Friction stir spot welding-seam welding hybrid welding liquid cooling plate equipment

Abstract

The utility model belongs to the technical field of liquid cooling plate welding, and particularly relates to friction stir spot welding-seam welding composite welding liquid cooling plate equipment. The workbench is used for containing a liquid cooling plate positioning table, the portal frame stretches across the workbench and can do reciprocating motion along the workbench, and first horizontal moving assemblies are horizontally arranged on the two sides of a cross beam of the portal frame respectively so that vertical moving assemblies can be loaded and act on the first horizontal moving assemblies; a friction stir welding spot welding device and a friction stir welding seam welding device are installed at the action ends of the two vertical moving assemblies arranged on the two sides of the cross beam correspondingly, and the welding working ends of the two devices both point to the table top of the workbench. The friction stir welding spot welding device and the friction stir welding seam welding device are arranged on the two sides of the portal frame respectively, so that the two welding devices can cooperatively weld and fix the liquid cooling plate, the size of the whole equipment is reduced, efficient and stable welding of the liquid cooling plate is achieved, and the production efficiency is improved. And the condition of thermal deformation of the liquid cooling plate in the welding process is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of liquid cooling plate welding technology, and in particular relates to a liquid cooling plate welding equipment for friction stir spot welding-seam welding composite welding. Background Technology

[0002] Liquid cooling plates are products used for heat dissipation, typically in high-performance computers, servers, and other applications requiring massive computation and data processing. Existing liquid cooling plates are assembled from a cover plate and a base plate; to prevent leakage, the cover plate and base plate need to be sealed and welded together.

[0003] Traditional liquid cooling plates are mainly produced by brazing. However, the brazing process requires heating the entire workpiece, which results in high energy consumption and pollution. Furthermore, the brazing process can only weld 3-series aluminum alloys. To ensure the overall strength of the 3-series aluminum alloy liquid cooling plate, thicker 3-series aluminum alloy plates are required, which leads to the large overall weight and high cost of the produced liquid cooling plate.

[0004] With the development of friction stir welding technology, friction stir welding is now widely used to produce liquid cooling plates, which can effectively reduce the production cost of liquid cooling plates. However, due to the existence of the liquid cooling plate flow channel, the use of friction stir welding alone can easily lead to large deformation of the liquid cooling plate. Even with the assistance of positioning and clamping fixtures, the deformation is still uncontrollable. During the welding process, the cover plate will still bulge and tear, causing the product to be scrapped. In addition, the installation of clamping fixtures is relatively complicated and will greatly increase the welding cost.

[0005] Therefore, there is an urgent need for a hybrid welding equipment for friction stir spot welding and seam welding of liquid-cooled plates to solve the above problems. Utility Model Content

[0006] To overcome the shortcomings of the prior art, this invention provides a composite welding equipment for liquid-cooled plates using friction stir spot welding and seam welding. This invention can weld thinner liquid-cooled plates (5-series aluminum alloys) without causing plate deformation, and is more compact, effectively improving welding efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A friction stir spot welding-seam welding composite welding equipment for liquid-cooled plates includes a worktable for placing a positioning platform for the liquid-cooled plate, and a gantry frame spanning the worktable and capable of reciprocating along the worktable. First horizontal moving components are arranged horizontally on both sides of the crossbeam of the gantry frame for loading and moving vertical moving components. The moving ends of the two sets of vertical moving components located on both sides of the crossbeam are respectively equipped with a friction stir spot welding device and a friction stir seam welding device, and the welding working ends of the two devices both point towards the worktable surface.

[0009] Preferably, a number of long strip-shaped fixing slots are spaced apart on the worktable, and the liquid cooling plate positioning table is installed on the fixing slots; a number of cold air pipes can also be detachably installed on the fixing slots, and each cold air pipe is arranged in sequence along the spot welding path of the friction stir welding device, and the air outlet of each cold air pipe points to the corresponding spot welding position.

[0010] Preferably, the workbench is provided with several long strip-shaped fixing grooves spaced apart, and the liquid cooling plate positioning table is installed on the fixing grooves; the liquid cooling plate positioning table is provided with several installation grooves along the spot welding path of the friction stir welding device, and the installation grooves are provided with detachable elastic nuts, the upper surface of the elastic nuts forming an elastic support surface for supporting the welding point of the liquid cooling plate from bottom to top.

[0011] Preferably, the mounting groove is an inverted T-shaped groove with a groove opening width smaller than the groove bottom width. The elastic nut includes a nut seat and a nut part that slides on the nut seat via a screw. A compression spring is fitted on the nut part so that the nut part can produce a vertical elastic reciprocating motion relative to the nut seat. A cooling cavity for containing coolant is provided inside the nut seat.

[0012] Preferably, the nut seat is provided with an inlet and an outlet that connect the external cold source and the cooling chamber.

[0013] Preferably, a number of positioning fixtures are detachably installed on the liquid cooling plate positioning platform, and the number of positioning fixtures are arranged at intervals along the periphery of the liquid cooling plate positioning platform.

[0014] Preferably, the device further includes a second horizontal moving component for driving the gantry to move horizontally and two bases for mounting the second horizontal moving component. The two bases are distributed on both sides of the length direction of the worktable, and the moving direction of the gantry is perpendicular to the moving direction of the vertical moving component.

[0015] Preferably, the first horizontal moving component includes a first motor and a first lead screw connected to the drive end of the first motor, with the end of the first lead screw away from the first motor mounted on the side wall of the gantry frame via a bushing.

[0016] Preferably, the vertical moving component is mounted on the moving base, and the moving base is threadedly connected to the first lead screw; the vertical moving component includes a third motor and a third lead screw connected to the drive end of the third motor; the friction stir welding spot welding device and the friction stir welding seam welding device are respectively fixed on two mounting seats, and the mounting seats are sleeved on the third lead screw and threadedly connected to the third lead screw.

[0017] Preferably, the second horizontal moving assembly includes a second motor and a second lead screw connected to the drive end of the second motor; the gantry frame is inverted "U" shape and consists of a crossbeam and two vertical beams, with the two vertical beams fixed to the two ends of the crossbeam respectively, and the bottom of the vertical beams threaded onto the second lead screw.

[0018] The advantages of this utility model are:

[0019] (1) This utility model, by setting a friction stir spot welding device and a friction stir seam welding device on both sides of a gantry frame, enables the two welding devices to work together to weld and fix the liquid cooling plate. The opposing design of the double welding devices on both sides of the crossbeam not only greatly reduces the size of the entire equipment, but also avoids the problems of cumbersome equipment and possible motion interference caused by using multiple gantry frames, effectively achieving efficient and stable welding of the liquid cooling plate and ensuring welding efficiency. The integrated welding technology of spot welding and seam welding equipment extended from the device of this utility model further avoids thermal deformation of the liquid cooling plate during the welding process, improves the yield, enables welding of thinner liquid cooling plates, greatly reduces the manufacturing cost, and effectively meets market demand.

[0020] (2) This utility model first uses spot welding process to fix the liquid cooling plate that is easy to warp, replacing the complex clamping tooling, and then uses friction stir welding process to realize the welding of various series of aluminum alloy materials. This utility model sets multiple moving components to realize the rapid movement of spot welding device and seam welding device, which facilitates the improvement of welding efficiency.

[0021] (3) This utility model is provided with several fixed slots to facilitate the adaptation of liquid cooling plate positioning platforms of different sizes, thereby facilitating the welding of liquid cooling plates of different sizes and increasing the applicability of this equipment; at the same time, cold air pipes can also be installed on the fixed slots along the welding path to facilitate the cooling of the liquid cooling plates during equipment welding, which can further prevent the liquid cooling plates from deforming.

[0022] (4) This utility model features a modularly installed elastic nut on the liquid-cooled plate positioning platform, which provides support during the operation of the friction stir welding spot welding device, improving the fit between the liquid-cooled plate and the liquid-cooled plate positioning platform, and further enhancing the stability of the spot welding. The elastic nut can be assembled using a conventional T-plate assembly process, i.e., directly fixed in the mounting groove with a tightening bolt, ensuring convenient disassembly and assembly and allowing for position adjustment for the spot welding location, making it more flexible and versatile. Furthermore, the elastic nut itself has an elastic reset support function, providing spot welding support while also allowing for the arrangement of a cooling chamber within the nut seat to address the high temperature at the spot welding point, achieving rapid cooling to ensure cooling effect. Rapid cooling at the spot welding point also reduces the time interval between spot welding and seam welding, further improving welding efficiency, achieving multiple benefits in one fell swoop.

[0023] (5) The present invention provides a positioning fixture adapted to the liquid cooling plate on the workbench, which can position the liquid cooling plate and ensure the smooth progress of spot welding, so as to better assist the welding to be completed smoothly. Moreover, there is no need to set up a clamping fixture, which simplifies the welding steps and improves the welding efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a side view of the present invention.

[0026] Figure 3 This is a front view structural diagram of the present utility model.

[0027] Figure 4 This is a top view of the structure of this utility model.

[0028] Figure 5 This is a schematic diagram of the installation of a flexible nut.

[0029] Figure 6 for Figure 5 A cross-sectional view of a medium-elasticity nut.

[0030] The meanings of the symbols in the diagram are as follows:

[0031] 1-Workbench, 2-Gantry frame, 3-Friction stir welding spot welding device, 4-Friction stir welding seam welding device, 5-Base, 6-First horizontal moving assembly, 7-Second horizontal moving assembly, 8-First motor, 9-First lead screw, 10-Second motor, 11-Second lead screw, 12-Vertical moving assembly, 13-Third motor, 14-Moving seat, 15-Mounting seat, 16-Shaft sleeve, 17-Fixing groove, 18-Crossbeam, 19-Vertical beam, 20-Cold air duct, 21-Liquid cooling plate positioning platform, 22-Elastic nut, 221-Nut seat, 222-Screw, 223-Nut part, 224-Compression spring, 225-Cooling chamber, 23-Mounting groove. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] like Figure 1-6As shown, an apparatus for composite welding of friction stir spot welding and friction stir seam welding liquid-cooled plates includes a first horizontal moving component 6 that drives the friction stir spot welding device 3 and the friction stir seam welding device 4 to move horizontally on a gantry 2, and a second horizontal moving component 7 that drives the gantry 2 to move horizontally on a base 5. The moving direction of the gantry 2 is perpendicular to the moving direction of the friction stir spot welding device 3 / friction stir seam welding device 4 on the gantry 2 in the horizontal plane, so that the friction stir spot welding device 3 / friction stir seam welding device 4 can be moved to any position on the workbench 1 on which a liquid-cooled plate positioning table 21 is placed. The positioning table 21 is used to place the liquid-cooled plate, which consists of a cover plate and a base plate. A vertical moving component 12 is also installed on the gantry 2 to drive the friction stir spot welding device 3 / friction stir seam welding device 4 to move vertically. The first horizontal moving component 6, the second horizontal moving component 7, and the vertical moving component 12 combine to form a moving device, realizing the movement of the friction stir spot welding device 3 / friction stir seam welding device 4 in three-dimensional space. The first horizontal moving component 6, the second horizontal moving component 7, the vertical moving component 12, the friction stir welding spot welding device 3, and the friction stir welding seam welding device 4 are all connected to the controller to achieve automated control of the equipment after input parameters.

[0034] Specifically, the workbench 1 has several elongated fixing slots 17 spaced apart along its length. The liquid-cooled plate positioning platform 21 is connected to the fixing slots 17 by bolts, thus fixing it to the workbench 1. The multiple fixing slots 17 facilitate the use of different sized liquid-cooled plate positioning platforms 21, thereby facilitating the welding of liquid-cooled plates of different sizes. Furthermore, several cooling air ducts 20 can be detachably installed on the fixing slots 17. The cooling air ducts 20 are arranged along the spot welding path of the friction stir welding device 3, allowing the device to be cooled during operation, further preventing deformation of the liquid-cooled plate. Several mounting slots 23 are arranged on the liquid-cooled plate positioning platform 21 along the spot welding path of the friction stir welding device 3. Removable elastic nuts 22 are installed in the mounting slots 23, allowing the corresponding elastic nuts 22 to be fitted as needed during operation of the friction stir welding device 3.

[0035] like Figure 5-6As shown, the mounting groove 23 is an inverted T-shaped groove with a groove opening width smaller than the groove bottom width. The elastic nut 22 consists of a nut seat 221, a screw 222, a nut part 223, and a compression spring 224 sleeved on the nut part 223. The screw 222 is fixed to the bottom of the nut part 223. The nut seat 221 has a sliding groove, and the screw 222 is limited in the sliding groove by a limiting block and slides in the sliding groove, so that the nut part 223 slides on the nut seat, so that the nut part 223 can produce a vertical elastic reciprocating motion relative to the nut seat 221. During installation, the nut seat 221 has threaded holes on both sides, and the nut seat 221 is fixed in the mounting groove 23 using pre-tightening bolts. The nut seat 221 is provided with a cooling chamber 225 for containing coolant. The nut seat 221 is provided with an inlet and an outlet for connecting an external cold source to the cooling chamber, which facilitates cooling of the spot welding position during spot welding.

[0036] Two bases 5 are provided, located on opposite sides of the worktable 1 in the same direction. Each base 5 is equipped with a second horizontal moving assembly 7, which includes a second motor 10 and a second lead screw 11. The second motor 10 is fixedly installed at the end of the base 5, and one end of the second lead screw 11 is connected to the output end of the second motor 10. The rod body is arranged along the length of the base 5. The two ends of the gantry 2 are respectively sleeved on the two second lead screws 11 and threadedly connected to the second lead screws 11, so that when the second motor 10 works, it drives the second lead screw 11 to rotate, thereby driving the gantry 2 to move along the length of the base 5, that is, the entire gantry 2 moves above the worktable 1, and further drives the friction stir welding spot welding device 3 and the friction stir welding seam welding device 4 on the gantry 2 to move.

[0037] Furthermore, the gantry frame 2 is inverted "U" shape, including a crossbeam 18 and two vertical beams 19. The two vertical beams 19 are fixed to both ends of the crossbeam 18, and the bottom of the vertical beams 19 is threaded onto the second lead screw 11, so that the entire gantry frame 2 is mounted on the workbench 1. A first horizontal moving assembly 6 is installed on both sides of the gantry frame 2. The first horizontal moving assembly 6 includes a first motor 8 and a first lead screw 9. The first motor 8 is installed at one end of the crossbeam 18, and one end of the first lead screw 9 is connected to the output end of the first motor 8. The other end of the first lead screw 11 is installed at the other end of the crossbeam 18 along the beam length direction through a bushing 16, so that the first motor 8 drives the first lead screw 9 to rotate when it is working. The friction stir welding spot welding device 3 and the friction stir welding seam welding device 4 are respectively threaded to the two first lead screws 9 through the vertical moving component 12, so that when the first lead screw 9 rotates under the drive of the first motor 8, it drives the friction stir welding spot welding device 3 and the friction stir welding seam welding device 4 to move along the length of the first lead screw 9.

[0038] Alternatively, a first horizontal moving component 6 can be set up, with the friction stir welding spot welding device 3 (or friction stir welding seam welding device 4) set on one side of the gantry 2 via the first horizontal moving component 6, and the friction stir welding seam welding device 4 (or friction stir welding spot welding device 3) on the other side sleeved on the sliding rod. The sliding rod is fixed on the other side of the gantry 2, and the friction stir welding spot welding device 3 and the friction stir welding seam welding device 4 are connected by a connecting rod, etc., so that when the first horizontal moving component 6 moves the friction stir welding spot welding device 3 (or friction stir welding seam welding device 4), the friction stir welding seam welding device 4 (or friction stir welding spot welding device 3) moves accordingly.

[0039] Furthermore, the vertical moving assembly 12 includes a third motor 13 and a third lead screw. The third motor 13 is mounted on the moving base 14, one end of the third lead screw is connected to the drive end of the third motor 13, and the other end of the third lead screw is mounted on the moving base 14 in the vertical direction. A mounting base 15 is threaded onto the third lead screw, and welding devices (i.e., friction stir welding spot welding device 3 and friction stir welding seam welding device 4) are mounted on the mounting base 15.

[0040] Several positioning fixtures are arranged around the edge of the workbench 1. The positioning fixtures can be detachably installed on the workbench 1 and are arranged at intervals to facilitate the positioning of the liquid cooling plate.

[0041] Specifically, the welding of 5-series aluminum alloy liquid-cooled plates using the aforementioned equipment follows these steps:

[0042] S1. Place the base plate of the 5-series aluminum alloy liquid cooling plate on the workbench 1, then assemble the cover plate of the 5-series aluminum alloy liquid cooling plate onto the base plate, and position it using a positioning fixture (which can be a clamp).

[0043] S2. First, start the spot welding mode of the equipment. The spot welding spindle of the friction stir welding spot welding device 3 starts to run. The non-flow channel part of the 5-series aluminum alloy liquid cooling plate is spot welded through the moving device, so that the cover plate and the bottom plate of the 5-series aluminum alloy liquid cooling plate are spot welded and fixed. When spot welding and fixing, spot welding can be carried out from the middle to the edge in sequence.

[0044] S3. After spot welding is completed, start the seam welding mode of the equipment. The friction stir welding seam welding device 4 performs seam welding on the non-flow channel part of the 5-series aluminum alloy liquid cooling plate along the seam welding path through the moving device, and makes the seam weld completely cover the spot weld, thus completing the welding of the 5-series aluminum alloy liquid cooling plate.

[0045] The welding equipment of this invention is applicable to the butt joint and lap joint of any two or more layers of metal materials, as well as the welding of products with lap joint structures by first performing friction stir spot welding and then friction stir seam welding.

[0046] It should be noted that, in addition to the solution in this utility model, the friction stir welding spot welding device 3 and the friction stir welding seam welding device 4 can also be distributed on the same side of the gantry beam.

[0047] Alternatively, the welding method in this invention can also be achieved using a combination of friction stir spot welding equipment and friction stir welding equipment. When using a combination of friction stir spot welding equipment and friction stir welding equipment, spot welding can be performed first, followed by seam welding, or spot welding can be performed first, followed by seam welding after a certain time, and then welding can be performed simultaneously along the trajectory.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for composite welding of liquid-cooled plates using friction stir spot welding and seam welding, characterized in that: The system includes a workbench (1) for placing a liquid cooling plate positioning stage (21) and a gantry frame (2) that spans across the workbench (1) and can reciprocate along the workbench (1). The first horizontal moving component (6) is arranged horizontally on both sides of the crossbeam (18) of the gantry frame (2) for loading and moving the vertical moving component (12). The moving ends of the two sets of vertical moving components (12) placed on both sides of the crossbeam (18) are respectively equipped with a friction stir welding spot welding device (3) and a friction stir welding seam welding device (4), and the welding working ends of the two devices both point to the workbench (1) table surface.

2. The equipment for composite welding of friction stir spot welding and seam welding of liquid-cooled plates according to claim 1, characterized in that: The workbench (1) is provided with several long strip-shaped fixed grooves (17) spaced apart, and the liquid cooling plate positioning table (21) is installed on the fixed groove (17); several cold air pipes (20) are also detachably installed on the fixed groove (17), and each cold air pipe (20) is arranged in sequence along the spot welding path of the friction stir welding spot welding device (3), and the air outlet of each cold air pipe (20) points to the corresponding spot welding position.

3. The equipment for composite welding of friction stir spot welding and seam welding of liquid-cooled plates according to claim 1, characterized in that: The workbench (1) is provided with several long strip-shaped fixing grooves (17) spaced apart, and the liquid cooling plate positioning table (21) is installed on the fixing grooves (17); the liquid cooling plate positioning table (21) is provided with several mounting grooves (23) along the spot welding path of the friction stir welding device (3), and the mounting grooves (23) are provided with detachable elastic nuts (22), and the upper surface of the elastic nuts (22) forms an elastic support surface for supporting the welding point of the liquid cooling plate from bottom to top.

4. The equipment for composite welding of liquid-cooled plates by friction stir spot welding and seam welding according to claim 3, characterized in that: The mounting groove (23) is an inverted T-shaped groove with a groove opening width smaller than the groove bottom width. The elastic nut (22) includes a nut seat (221) and a nut part (223) that is slidably fitted on the nut seat (221) via a screw (222). A compression spring (224) is fitted on the nut part (223) so that the nut part (223) can produce a vertical elastic reciprocating motion relative to the nut seat (221). A cooling chamber (225) for containing coolant is provided inside the nut seat (221).

5. The equipment for composite welding of liquid-cooled plates by friction stir spot welding and seam welding according to claim 4, characterized in that: The nut seat (221) is provided with an inlet and an outlet that connect the external cold source and the cooling chamber.

6. A liquid-cooled plate welding equipment for friction stir spot welding and seam welding according to claim 1, 2, 3, or 4, characterized in that: The liquid cooling plate positioning platform (21) is detachably equipped with several positioning fixtures, which are arranged at intervals along the periphery of the liquid cooling plate positioning platform (21).

7. A liquid-cooled plate welding equipment for friction stir spot welding and seam welding according to claim 1, 2, 3, or 4, characterized in that: The device also includes a second horizontal moving assembly (7) for driving the gantry (2) to move horizontally and two bases (5) for mounting the second horizontal moving assembly (7). The two bases (5) are distributed on both sides of the length direction of the workbench (1). The moving direction of the gantry (2) is perpendicular to the moving direction of the vertical moving assembly (12).

8. A liquid-cooled plate welding equipment for friction stir spot welding and seam welding according to claim 1, 2, 3, or 4, characterized in that: The first horizontal moving component (6) includes a first motor (8) and a first lead screw (9) connected to the drive end of the first motor (8). The end of the first lead screw (9) away from the first motor (8) is mounted on the side wall of the gantry (2) through a bushing (16).

9. The equipment for composite welding of friction stir spot welding and seam welding of liquid-cooled plates according to claim 8, characterized in that: The vertical moving component (12) is mounted on the moving seat (14), and the moving seat (14) is threadedly connected to the first lead screw (9); the vertical moving component (12) includes a third motor (13) and a third lead screw connected to the drive end of the third motor (13); the friction stir welding spot welding device (3) and the friction stir welding seam welding device (4) are respectively fixed on two mounting seats (15), and the mounting seats (15) are sleeved on the third lead screw and threadedly connected to the third lead screw.

10. The equipment for composite welding of friction stir spot welding and seam welding of liquid-cooled plates according to claim 7, characterized in that: The second horizontal moving component (7) includes a second motor (10) and a second lead screw (11) connected to the drive end of the second motor (10); the gantry (2) is in the shape of an inverted "U" and consists of a crossbeam (18) and two vertical beams (19). The two vertical beams (19) are respectively fixed to the two ends of the crossbeam (18), and the bottom of the vertical beam (19) is threaded onto the second lead screw (11).

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