Fixing and welding device for automobile part production

By combining hydraulic cylinders and spring-loaded components, the welding knife can be quickly fixed and disassembled. Combined with a motor-driven gear system for stable clamping, this solves the problem of cumbersome operation of the welding knife in welding equipment and improves production efficiency and welding quality.

CN223889255UActive Publication Date: 2026-02-10LINDE ENGLEY (TIANJIN) AUTO PARTS CO LTD
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Patent Information

Application Number
CN202520514825.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-24
Publication Date
2026-02-10
Estimated Expiration
2035-03-24

AI Technical Summary

Technical Problem

In existing welding equipment used for automotive parts production, the installation and replacement of welding blades are cumbersome, resulting in long downtime and low work efficiency.

Method used

The device employs a fixing method that combines a hydraulic cylinder and a spring-loaded assembly. It achieves quick fixing and disassembly by pressing the welding knife, and uses a motor-driven gear and rack system for stable clamping, simplifying the installation and replacement process of the welding knife.

Benefits of technology

Significantly reduces welding knife replacement time, improves production efficiency, ensures clamping stability and welding quality, and reduces equipment downtime.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of automobile part production, and discloses a fixing and welding device for automobile part production, which comprises a shell, an expansion block is fixedly connected to the outer wall of the shell, a support is fixedly connected to the upper surface of the expansion block, a shell is slidably connected to the outer wall of the support, and a hydraulic cylinder is fixedly connected to the inside of the shell. An outer cover is fixedly connected to the output end of the hydraulic cylinder, a second extrusion block is fixedly connected to the interior of the outer cover, a first extrusion block is slidably connected to the outer wall of the second extrusion block, a connecting plate is fixedly connected to the side, away from the outer cover, of the first extrusion block, and a clamping block is slidably connected to the interior of the connecting plate; the side, away from the second extrusion block, of the connecting plate is slidably connected with a welding knife. According to the welding knife fixing device, the second extrusion block can extrude the first extrusion block by pressing the welding knife, the first extrusion block drives the connecting plate to move together after being extruded, the clamping block coincides with the clamping groove in the connecting block, and then fixing of the welding knife is achieved.
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Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a fixed welding device for automotive parts manufacturing. Background Technology

[0002] Welding is a crucial process in automotive parts manufacturing. Automobiles consist of numerous components, which often need to be welded together before assembly to ensure structural stability and safety. The welding blade, a key component of welding equipment, directly participates in the welding operation; its stability and ease of replacement have a decisive impact on welding quality and production efficiency. In automotive parts manufacturing workshops, various production lines operate continuously, and welding equipment frequently performs welding operations on different parts. In this high-intensity, high-frequency production environment, the stable fixation and rapid replacement of the welding blade are critical factors in ensuring smooth production.

[0003] In existing welding equipment used in automotive parts production, welding blades are secured by tightening multiple screws. This method involves placing the welding blade in a specific mounting position and then threading multiple screws through mounting holes on the blade to connect it to the equipment's fixing components. However, when the welding blade needs to be replaced, the operator must unscrew each screw individually, a cumbersome and time-consuming process. This increased downtime on the production line leads to reduced production efficiency and overall work efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a fixed welding device for automotive parts production, aiming to improve the problem that the installation method of welding knives in the prior art is cumbersome, resulting in long equipment downtime and reduced work efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixed welding device for automotive parts production, comprising a housing, an extension block fixedly connected to the outer wall of the housing, a bracket fixedly connected to the upper surface of the extension block, a shell slidably connected to the outer wall of the bracket, a hydraulic cylinder fixedly connected inside the shell, an outer cover fixedly connected to the output end of the hydraulic cylinder, a second extrusion block fixedly connected inside the outer cover, a first extrusion block slidably connected to the outer wall of the second extrusion block, a connecting plate fixedly connected to the side of the first extrusion block away from the outer cover, a locking block slidably connected inside the connecting plate, a welding blade slidably connected to the side of the connecting plate away from the second extrusion block, a spring-loaded component disposed inside the welding blade, a second slider fixedly connected to the side of the connecting plate away from the first extrusion block, a first spring fixedly connected inside the welding blade, and the end of the first spring near the connecting plate fixedly connected to the outer wall of the second slider.

[0006] Furthermore, the spring-loaded assembly includes a connecting sleeve, the outer wall of which is fixedly connected to the inside of the welding knife, and a second spring is provided inside the connecting sleeve, with both ends of the second spring fixedly connected to the end of the locking block away from the connecting plate.

[0007] Furthermore, a motor is fixedly connected inside the housing, a gear is fixedly connected to the output end of the motor, and a rack is slidably connected inside the housing, with the gear meshing with the rack.

[0008] Furthermore, a first connecting block is fixedly connected to the upper surface of the rack, a second connecting block is fixedly connected to the upper surface of the rack, a clamping block is fixedly connected to the upper surface of the first connecting block, and the lower surface of the clamping block is fixedly connected to the upper surface of the second connecting block.

[0009] Furthermore, a guide plate is fixedly connected to the upper surface of the housing, the outer wall of the first connecting block is slidably connected to the inside of the guide plate, the outer wall of the second connecting block is slidably connected to the inside of the guide plate, and a reinforcing plate is fixedly connected to the upper surface of the clamping block.

[0010] Furthermore, a guide rod is fixedly connected inside the guide plate, a slider is slidably connected to the outer wall of the guide rod, the lower surface of the clamping block is fixedly connected to the upper surface of the slider, and a soft pad is fixedly connected to the outer wall of the clamping block.

[0011] Furthermore, an inner liner is fixedly connected to the inner wall of the outer cover, and a button is slidably connected inside the outer cover, with the button output end slidably connected to the outer wall of the card block.

[0012] Furthermore, a control switch is fixedly connected to the outer wall of the housing.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, pressing the welding knife allows the extrusion block two to press the extrusion block one. After the extrusion block one is pressed, it drives the connecting plate to move together, so that the locking block and the locking groove inside the connecting block coincide with each other, thereby fixing the welding knife. This fixing method is simple to operate and greatly reduces the difficulty of replacing the welding knife. Compared with the existing screw fixing method, there is no need to tighten the screws one by one, saving a lot of time, facilitating daily maintenance and replacement, effectively shortening equipment downtime and improving production efficiency.

[0015] 2. In this utility model, the motor drives the gear to rotate, and the rotation of the gear drives the racks on both sides to move, thereby realizing the clamping blocks on both sides to clamp the parts inward and achieve the purpose of fixing them. At the same time, the guide plate and the guide rod cooperate with each other to play a stable guiding role during the movement of the clamping blocks. This allows the clamping blocks to move stably when clamping the parts, avoiding the clamping offset problem caused by equipment vibration, ensuring the stability of clamping, helping to improve welding quality, and ensuring the welding accuracy and structural stability of automotive parts. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a fixed welding device for automobile parts production proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the outer shell structure of a fixed welding device for automobile parts production proposed in this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0019] Figure 4 for Figure 2 Enlarged view of point B in the image.

[0020] Legend:

[0021] 1. Shell; 2. Extension block; 3. Bracket; 4. Outer shell; 5. Hydraulic cylinder; 6. Control switch; 7. Reinforcing plate; 8. Clamping block; 9. Guide plate; 10. Connecting block one; 11. Rack; 12. Connecting block two; 13. Motor; 14. Gear; 15. Soft pad; 16. Guide rod; 17. Slider one; 18. Button; 19. Outer cover; 20. Spring one; 21. Extrusion block one; 22. Slider two; 23. Connecting plate; 24. Extrusion block two; 25. Inner liner; 26. Welding knife; 27. Clamping block; 28. Spring two; 29. ​​Connecting sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of a fixed welding device for automotive parts production, comprising a housing 1, an extension block 2 fixedly connected to the outer wall of the housing 1, the extension block 2 expanding the device to facilitate the installation of a bracket 3 on the protruding part, a bracket 3 fixedly connected to the upper surface of the extension block 2, a shell 4 slidably connected to the outer wall of the bracket 3, a hydraulic cylinder 5 fixedly connected inside the shell 4, the hydraulic cylinder 5 providing power to the welding blade 26 to move it up and down, an outer cover 19 fixedly connected to the output end of the hydraulic cylinder 5, the outer cover 19 not only providing a carrier for the installation of the welding blade 26, but also providing protection, a second extrusion block 24 fixedly connected inside the outer cover 19, a first extrusion block 21 slidably connected to the outer wall of the second extrusion block 24, a connecting plate 23 fixedly connected to the side of the first extrusion block 21 away from the outer cover 19, a locking block 27 slidably connected inside the connecting plate 23, and a welding blade 26 slidably connected to the side of the connecting plate 23 away from the second extrusion block 24, when the welding blade 26 is pressed, the second extrusion block 24 can press the first extrusion block 21, thereby allowing the first extrusion block 21 to drive the connecting plate 26. The plate 23 moves downwards. When the slot inside the connecting plate 23 coincides with the locking block 27, the welding knife 26 can be fixed. The welding knife 26 is equipped with a spring-loaded component. A slider 22 is fixedly connected to the side of the connecting plate 23 away from the extrusion block 21. A spring 20 is fixedly connected to the inside of the welding knife 26. The end of the spring 20 near the connecting plate 23 is fixedly connected to the outer wall of the slider 22. The spring-loaded component includes a connecting sleeve 29. The outer wall of the connecting sleeve 29 is fixedly connected to the inside of the welding knife 26. A spring is installed inside the connecting sleeve 29. Spring 28 has two ends fixedly connected to the end of the locking block 27 away from the connecting plate 23. The setting of spring 28 can provide a reaction force for the return of the locking block 27. The inner wall of the outer cover 19 is fixedly connected to the inner liner 25. The button 18 is slidably connected inside the outer cover 19. The output end of the button 18 is slidably connected to the outer wall of the locking block 27. The setting of the button 18 can allow the locking block 27 to return to the inside of the slot of the connecting plate 23, thereby achieving the disassembly effect. The outer wall of the housing 1 is fixedly connected to the control switch 6, which can control the equipment.

[0024] Specifically, an extension block 2 is fixedly connected to the outer wall of the housing 1. The extension block 2 is of great significance because it breaks through the spatial limitations of the housing 1 itself. By extending outward, it expands the usable space of the equipment, allowing the support 3 to be stably mounted on the upper surface of the extension block 2. The support 3 is fixedly connected to the upper surface of the extension block 2, and the outer shell 4 is slidably connected to the outer wall of the support 3. The support 3 not only provides support for the outer shell 4, ensuring that the outer shell 4 slides stably within a certain range, but also allows the outer shell 4 to be flexibly adjusted according to the needs of actual welding operations, such as fine-tuning in height and angle, to adapt to the welding work of automotive parts of different shapes and sizes, thus enhancing the versatility and adaptability of the device. The outer shell 4 is slidably connected to the outer wall of the support 3, and a liquid is fixedly connected inside the outer shell 4. The hydraulic cylinder 5 is protected by the outer casing 4 from external environmental interference and damage, extending its service life. An outer cover 19 is fixedly connected to the output end of the hydraulic cylinder 5. The outer cover 19 not only provides a carrier for the installation of the welding knife 26 but also serves a protective function. An extrusion block 24 is fixedly connected inside the outer cover 19. An extrusion block 21 is slidably connected to the outer wall of the extrusion block 24. The extrusion block 24 and extrusion block 21 cooperate with each other. When the welding knife 26 is pressed, the extrusion block 24 can transmit external force to the extrusion block 21, causing the extrusion block 21 to slide on the outer wall of the extrusion block 24. A connecting plate 23 is fixedly connected to the side of the extrusion block 21 away from the outer cover 19. When the extrusion block 21 is squeezed by the extrusion block 24, it can drive the connecting plate 23. The connecting plate 23 moves together with the connecting plate 23. A locking block 27 is slidably connected inside the connecting plate 23. A welding blade 26 is slidably connected to the side of the connecting plate 23 away from the second extrusion block 24. Pressing the welding blade 26 causes the second extrusion block 24 to press against the first extrusion block 21, thereby causing the first extrusion block 21 to move the connecting plate 23 upwards. When the locking slot inside the connecting plate 23 coincides with the locking block 27, the welding blade 26 is fixed. A spring-loaded component is installed inside the welding blade 26. A slider 22 is fixedly connected to the side of the connecting plate 23 away from the first extrusion block 21. A spring 20 is fixedly connected inside the welding blade 26. The end of the spring 20 closest to the connecting plate 23 is fixedly connected to the outer wall of the slider 22. The spring 20 and the slider 22 cooperate with each other when welding... After the blade 26 is installed, spring 20 is in a certain extended state. Slider 22 applies a reverse elastic force to connecting plate 23, making the engagement between locking block 27 and the slot of connecting plate 23 tighter, further enhancing the fixing effect of welding blade 26. The return assembly includes connecting sleeve 29, whose outer wall is fixedly connected to the inside of welding blade 26. Spring 28 is installed inside connecting sleeve 29, with both ends fixedly connected to the end of locking block 27 away from connecting plate 23. Spring 28 provides a reaction force for the return of locking block 27. When disassembling welding blade 26, pressing button 18 moves locking block 27, disengaging it from the slot of connecting plate 23, thus disassembling welding blade 26.An inner liner 25 is fixedly connected to the inner wall of the outer casing 19. The inner liner 25 further enhances the protection of the internal components by the outer casing 19. A button 18 is slidably connected inside the outer casing 19. The output end of the button 18 is slidably connected to the outer wall of the locking block 27. The button 18 allows the locking block 27 to return to the slot of the connecting plate 23, thereby achieving the disassembly effect. A control switch 6 is fixedly connected to the outer wall of the housing 1, which can control the equipment.

[0025] Reference Figure 1 - Figure 3 A motor 13 is fixedly connected inside the housing 1, providing driving force to a gear 14. The output end of the motor 13 is fixedly connected to the gear 14. A rack 11 is slidably connected inside the housing 1, with the gear 14 meshing with it. The motor 13 drives the gear 14 to rotate, which in turn drives the meshing rack 11 to slide. A connecting block 10 and a connecting block 12 are fixedly connected to the upper surface of the rack 11. A clamping block 8 is fixedly connected to the upper surface of the connecting block 10, and the lower surface of the clamping block 8 is fixedly connected to the upper surface of the connecting block 12. The connection of the connecting blocks 10 and 12 allows the clamping blocks 8 on both sides to move inward, thereby enabling the movement of automotive parts. The clamping and fixing effect is as follows: A guide plate 9 is fixedly connected to the upper surface of the housing 1; the outer wall of connecting block 10 is slidably connected to the inside of the guide plate 9; the outer wall of connecting block 2 12 is slidably connected to the inside of the guide plate 9; a reinforcing plate 7 is fixedly connected to the upper surface of the clamping block 8; the reinforcing plate 7 can strengthen the clamping block 8 itself and increase its service life; a guide rod 16 is fixedly connected to the inside of the guide plate 9; a slider 17 is slidably connected to the outer wall of the guide rod 16; the lower surface of the clamping block 8 is fixedly connected to the upper surface of the slider 17; the setting of the guide plate 9 and the guide rod 16 allows the clamping block 8 to move more smoothly and prevents the automotive parts from shifting; a soft pad 15 is fixedly connected to the outer wall of the clamping block 8; the setting of the soft pad 15 can prevent the parts from being damaged due to excessive compression.

[0026] Specifically, a motor 13 is fixedly connected inside the housing 1. The motor 13 serves as the core source of clamping power in the entire device, providing a stable and continuous driving force to the gear 14. The output end of the motor 13 is fixedly connected to the gear 14, which rotates under the drive of the motor 13. The gear 14 converts the rotational motion of the motor 13 into the linear motion of the rack 11. A rack 11 is slidably connected inside the housing 1, meshing with the gear 14. The rack 11 slides under the drive of the gear 14, acting as a crucial bridge connecting the rotational motion of the gear 14 and the linear motion of the clamping block 8. The length and pitch of the rack 11 are carefully designed to ensure… During engagement with gear 14, power can be transmitted smoothly, and it can slide smoothly on the track inside the housing 1 according to actual needs, driving the connecting blocks 10 and 12 connected thereto to move synchronously. The motor 13 drives gear 14 to rotate, and the rotation of gear 14 drives the rack 11 connected to it to slide, realizing the rapid positioning and precise clamping of clamping block 8, which greatly improves the fixing efficiency and stability of automotive parts. Connecting blocks 10 and 12 are fixedly connected to the upper surface of rack 11. Connecting blocks 10 and 12 play a role in... The connecting rack 11 and clamping block 8 precisely transmit the linear motion of the rack 11 to the clamping block 8. The clamping block 8 is fixedly connected to the upper surface of connecting block 10, and the lower surface of the clamping block 8 is fixedly connected to the upper surface of connecting block 2 12. The arrangement of connecting block 10 and connecting block 2 12 allows the clamping blocks 8 on both sides to move inward, thereby achieving the effect of clamping and fixing automotive parts. A guide plate 9 is fixedly connected to the upper surface of the housing 1. The outer wall of connecting block 10 and the outer wall of connecting block 2 12 are slidably connected to the inside of the guide plate 9. The guide plate 9 provides precise guidance for the movement of connecting block 10 and connecting block 2 12. The function is to make it move linearly along the track inside the guide plate 9. A reinforcing plate 7 is fixedly connected to the upper surface of the clamping block 8. The reinforcing plate 7 can strengthen the clamping block 8 itself and increase its service life. A guide rod 16 is fixedly connected inside the guide plate 9. A slider 17 is slidably connected to the outer wall of the guide rod 16. The lower surface of the clamping block 8 is fixedly connected to the upper surface of the slider 17. The cooperation between the guide rod 16 and the slider 17 further enhances the smoothness of the movement of the clamping block 8. The guide rod 16 provides stable support and guidance for the slider 17. A soft pad 15 is fixedly connected to the outer wall of the clamping block 8. The soft pad 15 can prevent damage to the parts due to excessive compression.

[0027] Working principle: Before starting the equipment, the welding blade 26 needs to be placed on the side of the connecting plate 23 away from the extrusion block 24. Pressing down the welding blade 26 causes the extrusion block 24 to be pressurized and squeeze the extrusion block 21. The extrusion block 21 slides on the outer wall of the extrusion block 24, causing the connecting plate 23 to move upward. When the internal groove of the connecting plate 23 coincides with the locking block 27, the locking block 27 is locked into the groove under the elastic force of the spring 28, thus fixing the welding blade 26. At the same time, the spring 20 is in the extended state. The slider 22 applies a reverse elastic force to the connecting plate 23, further enhancing the fixing effect of the welding knife 26. When the welding knife 26 needs to be replaced, press the button 18 inside the outer cover 19. The output end of the button 18 pushes the locking block 27, causing it to overcome the elastic force of the spring 28 and disengage from the slot of the connecting plate 23. At this time, the welding knife 26 is no longer fixed by the locking block 27 and can be removed from the device to complete the disassembly operation. When fixing the parts again, start the motor 13 by operating the control switch 6. The output end of 13 drives the gear 14 to rotate. The gear 14 meshes with the rack 11, converting the rotational motion of the gear 14 into the linear motion of the rack 11, causing the rack 11 to slide inside the housing 1. The connecting block 10 and connecting block 12 on the upper surface of the rack 11 move synchronously with the rack 11, thereby driving the clamping block 8 on the upper surface of the connecting block 10 and the clamping block 8 on the upper surface of the connecting block 12 to move inward. Under the cooperation of the guide plate 9 and the guide rod 16, the clamping block 8 moves smoothly along the internal track of the guide plate 9, tightly clamping the automotive parts from both sides. The soft pad 15 on the outer wall of the clamping block 8 can prevent damage to the parts due to excessive compression, and the reinforcing plate 7 on the upper surface of the clamping block 8 can enhance the strength of the clamping block 8 and extend its service life. The hydraulic cylinder 5 is started by the control switch 6. The output end of the hydraulic cylinder 5 pushes the outer cover 19 and the welding knife 26 inside to move downward to a suitable position to perform welding operations on the fixed automotive parts. During the welding process, all components of the equipment work together to ensure the stable operation of the welding knife 26 and guarantee the welding quality.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixed welding device for automobile parts production, comprising a housing (1), characterized in that: An extension block (2) is fixedly connected to the outer wall of the housing (1). A bracket (3) is fixedly connected to the upper surface of the extension block (2). An outer shell (4) is slidably connected to the outer wall of the bracket (3). A hydraulic cylinder (5) is fixedly connected inside the outer shell (4). An outer cover (19) is fixedly connected to the output end of the hydraulic cylinder (5). An extrusion block two (24) is fixedly connected inside the outer cover (19). An extrusion block one (21) is slidably connected to the outer wall of the extrusion block two (24). The side of the extrusion block one (21) away from the outer cover (19) is fixedly connected to... A connecting plate (23) is connected, and a locking block (27) is slidably connected inside the connecting plate (23). A welding knife (26) is slidably connected to the side of the connecting plate (23) away from the second extrusion block (24). A spring-loaded component is provided inside the welding knife (26). A slider (22) is fixedly connected to the side of the connecting plate (23) away from the first extrusion block (21). A spring (20) is fixedly connected inside the welding knife (26). One end of the spring (20) near the connecting plate (23) is fixedly connected to the outer wall of the slider (22).

2. The fixed welding device for automobile parts production according to claim 1, characterized in that: The rebound assembly includes a connecting sleeve (29), the outer wall of which is fixedly connected to the inside of the welding knife (26), and a second spring (28) is provided inside the connecting sleeve (29). Both ends of the second spring (28) are fixedly connected to the end of the locking block (27) away from the connecting plate (23).

3. The fixed welding device for automobile parts production according to claim 1, characterized in that: A motor (13) is fixedly connected inside the housing (1), and a gear (14) is fixedly connected to the output end of the motor (13). A rack (11) is slidably connected inside the housing (1), and the gear (14) meshes with the rack (11).

4. The fixed welding device for automobile parts production according to claim 3, characterized in that: A connecting block one (10) is fixedly connected to the upper surface of the rack (11), a connecting block two (12) is fixedly connected to the upper surface of the rack (11), a clamping block (8) is fixedly connected to the upper surface of the connecting block one (10), and the lower surface of the clamping block (8) is fixedly connected to the upper surface of the connecting block two (12).

5. A fixed welding device for automobile parts production according to claim 4, characterized in that: A guide plate (9) is fixedly connected to the upper surface of the housing (1), the outer wall of the first connecting block (10) is slidably connected to the inside of the guide plate (9), the outer wall of the second connecting block (12) is slidably connected to the inside of the guide plate (9), and a reinforcing plate (7) is fixedly connected to the upper surface of the clamping block (8).

6. The fixed welding device for automobile parts production according to claim 5, characterized in that: The guide plate (9) is fixedly connected to the guide rod (16), and the outer wall of the guide rod (16) is slidably connected to the slider (17). The lower surface of the clamping block (8) is fixedly connected to the upper surface of the slider (17), and the outer wall of the clamping block (8) is fixedly connected to the soft pad (15).

7. The fixed welding device for automobile parts production according to claim 1, characterized in that: The inner wall of the outer cover (19) is fixedly connected to the inner liner (25), and the button (18) is slidably connected inside the outer cover (19). The output end of the button (18) is slidably connected to the outer wall of the card block (27).

8. A fixed welding device for automobile parts production according to claim 1, characterized in that: A control switch (6) is fixedly connected to the outer wall of the housing (1).