of the structure of the workpiece to be welded in the embodiment of the present utility model.

[0036] Figure 8 It is a schematic diagram when the workpiece to be welded is limited on the support plate in the embodiment of the present utility model.

[0037] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0038] 1. Pressing tooling; 2. Workpiece to be welded.

[0039] 101. Support plate; 1011. Plate body; 1012. Avoidance groove; 1013. Weight reduction groove; 102. Pressing strip; 103. Connecting piece; 104. First connecting pipe; 105. Second connecting pipe; 106. Three-way joint; 107. Third connecting pipe; 108. Vacuum machine.

[0040] 201. Flow channel top plate; 202. Plane bottom plate; 203. Working medium inlet; 204. Working medium outlet. Detailed implementation manners

[0041] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0042] In the description of the present utility model, it should be understood that unless otherwise clearly specified and defined, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0046] Embodiment:

[0047] For the clamping device used for liquid cooling plate welding in the preferred embodiment of the utility model, it is mainly used in the welding process of the liquid cooling plate workpiece, especially for fixing the workpiece during the laser welding process of the liquid cooling plate, ensuring the reliability of position fixation during the laser welding process of the liquid cooling plate workpiece, and ensuring the consistency of the clamping state between the points to be welded.

[0048] For the workpiece 2 to be welded (liquid cooling plate to be welded) in the preferred embodiment, its structure is as follows: Figure 6 , Figure 7 As shown in the figure, it includes a flow channel top plate 201 and a plane bottom plate 202. Among them, the flow channel top plate 201 is used to connect to the plane bottom plate 202 on one side end surface, and has grooves staggered in horizontal and vertical directions. Its outer circumference is in the form of a horizontal plate. After the flow channel top plate 201 is superimposed on the one side end surface of the plane bottom plate 202, its outer circumference horizontal plate surface can be fitted with the plate surface of the plane bottom plate 202, and then after the two plates are welded, a closed flow channel can be formed between the two plates.

[0049] For the flow channel top plate 201 in the preferred embodiment, it is usually formed by extrusion, that is, the flow channel structure is extruded from one side to the other side on a flat plate. Therefore, for the flow channel top plate 201 in the preferred embodiment, the side away from the flow channel is not a flat plate surface, but a concave and convex form corresponding to the flow channel; and, in the unextruded part of the middle of the flow channel top plate 201 (that is, the area on both sides of the flow channel), there are still horizontal plate surfaces that are flush with the peripheral annular plate surface, and the positions of these plate surfaces will also be used as welding positions when the liquid cooling plate is subsequently welded.

[0050] During the actual setting, the flow channel on the workpiece 2 to be welded extends to various areas in its length and width directions, so that after the flat bottom plate 202 is set corresponding to the equipment to be cooled (such as a power battery), each area of ​​the plate surface of the flat bottom plate 202 has a corresponding flow channel, thereby ensuring the cooling effect of the workpiece 2 to be welded when it is used after welding.

[0051] Therefore, in actual welding, welding positions are usually formed on both sides of the width direction of each flow channel, and dense welding is required to ensure the reliability of the flow channel setting in each area. However, due to the non-flat design of the flow channel top plate 201 on the side away from the flow channel, it is difficult to directly use a traditional mechanical clamping structure to clamp all the parts to be welded when welding the middle area of ​​the flow channel top plate 201, which is also the fundamental reason for the design of the clamping device in the preferred embodiment of the utility model.

[0052] In addition, in actual settings, a working fluid inlet 203 and a working fluid outlet 204 are provided corresponding to the closed flow channel between the two plates, so that the cooling working fluid enters the closed flow channel from the working fluid inlet 203, and the working fluid after absorbing heat flows out from the working fluid outlet 204, and the cooling process of the corresponding object is completed by the flow of the cooling working fluid.

[0053] In actual settings, the working fluid inlet 203 and the working fluid outlet 204 are preferably arranged on the side of the plane bottom plate 202 away from the flow channel top plate 201, and both are connecting pipes connected to the plane bottom plate 202. The two connecting pipes respectively protrude from the end surface of the plane bottom plate 202 away from the flow channel top plate 201, and are connected to the end surface of one side of the plane bottom plate 202 connected to the flow channel top plate 201, and the other ends of the two connecting pipes are further preferably extended along the length direction of the plane bottom plate 202 and protrude from the end of the plane bottom plate 202.

[0054] As for the clamping device in the preferred embodiment, it is mainly used to press the side end face of the flow channel formed on the flow channel top plate 201 with the side end face of the plane bottom plate 202 during the liquid cooling plate welding process, so that the area of ​​the side end face of the flow channel top plate 201 without the flow channel can be pressed against the end face of the plane bottom plate 202.

[0055] As follows, combined Figures 1 to 8 The illustrated contents in the figure describe in detail the structure of the clamping device and its use process in the preferred embodiment of the utility model.

[0056] See also Figure 1 The clamping device for welding the liquid cooling plate in the preferred embodiment of the utility model includes a plate-shaped support plate 101 and a pressure strip 102 arranged on the front side of the support plate 101, and a vacuum assembly is arranged corresponding to the workpiece 2 to be welded.

[0057] Specifically, the pressure strip 102 completes the initial pressing of the superimposed flow channel top plate 201 and the flat bottom plate 202 on the support plate 101, and then the vacuum assembly completes the vacuuming of the flow channel between the two plates. The initial pressing of the pressure strip 102 completes the initial pressing and positioning of the two plates of the workpiece 2 to be welded, and then the two plates of the workpiece 2 to be welded are pressed in place by negative pressure adsorption.

[0058] In more detail, the support plate 101 in the preferred embodiment includes a plate body 1011 whose size is larger than the size of the workpiece 2 to be welded, and its fixed end face for fixing the workpiece 2 to be welded is a flat end face, ensuring that the end face of the side of the flow channel top plate 201 where the flow channel is not opened can fit tightly on the support plate 101.

[0059] At the same time, corresponding to the arrangement of the working medium inlet 203 and the working medium outlet 204 on the flat bottom plate 202, it is also preferred that a pair of avoidance grooves 1012 are provided at one end of the support plate 101.Figure 3 As shown, the two relief grooves 1012 penetrate through both end faces and one end of the plate body 1011 respectively, and the opening width thereof is greater than the outer diameters of the two connecting pipes on the runner top plate 201. When the flat bottom plate 202 is attached to the support plate 101, the two connecting pipes at one end thereof just fit into the two relief grooves 1012. By providing the two relief grooves 1012, the relief during the pressing and fixing of the flat bottom plate 202 is accurately completed.

[0060] Furthermore, corresponding to the setting of the support plate 101, a pressing strip 102 detachably connected to the fixed end face of the support plate 101 is also provided. It is preferably a profiling structure arranged circumferentially. The area enclosed by the center line of the pressing strip 102 just corresponds to (equals to or is slightly larger than or slightly smaller than) the outer contour of the workpiece 2 to be welded. When the two plate bodies of the workpiece 2 to be welded are joined and butted and placed on the support plate 101 correspondingly, the pressing strip 102 can abut and press the outer peripheral edge (the flat part not being extruded) of the runner top plate 201 in the circumferential direction in the inner side area (relative to the center line of the pressing strip 102).

[0061] Correspondingly, a plurality of connecting members 103 are provided on the outer side area in the circumferential direction of the pressing strip 102 for the detachable connection between the pressing strip 102 and the support plate 101. In a preferred embodiment, the connecting members 103 are preferably locking screws that can pass through the pressing strip 102 and connect to the end face of the support plate 101 at the end.

[0062] Obviously, by correspondingly arranging a plurality of connecting members 103 between the pressing strip 102 and the support plate 101, a limiting space corresponding to the outer contour of the workpiece 2 to be welded can be enclosed on the support plate 101. This limiting space is slightly larger than the outer contour of the workpiece 2 to be welded and can limit the workpiece 2 to be welded in the length direction and width direction, ensuring the accuracy of the preliminary positioning of the workpiece 2 to be welded.

[0063] In actual setting, the pressing strip 102 is preferably composed of a plurality of circumferentially spliced structures. According to the size of the outer contour of the workpiece 2 to be welded, pressing strip segments of different forms and sizes can be correspondingly selected. More preferably, in a preferred embodiment, a plurality of connection holes are arranged in an array on the fixed end face of the support plate 101, and the connection positions of the respective connecting members 103 can be correspondingly selected according to the outer contour size of the workpiece 2 to be welded, thereby expanding the application range of the pressing tool 1.

[0064] Of course, in addition to the above setting forms, the support plate 101 can also be set in other forms according to needs. For example, in a specific preferred embodiment, a groove corresponding to the outer shape of the workpiece 2 to be welded is provided on the fixed end face of the plate body 1011, so that the runner top plate 201 and the flat bottom plate 202 to be welded can be embedded in the groove after being stacked, and the circumferential limit of the workpiece 2 to be welded is realized by this groove.

[0065] In addition, to ensure the consistent force on each area during the circumferential pressing of the workpiece 2 to be welded, the connecting members 103 in the preferred embodiment are arranged at equal intervals in the circumferential direction.

[0066] Moreover, in addition to the connection and locking method with the "connecting member 103" in the foregoing preferred embodiment, the pressing strip 102 in the preferred embodiment can also adopt other fixing methods according to needs, such as an electric pressing and fixing method or other methods, as long as the relative fixing of the pressing strip 102 on the support plate 101 can be achieved.

[0067] More specifically, the vacuum pumping assembly in the preferred embodiment is as Figure 1 shown in the figure, which includes a first connecting pipe 104, a second connecting pipe 105, a three-way joint 106, a third connecting pipe 107, and a vacuum machine 108. One ends of the three connecting pipes are respectively connected to the three interfaces of the three-way joint 106, and the other end of the first connecting pipe 104 can be firmly connected to the working fluid inlet 203, the other end of the second connecting pipe 105 can be firmly connected to the working fluid outlet 204, and the other end of the third connecting pipe 107 is connected to the vacuum machine 108.

[0068] Through the above settings, the vacuum machine 108 can perform a vacuum pumping operation on the flow channel of the workpiece 2 to be welded, so that the air pressure in the flow channel between the flow channel top plate 201 and the flat bottom plate 202 is lower than the atmospheric pressure outside the workpiece 2 to be welded, so that the flat bottom plate 202 can be reliably pressed against the end face of the flow channel top plate 201 where the flow channel is opened under the action of the external atmospheric pressure.

[0069] In the preferred embodiment, a combined scheme of "pressing strip 102 pressing + vacuum pumping assembly vacuum pressing" is adopted. The former completes the limiting and preliminary pressing after the alignment and stacking of the flow channel top plate 201 and the flat bottom plate 202, and the latter realizes the pressing of all the welding parts within the range of the surface of the flow channel top plate 201 and the end face of the flat bottom plate 202, so that after one pressing operation of the workpiece 2 to be welded, all the welding points can be in a uniformly stressed pressing state, and then all the welding points can be welded after one pressing operation, improving the welding efficiency and precision of the workpiece 2 to be welded.

[0070] During the actual welding operation process, the vacuum machine 108 preferably maintains the negative pressure in the flow channel at the same pressure value all the time to ensure the consistency during the processing of each welding point, thereby improving the processing quality and precision of the workpiece 2 to be welded.

[0071] Further preferably, after the connecting pipes of the working fluid inlet 203 and the working fluid outlet 204 are embedded in the avoidance groove 1012, the outer circumferences of the two connecting pipes do not protrude from the side of the support plate 101 away from the fixed end face, that is, the thickness of the support plate 101 is not less than the maximum value of the distance between the outer circumferences of the two connecting pipes and the end face of the flat bottom plate 202. With such a setting, it can be ensured that after the support plate 101 fixes the workpiece 2 to be welded, it can still be fixed flatly at the corresponding position.

[0072] However, the above approach will result in a relatively large thickness and self-weight of the support plate 101. Therefore, in a preferred embodiment, a plurality of weight-reducing grooves 1013 are provided on the end face of the support plate 101 away from the fixed end face, such as Figure 4 the 3 shown in [reference], with such a setting, while ensuring the thickness of the support plate 101, the self-weight of the support plate 101 is reduced, and the convenience of using the pressing tooling 1 is improved.

[0073] Furthermore, as another aspect of the preferred embodiment of the present invention, a welding system is further provided based on the pressing device in the foregoing preferred embodiment for laser welding between the flow channel top plate 201 and the flat bottom plate 202 after pressing.

[0074] For the welding system in the preferred embodiment, in addition to the foregoing pressing device, it further includes a welding device provided on the displacement mechanism. The welding device is further specifically a laser welding device, which can reciprocate in a planar area or a three-dimensional space under the drive of the displacement mechanism, and then align with different welding parts on the workpiece 2 to be welded respectively, so as to accurately complete the welding of all welding parts of the workpiece 2 to be welded.

[0075] During actual operation, a controller is preferably further provided for the displacement mechanism of the welding system. The controller is electrically connected to the displacement mechanism, and it can read the flow channel diagram inside the workpiece 2 to be welded and determine the welding parts on the workpiece 2 to be welded based on this. In this way, after the relative positioning of the welding device and the workpiece 2 to be welded is completed, the displacement mechanism can automatically operate under the control of the controller and realize the welding operation of all parts to be welded.

[0076] For the workpiece 2 to be welded in the preferred embodiment, it can uniformly press the entire plate surface welding area of the workpiece 2 to be welded, and on this basis, complete the welding preparation process of the workpiece 2 to be welded. The above welding process can be carried out by using the foregoing pressing device and welding system, or can also be realized by a deformed structure under the same design concept.

[0077] Based on the design concept of the foregoing pressing device and welding system, a welding process for liquid cooling plate welding is further proposed in the preferred embodiment of the present invention. The welding process includes the following steps:

[0078] (1) A support plate 101 is provided for fixing the workpiece 2 to be welded, and a pressure strip 102 is provided corresponding to the outer contour of the workpiece 2 to be welded;

[0079] (2) The cleaned and overlapped flow channel top plate 201 and the flat bottom plate 202 are pressed onto the support plate 101 by the pressure strip 102;

[0080] (3) A vacuum pumping assembly is provided to be connected to the working fluid inlet 203 and the working fluid outlet 204 of the workpiece 2 to be welded, respectively, so that the internal flow channel of the workpiece 2 to be welded is connected to the vacuum pumping assembly;

[0081] (4) Setting the welding device to perform full circumference welding of the outer peripheral area of ​​the workpiece 2 to be welded, and then controlling the vacuum pumping component to work, vacuuming the flow channel area of ​​the workpiece 2 to be welded to a set value, and controlling the welding device to complete the welding of each welding position in the middle area of ​​the workpiece 2 to be welded;

[0082] or

[0083] First, the vacuum pumping assembly is controlled to vacuum the flow channel area of ​​the workpiece 2 to be welded to a set value, and then the welding device is set to complete the welding of all welding positions of the workpiece to be welded.

[0084] More specifically, the following uses the aforementioned welding system as an example to specifically describe the welding process of the workpiece 2 to be welded in the preferred embodiment. The specific welding process is as follows:

[0085] (1) Clean the flow channel top plate 201 and the flat bottom plate 202 to be welded, and clean the components used for the initial pressing of the two plates, such as the support plate 101 and the pressure strip 102 in the preferred embodiment;

[0086] (2) Using the pressure strip 102 arranged in the annular direction, the superimposed flow channel top plate 201 and the flat bottom plate 202 are buckled and locked on the support plate 101; so that the pressure strip 102 is pressed and held in the annular direction.

[0087] For example, in a preferred embodiment, the flow channel top plate 201 and the plane bottom plate 202 are overlapped and held on the support plate 101 by the pressure strip 102 connected to the support plate 101 by a plurality of connectors 103. At this time, one end surface of the plane bottom plate 202 is in contact with the plate surface of the support plate 101, and the peripheral edge of one side of the workpiece 2 to be welded (specifically, the peripheral flat edge of the flow channel top plate 201 on the side away from the plane bottom plate 202) is pressed on the support plate 101 by the inner area of ​​the pressure strip 102. By tightening the connector 103 (locking screw) of the pressure strip 102, the initial position limiting and peripheral pressing of the workpiece 2 to be welded can be completed.

[0088] (3) Connect and set up a vacuum pumping assembly on the working fluid inlet 203 and the working fluid outlet 204 of the workpiece 2 to be welded, and control the vacuum pumping assembly to evacuate the internal flow channel of the workpiece 2 to be welded;

[0089] For example, in a preferred embodiment, the free ends of the first connecting pipe 104 and the second connecting pipe 105 are respectively connected to the working fluid inlet 203 and the working fluid outlet 204 of the workpiece 2 to be welded, forming a sealed vacuum pumping loop between the vacuum pumping assembly and the workpiece 2 to be welded. Then, through the vacuum pumping operation of the vacuum machine 108, the evacuation operation of the internal flow channel of the workpiece 2 to be welded can be completed.

[0090] (4) Control the movement of the welding device to perform welding operations at all welding positions of the workpiece 2 to be welded, thereby completing the welding preparation of the workpiece 2 to be welded.

[0091] In actual operation, in the preferred embodiment, the vacuum pumping operation is performed first and then the welding operations in each welding area are carried out.

[0092] In another preferred embodiment, after the pressing strip 102 is pressed, the welding device can be controlled to perform full circumferential welding of the peripheral area of the workpiece 2 to be welded first, and then the vacuum pumping assembly can be controlled to perform the vacuum pumping operation. Such an operation can further ensure the sealing performance of the flow channel space during the vacuum pumping operation and improve the vacuum pumping effect. After the vacuum degree inside the flow channel reaches the set value, the welding device is then controlled to perform full circumferential welding of the welding positions in the middle area of the workpiece 2 to be welded, and finally the welding preparation of the workpiece 2 to be welded is completed.

[0093] During the welding process of the welding device, the vacuum pumping assembly is preferably always in a working state, and the negative pressure state in the flow channel is maintained at the same value or within a certain value range to ensure the consistency of welding in each area.

[0094] After completing the welding operations of all welds, first stop the operation of the vacuum pumping assembly, then loosen the connection locks of each connecting piece 103, loosen the pressing strip 102, remove one side or all of the pressing strips 102, and finally take out the welded workpiece to complete the preparation of the liquid cooling plate.

[0095] The pressing device for liquid cooling plate welding in the present utility model has a simple structure and is convenient to use. It can uniformly press each welding part of the two plate bodies of the workpiece before the liquid cooling plate welding process, ensuring the consistency and reliability of the pressing force on each welding part during the liquid cooling plate welding process, ensuring the welding quality of each welding area in the subsequent welding process, thereby improving the manufacturing precision and efficiency of the liquid cooling plate and reducing the production cost and application cost of the liquid cooling plate.

[0096] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A clamping device for liquid cooling plate welding, used for clamping each welding area between the flow channel top plate and the plane bottom plate in the workpiece to be welded, characterized in that: include: A support plate having a fixed end surface capable of supporting and placing the planar bottom plate, and having avoidance grooves respectively provided at one end of the support plate corresponding to the working fluid inlet and the working fluid outlet at one end of the planar bottom plate, so as to realize the avoidance embedding of the working fluid inlet and the working fluid outlet when the planar bottom plate is pressed and fixed on the support plate; The pressure strip is a contoured structure arranged in the annular direction, and the shape of the area enclosed by the pressure strip corresponds to the outer contour of the workpiece to be welded, so that the superimposed flow channel top plate and the plane bottom plate can be pressed on the support plate by the inner area of ​​the pressure strip; The vacuum pumping assembly can be connected to the working fluid inlet and the working fluid outlet of the workpiece to be welded which is pressed on the support plate respectively, and is used to perform a vacuum operation on the flow channel area inside the workpiece to be welded, so that the plate surfaces of each welding area between the two plates of the workpiece to be welded are all pressed tightly.

2. The clamping device for liquid cooling plate welding according to claim 1, characterized in that: The vacuum pumping assembly includes a vacuum machine, a three-way joint, and a first connecting pipe, a second connecting pipe, and a third connecting pipe corresponding to the three-way joint; One end of the three connecting pipes is respectively connected to the three joints of the three-way joint; the other end of the first connecting pipe can be used to connect to the working fluid inlet, the other end of the second connecting pipe can be used to connect to the working fluid outlet, and the other end of the third connecting pipe is connected to the vacuum machine.

3. The clamping device for welding a liquid cooling plate according to claim 1 or 2, characterized in that: The outer area of ​​the pressure strip is detachably connected to the fixed end surface via a plurality of connecting pieces.

4. The clamping device for welding a liquid cooling plate according to claim 3, characterized in that: The pressure strip is composed of a multi-section structure spliced ​​circumferentially, and a plurality of connection holes are arranged in an array on the fixed end face. Different pressure strip sections can be selected according to the outer contour size of the workpiece to be welded and fixed on the fixed end face.

5. The clamping device for welding a liquid cooling plate according to claim 1, 2 or 4, characterized in that: The thickness of the support plate is not less than the maximum value of the distance between the outer periphery of the working fluid inlet, the outer periphery of the working fluid outlet and the end surface of the plane bottom plate.

6. The clamping device for welding a liquid cooling plate according to claim 5, characterized in that: A plurality of weight-reducing grooves are provided on an end surface of the support plate which is away from the fixed end surface.

7. The clamping device for welding a liquid cooling plate according to claim 1 or 2, characterized in that: A groove of a certain depth is provided on the fixed end surface corresponding to the outer contour of the workpiece to be welded, so that the flow channel top plate and the plane bottom plate to be welded can be embedded in the groove for positioning after being overlapped.

8. A welding system for welding a liquid cooling plate, characterized in that: The welding system comprises a clamping device for welding a liquid cooling plate as claimed in any one of claims 1 to 7; and The welding system also includes a welding device, which is connected to the displacement mechanism and can be moved back and forth above the clamping device under the drive of the displacement mechanism, so that the welding position of the welding device corresponds to the welding position of the workpiece to be welded clamped on the clamping device.

9. The welding system for liquid cooling plate welding according to claim 8, characterized in that: Also included is a controller electrically connected to the displacement mechanism; The controller is used to read the internal flow channel diagram of the workpiece to be welded, thereby determining the welding position on the workpiece to be welded and controlling the displacement mechanism to automatically operate.

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