Welding tool

Abstract

The utility model relates to the technical field of welding assistance, and discloses a welding tool which is used for fixing a workpiece to be welded, the workpiece comprises a shell and a top cover embedded in the shell, and the welding tool comprises a working table provided with a workpiece placing area; the pressing mechanism comprises at least one group of pressing assemblies adjacent to the workpiece placing area, and each pressing assembly comprises a first pressing structure and a second pressing structure; when the workpiece is located in the workpiece containing area, the first pressing structure movably abuts against the shell, the second pressing structure movably abuts against the top cover, the second pressing structure can drive the top cover to move towards the shell, and the side edge of the top cover is attached to the side edge of the shell. The welding fixture has the advantages that workpieces can be fixed in multiple directions, deformation of the workpieces in the welding process can be avoided, and meanwhile the phenomenon that welding seams of the workpieces are too large can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of welding auxiliary technology, and in particular to a welding fixture. Background Technology

[0002] In modern manufacturing, welding, as a key process for joining metal components, is crucial to the performance of the final product due to its quality and efficiency. For workpieces with complex structures, such as assemblies containing a shell and a top cover embedded within it, ensuring precise alignment and tight contact between these components during welding is particularly important. However, traditional welding fixtures often employ single-directional or positional fixing methods, which are insufficient for handling complex workpieces requiring multi-directional and multi-layered fixing. For example, fixing the shell only from the outside cannot ensure a precise fit between the inner top cover and the shell, easily leading to gaps or deformation in the welded assembly. Furthermore, because sufficient contact between the top cover and the shell cannot be guaranteed, large weld seams may be generated during welding, potentially even leading to welding defects, affecting the quality and performance of the final product. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a welding fixture that can fix the workpiece in multiple directions, prevent the workpiece from deforming during the welding process, and reduce the phenomenon of excessive weld seam.

[0004] The technical solution adopted by this utility model to solve its technical problem is a welding fixture for fixing a workpiece to be welded, the workpiece including a shell and a top cover embedded in the shell, the welding fixture including:

[0005] A workbench is provided with a workpiece placement area.

[0006] A clamping mechanism includes at least one set of clamping components adjacent to the workpiece placement area. The clamping components include a first clamping structure and a second clamping structure. When the workpiece is in the workpiece placement area, the first clamping structure is movably abutting against the outer shell, and the second clamping structure is movably abutting against the top cover. The second clamping structure can drive the top cover to move towards the outer shell and make the side of the top cover fit against the side of the outer shell.

[0007] In one of the above-mentioned welding fixtures, a workpiece placement rack is provided in the workpiece placement area, the workpiece is detachably placed on the workpiece placement rack, and the workpiece placement rack can restrict the movement of the workpiece along the X-axis and Y-axis directions.

[0008] In one of the welding fixtures described above, the clamping assembly further includes a driving structure disposed on the worktable and adjacent to the workpiece placement rack. The driving structure is connected to the first clamping structure and the second clamping structure respectively, and can drive the first clamping structure and the second clamping structure to move relative to the workpiece in the horizontal and vertical directions.

[0009] In the above-mentioned welding fixture, the driving structure includes a first driving member and a second driving member. The first driving member is connected to the first pressing structure and can drive the first pressing structure to move in the horizontal direction. The second driving member is connected to the second pressing structure and can drive the second pressing structure to move in the horizontal direction.

[0010] In the above-mentioned welding fixture, the driving structure further includes a third driving member, which is connected to the first driving member and the second driving member and can drive the first driving member and the second driving member to move in the vertical direction. When the first driving member or the second driving member moves, the first clamping structure or the second clamping structure moves synchronously.

[0011] In the aforementioned welding fixture, the driving structure further includes a fixing frame, which includes a first fixing plate, a second fixing plate, and a third fixing plate. The first driving member is disposed on the first fixing plate, the second driving member is disposed on the second fixing plate, and the output end of the third driving member is connected to the third fixing plate. The first fixing plate, the second fixing plate, and the third fixing plate are connected by a connecting rod.

[0012] In one of the above-mentioned welding fixtures, the second clamping structure is provided with at least one clearance groove, which penetrates the second clamping structure and is recessed towards the ground; when the second clamping structure abuts against the top cover, the welding equipment can weld the top cover and the outer shell through the clearance groove.

[0013] In one of the welding fixtures described above, the clamping components are provided in four sets, arranged circumferentially along the workpiece placement frame, and corresponding one-to-one with the four faces of the workpiece.

[0014] In the above-mentioned welding fixture, a rotary table is rotatably provided on the workbench, the workpiece placement rack and the clamping assembly are disposed on the rotary table, and the rotary table can drive the clamping assembly and the workpiece placement rack to rotate circumferentially.

[0015] In one of the welding fixtures described above, a lifting structure is provided below the rotary table. The lifting structure includes a lifting rod. The rotary table has a through hole through which the lifting rod passes. The lifting rod can movably pass through the rotary table and connect to the workpiece placement rack, and can drive the workpiece placement rack to move up and down in the vertical direction.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. In this utility model, by providing at least one set of clamping components adjacent to the workpiece placement area, the clamping components include a first clamping structure and a second clamping structure. The first clamping structure is movably abutted against the outer shell, and the second clamping structure is movably abutted against the top cover, and can drive the top cover to move towards the outer shell, thereby ensuring that the side of the top cover can fit tightly against the side of the outer shell. This not only reduces the displacement and deformation of the workpiece during welding, but also avoids the phenomenon of excessively large weld seams between the top cover and the outer shell, effectively reducing the risk of welding defects and improving welding quality.

[0018] 2. In this utility model, by setting an avoidance groove on the second pressing structure, interference between the second pressing structure and the welding equipment is avoided, so that the welding equipment can approach the welding point without obstruction, improving the convenience of welding operation and reducing the possibility of welding defects.

[0019] 3. In this utility model, by setting a rotatable rotary table on the workbench, the workpiece can be adjusted in angle and height as needed to adapt to different welding requirements, which further improves the flexibility of welding. At the same time, by setting a lifting structure connected to the workpiece placement rack under the rotary table, the convenience of workpiece assembly and disassembly is improved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a welding fixture according to the present invention.

[0021] Figure 2 This is a cross-sectional view of a welding fixture according to the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of a welding fixture that conceals the cabinet door according to this utility model.

[0023] Figure 4 This is a schematic diagram of the clamping component in this utility model.

[0024] Figure 5 This is a structural schematic diagram of the clamping component in this utility model from another perspective.

[0025] Figure 6 This is a diagram showing the product placed on the workpiece placement rack in this utility model.

[0026] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0027] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100, worktable; 110, receiving cavity; 120, cabinet door; 200, first clamping structure; 210, clamping block; 220, first connecting block; 300, second clamping structure; 310, clearance groove; 320, through groove; 330, second connecting block; 400, driving structure; 410, first driving member; 420, second driving member; 430, third driving member; 44 0. Fixing frame; 441. First fixing plate; 442. Second fixing plate; 443. Third fixing plate; 444. Connecting rod; 500. Workpiece placement rack; 600. Rotary table; 610. Turntable; 611. Through hole; 620. Rotary drive; 630. Support frame; 700. Lifting structure; 710. Lifting rod; 720. Fourth driving component; 800. Support plate; 810. Guide rod; 900. Workpiece; 910. Outer shell; 920. Top cover. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] like Figures 1 to 7 As shown, in this embodiment, a welding fixture is used to fix a workpiece 900 to be welded. The workpiece 900 includes a housing 910 and a top cover 920 embedded in the housing 910. The welding fixture includes:

[0034] Workbench 100, on which a workpiece 900 placement area is provided;

[0035] The clamping mechanism includes at least one set of clamping components adjacent to the workpiece 900 placement area. Each clamping component includes a first clamping structure 200 and a second clamping structure 300. When the workpiece 900 is within the workpiece 900 placement area, the first clamping structure 200 movably abuts against the outer shell 910, and the second clamping structure 300 movably abuts against the top cover 920. The second clamping structure 300 can also move the top cover 920 towards the outer shell 910, causing the side of the top cover 920 to fit against the side of the outer shell 910. This not only reduces the displacement and deformation of the workpiece 900 during welding but also avoids excessively large weld seams between the top cover 920 and the outer shell 910, effectively reducing the risk of welding defects and improving welding quality.

[0036] Specifically, such as Figures 1 to 7 As shown, in this embodiment, the workbench 100 is rectangular cabinet-shaped and serves as a load-bearing component. It has a accommodating cavity 110 for accommodating the rotary table 600 and electrical equipment, etc. The workbench 100 is provided with an openable cabinet door 120 below it. Operators can conveniently maintain and disassemble the rotary table 600 and electrical equipment by opening the cabinet door 120.

[0037] In this embodiment, the upper surface of the worktable 100 is provided with a workpiece 900 placement area for initial positioning of the workpiece 900. To prevent the workpiece 900 from moving after placement, a workpiece placement rack 500 is provided within the workpiece 900 placement area. This workpiece placement rack 500 is composed of multiple U-shaped supports spliced ​​together to form a rectangular groove. The workpiece 900 is detachably placed within the rectangular groove, and the workpiece placement rack 500 can restrict the movement of the workpiece 900 along the X and Y axes, achieving initial fixation of the workpiece 900, enhancing the accuracy of workpiece 900 positioning, and improving the precision during the welding process.

[0038] Since the workpiece 900 to be tested includes a shell 910 and a top cover 920 embedded in the shell 910, and traditional welding fixtures can only fix the outer wall of the shell 910, they cannot guarantee the precise fit between the inner top cover 920 and the shell 910. This not only easily leads to deformation of the workpiece 900 during welding, but also causes the weld between the shell 910 and the top cover 920 to be too large, thus affecting the welding quality of the workpiece 900. Therefore, in this embodiment, the clamping mechanism includes at least one set of clamping components adjacent to the workpiece 900 placement area, and the clamping components include a first clamping structure 200 and a second clamping structure 300. When the workpiece 900 is inside the workpiece placement rack 500, the first clamping structure 200 is movably abutted against the side wall of the outer shell 910, and the second clamping structure 300 is movably abutted against the side wall of the top cover 920. The second clamping structure 300 can drive the top cover 920 to move towards the outer shell 910, and make the side of the top cover 920 fit against the side of the outer shell 910. This design not only reduces the gap between the outer shell 910 and the top cover 920, ensuring the welding accuracy, but also effectively avoids deformation of the workpiece 900 during welding because the inner and outer sides of the workpiece 900 are abutted, thereby effectively improving the welding quality of the workpiece 900.

[0039] In this embodiment, the first clamping structure 200 includes at least one U-shaped clamping block 210. The protrusion of the clamping block 210 has a connecting groove and is detachably connected to the output end of the drive structure 400 via a first connecting block 220. This design effectively improves the ease of disassembly, assembly, and maintenance of the first clamping structure 200. The number of clamping blocks 210 is adapted to the width and length of the workpiece 900. Preferably, the first clamping structure 200 corresponding to the short side of the workpiece 900 includes two clamping blocks 210 arranged side-by-side, and the first clamping structure 200 corresponding to the long side of the workpiece 900 includes six clamping blocks 210 arranged side-by-side. This design increases the contact area between the first clamping structure 200 and the outer shell 910, making the workpiece 900 more evenly stressed and less prone to deformation.

[0040] In this embodiment, the second clamping structure 300 is rectangular and is detachably connected to the output end of the drive structure 400 via the second connecting block 330. This design effectively improves the ease of disassembly, assembly, and maintenance of the second clamping structure 300. To avoid interference with the installation of the first clamping structure 200, preferably, the second clamping structure 300 is also provided with multiple rectangular through slots 320 on the side near the first clamping structure 200. These through slots 320 are arranged in a straight line, and the width of a single through slot 320 is adapted to the width of a single clamping block 210.

[0041] In this embodiment, the second clamping structure 300 is provided with at least one clearance groove 310. This clearance groove 310 is U-shaped, penetrates the second clamping structure 300, and is recessed towards the ground. When the second clamping structure 300 abuts against the top cover 920, the welding equipment can weld the top cover 920 to the outer shell 910 through the clearance groove 310. This design effectively avoids interference between the second clamping structure 300 and the welding equipment, allowing the welding equipment to approach the welding point without obstruction, improving the convenience of the welding operation, and reducing the possibility of welding defects. Furthermore, after the welding equipment performs spot welding on the workpiece 900 through the clearance groove 310, preliminary welding of the workpiece 900 can be achieved.

[0042] It is worth noting that after the workpiece 900 completes the initial welding, the drive structure 400 drives the second clamping structure 300 to move to the outside of the top cover 920. At this time, the operator then performs full welding on the weld of the workpiece 900 to ensure the firmness of the weld.

[0043] In this embodiment, the clamping assembly also includes a drive structure 400 disposed on the worktable 100 and adjacent to the workpiece placement rack 500. The drive structure 400 is connected to the first clamping structure 200 and the second clamping structure 300 respectively, and can drive the first clamping structure 200 and the second clamping structure 300 to move horizontally and vertically relative to the workpiece 900. The design of the drive structure 400 enables precise control of the positions of the first clamping structure 200 and the second clamping structure 300, ensuring they can accurately act on different parts of the workpiece 900. Furthermore, it eliminates the need for operators to manually adjust the positions of the clamping structures, greatly simplifying the operation process. This not only improves work efficiency but also reduces the impact of human factors on welding quality. In addition, since the drive structure 400 can drive the first clamping structure 200 and the second clamping mechanism to move horizontally and vertically, it can adapt to workpieces 900 of different sizes and shapes, greatly improving the versatility and applicability of the equipment.

[0044] In this embodiment, the drive structure 400 includes a first drive member 410 and a second drive member 420. The first drive member 410 is connected to the first pressing structure 200 and can drive the first pressing structure 200 to move horizontally. The second drive member 420 is connected to the second pressing structure 300 and can drive the second pressing structure 300 to move horizontally. This design allows for independent adjustment of the horizontal positions of the first pressing structure 200 and the second pressing structure 300. After the first pressing structure 200 fixes the outer shell 910, the second pressing structure 300 can move towards the inner wall of the outer shell 910 under the drive of the second drive member 420, achieving a fit between the top cover 920 and the outer shell 910. This ensures a seamless connection between the top cover 920 and the outer shell 910, improving the quality and strength of the welded joint. Furthermore, independent driving ensures that the pressure applied by each pressing structure is more uniform and controllable, thereby improving the quality and strength of the welded joint. Furthermore, the independent design of the first drive component 410 and the second drive component 420 facilitates individual maintenance and replacement of components, further improving the reliability and maintainability of the welding fixture.

[0045] Preferably, in this embodiment, the second driving member 420 is located directly above the first driving member 410, and a support column is provided below the first driving member 410. The output end of the first driving member 410 is detachably connected to the first connecting block 220 on the first pressing structure 200 via bolts, and the output end of the second driving member 420 is detachably connected to the second connecting block 330 on the second pressing structure 300 via bolts. This design ensures ease of assembly, disassembly, and maintenance of the first driving member 410, the second driving member 420, the first pressing structure 200, and the second pressing structure 300.

[0046] In this embodiment, the driving structure 400 further includes a third driving member 430, which is connected to the first driving member 410 and the second driving member 420 and can drive the first driving member 410 and the second driving member 420 to move vertically. A support column is provided below the third driving member 430. When the first driving member 410 or the second driving member 420 moves, the first pressing structure 200 or the second pressing structure 300 moves synchronously. This design enables precise adjustment of the vertical position of the first pressing structure 200 and the second pressing structure 300 to adapt to the welding height requirements of different workpieces 900, thereby improving the welding quality.

[0047] Preferably, in this embodiment, the third driving member 430 is located below the first driving member 410, and is sequentially connected to the first driving member 410 and the second driving member 420, driving the first driving member 410 and the second driving member 420 to move synchronously. This design makes the entire drive structure 400 more compact, facilitating installation and maintenance. Furthermore, the compact design reduces the cost and complexity of the equipment. Since the third driving member 430 can simultaneously control the vertical position adjustment of the first driving member 410 and the second driving member 420, the operator only needs to perform one vertical position adjustment to complete the vertical position adjustment of multiple clamping structures, effectively simplifying the operation steps and improving work efficiency.

[0048] In this embodiment, the first driving member 410, the second driving member 420 and the third driving member 430 are all driving cylinders, hydraulic cylinders or linear motors, preferably driving cylinders.

[0049] In this embodiment, the drive structure 400 further includes a fixing frame 440, which includes a first fixing plate 441, a second fixing plate 442, and a third fixing plate 443 arranged vertically. The first fixing plate 441 is rectangular and located between the second fixing plate 442 and the third fixing plate 443. A first driving member 410 is disposed on the first fixing plate 441. The second fixing plate 442 is T-shaped and a second driving member 420 is disposed on the second fixing plate 442. The third fixing plate 443 is rectangular, and the output end of the third driving member 430 is connected to the third fixing plate 443. The first fixing plate 441, the second fixing plate 442, and the third fixing plate 443 are connected by a connecting rod 444. This design allows the third driving member 430 to drive the first driving member 410 and the second driving member 420 to move vertically synchronously through the fixing frame 440. Furthermore, the multi-layer fixing plate design not only ensures the overall strength and stability of the drive structure 400, but also guarantees the collaborative work and independent control capabilities between each drive component, enabling precise adjustment of the first clamping structure 200 and the second clamping structure 300, thereby improving operational accuracy and efficiency.

[0050] In this embodiment, four sets of clamping components are arranged along the axial direction of the workpiece placement frame 500 and correspond one-to-one with the four faces of the workpiece 900. This design achieves omnidirectional fixation of the workpiece 900, ensuring uniform force distribution around the workpiece 900 and improving the reliability and quality of welding.

[0051] In this embodiment, a rotary table 600 is rotatably mounted on the worktable 100. The workpiece placement rack 500 and multiple sets of clamping components are all mounted on the rotary table 600, and the rotary table 600 can drive the clamping components and the workpiece placement rack 500 to rotate circumferentially. By setting a rotatable rotary table 600, the workpiece placement rack 500 and the clamping components can rotate circumferentially together with the rotary table 600, thereby allowing the operator to easily adjust the angle of the workpiece 900 by controlling the rotary table 600, greatly simplifying the operation process and improving the convenience of operation.

[0052] Preferably, the worktable 100 is further provided with a support plate 800, and the clamping components are detachably mounted on the support plate 800. The workpiece placement rack 500 is movably mounted on the support plate 800, and a vertically arranged guide rod 810 is provided between the workpiece placement rack 500 and the support plate 800. This design ensures the consistency of rotation of the workpiece placement rack 500 and the clamping components, and also improves the stability of the workpiece placement rack 500's vertical movement.

[0053] In this embodiment, a lifting structure 700 is also provided below the rotary table 600. The lifting structure 700 includes a lifting rod 710. The rotary table 600 has a through hole 611 through which the lifting rod 710 passes. The lifting rod 710 movably passes through the rotary table 600 and is rotatably connected to the workpiece placement rack 500, driving the workpiece placement rack 500 to move vertically up and down. The design of the lifting structure 700 allows operators to quickly adjust the height of the workpiece 900 according to specific needs, enhancing the operational flexibility and adaptability of the equipment. Furthermore, when assembling or disassembling the workpiece 900, the lifting structure 700 can lift the workpiece placement rack 500, allowing operators to easily assemble or disassemble the workpiece 900.

[0054] In this embodiment, the rotary table 600 includes a turntable 610 and a rotary driver 620. The rotary driver 620 is detachably disposed in the accommodating cavity 110 below the worktable 100 via a support frame 630. One side of the turntable 610 is connected to the output end of the rotary driver 620, and the other side is detachably connected to the support plate 800. When the rotary driver 620 is started, the turntable 610 can drive the workpiece placement rack 500 and the clamping assembly to rotate via the support plate 800.

[0055] Preferably, in this embodiment, the rotary drive 620 is a slip ring having a channel through which the lifting rod 710 passes.

[0056] In this embodiment, the lifting structure 700 includes a fourth driving member 720 connected to the lifting rod 710 and located below the rotary driver 620. The fourth driving member 720 is detachably connected to the support frame 630, and its conveying end is detachably connected to the lifting rod 710, enabling it to drive the lifting rod 710 to move up and down. The fourth driving member 720 is a driving cylinder or a hydraulic cylinder, preferably a driving cylinder.

Claims

1. A welding fixture for fixing a workpiece to be welded, the workpiece comprising a housing and a top cover embedded within the housing, characterized in that, The welding fixture includes: A workbench is provided with a workpiece placement area. A clamping mechanism includes at least one set of clamping components adjacent to the workpiece placement area. The clamping components include a first clamping structure and a second clamping structure. When the workpiece is in the workpiece placement area, the first clamping structure is movably abutting against the outer shell, and the second clamping structure is movably abutting against the top cover. The second clamping structure can drive the top cover to move towards the outer shell and make the side of the top cover fit against the side of the outer shell.

2. The welding fixture according to claim 1, characterized in that, The workpiece placement area is provided with a workpiece placement rack, on which the workpiece is detachably placed, and the workpiece placement rack can restrict the movement of the workpiece along the X-axis and Y-axis directions.

3. The welding fixture according to claim 2, characterized in that, The clamping assembly also includes a drive structure disposed on the worktable and adjacent to the workpiece placement rack. The drive structure is connected to the first clamping structure and the second clamping structure respectively, and can drive the first clamping structure and the second clamping structure to move relative to the workpiece in the horizontal and vertical directions.

4. The welding fixture according to claim 3, characterized in that, The driving structure includes a first driving member and a second driving member. The first driving member is connected to the first pressing structure and can drive the first pressing structure to move in the horizontal direction. The second driving member is connected to the second pressing structure and can drive the second pressing structure to move in the horizontal direction.

5. The welding fixture according to claim 4, characterized in that, The driving structure further includes a third driving component, which is connected to the first driving component and the second driving component and can drive the first driving component and the second driving component to move in the vertical direction. When the first driving component or the second driving component moves, the first pressing structure or the second pressing structure moves synchronously.

6. The welding fixture according to claim 5, characterized in that, The drive structure further includes a fixing frame, which includes a first fixing plate, a second fixing plate, and a third fixing plate. The first drive component is disposed on the first fixing plate, the second drive component is disposed on the second fixing plate, and the output end of the third drive component is connected to the third fixing plate. The first fixing plate, the second fixing plate, and the third fixing plate are connected by a connecting rod.

7. The welding fixture according to claim 1, characterized in that, The second pressing structure is provided with at least one clearance groove, which penetrates the second pressing structure and is recessed towards the ground; when the second pressing structure abuts against the top cover, the welding equipment can weld the top cover and the outer shell through the clearance groove.

8. A welding fixture according to claim 2, characterized in that, The clamping assembly consists of four sets, arranged circumferentially along the workpiece placement frame, and corresponding one-to-one with the four faces of the workpiece.

9. A welding fixture according to claim 2, characterized in that, The workbench is rotatably provided with a rotary table, the workpiece placement rack and the clamping assembly are disposed on the rotary table, and the rotary table can drive the clamping assembly and the workpiece placement rack to rotate circumferentially.

10. A welding fixture according to claim 9, characterized in that, Below the rotary table is a lifting structure, which includes a lifting rod. The rotary table has a through hole for the lifting rod to pass through, and the lifting rod can move through the rotary table and connect to the workpiece placement rack, and can drive the workpiece placement rack to move up and down in the vertical direction.

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