Fixing clamp for metal plate welding

By designing an automatically adjustable clamping and support structure, the problem that existing fixtures cannot adapt to sheet metal of different sizes has been solved, thereby improving the stability and efficiency of sheet metal welding, reducing manual intervention, and increasing the automation level of the machine.

CN121776776APending Publication Date: 2026-04-03QINGDAO CENTURY RUNHENG MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-04
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

Existing fixtures for sheet metal welding cannot automatically adjust the clamping components to accommodate sheet metal of different sizes, resulting in time-consuming and labor-intensive manual adjustments, which reduces the ease of operation and work efficiency of the machine.

Method used

A fixture comprising a clamping device, a support device, and a transmission device was designed. The fixture utilizes a motor-driven threaded rod and a slider system to automatically adjust the position of the clamping plate and the support structure. Combined with the clamping method of the rubber plate and the inclined plate, it ensures the stability of the sheet metal position and avoids deformation. The transmission device enables automatic loading and unloading.

Benefits of technology

It improves the stability and efficiency of sheet metal welding, avoids sheet metal misalignment and deformation, reduces manual intervention, and enhances the automation level and work efficiency of the machine.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of fixing for sheet metal welding, and discloses a fixing clamp for sheet metal welding, which comprises a base, the top of the base is fixedly connected with a workbench, the top of the base is provided with a conveying belt, the top of the base is provided with a conveying belt, the surface of the base is provided with a notch, and the inner wall of the notch is slidably connected with a bracket; the bottom of the base is fixedly connected with a supporting frame, and a clamping device is arranged above the base. When a motor is started, an output end drives a moving plate to move through a threaded rod, the moving plate drives a sliding block to move back and forth in a sliding rail, the sliding block drives a moving supporting plate to move through a one-way electric push rod, and when the moving supporting plate moves, a thin rod drives a clamping plate to move mutually; and meanwhile, when the clamping plates get close to each other, extrusion plates get close to each other by extruding inclined plates, so that the extrusion plates further fix and clamp the metal plates.
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Description

Technical Field

[0001] This invention relates to the field of fixing equipment for sheet metal welding, specifically a fixing clamp for sheet metal welding. Background Technology

[0002] Sheet metal is characterized by its light weight, high strength, electrical conductivity (which can be used for electromagnetic shielding), low cost, and good mass production performance. It has been widely used in electronics, communications, automotive, and medical devices. For example, sheet metal is an indispensable component in computer cases, mobile phones, and MP3 players. With the increasingly widespread application of sheet metal, its design has become a crucial part of the product development process.

[0003] An existing fixture for sheet metal welding typically requires manual adjustment of the clamping components when clamping and fixing sheet metal of different sizes. The machine cannot automatically adjust the clamping components according to the size of the sheet metal. Using manual labor wastes a lot of manpower and time, reduces the ease of operation of the machine, and thus reduces the machine's working efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a fixing fixture for sheet metal welding to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a fixing fixture for sheet metal welding, comprising a base, a workbench fixedly connected to the top of the base, a conveyor belt provided on the top of the base, a slot formed on the surface of the base, a bracket slidably connected to the inner wall of the slot, a support frame fixedly connected to the bottom of the base, a clamping device provided above the base, a supporting device provided above the base, and a conveying device provided above the base.

[0007] The clamping device includes a motor, the surface of which is fixedly connected to the inner wall of the bracket. A threaded rod is fixedly connected to the output end of the motor. A movable plate is threadedly connected to the surface of the threaded rod. A slider is fixedly connected to the end of the movable plate away from the threaded rod. A slide rail is slidably connected to the surface of the slider. A telescopic rod is fixedly connected to the inner wall of the slide rail. A one-way electric actuator is fixedly connected to the top of the slider. A movable support plate is fixedly connected to the output end of the one-way electric actuator.

[0008] Furthermore, a spring plate is fixedly connected to the surface of the movable support plate, a thin rod is slidably connected to the inner wall of the movable support plate, a clamping plate is fixedly connected to the end of the thin rod away from the movable support plate, a rubber plate is fixedly connected to the surface of the clamping plate away from the thin rod, a support rod is fixedly connected to the upper surface of the clamping plate, an inclined plate is hinged to the end of the support rod away from the clamping plate, a pressing plate is hinged to the end of the inclined plate away from the support rod, and a rubber pad is fixedly connected to the surface of the pressing plate.

[0009] Furthermore, the threaded rod passes through the movable plate and extends to the outer end of the movable plate, the slide rail is located above the base, and the end of the telescopic rod away from the slide rail is fixedly connected to the surface of the slider.

[0010] Furthermore, the thin rod passes through the movable support plate and extends to the surface of the spring plate, with the end of the thin rod away from the clamping plate fixedly connected to the surface of the spring plate, which is located above the slider.

[0011] Furthermore, the support device includes a push rod, the end of which is fixedly connected to the surface of the slider, an elastic bent rod fixedly connected to the end of the push rod away from the slider, a pulley fixedly connected to the end of the elastic bent rod away from the push rod, a shock-absorbing block fixedly connected to the top of the worktable, a shrinking platform fixedly connected to the end of the shock-absorbing block away from the worktable, a tension support plate slidably connected to the inner wall of the shrinking platform, a limit rod slidably connected to the inner wall of the worktable, a flexible rod fixedly connected to the surface of the limit rod, and a groove formed on the inner wall of the tension support plate.

[0012] Furthermore, the surface of the pulley away from the elastic curved rod is slidably connected to the inner wall of the slide groove, the limiting rod passes through the workbench and extends to the bottom of the shrinkage table, the end of the limiting rod is fixedly connected to the bottom of the shrinkage table, and the end of the flexible rod away from the limiting rod is fixedly connected to the bottom of the workbench.

[0013] Furthermore, the transmission device includes a second motor, the surface of which is fixedly connected to the inner wall of the support frame, a second threaded rod fixedly connected to the output end of the second motor, a movable frame threadedly connected to the surface of the second threaded rod, a movable groove opened in the inner wall of the base, a tension rod fixedly connected to the inner wall of the movable groove, a movable pulley slidably connected to the inner wall of the movable groove, and a support frame fixedly connected to the top of the movable pulley.

[0014] Furthermore, the end of the movable frame away from the second threaded rod is fixedly connected to the bottom of the movable pulley, the end of the tension rod away from the movable groove is fixedly connected to the surface of the movable pulley, and the inner wall of the support frame is fixedly connected to the surface of the slide rail.

[0015] The present invention has the following beneficial effects:

[0016] When the motor of this invention is turned on, the output end drives the moving plate to move via the threaded rod. The moving plate drives the slider to move back and forth inside the slide rail, causing the slider to drive the moving support plate to move via the one-way electric push rod. When the moving support plate moves, it drives the clamping plates to move relative to each other via the thin rod, allowing the clamping plates and rubber plates to clamp sheet metal of different sizes. At the same time, when the clamping plates are close to each other, the squeezing inclined plate will bring the squeezing plates closer together, further fixing and clamping the sheet metal. This improves the stability of the sheet metal position during welding, preventing displacement and damage. When the one-way electric push rod is turned on, the output end drives the clamping plate to move upward via the moving support plate. When the clamping plate moves upward, it drives the squeezing plate upward along with it via the inclined plate, allowing the clamping plate and squeezing plate to fall quickly from above the sheet metal for rapid clamping and separation, improving the machine's working efficiency. When the clamping plates are clamping the sheet metal, the thin rod will squeeze the spring plate to relieve force and prevent excessive squeezing that could cause sheet metal deformation.

[0017] When the slider of this invention moves, it drives the elastic bending rod through the push rod and pulls the tension support plate to move back and forth inside the shrinking table. This allows the machine to support sheet metal of different sizes, avoiding bending and deformation problems when welding large sheet metal, thus improving the quality of sheet metal welding. At the same time, when the sheet metal is welded above the shrinking table, the shock-absorbing block and the limiting rod will have a shock-absorbing effect on the shrinking table, preventing sheet metal deformation caused by compression. The flexible rod will limit and reset the limiting rod.

[0018] When the second motor of this invention is turned on, the output end drives the movable frame to move back and forth via the second threaded rod. When the movable frame moves, it drives the movable pulley to move inside the movable groove. The tension rod ensures that the movable pulley is in a stable position during movement, avoiding any deviation. When the movable pulley moves, it drives the slide rail to move together via the support frame, thereby moving the clamping component above the conveyor belt. This allows for the clamping and loading of the sheet metal above the conveyor belt. When the welding work is completed, the support frame drives the clamping component to move via the slide rail, allowing the clamping component to move the welded sheet metal above the conveyor belt. This completes the sheet metal transfer and collection work, eliminating the need for manual loading and unloading and improving the machine's efficiency.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the clamping device structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A in the middle;

[0025] Figure 5 This is another structural schematic diagram of the clamping device of the present invention;

[0026] Figure 6 For the present invention Figure 5 Enlarged structural diagram of section B in the middle;

[0027] Figure 7 This is a schematic diagram of the support device structure of the present invention;

[0028] Figure 8 For the present invention Figure 7 Enlarged structural diagram of section C;

[0029] Figure 9 This is another structural schematic diagram of the support device of the present invention;

[0030] Figure 10 This is a schematic diagram of the transmission device structure of the present invention;

[0031] Figure 11 For the present invention Figure 10 Enlarged structural diagram of section D in the middle;

[0032] Figure 12 This is a schematic diagram of the second threaded rod structure of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] In the diagram: 1. Base; 2. Workbench; 3. Conveyor belt; 4. Conveyor belt; 5. Groove; 6. Bracket; 7. Support frame; 8. Clamping device; 9. Support device; 10. Transmission device; 20. Motor; 21. Threaded rod; 22. Moving plate; 23. Slider; 24. Slide rail; 25. Telescopic rod; 26. One-way electric actuator; 27. Moving support plate; 28. Spring plate; 29. ​​Thin rod; 30. Clamping plate; 31. Rubber rod. 32. Rubber sheet; 33. Extrusion plate; 34. Rubber pad; 35. Support rod; 46. Inclined plate; 47. Push rod; 48. Elastic bending rod; 49. Pulley; 40. Tension support plate; 41. Slide groove; 42. Shock absorber block; 43. Limiting rod; 44. Flexible rod; 55. Shrinkage table; 66. Moving groove; 77. Moving frame; 88. Tension rod; 99. Moving pulley; 100. Support frame; 11. Second motor; 12. Second threaded rod. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1 - Figure 12 As shown, the present invention is a fixing fixture for sheet metal welding, including a base 1, a workbench 2 fixedly connected to the top of the base 1, a conveyor belt 3 and a conveyor belt 4 provided on the top of the base 1, a slot 5 opened on the surface of the base 1, a bracket 6 slidably connected to the inner wall of the slot 5, a support frame 7 fixedly connected to the bottom of the base 1, a clamping device 8 and a supporting device 9 provided on the top of the base 1, and a transmission device 10 provided on the top of the base 1.

[0037] The clamping device 8 includes a motor 20. When the motor 20 is turned on, its output end drives the moving plate 22 to move via a threaded rod 21. The surface of the motor 20 is fixedly connected to the inner wall of the bracket 6. The output end of the motor 20 is fixedly connected to the threaded rod 21, and the moving plate 22 is threadedly connected to the surface of the threaded rod 21. The moving plate 22 drives the slider 23 to move back and forth inside the slide rail 24, causing the slider 23 to drive the moving support plate 27 to move via a one-way electric push rod 26. The end of the moving plate 22 away from the threaded rod 21 is fixedly connected to the slider 27. 3. A slide rail 24 is slidably connected to the surface of the slider 23. A telescopic rod 25 is fixedly connected to the inner wall of the slide rail 24. A one-way electric actuator 26 is fixedly connected to the top of the slider 23. When the one-way electric actuator 26 is opened, the output end will drive the clamping plate 30 to move upward through the movable support plate 27. The output end of the one-way electric actuator 26 is fixedly connected to the movable support plate 27. When the movable support plate 27 moves, it will drive the clamping plate 30 to move relative to each other through the thin rod 29, so that the clamping plate 30 can drive the rubber plate 31 to clamp sheet metal of different sizes.

[0038] A spring plate 28 is fixedly connected to the surface of the movable support plate 27. A thin rod 29 is slidably connected to the inner wall of the movable support plate 27. The thin rod 29 presses against the spring plate 28 to relieve force. A clamping plate 30 is fixedly connected to the end of the thin rod 29 away from the movable support plate 27. When the clamping plates 30 approach each other, they will press against the inclined plate 35 to bring the pressing plates 32 closer together, so that the pressing plates 32 can further fix and clamp the sheet metal. A rubber plate 31 is fixedly connected to the surface of the clamping plate 30 away from the thin rod 29. A support rod 34 is fixedly connected to the upper surface of the clamping plate 30. An inclined plate 35 is hinged to the end of the support rod 34 away from the clamping plate 30. The inclined plate 35 drives the pressing plates 32 to move upward together, so that the clamping plate 30 and the pressing plates 32 can fall quickly from above the sheet metal. The pressing plate 32 is hinged to the end of the inclined plate 35 away from the support rod 34. A rubber pad 33 is fixedly connected to the surface of the pressing plate 32.

[0039] The threaded rod 21 passes through the movable plate 22 and extends to the outer end of the movable plate 22. The slide rail 24 is located above the base 1. The end of the telescopic rod 25 away from the slide rail 24 is fixedly connected to the surface of the slider 23.

[0040] The thin rod 29 passes through the movable support plate 27 and extends to the surface of the spring plate 28. The end of the thin rod 29 away from the clamping plate 30 is fixedly connected to the surface of the spring plate 28, which is located above the slider 23.

[0041] The support device 9 includes a push rod 40, which drives an elastic bent rod 41 to pull a tension support plate 43 through a pulley 42 to move back and forth inside the shrinking table 48. The end of the push rod 40 is fixedly connected to the surface of the slider 23. The end of the push rod 40 away from the slider 23 is fixedly connected to the elastic bent rod 41. The end of the elastic bent rod 41 away from the push rod 40 is fixedly connected to the pulley 42. A shock-absorbing block 45 is fixedly connected to the top of the worktable 2. The shock-absorbing block 45 and the limiting rod 46 will have a shock-absorbing effect on the shrinking table 48. The end of the shock-absorbing block 45 away from the worktable 2 is fixedly connected to the shrinking table 48. The tension support plate 43 is slidably connected to the inner wall of the shrinking table 48. The limiting rod 46 is slidably connected to the inner wall of the worktable 2. A flexible rod 47 is fixedly connected to the surface of the limiting rod 46. The flexible rod 47 will limit and reset the limiting rod 46. A groove 44 is opened on the inner wall of the tension support plate 43.

[0042] The surface of pulley 42 away from elastic curved rod 41 is slidably connected to the inner wall of slide groove 44. Limiting rod 46 passes through worktable 2 and extends to the bottom of retractable table 48. The end of limiting rod 46 is fixedly connected to the bottom of retractable table 48. The end of flexible rod 47 away from limiting rod 46 is fixedly connected to the bottom of worktable 2.

[0043] The transmission device 10 includes a second motor 55. When the second motor 55 is turned on, its output end drives the movable frame 51 to move back and forth via the second threaded rod 56. The surface of the second motor 55 is fixedly connected to the inner wall of the support frame 7. The output end of the second motor 55 is fixedly connected to the second threaded rod 56, and the surface of the second threaded rod 56 is threadedly connected to the movable frame 51. When the movable frame 51 moves, it drives the movable pulley 53 to move inside the movable groove 50. The inner wall of the base 1 is provided with a movable groove 50, and the inner wall of the movable groove 50 is fixedly connected to the second threaded rod 56. A tension rod 52 is fixedly connected to the movable pulley 53, which stabilizes the position of the movable pulley 53 when it moves. The movable pulley 53 is slidably connected to the inner wall of the movable groove 50. When the movable pulley 53 moves, it drives the slide rail 24 to move together through the support frame 54, thereby causing the slide rail 24 to move the clamping component above the conveyor belt 3. The top of the movable pulley 53 is fixedly connected to the support frame 54, which drives the clamping component to move through the slide rail 24, thereby causing the clamping component to move the welded sheet metal above the conveyor belt 4.

[0044] The end of the movable frame 51 away from the second threaded rod 56 is fixedly connected to the bottom of the movable pulley 53, the end of the tension rod 52 away from the movable groove 50 is fixedly connected to the surface of the movable pulley 53, and the inner wall of the support frame 54 is fixedly connected to the surface of the slide rail 24.

[0045] When in use, when the motor 20 is turned on, the output end drives the moving plate 22 to move via the threaded rod 21. The moving plate 22 drives the slider 23 to move back and forth inside the slide rail 24, causing the slider 23 to drive the moving support plate 27 to move via the one-way electric push rod 26. When the moving support plate 27 moves, it drives the clamping plates 30 to move relative to each other via the thin rod 29, allowing the clamping plates 30 to drive the rubber plate 31 to clamp sheet metal of different sizes. At the same time, when the clamping plates 30 are close to each other, the squeezing plate 35 will cause the squeezing plate 32 to move closer to each other, further fixing and clamping the sheet metal. This improves the machine's performance when welding sheet metal. The position is more stable, avoiding damage caused by displacement. When the one-way electric actuator 26 is opened, the output end will drive the clamping plate 30 to move upward through the moving support plate 27. When the clamping plate 30 moves upward, it will drive the extrusion plate 32 to move upward together through the inclined plate 35, so that the clamping plate 30 and the extrusion plate 32 can quickly fall from above the sheet metal for quick clamping and separation, improving the machine's working efficiency. When the clamping plate 30 clamps the sheet metal, it will squeeze the spring plate 28 through the thin rod 29 to relieve the force and avoid problems such as excessive extrusion causing sheet metal deformation. When the slider 23 moves, it will drive the elastic bending rod 41 through the push rod 40. The pulley 42 pulls the tension support plate 43 to move back and forth inside the shrinking table 48, allowing the machine to support sheet metal of different sizes. This avoids bending and deformation problems during welding of large sheet metal, improving the quality of sheet metal welding. Simultaneously, when welding is performed above the shrinking table 48, the shock absorber 45 and limit rod 46 dampen the shrinking table 48, preventing sheet metal deformation due to compression. The flexible rod 47 limits and resets the limit rod 46. When the second motor 55 is turned on, its output end drives the moving frame 51 to move back and forth via the second threaded rod 56. As the moving frame 51 moves, it drives the moving slide... The wheel 53 moves inside the moving groove 50. The tension rod 52 ensures that the moving pulley 53 is in a stable position when it moves, avoiding any deviation. When the moving pulley 53 moves, it drives the slide rail 24 to move together through the support frame 54. This causes the slide rail 24 to move the clamping component above the conveyor belt 3, thereby clamping and loading the sheet metal above the conveyor belt 3. When the welding work is completed, the support frame 54 will drive the clamping component to move through the slide rail 24, causing the clamping component to move the welded sheet metal above the conveyor belt 4. This completes the sheet metal transfer and collection work, eliminating the need for manual loading and unloading and improving the machine's working efficiency.

[0046] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fixing fixture for sheet metal welding, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a workbench (2), the top of the base (1) is provided with a conveyor belt (3), the top of the base (1) is provided with a conveyor belt (4), the surface of the base (1) is provided with a slot (5), the inner wall of the slot (5) is slidably connected to a bracket (6), the bottom of the base (1) is fixedly connected to a support frame (7), the top of the base (1) is provided with a clamping device (8), the top of the base (1) is provided with a support device (9), and the top of the base (1) is provided with a transmission device (10). The clamping device (8) includes a motor (20), the surface of which is fixedly connected to the inner wall of the bracket (6), the output end of which is fixedly connected to a threaded rod (21), the surface of which is threadedly connected to a movable plate (22), the end of which is away from the threaded rod (21) is fixedly connected to a slider (23), the surface of which is slidably connected to a slide rail (24), the inner wall of which is fixedly connected to a telescopic rod (25), the top of which is fixedly connected to a one-way electric push rod (26), and the output end of which is fixedly connected to a movable support plate (27).

2. A fixing fixture for sheet metal welding according to claim 1, characterized in that: A spring plate (28) is fixedly connected to the surface of the movable support plate (27). A thin rod (29) is slidably connected to the inner wall of the movable support plate (27). A clamping plate (30) is fixedly connected to the end of the thin rod (29) away from the movable support plate (27). A rubber plate (31) is fixedly connected to the surface of the clamping plate (30) away from the thin rod (29). A support rod (34) is fixedly connected to the upper surface of the clamping plate (30). An inclined plate (35) is hinged to the end of the support rod (34) away from the clamping plate (30). A pressing plate (32) is hinged to the end of the inclined plate (35) away from the support rod (34). A rubber pad (33) is fixedly connected to the surface of the pressing plate (32).

3. A fixing fixture for sheet metal welding according to claim 2, characterized in that: The threaded rod (21) passes through the movable plate (22) and extends to the outer end of the movable plate (22). The slide rail (24) is located above the base (1). The end of the telescopic rod (25) away from the slide rail (24) is fixedly connected to the surface of the slider (23).

4. A fixing fixture for sheet metal welding according to claim 3, characterized in that: The thin rod (29) passes through the movable support plate (27) and extends to the surface of the spring plate (28). The end of the thin rod (29) away from the clamping plate (30) is fixedly connected to the surface of the spring plate (28), which is located above the slider (23).

5. A fixing fixture for sheet metal welding according to claim 4, characterized in that: The support device (9) includes a push rod (40), the end of which is fixedly connected to the surface of the slider (23). An elastic bent rod (41) is fixedly connected to the end of the push rod (40) away from the slider (23). A pulley (42) is fixedly connected to the end of the elastic bent rod (41) away from the push rod (40). A shock-absorbing block (45) is fixedly connected to the top of the worktable (2). A shrinking platform (48) is fixedly connected to the end of the shock-absorbing block (45) away from the worktable (2). A tension support plate (43) is slidably connected to the inner wall of the shrinking platform (48). A limit rod (46) is slidably connected to the inner wall of the worktable (2). A flexible rod (47) is fixedly connected to the surface of the limit rod (46). A groove (44) is provided on the inner wall of the tension support plate (43).

6. A fixing fixture for sheet metal welding according to claim 5, characterized in that: The surface of the pulley (42) away from the elastic bent rod (41) is slidably connected to the inner wall of the groove (44). The limiting rod (46) passes through the workbench (2) and extends to the bottom of the shrinkage table (48). The end of the limiting rod (46) is fixedly connected to the bottom of the shrinkage table (48). The end of the flexible rod (47) away from the limiting rod (46) is fixedly connected to the bottom of the workbench (2).

7. A fixing fixture for sheet metal welding according to claim 6, characterized in that: The transmission device (10) includes a second motor (55), the surface of the second motor (55) is fixedly connected to the inner wall of the support frame (7), the output end of the second motor (55) is fixedly connected to a second threaded rod (56), the surface of the second threaded rod (56) is threadedly connected to a movable frame (51), the inner wall of the base (1) is provided with a movable groove (50), the inner wall of the movable groove (50) is fixedly connected to a tension rod (52), the inner wall of the movable groove (50) is slidably connected to a movable pulley (53), and the top of the movable pulley (53) is fixedly connected to a support frame (54).

8. A fixing fixture for sheet metal welding according to claim 7, characterized in that: The end of the movable frame (51) away from the second threaded rod (56) is fixedly connected to the bottom of the movable pulley (53), the end of the tension rod (52) away from the movable groove (50) is fixedly connected to the surface of the movable pulley (53), and the inner wall of the support frame (54) is fixedly connected to the surface of the slide rail (24).