Positioning tool for welding processing

Abstract

The present application relates to the technical field of welding processing, and specifically discloses a positioning tool for welding processing, which comprises a first support frame arranged at the left side below the inner side of a protective cover; a positioning mechanism arranged in the positioning plate for facilitating welding fixation; a limiting mechanism arranged on the side of the positioning plate for facilitating welding angle adjustment; and a purification mechanism arranged at the back of the protective cover for processing welding fume. The positioning tool for welding processing can quickly adapt to the clamping and positioning of workpieces of different lengths and widths, and can realize flexible clamping with the cooperation of a pressure sensor without damaging the surface of the workpiece. The clamping is firm and reliable. The motor drive and the screw drive are used to realize accurate adjustment of the welding angle, the extrusion disc can quickly lock the positioning plate, the offset and shaking during welding are avoided, and the welding precision is improved. In the welding process, smoke and harmful gas are absorbed in real time, discharged after filtration and purification, and the working environment and the health of the operator are protected.

Description

Technical Field

[0001] This invention relates to the field of welding processing technology, specifically to a positioning fixture for welding processing. Background Technology

[0002] With the rapid development of the manufacturing industry, the field of metal processing is constantly expanding and deepening. Metal joining and forming processes are widely used in many industries, such as automobile manufacturing, shipbuilding, and aerospace. Welding, as one of the key processes for metal joining, directly affects product performance and production costs in terms of quality and efficiency. Against this backdrop, various welding-related equipment and processes are constantly emerging to improve welding quality, increase production efficiency, reduce worker labor intensity, and ensure operational safety.

[0003] For example, Chinese patent CN221435522U discloses a welding positioning fixture for PCBA motherboard processing. This patent uses a positioning clamping component to position the PCBA motherboard during processing. In conjunction with a first drive motor and a second drive motor, the PCBA motherboard can be flipped, which improves processing efficiency, enables uninterrupted automatic loading and unloading operations, reduces the floor space of the production line, and the lateral adjustment mechanism can be adapted to PCBA motherboards of different sizes and models.

[0004] For example, Chinese patent CN213560833U discloses a positioning fixture for welding aluminum alloy templates. This patent uses the cooperation between the pre-reserved slot and the pre-reserved block to clamp the mounting frame towards the aluminum template by disassembling the locking bolts. The pre-reserved block is then fixed above the pre-reserved slot by the cooperation between the locking bolts and the through hole. At the same time, the two vertical plates are pulled by the action of the return spring, so that the aluminum template components overlap. This makes it convenient for the device to work with aluminum templates of different sizes.

[0005] However, while existing positioning fixtures can clamp workpieces, their applicability is limited and they cannot meet diverse workpiece positioning needs. At the same time, adjusting the welding angle is extremely inconvenient, affecting the flexibility and efficiency of welding operations. Furthermore, during welding operations, the fixtures cannot effectively handle the polluting gases generated, posing a potential threat to the working environment and personnel health. Therefore, there is still room for further improvement.

[0006] Therefore, we propose a positioning fixture for welding to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a positioning fixture for welding processing, which solves the problems of the prior art positioning fixtures mentioned above. Although the positioning fixtures can clamp the workpiece during use, their application range is limited and they are difficult to meet the diverse positioning needs of workpieces. At the same time, adjusting the welding angle is extremely inconvenient, affecting the flexibility and efficiency of welding operations. In addition, during the welding operation, the fixture cannot effectively deal with the polluting gases generated, which poses a potential threat to the working environment and personnel health. Therefore, there is still room for further improvement.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for welding processing, comprising: A protective cover, wherein a first support frame is provided on the lower left side of the inner side of the protective cover, and a second support frame is provided on the lower right side of the inner side of the protective cover. The first support frame is rotatably connected to a first connecting plate, the first connecting plate is fixedly connected to a positioning plate, and the first connecting plate is fixedly connected to the output shaft of a first motor. The first motor is located on the side of the first support frame. Also includes: The positioning plate is provided with a positioning mechanism for convenient fixed welding, and a fixed positioning component is provided on the upper right side of the positioning plate, and a movable positioning component is slidably connected on the upper left side of the positioning plate. The side of the positioning plate is provided with a limiting mechanism for convenient adjustment of the welding angle, and the second support frame is rotatably connected to the second connecting plate, and the second connecting plate is fixedly connected to the positioning plate. The rear side of the protective cover is equipped with a purification mechanism for treating welding fumes, and the inner right side of the protective cover is equipped with a smoke sensor.

[0009] Preferably, the protective cover is provided with a display screen and a controller on the front side, and a lighting component is provided on the upper inner side of the protective cover, and the smoke sensor is symmetrical about the vertical central axis of the protective cover.

[0010] Preferably, the limiting mechanism is composed of a slide rod, an extrusion plate, and a connecting frame. The slide rod is slidably connected to the slide groove, and the slide groove is opened inside the second support frame. The slide rods are distributed in an array, and an extrusion plate is provided on the left side of the slide rod. The extrusion plate is tightly fitted with the second connecting plate, and the slide rod is fixedly connected to the connecting frame.

[0011] Preferably, the connecting frame is threadedly driven by the first lead screw, and the first lead screw is fixedly connected to the output shaft of the second motor. The second motor is located on the right side of the second support frame, and the first lead screw is rotatably connected to the n-shaped plate on the side of the second support frame.

[0012] Preferably, the positioning mechanism includes a fixed positioning component and a movable positioning component. Both the fixed positioning component and the movable positioning component include an L-shaped plate, a limiting groove, a connecting block, a bidirectional threaded rod, a driven gear, a driving gear, a drive motor, a horizontal plate, a second lead screw, a limiting disc, a limiting post, and a pressure sensor. The movable positioning component is connected to the transmission component, and the transmission component is located on the lower side of the positioning plate. The transmission component includes a motor, a threaded rod, and a limiting rod.

[0013] Preferably, both the fixed positioning component and the movable positioning component have an L-shaped plate inside, and the L-shaped plate has a limiting groove inside. A connecting block is slidably connected inside the limiting groove, and the connecting block is threadedly driven by the bidirectional threaded rod.

[0014] Preferably, the bidirectional threaded rod is rotatably connected to the L-shaped plate, and the bidirectional threaded rod is fixedly connected to the driven gear, the driven gear is meshed with the driving gear, the driving gear is fixedly connected to the output shaft of the drive motor, and the drive motor is located on the side of the L-shaped plate.

[0015] Preferably, the connecting block is fixedly connected to the horizontal plate, and the connecting block is symmetrical about the vertical central axis of the L-shaped plate. The horizontal plate is threadedly driven by the second lead screw, and the second lead screw is rotatably connected to the limiting plate.

[0016] Preferably, a limiting post is provided on the upper side of the limiting plate, and the limiting post is slidably connected to the horizontal plate, wherein the side of the limiting plate is slightly wider than the side of the L-shaped plate.

[0017] Preferably, the purification mechanism is composed of an air intake pipe, a treatment box, and an air intake pump. The air intake pipe is fixedly connected to the rear side of the protective cover and to the treatment box. The rear side of the treatment box is fixedly connected to the box door by bolts, and an air intake pump is provided on the rear side of the box door.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the positioning fixture for welding processing can quickly adapt to the clamping and positioning of workpieces of different lengths and widths, and achieves flexible clamping with the help of pressure sensors, without damaging the workpiece surface, and the clamping is firm and reliable; the welding angle can be precisely adjusted through motor drive and lead screw transmission, and the extrusion plate can quickly lock the positioning plate to avoid displacement and shaking during welding, thereby improving welding accuracy; during the welding process, it absorbs fumes and harmful gases in real time, and releases them after filtration and purification, protecting the working environment and the health of operators, and meeting the requirements of environmentally friendly production; 1. Equipped with a positioning plate, fixed positioning components, and moving positioning components, it can quickly adapt to the clamping and positioning of workpieces of different lengths and widths. With the help of pressure sensors, it can achieve flexible clamping without damaging the workpiece surface, and the clamping is firm and reliable.

[0019] 2. A limit mechanism, a second connecting plate, and a second support frame are provided. The welding angle can be precisely adjusted through motor drive and lead screw transmission. The extrusion plate can quickly lock the positioning plate to avoid deviation and shaking during welding, thereby improving welding accuracy.

[0020] 3. Equipped with a purification mechanism, air intake pipe and treatment box, it absorbs fumes and harmful gases in real time during the welding process, and releases them after filtration and purification, protecting the working environment and the health of operators, and meeting the requirements of environmentally friendly production.

[0021] 4. Equipped with a protective cover, lighting components, and a smoke sensor, it effectively blocks welding sparks from flying, provides sufficient working lighting, monitors the smoke concentration in real time, and automatically adjusts the purification power, making the operation safer and smarter.

[0022] 5. Equipped with a first motor, a first connecting plate, and a positioning plate, it can drive the workpiece to automatically rotate, and cooperate with the positioning mechanism to achieve multi-sided continuous welding, reduce the number of manual adjustments, reduce labor intensity, and improve overall processing efficiency. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a first-view structural diagram of the entire invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective. Figure 3 This is a schematic diagram of the connection structure between the positioning plate and the positioning component of the present invention; Figure 4 This is an exploded view of the slide groove and slide bar of the present invention; Figure 5 This is a schematic diagram of the L-shaped plate cross-section structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a front view structural diagram of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of the exploded structure of the horizontal plate and the second lead screw of the present invention.

[0024] In the diagram: 1. Protective cover; 2. Display screen; 3. Controller; 4. First support frame; 5. First motor; 6. First connecting plate; 7. Positioning plate; 8. Second connecting plate; 9. Second support frame; 10. Slide groove; 11. Slide rod; 12. Extrusion plate; 13. Connecting frame; 14. First lead screw; 15. Second motor; 16. Fixed positioning assembly; 17. Moving positioning assembly; 18. Transmission assembly; 19. L-shaped plate; 20. Limiting groove; 21. Connecting block; 22. Bidirectional threaded rod; 23. Driven gear; 24. Drive gear; 25. Drive motor; 26. Horizontal plate; 27. Second lead screw; 28. Limiting plate; 29. ​​Limiting post; 30. Pressure sensor; 31. Lighting assembly; 32. Smoke sensor; 33. Suction pipe; 34. Processing box; 35. Box door; 36. Suction pump. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Please see Figures 1-9 The present invention provides a technical solution: a positioning fixture for welding processing, comprising: a protective cover 1, a display screen 2, a controller 3, a first support frame 4, a first motor 5, a first connecting plate 6, a positioning plate 7, a second connecting plate 8, a second support frame 9, a sliding groove 10, a sliding rod 11, a pressing plate 12, a connecting frame 13, a first lead screw 14, a second motor 15, a fixed positioning assembly 16, a moving positioning assembly 17, a transmission assembly 18, an L-shaped plate 19, a limiting groove 20, a connecting block 21, a bidirectional threaded rod 22, a driven gear 23, a driving gear 24, a drive motor 25, a horizontal plate 26, a second lead screw 27, a limiting plate 28, a limiting post 29, a pressure sensor 30, a lighting assembly 31, a smoke sensor 32, an air suction pipe 33, a processing box 34, a box door 35, and an air suction pump 36.

[0027] While existing positioning fixtures can clamp workpieces, their applicability is limited and they cannot meet diverse workpiece positioning needs. Furthermore, adjusting the welding angle is extremely inconvenient, affecting the flexibility and efficiency of welding operations. In addition, the fixtures cannot effectively handle the polluting gases generated during welding, posing a potential threat to the working environment and personnel health. Therefore, there is room for further improvement.

[0028] like Figures 1-9As shown, a display screen 2 and a controller 3 are provided on the front side of the protective cover 1. A first support frame 4 is provided on the lower left side of the inner side of the protective cover 1, and a second support frame 9 is provided on the lower right side of the inner side of the protective cover 1. The first support frame 4 is rotatably connected to the first connecting plate 6, and the first connecting plate 6 is fixedly connected to the positioning plate 7. The first connecting plate 6 is fixedly connected to the output shaft of the first motor 5, and the first motor 5 is located on the side of the first support frame 4. A fixed positioning component 16 is provided on the upper right side of the positioning plate 7, and a movable positioning component 17 is slidably connected on the upper left side of the positioning plate 7. A limiting mechanism for convenient adjustment of the welding angle is provided on the side of the positioning plate 7. The second support frame 9 is rotatably connected to the second connecting plate 8, and the second connecting plate 8 is fixedly connected to the positioning plate 7. A purification mechanism for treating welding fumes is provided on the rear side of the protective cover 1. A smoke sensor 32 is provided on the inner right side of the protective cover 1, and an illumination component 31 is provided on the upper inner side of the protective cover 1. The smoke sensor 32 is symmetrical about the vertical central axis of the protective cover 1.

[0029] The slide rod 11 is slidably connected to the slide groove 10, and the slide groove 10 is opened inside the second support frame 9. The slide rods 11 are arranged in an array, and an extrusion plate 12 is provided on the left side of the slide rod 11. The extrusion plate 12 is tightly fitted with the second connecting plate 8, and the slide rod 11 is fixedly connected to the connecting frame 13. The connecting frame 13 is threadedly driven by the first lead screw 14, and the first lead screw 14 is fixedly connected to the output shaft of the second motor 15. The second motor 15 is located on the right side of the second support frame 9, and the first lead screw 14 is rotatably connected to the n-shaped plate on the side of the second support frame 9. Both the fixed positioning assembly 16 and the movable positioning assembly 17 include an L-shaped plate 19, a limiting groove 20, a connecting block 21, a bidirectional threaded rod 22, a driven gear 23, a driving gear 24, a drive motor 25, a horizontal plate 26, a second lead screw 27, a limiting disc 28, a limiting post 29, and a pressure sensor 30. The movable positioning assembly 17 is connected to the transmission assembly 18, and the transmission assembly 18 is located on the lower side of the positioning plate 7. The transmission assembly 18 includes a motor, a threaded rod, and a limiting rod.

[0030] Both the fixed positioning component 16 and the movable positioning component 17 have L-shaped plates 19 inside, and each L-shaped plate 19 has a limiting groove 20 inside. A connecting block 21 is slidably connected inside the limiting groove 20, and the connecting block 21 is threadedly driven by a bidirectional threaded rod 22. The bidirectional threaded rod 22 is rotatably connected to the L-shaped plate 19, and is fixedly connected to a driven gear 23. The driven gear 23 meshes with a driving gear 24, and the driving gear 24 is fixedly connected to the output shaft of a drive motor 25, which is located on the side of the L-shaped plate 19. The connecting block 21 is fixedly connected to a horizontal plate 26, and is symmetrical about the vertical central axis of the L-shaped plate 19. The horizontal plate 26 is threadedly driven by a second lead screw 27, and the second lead screw 27 is rotatably connected to a limiting plate 28. The purification mechanism is composed of an air intake pipe 33, a treatment box 34 and an air intake pump 36. The air intake pipe 33 is fixedly connected to the rear side of the protective cover 1 and the air intake pipe 33 is fixedly connected to the treatment box 34. The rear side of the treatment box 34 is fixedly connected to the box door 35 by bolts, and the air intake pump 36 is provided on the rear side of the box door 35.

[0031] When using positioning fixtures for welding processes, such as Figure 1 , Figure 7 , Figure 8 As shown, before welding, the workpiece to be processed is placed stably on the upper working surface of the positioning plate 7. The fixed positioning component 16 is used as the fixed reference end. The transmission component 18 below the positioning plate 7 is started by the controller 3. The transmission component 18 drives the moving positioning component 17 to move horizontally along the positioning plate 7. The clamping distance is automatically adjusted according to the actual length of the workpiece, so that the fixed positioning component 16 and the moving positioning component 17 respectively fit against the two ends of the workpiece, quickly completing the initial positioning and centering of the workpiece and ensuring the accurate placement of the workpiece.

[0032] like Figure 5 , Figure 6 As shown, after the initial positioning is completed, the drive motors 25 inside the fixed positioning assembly 16 and the moving positioning assembly 17 are started simultaneously. The output shaft of the drive motor 25 drives the driving gear 24 to rotate at a constant speed. The driving gear 24 and the driven gear 23 mesh stably, transmitting power to the bidirectional threaded rod 22, causing the bidirectional threaded rod 22 to rotate smoothly around its own axis. Under the transmission action of the bidirectional threaded rod 22, the two sets of connecting blocks 21 located inside the limiting groove 20 can move linearly back and forth along the limiting groove 20, and can move towards each other or away from each other according to the control direction: when the drive motor 25 rotates forward, the two sets of connecting blocks 21 move towards each other, synchronously approaching and retracting towards the workpiece, driving the horizontal plate 26 to clamp the front and rear sides of the workpiece in the center, ensuring that the workpiece is in the center position of the tooling; when the drive motor 25 rotates in reverse, the two sets of connecting blocks 21 move away from each other, synchronously moving away from each other, quickly releasing the clamping, making it easy to pick up and put down the workpiece.

[0033] like Figure 9 As shown, after clamping from front to back, the second lead screw 27 is rotated, and the second lead screw 27 moves vertically downward along the horizontal plate 26, pushing the limiting plate 28 and the limiting post 29 downward to smoothly press the upper surface of the workpiece, so that the workpiece is reliably constrained in the vertical direction. The pressure sensor 30 set at the bottom of the limiting post 29 is electrically connected to the display screen 2. The pressure sensor 30 collects the clamping force signal in real time and transmits it to the display screen 2, which displays the current clamping pressure in numerical form. The operator can accurately adjust the screw depth of the second lead screw 27 according to the displayed value, and control the pressure within a reasonable range suitable for the material and thickness of the workpiece. This ensures that the workpiece does not shake, shift, or flip during the welding process, and avoids excessive pressure that may cause workpiece deformation, indentation, or surface scratches. Ultimately, it achieves synchronous constraint of the workpiece in multiple directions (front, back, up, and down), achieving a stable, reliable, and non-destructive clamping and positioning effect, providing high-precision positioning guarantee for welding operations.

[0034] It should be noted that this device is compatible with two positioning methods: the side of the limiting plate 28 is slightly wider than the side of the L-shaped plate 19. When the workpiece to be welded is small and needs to be supported by the L-shaped plate 19, the workpiece can be placed on the upper side of the L-shaped plate 19, and the top surface of the workpiece can be directly pressed by the limiting plate 28. When the workpiece is large and does not need to be placed on the upper side of the L-shaped plate 19, the workpiece can be placed directly and stably on the upper side of the positioning plate 7. Taking advantage of the structural feature that the limiting plate 28 is wider than the L-shaped plate 19, the upper surface of the workpiece can be pressed directly downwards to achieve reliable clamping of large workpieces.

[0035] like Figure 1 , Figure 3 , Figure 4 As shown, when it is necessary to adjust the welding angle of the workpiece, the operator sends an angle adjustment command through the display screen 2 and the controller 3. First, the second motor 15 on the outside of the second support frame 9 is started. The second motor 15 drives the first lead screw 14 to rotate. Under the action of thread transmission, the connecting frame 13 and the slide rod 11 are driven to move smoothly to the right along the slide groove 10, so that the extrusion plate 12 is separated from the second connecting plate 8, and the locking constraint on the second connecting plate 8 is released.

[0036] Subsequently, the first motor 5 on the side of the first support frame 4 is activated. The first motor 5 drives the positioning plate 7, the workpiece, and related components to rotate smoothly as a whole through the first connecting plate 6. The operator can flip the workpiece at multiple angles according to welding requirements to adjust it to the optimal welding posture. After the angle is determined, the second motor 15 is activated in the opposite direction, driving the extrusion plate 12 to move to the left and tightly press against the second connecting plate 8. The angle self-locking is achieved by relying on the end face friction, which effectively prevents the positioning plate 7 from shaking, moving, or shifting at an angle during welding, thereby improving welding consistency and processing accuracy.

[0037] like Figure 1 , Figure 2As shown, during the welding operation, the suction pump 36 runs continuously, drawing welding fumes and harmful gases into the treatment box 34 through the suction pipe 33 on the rear side of the protective cover 1. After multi-layer filtration and purification, the qualified gas is discharged. At the same time, the smoke sensor 32 monitors the smoke concentration inside the protective cover 1 in real time. When the smoke concentration exceeds the standard, the power of the suction pump 36 is automatically increased to enhance the smoke collection and purification effect. The lighting component 31 on the upper inner side of the protective cover 1 provides uniform and sufficient lighting. The protective cover 1 effectively blocks welding sparks and spatter, comprehensively improving operational safety and visibility. The treatment box 34 has a door 35 that is detachably connected to the rear side by bolts. After a period of use, the door 35 can be opened to quickly replace, clean, or maintain the filter components inside the treatment box 34, ensuring a long-term stable purification effect and extending the service life of the device.

[0038] After welding is completed, the second lead screw 27 is rotated in reverse to reset the limiting post 29 and the limiting plate 28 upwards. Then, the drive motor 25 is started to rotate in reverse to release the workpiece from the horizontal plate 26. Finally, the transmission component 18 drives the moving positioning component 17 back to its original position, and the workpiece can be safely removed. The entire device can be programmed with parameters such as clamping pressure, rotation angle, and suction power through the controller 3 and display screen 2 on the front of the protective cover 1, so as to realize automatic positioning, angle adjustment, and flue gas purification integrated automated operation, which greatly improves welding processing efficiency and operation convenience.

[0039] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0040] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A positioning fixture for welding processing, comprising: The protective cover (1) has a first support frame (4) on the lower left side of the inner side and a second support frame (9) on the lower right side of the inner side. The first support frame (4) is rotatably connected to the first connecting plate (6), and the first connecting plate (6) is fixedly connected to the positioning plate (7). The first connecting plate (6) is fixedly connected to the output shaft of the first motor (5), wherein the first motor (5) is located on the side of the first support frame (4). Its characteristic is that it further includes: The positioning plate (7) is provided with a positioning mechanism for convenient fixed welding, and a fixed positioning component (16) is provided on the upper right side of the positioning plate (7), and a movable positioning component (17) is slidably connected on the upper left side of the positioning plate (7). The side of the positioning plate (7) is provided with a limiting mechanism for adjusting the welding angle, and the second support frame (9) is rotatably connected to the second connecting plate (8), and the second connecting plate (8) is fixedly connected to the positioning plate (7). The protective cover (1) is provided with a purification mechanism for treating welding fumes on the rear side, and a smoke sensor (32) is provided on the right side of the inner side of the protective cover (1).

2. The positioning fixture for welding processing according to claim 1, characterized in that: The protective cover (1) is provided with a display screen (2) and a controller (3) on the front side, and a lighting component (31) is provided on the upper inner side of the protective cover (1), and the smoke sensor (32) is symmetrical about the vertical central axis of the protective cover (1).

3. The positioning fixture for welding processing according to claim 1, characterized in that: The limiting mechanism is composed of a slide rod (11), an extrusion plate (12) and a connecting frame (13). The slide rod (11) is slidably connected to the slide groove (10), and the slide groove (10) is opened inside the second support frame (9). The slide rods (11) are arranged in an array, and an extrusion plate (12) is provided on the left side of the slide rod (11). The extrusion plate (12) is tightly fitted with the second connecting plate (8), and the slide rod (11) is fixedly connected to the connecting frame (13).

4. The positioning fixture for welding processing according to claim 3, characterized in that: The connecting frame (13) is threadedly driven by the first lead screw (14), and the first lead screw (14) is fixedly connected to the output shaft of the second motor (15). The second motor (15) is located on the right side of the second support frame (9), and the first lead screw (14) is rotatably connected to the n-shaped plate on the side of the second support frame (9).

5. A positioning fixture for welding processing according to claim 1, characterized in that: The positioning mechanism includes a fixed positioning component (16) and a movable positioning component (17). Both the fixed positioning component (16) and the movable positioning component (17) include an L-shaped plate (19), a limiting groove (20), a connecting block (21), a bidirectional threaded rod (22), a driven gear (23), a driving gear (24), a drive motor (25), a horizontal plate (26), a second lead screw (27), a limiting plate (28), a limiting post (29), and a pressure sensor (30). The movable positioning component (17) is connected to the transmission component (18), and the transmission component (18) is located on the lower side of the positioning plate (7). The transmission component (18) includes a motor, a threaded rod, and a limiting rod.

6. A positioning fixture for welding processing according to claim 5, characterized in that: Both the fixed positioning component (16) and the moving positioning component (17) have an L-shaped plate (19) inside, and a limiting groove (20) is opened inside the L-shaped plate (19). A connecting block (21) is slidably connected inside the limiting groove (20), and the connecting block (21) is threadedly driven with the bidirectional threaded rod (22).

7. A positioning fixture for welding processing according to claim 6, characterized in that: The bidirectional threaded rod (22) is rotatably connected to the L-shaped plate (19), and the bidirectional threaded rod (22) is fixedly connected to the driven gear (23), and the driven gear (23) is meshed with the driving gear (24), and the driving gear (24) is fixedly connected to the output shaft of the drive motor (25), and the drive motor (25) is located on the side of the L-shaped plate (19).

8. A positioning fixture for welding processing according to claim 6, characterized in that: The connecting block (21) is fixedly connected to the horizontal plate (26), and the connecting block (21) is symmetrical about the vertical center axis of the L-shaped plate (19). The horizontal plate (26) is threadedly driven by the second lead screw (27), and the second lead screw (27) is rotatably connected to the limiting plate (28).

9. A positioning fixture for welding processing according to claim 8, characterized in that: The upper side of the limiting plate (28) is provided with a limiting post (29), and the limiting post (29) is slidably connected to the horizontal plate (26), wherein the side of the limiting plate (28) is slightly wider than the side of the L-shaped plate (19).

10. A positioning fixture for welding processing according to claim 1, characterized in that: The purification mechanism is composed of an air intake pipe (33), a treatment box (34) and an air intake pump (36). The air intake pipe (33) is fixedly connected to the rear side of the protective cover (1) and the air intake pipe (33) is fixedly connected to the treatment box (34). The rear side of the treatment box (34) is fixedly connected to the box door (35) by bolts. The air intake pump (36) is provided on the rear side of the box door (35).

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