Welding fixture
By designing a welding fixture with a movable connecting pressure plate and a sliding groove limiting structure, the problem of poor adaptability of existing fixtures was solved, enabling flexible clamping and efficient welding of workpieces of different specifications, reducing costs and improving welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RAYCUS FIBER LASER TECH CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-07
AI Technical Summary
Existing welding fixtures cannot be adapted to workpieces of different specifications, resulting in increased costs and insufficient welding strength and sealing.
A welding fixture including a base, a first pressure plate, and a second pressure plate is designed. The workpiece to be welded is clamped by the first and second pressure plates, which are movably connected. Combined with the design of the sliding groove and the limiting component, it can flexibly clamp and release workpieces of different specifications, and ensure pressure and sealing during the welding process.
It improves the applicability of welding fixtures, ensures the welding strength and sealing of workpieces of different specifications, and reduces the cost of specially made fixtures.
Smart Images
Figure CN224465312U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding, specifically to a welding fixture. Background Technology
[0002] Plastic welding is widely used in the processing industry. Currently, plastic products are diverse in type and shape, especially transparent and irregularly shaped plastics. White or transparent plastics are widely used in medical devices and food packaging, which places higher demands on plastic welding. Plastic welding, especially laser plastic welding, requires not only appropriate process parameters but also the application of pressure during and after welding to ensure weld strength and sealing. However, since customer samples are often non-standard, existing welding fixtures cannot accommodate various sample sizes, while custom-made fixtures for specific products would increase costs. Utility Model Content
[0003] This application provides a welding fixture that can solve the problem that existing welding fixtures cannot be adapted to workpieces of different specifications.
[0004] This application provides a welding fixture, including:
[0005] The base has a mounting groove.
[0006] The first pressure plate is movably connected to the base along a first direction;
[0007] The second pressure plate is located in the mounting groove. The second pressure plate and the first pressure plate are arranged along the second direction. The second pressure plate is used to support the workpiece to be welded. The second pressure plate and the base are movably connected along the second direction. The second direction forms an angle with the first direction. The second pressure plate and the first pressure plate are used to clamp or release the workpiece to be welded.
[0008] Optionally, in some embodiments of this application, the base includes two first sidewalls disposed opposite to each other along the first direction, one of the first sidewalls having a first groove, the first groove penetrating the first sidewall along the first direction, the first pressure plate being inserted into the first groove and sliding relative to the base along the first groove in the first direction.
[0009] Optionally, in some embodiments of this application, the mounting groove includes two second sidewalls disposed opposite to each other along a third direction, the second sidewalls being connected between the two first sidewalls, and a second sliding groove being provided on the side of the second sidewall facing the mounting groove, the second sliding groove extending along the first direction, and the first pressure plate sliding relative to the base along the second sliding groove in the first direction; the third direction, the first direction, and the second direction form an angle with each other.
[0010] Optionally, in some embodiments of this application, the base includes two first sidewalls disposed opposite to each other along the first direction, a third sliding groove is provided on the first sidewall, the third sliding groove passes through the first sidewall along the first direction, and the third sliding groove extends along the second direction; the second pressure plate slides relative to the base along the third sliding groove in the second direction.
[0011] Optionally, in some embodiments of this application, two third grooves are formed on the first sidewall, and the two third grooves are distributed along a third direction; the third direction, the first direction, and the second direction form an angle with each other.
[0012] Optionally, in some embodiments of this application, the welding fixture includes a first limiting member, which is movably connected to the second pressure plate, and the first limiting member is used to limit the position of the second pressure plate relative to the base.
[0013] Optionally, in some embodiments of this application, the first limiting member includes an adjusting position and a locking position; when the first limiting member is in the adjusting position, the second pressure plate can slide relative to the base in the second direction along the third sliding groove; when the first limiting member is in the locking position, the first limiting member is used to limit the position of the second pressure plate relative to the base.
[0014] Optionally, in some embodiments of this application, the second pressure plate includes a first sub-plate and a second sub-plate stacked along the second direction, the first sub-plate having a cooling channel, the first sub-plate being used to support the workpiece to be welded, and the second sub-plate being movably connected to the base.
[0015] Optionally, in some embodiments of this application, the welding fixture further includes a second limiting member, which is connected to the second pressure plate. The second limiting member is at least partially located on the side of the second pressure plate facing the first pressure plate, and is used to limit the position of the workpiece to be welded on the second pressure plate.
[0016] Optionally, in some embodiments of this application, the welding fixture includes a plurality of second limiting members, which are arranged circumferentially along the second pressure plate.
[0017] In this embodiment, the welding fixture includes a base, a first pressure plate, and a second pressure plate. The base has a mounting groove. The first pressure plate is movably connected to the base along a first direction. The second pressure plate is located within the mounting groove and is positioned along a second direction with the first pressure plate. The second pressure plate is used to support the workpiece to be welded. The second pressure plate is movably connected to the base along the second direction, which forms an angle with the first direction. The second pressure plate and the first pressure plate are used to clamp or release the workpiece to be welded. This application utilizes the first and second pressure plates, which are movable relative to the base, to clamp the workpiece to be welded, making the placement of the workpiece within the welding fixture more flexible and convenient. By adjusting the relative positions of the second and first pressure plates, clamping or releasing workpieces of different specifications can be achieved, thereby improving the applicability of the welding fixture. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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 schematic diagram of the structure of a welding fixture provided in an embodiment of this application;
[0020] Figure 2 This is a schematic diagram of the structure of a welding fixture after the first pressure plate is removed, according to an embodiment of this application.
[0021] Figure 3 This is a welding schematic diagram provided in an embodiment of this application;
[0022] Figure 4 This is a flowchart of a welding method using a welding fixture provided in an embodiment of this application.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Welding fixtures;
[0025] 10. Base; 11. Mounting groove; 12. First sidewall; 13. First slide groove; 14. Second sidewall; 15. Second slide groove; 16. Third slide groove; 17. Dust extraction hole;
[0026] 20. First pressure plate;
[0027] 30. Second pressure plate; 31. First sub-plate; 32. Second sub-plate;
[0028] 40. First limiting component;
[0029] 50. Second limiting component;
[0030] 2. Welding platform; 3. Collimation assembly; 4. Galvanometer; 5. Field lens;
[0031] X, first direction; Y, second direction; Z, third direction. Detailed Implementation
[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.
[0033] This application provides a welding fixture and a welding method, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.
[0034] First, this application provides a welding fixture, such as... Figure 1 and Figure 2 As shown, the welding fixture 1 includes a base 10, which has a mounting groove 11. The base 10 serves as the base structure of the welding fixture 1 and is used to ensure the overall structural stability of the welding fixture 1 and the stability of the welding process.
[0035] The welding fixture 1 includes a first pressure plate 20 and a second pressure plate 30. The first pressure plate 20 is movably connected to the base 10 along the first direction X. The second pressure plate 30 is located in the mounting groove 11. The second pressure plate 30 and the first pressure plate 20 are arranged along the second direction Y. The second pressure plate 30 is used to support the workpiece to be welded. The second pressure plate 30 and the base 10 are movably connected along the second direction Y. The second direction Y forms an angle with the first direction X. The second pressure plate 30 and the first pressure plate 20 are used to clamp or release the workpiece to be welded.
[0036] The first pressure plate 20 and the second pressure plate 30 are arranged vertically, i.e., the second direction is vertical and the first direction X is horizontal. Before welding, the workpiece to be welded is placed on the second pressure plate 30. By adjusting the position of the second pressure plate 30 along the second direction Y, the welding position and the welding pressure of the welding fixture 1 can be adjusted to meet different welding requirements. Setting the first pressure plate 20 to be movable in the horizontal direction facilitates the placement and removal of the workpiece to be welded during the welding process.
[0037] It should be noted that the first pressure plate 20 is a light-transmitting pressure plate. During the welding process, the welding laser needs to pass through the first pressure plate 20 to irradiate the workpiece to be welded, which is located on the second pressure plate 30. When the first pressure plate 20 moves along the first direction X, the first pressure plate 20 can be directly pulled out from the base 10, so as to facilitate the replacement of the first pressure plate 20 according to the welding situation.
[0038] In some embodiments, the base 10 includes two first sidewalls 12 disposed opposite to each other along a first direction X. One of the first sidewalls 12 has a first groove 13 extending through it along the first direction X. A first pressure plate 20 is partially inserted into the first groove 13 and slides relative to the base 10 along the first groove 13 in the first direction X. That is, the first pressure plate 20 can be inserted into or removed from the mounting slot 11 through the first groove 13 to form a drawer-type structure, which facilitates the placement of the workpiece to be welded and the replacement of the first pressure plate 20. The first groove 13 can also be used to position the first pressure plate 20.
[0039] In some embodiments, the mounting groove 11 includes two second sidewalls 14 disposed opposite each other along a third direction Z. The second sidewalls 14 are connected between two first sidewalls 12. A second sliding groove 15 is formed on the side of the second sidewall 14 facing the mounting groove 11. The second sliding groove 15 extends along a first direction X. The first pressure plate 20 slides relative to the base 10 along the second sliding groove 15 in the first direction X. That is, the second sliding groove 15 forms a sliding rail for the first pressure plate 20. After the first pressure plate 20 is inserted into the mounting groove 11 through the first sliding groove 13, it will slide along the second sliding groove 15 in the mounting groove 11. The second sliding groove 15 is used to orient the sliding direction of the first pressure plate 20 to ensure the smoothness of the sliding process of the first pressure plate 20; at the same time, the second sliding groove 15 can also support the first pressure plate 20 to ensure the stability of the first pressure plate 20 during the sliding process.
[0040] In addition, the second slide 15 can also limit the first pressure plate 20. When the first pressure plate 20 and the second pressure plate 30 clamp the workpiece to be welded together, the second slide 15 can restrict the first pressure plate 20 from moving in the second direction Y, thereby ensuring that the workpiece to be welded has sufficient pressure during the welding process to ensure welding strength and sealing.
[0041] In this context, the third direction Z, the first direction X, and the second direction Y form an angle with each other. For example, the third direction Z, the first direction X, and the second direction Y can be perpendicular to each other.
[0042] In some embodiments, the base 10 includes two first sidewalls 12 disposed opposite to each other along a first direction X. A third groove 16 is provided on the first sidewall 12. The third groove 16 passes through the first sidewall 12 along the first direction X and extends along the second direction Y, that is, the third groove 16 is a vertical groove. The second pressure plate 30 slides relative to the base 10 along the third groove 16 in the second direction Y, that is, the second pressure plate 30 can slide along the third groove 16 in the vertical direction to adjust the position of the workpiece to be welded in the mounting groove 11.
[0043] During welding, the second pressure plate 30 needs to be slid towards the first pressure plate 20 first, so that the second pressure plate 30 and the first pressure plate 20 together clamp the workpiece to be welded, so as to ensure that the workpiece to be welded has sufficient pressure during the welding process; after welding is completed, the second pressure plate 30 is slid away from the first pressure plate 20, so that the second pressure plate 30 and the first pressure plate 20 release the workpiece to be welded, so as to facilitate the removal of the workpiece to be welded.
[0044] It should be noted that the length of the third slide groove 16 directly affects the sliding range of the second pressure plate 30. When the third slide groove 16 is opened, it is necessary to ensure that after the workpiece to be welded is placed on the second pressure plate 30, the second pressure plate 30 can slide along the third slide groove 16 to clamp the workpiece to be welded together with the first pressure plate 20, so as to ensure that the workpiece to be welded has sufficient pressure during the welding process, thereby ensuring welding strength and sealing.
[0045] In some examples, two third sliding grooves 16 are provided on the first sidewall 12. The two third sliding grooves 16 are distributed along the third direction Z. That is, the second pressure plate 30 slides relative to the base 10 in the second direction Y through the two parallel third sliding grooves 16, so as to improve the stability of the second pressure plate 30 during the sliding process.
[0046] In this context, the third direction Z, the first direction X, and the second direction Y form an angle with each other. For example, the third direction Z, the first direction X, and the second direction Y can be perpendicular to each other.
[0047] It should be noted that the third grooves 16 on the two first sidewalls 12 are symmetrically arranged, that is, the two ends of the second pressure plate 30 are respectively partially inserted into the third grooves 16 on the corresponding first sidewalls 12 along the first direction X, so that the two ends of the second pressure plate 30 slide relative to the base 10 along the third grooves 16 in the second direction Y, so as to further improve the stability of the second pressure plate 30 during the sliding process.
[0048] In some embodiments, the welding fixture 1 includes a first limiting member 40, which is movably connected to the second pressure plate 30. The first limiting member 40 is used to limit the position of the second pressure plate 30 relative to the base 10. That is, when the second pressure plate 30 moves relative to the base 10, the first limiting member 40 is used to limit the moving position of the second pressure plate 30 to ensure the stability of the second pressure plate 30 during the welding process.
[0049] The first limiting member 40 includes an adjusting position and a locking position. When the first limiting member 40 is in the adjusting position, the second pressure plate 30 can slide relative to the base 10 along the third slide groove 16 in the second direction Y. When the first limiting member 40 is in the locking position, it limits the position of the second pressure plate 30 relative to the base 10. That is, when the first limiting member 40 is in the adjusting position, it releases the restriction on the position of the second pressure plate 30, allowing the second pressure plate 30 to slide relative to the base 10 along the third slide groove 16 in the second direction Y, thereby adjusting the second pressure plate 30 to a suitable welding position. After the second pressure plate 30 is adjusted to the suitable position, the first limiting member 40 locks onto the second pressure plate 30 to limit the position of the second pressure plate 30 relative to the base 10, thus ensuring the stability of the second pressure plate 30 during the welding process.
[0050] It should be noted that the first limiting member 40 can be a bolt, and correspondingly, the second pressure plate 30 has a threaded hole. The first limiting member 40 is movably connected to the second pressure plate 30 through the mutual cooperation of the bolt and the threaded hole. When the first limiting member 40 is in the locked position, the bolt passes through the third sliding groove 16 and is screwed into the threaded hole, and tightly abuts against the first side wall 12 of the base 10 to lock the second pressure plate 30 to the base 10. When the first limiting member 40 is in the adjustable position, the bolt is loosened in the reverse direction from the threaded hole, and the bolt is disconnected from the first side wall 12 of the base 10, so that the second pressure plate 30 can slide relative to the base 10 along the third sliding groove 16, thereby adjusting the position of the second pressure plate 30.
[0051] In some embodiments, the second pressure plate 30 includes a first sub-plate 31 and a second sub-plate 32 stacked along the second direction Y. The first sub-plate 31 has a cooling channel and is used to support the workpiece to be welded. The second sub-plate 32 is movably connected to the base 10. That is, the first sub-plate 31 is a cooling plate used to cool the workpiece to be welded during the welding process. This is because when the workpiece is laser-welded, the first sub-plate 31 located below it is heated, and the heat generated is conducted to the workpiece, causing deformation of the workpiece. By providing a cooling channel in the first sub-plate 31, the heat generated by laser irradiation in the first sub-plate 31 can be effectively removed during the welding process, thereby effectively preventing deformation of the workpiece and ensuring the welding effect of the workpiece.
[0052] The first sub-board 31 is provided with a water inlet and a water outlet, which are used to connect to external cooling equipment. Through the flow of the cooling medium in the cooling channel, the heat generated by the laser irradiation on the first sub-board 31 can be quickly and effectively removed, thereby effectively preventing the workpiece to be welded from deforming and ensuring the welding effect of the workpiece to be welded.
[0053] It should be noted that when the second pressure plate 30 is composed of the first sub-plate 31 and the second sub-plate 32 stacked together, the first limiting member 40 is movably connected to the second sub-plate 32, that is, the threaded hole is correspondingly set on the second sub-plate 32, so as to avoid interference between the cooling medium communication channel of the first limiting member 40 and the first sub-plate 31, thereby ensuring the stability of the second pressure plate 30 during the welding process while ensuring the cooling effect of the first sub-plate 31.
[0054] The second sub-plate 32 is a rubber layer. During the process of the second pressure plate 30 sliding along the third slide groove 16 relative to the base 10, the second pressure plate 30 may collide with the bottom of the mounting groove 11 or the bottom of the third slide groove 16. At this time, the second sub-plate 32 can play an elastic buffering role to avoid damage to the second pressure plate 30 due to the collision.
[0055] In some embodiments, the welding fixture 1 further includes a second limiting member 50, which is connected to the second pressure plate 30. The second limiting member 50 is at least partially located on the side of the second pressure plate 30 facing the first pressure plate 20, and is used to limit the position of the workpiece to be welded on the second pressure plate 30. That is, the second limiting member 50 is at least partially disposed on the side of the second pressure plate 30 facing the first pressure plate 20 and protrudes from the side of the second pressure plate 30 facing the first pressure plate 20. After the workpiece to be welded is placed on the second pressure plate 30, an elastic band can be bound to the corresponding second limiting member 50 according to the shape of the workpiece to be welded. The elastic band can deform according to the shape of the workpiece to be welded to help fix the irregular structure of the workpiece to be welded.
[0056] It should be noted that the welding fixture 1 includes multiple second limiting members 50, which are arranged circumferentially along the second pressure plate 30. In the actual welding process, the elastic band can be bound to the corresponding second limiting member 50 according to the specific structure of the workpiece to be welded, so as to limit the irregular structure of the workpiece to be welded, improve the stability of the workpiece to be welded in the welding process, and thus improve the welding effect.
[0057] In some embodiments, a dust extraction hole 17 is also provided on the first sidewall 12. The dust extraction hole 17 is used to connect to a dust extraction device to remove the fumes generated during the welding process, so as to avoid the generation of particle residue on the workpiece during or after the welding process, thereby ensuring the final welding effect and aesthetics, and also reducing the pollution generated in the mounting groove 11 of the base 10 during the welding process.
[0058] Secondly, this application embodiment also provides a welding method, which uses the welding fixtures in the above embodiments, such as... Figure 3 and Figure 4 As shown, the welding method mainly includes the following steps:
[0059] S100. Place the welding fixture 1 on the welding platform 2; the welding platform 2 is equipped with a laser, a collimation component 3, a galvanometer 4, and a field lens 5.
[0060] Before welding, the welding fixture 1 needs to be placed on the welding platform 2. The welding platform 2 is equipped with a laser, a collimating component 3, a galvanometer 4, and a field lens 5. The welding fixture 1 is placed below the field lens 5. The laser is used to emit a laser beam, the collimating component 3 is used to adjust the divergence angle of the laser beam so that the laser beam spot meets the welding requirements, the galvanometer 4 is used to adjust the welding path of the laser beam, and the field lens 5 is used to focus the laser beam so that the energy of the laser beam is concentrated on the welding position.
[0061] Among them, a 2µm thulium-doped laser can be selected as the laser, which, when paired with a galvanometer 4, can weld plastics with a light transmittance of 20%-100%.
[0062] S200. Open the first pressure plate 20 of the welding fixture 1 and place the workpiece to be welded on the second pressure plate 30 of the welding fixture 1.
[0063] S300. Close the first pressure plate 20 and adjust the position of the second pressure plate 30 so that the second pressure plate 30 and the first pressure plate 20 clamp the workpiece to be welded.
[0064] Before welding, the workpiece to be welded needs to be placed in the welding fixture 1. First, the first pressure plate 20 is slid out of the mounting groove 11 of the base 10 along the first slide groove 13 and the second slide groove 15, and then the workpiece to be welded is placed on the second pressure plate 30. Next, the first pressure plate 20 is slid into the mounting groove 11 along the first slide groove 13 and the second slide groove 15, and the second pressure plate 30 is slid upward along the third slide groove 16 until the workpiece to be welded abuts and is pressed against the first pressure plate 20, thereby clamping the workpiece to be welded between the first pressure plate 20 and the second pressure plate 30.
[0065] S400. Turn on the laser so that the laser beam emitted by the laser passes through the collimation component 3, the galvanometer 4 and the field mirror 5 in sequence, passes through the first pressure plate 20, and irradiates the workpiece to be welded.
[0066] After the workpiece to be welded is placed, the laser is turned on. The laser beam emitted by the laser first reaches the collimation component 3. The collimation component 3 is equipped with a screw adjuster for fine-tuning the collimation height, ensuring that the laser beam falls completely within the collimating lens and that the laser spot meets the welding requirements. Next, the laser beam is reflected by the collimation component 3 to the galvanometer 4. The motor inside the galvanometer 4 controls the deflection of the two lenses, allowing the laser beam to swing into different shapes to form different welding paths and meet different welding requirements. After being adjusted by the galvanometer 4, the laser beam is transmitted to the field lens 5, where it is focused to concentrate the energy of the laser beam onto the welding position, thus achieving the welding of the workpiece.
[0067] During the welding process, welding parameters can be adjusted, such as setting the welding power to 40W, the welding speed to 40mm / s, controlling the oscillation shape of the laser beam to be circular, and the oscillation width to 1mm, etc. The specific parameter values can be selected and adjusted according to the actual welding requirements, and there are no special restrictions here.
[0068] After welding is completed, the second pressure plate 30 is moved downward along the third slide groove 16 to separate the workpiece on the second pressure plate 30 from the first pressure plate 20. Then the first pressure plate 20 slides out of the mounting groove 11 along the first slide groove 13 and the third slide groove 16. Next, the welded workpiece is taken out of the mounting groove 11, thus completing the entire welding process.
[0069] The above provides a detailed description of a welding fixture and welding method provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A welding fixture, characterized in that, include: The base has a mounting groove. The first pressure plate is movably connected to the base along a first direction; The second pressure plate is located in the mounting groove. The second pressure plate and the first pressure plate are arranged along the second direction. The second pressure plate is used to support the workpiece to be welded. The second pressure plate and the base are movably connected along the second direction. The second direction forms an angle with the first direction. The second pressure plate and the first pressure plate are used to clamp or release the workpiece to be welded.
2. The welding fixture according to claim 1, characterized in that, The base includes two first sidewalls arranged opposite each other along the first direction, one of which has a first groove. The first groove passes through the first sidewall along the first direction. The first pressure plate is inserted into the first groove and slides relative to the base along the first groove in the first direction.
3. The welding fixture according to claim 2, characterized in that, The mounting groove includes two second sidewalls arranged opposite each other along a third direction. The second sidewalls are connected between the two first sidewalls. A second sliding groove is provided on the side of the second sidewall facing the mounting groove. The second sliding groove extends along the first direction. The first pressure plate slides relative to the base along the second sliding groove in the first direction. The third direction, the first direction and the second direction form an angle with each other.
4. The welding fixture according to claim 1, characterized in that, The base includes two first sidewalls arranged opposite each other along the first direction. A third sliding groove is formed on the first sidewall. The third sliding groove passes through the first sidewall along the first direction and extends along the second direction. The second pressure plate slides relative to the base along the third sliding groove in the second direction.
5. The welding fixture according to claim 4, characterized in that, Two third sliding grooves are formed on the first sidewall, and the two third sliding grooves are distributed along a third direction; the third direction, the first direction and the second direction form an angle with each other.
6. The welding fixture according to claim 4, characterized in that, The welding fixture includes a first limiting member, which is movably connected to the second pressure plate. The first limiting member is used to limit the position of the second pressure plate relative to the base.
7. The welding fixture according to claim 6, characterized in that, The first limiting member includes an adjustment position and a locking position; when the first limiting member is in the adjustment position, the second pressure plate can slide relative to the base in the second direction along the third sliding groove; when the first limiting member is in the locking position, the first limiting member is used to limit the position of the second pressure plate relative to the base.
8. The welding fixture according to claim 1, characterized in that, The second pressure plate includes a first sub-plate and a second sub-plate stacked along the second direction. The first sub-plate is provided with a cooling channel and is used to support the workpiece to be welded. The second sub-plate is movably connected to the base.
9. The welding fixture according to claim 1, characterized in that, The welding fixture further includes a second limiting member, which is connected to the second pressure plate. The second limiting member is at least partially located on the side of the second pressure plate facing the first pressure plate, and is used to limit the position of the workpiece to be welded on the second pressure plate.
10. The welding fixture according to claim 9, characterized in that, The welding fixture includes a plurality of second limiting members, which are arranged circumferentially along the second pressure plate.