A spot welding device for PCBA processing

Abstract

The utility model belongs to electronic manufacturing technical field especially, a spot welding device for PCBA processing is provided, aiming at the traditional PCBA spot welding device of existing traditional PCBA spot welding device when using the board clamping effect is not good enough, and the board is easy to displace, there is inconvenient adjustment, work efficiency is limited and so on problem, present and propose the following scheme, including the bottom plate, the top fixed mounting of bottom plate has two support plates, two fixed mounting of two support plates has two fixed links, the outer wall sliding installation of two fixed links has two fixed bases, the bottom fixed mounting of two fixed bases has same mobile plate, in the utility model, the device passes through first screw rod and the coordinated control welding head horizontal and longitudinal movement, realizes the quick accurate positioning of welding spot, second screw rod linkage clamping unit whole translation, cooperates the movement of welding head and completes the double axle coordinated control, the modularization clamping unit is driven by the rack and pinion mechanism and is pressed frame, and the compatible different size board spare is pressed, equipment structure is simple, and the maintenance cost is low.

Description

Technical Field

[0001] This utility model relates to the field of electronic manufacturing technology, and in particular to a spot welding device for PCBA processing. Background Technology

[0002] In the field of electronics manufacturing, the processing quality of PCBA (Printed Circuit Board Assembly) boards directly affects the performance and reliability of electronic products. Spot soldering is one of the key processes in PCBA board processing, which achieves electrical connection and mechanical fixation by melting solder and filling it between the electronic component leads and the circuit board pads.

[0003] Traditional PCBA board spot welding equipment has several shortcomings. In terms of fixing the PCBA board, some devices use simple positioning slots or clamps, which are difficult to adapt to PCBA boards of different sizes and shapes, resulting in poor fixing effectiveness. During spot welding, the PCBA board is prone to displacement, leading to inaccurate welding positions and affecting welding quality. Furthermore, fixing and loosening the PCBA board is cumbersome, increasing production time and labor costs.

[0004] Regarding the movement and positioning of the spot welding head, some devices lack flexible spot welding head movement mechanisms, making it difficult to precisely adjust the position of the spot welding head and failing to meet the precise welding requirements of different weld points. Furthermore, traditional devices mostly rely solely on the movement of the spot welding head to change the spot welding position, resulting in low processing efficiency.

[0005] To address the aforementioned problems, this utility model document proposes a spot welding device for PCBA processing. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing PCBA spot welding devices, such as insufficient clamping effect on the boards, easy displacement of the boards, inconvenient adjustment, and limited work efficiency. Therefore, this invention proposes a spot welding device for PCBA processing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A spot welding device for PCBA processing includes:

[0009] The base plate has two support plates fixedly installed on its top, two fixed rods fixedly installed between the two support plates, two fixed seats slidably connected to the outer walls of the two fixed rods, and the same movable plate fixedly installed at the bottom of the two fixed seats. Multiple welding heads and material conveying pipes that cooperate with them are provided below the movable plate for spot welding PCBA boards.

[0010] And multiple fixing plates, all of which are fixedly installed on the top of the base plate and located below multiple welding heads;

[0011] It also includes a fixing component, which includes multiple clamping units, a second driving block, and multiple connecting blocks. Both sides of the second driving block and the multiple connecting blocks are fixedly connected to adjacent clamping units to combine the multiple clamping units into a whole. The multiple clamping units are used to clamp PCBA boards.

[0012] During operation, the PCBA board is fixed on the clamping unit, and the second drive block drives the fixing component to move so that the PCBA board is located below the welding head. The moving plate drives the welding head to move to align with the solder joint, and the welding head descends to perform spot welding.

[0013] In one possible design, the two support plates are rotatably connected by the same first screw, and a first motor is fixedly mounted on one side of one of the support plates. The output shaft of the first motor is fixedly connected to one end of the first screw, and two first drive blocks are threadedly connected to the outer wall of the first screw. Both first drive blocks are fixedly connected to the top of the corresponding fixed seat.

[0014] In one possible design, a corresponding mounting plate is fixedly installed on the top of each of the multiple welding heads, and multiple guide rods are fixedly installed on the top of each of the multiple mounting plates. One end of each of the multiple guide rods slides through a moving plate. A cylinder is provided on the top of each of the multiple mounting plates, and the cylinders are fixedly connected to the bottom of the moving plate. The piston rods of the cylinders are fixedly connected to the top of the corresponding mounting plates to realize the lifting and lowering of the multiple welding heads. Multiple material conveying pipes are fixedly installed on one side of adjacent welding heads and are inclined, with their outlets cooperating with the welding heating part of the welding head.

[0015] In one possible design, the clamping unit includes a base, on the top of which two rotating rods are rotatably mounted via a bracket. One end of each rotating rod is fixedly mounted with a gear, and the outer wall of each rotating rod is fitted with a torsion spring. One end of each torsion spring is fixedly connected to an adjacent gear, and the other end is fixedly connected to an adjacent bracket. Pressing frames are fixedly mounted on the sides of the two rotating rods that are close to each other, and the two pressing frames are pressed tightly against the top of the base under the action of the torsion springs.

[0016] In one possible design, a groove is provided on one side of the base, and two levers are slidably connected in the groove. Each of the two levers has a rack fixedly installed on its top, and each rack meshes with an adjacent gear. During operation, when the levers move closer to each other, they drive the gears to rotate, causing the pressing frame to lift.

[0017] In one possible design, two limiting brackets are fixedly installed on the top of each of the multiple fixed plates, and multiple clamping units are slidably disposed on the top of the corresponding fixed plates, with the base sides slidingly engaged with the adjacent limiting brackets. Limiting sliders are fixedly installed on both sides of the multiple bases, and the multiple limiting sliders are slidably connected to the inner wall of the adjacent limiting brackets.

[0018] In one possible design, a second screw is rotatably mounted on the top of the base plate via a bracket. A second motor is provided at one end of the second screw. The second motor is fixedly mounted on one side of an adjacent bracket, and its output shaft is fixedly connected to one end of the second screw. The second screw is threadedly connected to a second drive block.

[0019] In one possible design, the fixing component drives multiple clamping units to move synchronously through the movement of the second drive block.

[0020] In one possible design, during spot welding, the welding head descends to contact the weld point, the feed pipe delivers the welding material, and the welding head resets after the spot welding is completed.

[0021] In this application, during use, the operator can place the PCBA board to be processed on the base of multiple clamping units. By pressing the levers on both sides of the clamping unit, the levers slide horizontally along the slide groove and move closer to each other, which drives the rack and gear to mesh and rotate. When the gear rotates, it drives the rotating rod to rotate outward against the force of the torsion spring, which can lift the pressing frame. At this time, the PCBA board can be placed on the top of the base. After releasing the levers, the torsion spring automatically resets and drives the rotating rod to rotate back, so that the pressing frame presses the edge of the PCBA board to complete the fixation.

[0022] When the equipment is working, the second motor can drive the second screw to rotate, which in turn drives the second drive block, which is threaded to it, to move horizontally. Since the second drive block is linked to all clamping units through the connecting block, the entire fixing assembly moves synchronously along the limiting bracket, allowing the PCBA board to move directly below the welding head.

[0023] During operation, the first motor drives the first screw to rotate, causing two first drive blocks to move horizontally along the fixed rod. The first drive blocks, via a fixed base, adjust the position of the moving plate laterally, aligning the welding head with the soldering point on the PCBA board. Subsequently, multiple cylinders act synchronously, pushing the mounting plate vertically downwards along the guide rod, bringing the welding head into contact with the solder point. The feed pipe delivers solder to the heating section of the welding head, completing the spot welding process. After each welding operation, the cylinders quickly lift the welding head to its original position.

[0024] Following the pre-set working logic, and driven by the first and second motors respectively, the welding head and PCBA board can be adjusted simultaneously. Then, the welding head can be lowered and spot-welded again following the steps described above. In this way, continuous spot welding processing on the PCBA board can be completed.

[0025] After the welding work is completed, the operator can press and push the two levers again to release the pressing frame, and then take out the processed PCBA board.

[0026] Beneficial effects: In this utility model, the spot welding device for PCBA processing drives the welding head to move laterally through the first screw and controls the vertical stroke of the welding head with the cylinder, so as to achieve rapid and accurate alignment of the welding point position; the second screw links multiple clamping units to move synchronously, so that the PCBA board as a whole moves to the welding position, reducing the number of repositioning times; at the same time, it can also cooperate with the welding head to complete the vertical movement, and the welding point switching time is effectively shortened through dual-axis collaborative control;

[0027] In this utility model, the spot welding device for PCBA processing has a modular clamping unit that controls the gear-rack mechanism through an independent lever to operate the opening and closing of the pressing frame, which is compatible with PCBA boards of different sizes; at the same time, the sliding cooperation between the limiting slider and the bracket can ensure the movement stability of the clamping unit and prevent the workpiece from shifting.

[0028] In this utility model, the spot welding device for PCBA processing has an automatic reset pressing frame with torsion springs in the clamping unit, which enables rapid clamping and release of the PCBA board; the whole board synchronous movement mechanism avoids single-point adjustment and reduces manual intervention; during continuous spot welding, the welding head reset and workpiece displacement can be carried out synchronously, which improves work efficiency.

[0029] In this utility model, the spot welding device for PCBA processing has a double sliding structure of fixed rod and guide rod to ensure the smooth operation of the moving board; the drive block and connecting block integrate multiple clamping units into a linkage component, reducing the number of independent drive components and reducing maintenance costs and complexity;

[0030] In this invention, the device controls the horizontal and vertical movement of the welding head through the coordinated movement of the first screw and the cylinder, achieving rapid and accurate positioning of the weld point; the second screw links with the overall translation of the clamping unit, coordinating with the movement of the welding head to complete dual-axis coordinated control; the modular clamping unit drives the pressing frame through a gear-rack mechanism, compatible with different sized plates, and the torsion spring automatically resets to achieve rapid clamping of the plates; the device has few independent drive components, low complexity, and reduced maintenance costs. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural schematic diagram of a spot welding device for PCBA processing proposed in this utility model;

[0032] Figure 2 This is a schematic diagram of the welding head mounting structure of a spot welding device for PCBA processing proposed in this utility model;

[0033] Figure 3This is a schematic diagram of the second screw mounting structure of a spot welding device for PCBA processing proposed in this utility model;

[0034] Figure 4 This is a schematic diagram of the fixing component structure of a spot welding device for PCBA processing proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the clamping unit structure of a spot welding device for PCBA processing proposed in this utility model.

[0036] In the diagram: 1. Base plate; 2. Support plate; 3. Fixing rod; 4. First screw; 5. First motor; 6. First drive block; 7. Fixing seat; 8. Moving plate; 9. Cylinder; 10. Guide rod; 11. Mounting plate; 12. Welding head; 13. Feed pipe; 14. Fixing plate; 15. Limiting bracket; 16. Second screw; 17. Second motor; 18. Second drive block; 19. Connecting block; 20. Clamping unit; 21. Base; 22. Limiting slider; 23. Rotating rod; 24. Pressing frame; 25. Gear; 26. Torsion spring; 27. Pulley; 28. Slide groove; 29. ​​Rack. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] In one embodiment: Refer to Figure 1-5 A spot welding device includes: a base plate 1, a support structure, a movable welding structure, a fixed plate 14, and a fixing component.

[0039] In this embodiment, the base plate 1 serves as the fundamental support component of the entire device. Two support plates 2 are fixedly installed on its top, parallel to each other and spaced apart. Two fixing rods 3 are fixedly installed between the two support plates 2, arranged horizontally and parallelly. Two fixing seats 7 are slidably installed on the outer walls of the two fixing rods 3. Each fixing seat 7 has a sliding hole that matches the outer diameter of the fixing rod 3, allowing the fixing seat 7 to slide on the fixing rod 3 through the cooperation of the sliding hole. A single moving plate 8 is fixedly installed at the bottom of the two fixing seats 7, and the moving plate 8 is horizontally positioned.

[0040] In this embodiment, a first screw 4 rotatably passes between the two support plates 2, and the first screw 4 is parallel to the fixed rod 3. A first motor 5 is fixedly installed on one side of one of the support plates 2, and one end of the output shaft of the first motor 5 is fixedly connected to one end of the first screw 4. Two first drive blocks 6 are threadedly connected to the outer wall of the first screw 4, and both first drive blocks 6 are fixedly connected to the top of the corresponding fixed seat 7. When the first motor 5 is started, its output shaft drives the first screw 4 to rotate. Since the first drive blocks 6 are threadedly connected to the first screw 4 and fixed to the fixed seat 7, the rotation of the first screw 4 will drive the first drive blocks 6 to move axially along the first screw 4, thereby causing the fixed seat 7 to slide on the fixed rod 3, and finally realizing the horizontal movement of the moving plate 8.

[0041] In this embodiment, a plurality of welding heads 12 and corresponding material conveying pipes 13 are arranged below the movable plate 8. A corresponding mounting plate 11 is fixedly installed on the top of each welding head 12, and a plurality of guide rods 10 are fixedly installed on the top of each mounting plate 11. One end of each guide rod 10 slides through the movable plate 8. A cylinder 9 is provided on the top of each mounting plate 11, and each cylinder 9 is fixedly connected to the bottom of the movable plate 8. One end of the piston rod of each cylinder 9 is fixedly connected to the top of the corresponding mounting plate 11. When the cylinder 9 is activated, the extension and retraction of its piston rod will cause the mounting plate 11 to move axially along the guide rod 10, thereby realizing the lifting and lowering of the plurality of welding heads 12. A plurality of material conveying pipes 13 are fixedly installed on one side of adjacent welding heads 12 by corresponding brackets. The plurality of material conveying pipes 13 are inclined, and their outlets cooperate with the welding heating part of the welding head 12 to provide the required welding material to the welding head 12 during the welding process.

[0042] In this embodiment, a plurality of fixing plates 14 are fixedly installed on the top of the base plate 1. These fixing plates 14 are all located below the plurality of welding heads 12, and are parallel to each other and spaced apart. Two limiting brackets 15 are fixedly installed on the top of each fixing plate 14, with the two limiting brackets 15 located near both sides of the fixing plate 14. A plurality of clamping units 20 are slidably disposed on the top of their respective fixing plates 14, and the sides of their respective bases 21 are slidably engaged with the adjacent limiting brackets 15.

[0043] In this embodiment, the fixing assembly includes multiple clamping units 20 and corresponding second drive blocks 18 and multiple connecting blocks 19. Each clamping unit 20 includes a base 21. Two rotating rods 23 are rotatably mounted on the top of the base 21 via a bracket. The two rotating rods 23 are located near the sides of the base 21 and are parallel to each other. A gear 25 is fixedly mounted at one end of each rotating rod 23. A torsion spring 26 is sleeved on the outer wall of each rotating rod 23. One end of each torsion spring 26 is fixedly connected to one side of the adjacent gear 25 via a spring seat, and the other end of each torsion spring 26 is fixedly connected to one side of the adjacent bracket via a spring seat. A pressing frame 24 is fixedly mounted on the side of each rotating rod 23 that is close to each other. Under the action of the torsion spring 26, both pressing frames 24 are tightly pressed against the top of the base 21. When it is necessary to clamp the PCBA board, the PCBA board is placed on the base 21. The pressing frame 24, under the elastic force of the torsion spring 26, will tightly press the PCBA board, thereby fixing it.

[0044] In this embodiment, a groove 28 is provided on the side of the base 21 near the gear 25. Two levers 27 are slidably connected in the groove 28. A rack 29 is fixedly installed on the top of each lever 27, and the two racks 29 mesh with the adjacent gear 25. When the two levers 27 approach each other, they will drive the two racks 29 to move, thereby driving the two gears 25 to rotate. The rotation of the two gears 25 will drive the two rotating rods 23 to rotate, thereby lifting the two pressing brackets 24 so that the PCBA board can be placed on or removed from the base 21.

[0045] This application can be used in the field of electronic manufacturing technology, or in other fields applicable to this application.

[0046] In another embodiment: Reference Figure 3 , 4 5. A spot welding device for PCBA processing, which is applied to the field of electronic manufacturing technology;

[0047] In this embodiment, limit sliders 22 are fixedly installed on both sides of multiple bases 21. Multiple limit sliders 22 are slidably connected to the inner wall of adjacent limit brackets 15. Through the cooperation between the limit sliders 22 and the limit brackets 15, the clamping unit 20 can be stably slid on the fixed plate 14.

[0048] In this embodiment, both sides of the multiple connecting blocks 19 are fixedly connected to the base 21 of the adjacent clamping unit 20 to combine the multiple clamping units 20 into a whole. The second drive block 18 is installed in the same way as the multiple connecting blocks 19. It is disposed in the middle part of the multiple clamping units 20 and fixedly connected to two adjacent clamping units 20. The top of the base plate 1 is rotatably mounted with a second screw 16 via a bracket. A second motor 17 is provided at one end of the second screw 16. The second motor 17 is fixedly mounted on one side of the adjacent bracket, and one end of the output shaft of the second motor 17 is fixedly connected to one end of the second screw 16. The second screw 16 is threadedly connected to the second drive block 18. When the second motor 17 starts, its output shaft drives the second screw 16 to rotate. Since the second drive block 18 is threadedly connected to the second screw 16 and fixedly connected to multiple clamping units 20, the rotation of the second screw 16 will drive the second drive block 18 to move along the axial direction of the second screw 16, thereby driving the fixed assembly with multiple clamping units 20 to move synchronously horizontally, so as to adjust the position of the PCBA board according to actual needs.

[0049] However, as is well known to those skilled in the art, the working principles and wiring methods of the first motor 5, cylinder 9, welding head 12 and second motor 17 are commonplace and belong to conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0050] The working principle and usage process of this technical solution are as follows: During use, the operator can place the PCBA board to be processed on the base 21 of multiple clamping units 20. By pressing the levers 27 on both sides of the clamping unit, the levers 27 slide horizontally along the slide groove 28 and move closer to each other, which can drive the rack 29 to mesh and rotate with the gear 25. When the gear rotates, it drives the rotating rod 23 to rotate outward against the force of the torsion spring 26, which can lift the pressing frame 24. At this time, the PCBA board can be placed on the top of the base 21. After releasing the levers, the torsion spring 26 automatically resets and drives the rotating rod 23 to rotate back, so that the pressing frame 24 presses the edge of the PCBA board to complete the fixation.

[0051] When the equipment is working, the second motor 17 can drive the second screw 16 to rotate, which in turn drives the second drive block 18, which is threaded to it, to move horizontally. Since the second drive block 18 is linked to all clamping units 20 through the connecting block 19, the entire fixing assembly moves synchronously along the limiting bracket 15, which allows the PCBA board to move directly below the welding head 12.

[0052] During operation, the first motor 5 drives the first screw 4 to rotate, causing the two first drive blocks 6 to move horizontally along the fixed rod 3. The first drive blocks 6, via the fixed seat 7, adjust the position of the moving plate 8 laterally, aligning the welding head 12 with the soldering point on the PCBA board. Subsequently, multiple cylinders 9 operate synchronously, pushing the mounting plate 11 vertically downward along the guide rod 10, causing the welding head 12 to contact the solder point. The feed pipe 13 delivers solder to the heating part of the welding head 12, completing the spot welding process. After one welding operation, the cylinders 9 quickly lift the welding head 12 to reset.

[0053] Following the pre-set working logic, under the corresponding drives of the first motor 5 and the second motor 17, the welding head 12 and the PCBA board can be adjusted simultaneously. Then, the welding head 12 can be dropped and spot-welded again according to the above steps. In this way, continuous spot welding processing on the PCBA board can be completed.

[0054] After the welding work is completed, the operator can press and push the two levers 27 again to release the pressing bracket 24 and then take out the processed PCBA board.

[0055] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A spot welding device for PCBA processing, characterized in that, include: A base plate (1) has two support plates (2) fixedly installed on its top. Two fixing rods (3) are fixedly installed between the two support plates (2). Two fixing seats (7) are slidably connected to the outer walls of the two fixing rods (3). The same moving plate (8) is fixedly installed at the bottom of the two fixing seats (7). Multiple welding heads (12) and a material conveying pipe (13) that cooperates with the moving plate (8) are provided below the moving plate (8) for spot welding PCBA boards. And multiple fixing plates (14), all of which are fixedly installed on the top of the base plate (1) and located below the multiple welding heads (12); It also includes a fixing component, which includes multiple clamping units (20), a second drive block (18), and multiple connecting blocks (19). Both sides of the second drive block (18) and the multiple connecting blocks (19) are fixedly connected to the adjacent clamping units (20) to combine the multiple clamping units (20) into a whole. The multiple clamping units (20) are used to clamp PCBA boards. During operation, the PCBA board is fixed on the clamping unit (20), the second driving block (18) drives the fixing component to move, so that the PCBA board is located below the welding head (12), the moving plate (8) drives the welding head (12) to move to align with the solder joint, and the welding head (12) descends to perform spot welding.

2. The spot welding device according to claim 1, characterized in that, The two support plates (2) are rotatably connected by the same first screw (4). A first motor (5) is fixedly installed on one side of one of the support plates (2). The output shaft of the first motor (5) is fixedly connected to one end of the first screw (4). Two first drive blocks (6) are threadedly connected to the outer wall of the first screw (4). Both first drive blocks (6) are fixedly connected to the top of the corresponding fixed seat (7).

3. The spot welding device according to claim 1, characterized in that, Each of the welding heads (12) has a corresponding mounting plate (11) fixedly installed on its top. Each of the mounting plates (11) has a number of guide rods (10) fixedly installed on its top. One end of each of the guide rods (10) slides through the moving plate (8). Each of the mounting plates (11) has a cylinder (9) fixedly installed on its top. Each of the cylinders (9) is fixedly connected to the bottom of the moving plate (8). The piston rod of each of the cylinders (9) is fixedly connected to the top of the corresponding mounting plate (11) to realize the lifting and lowering of the welding heads (12). Each of the material conveying pipes (13) is fixedly installed on one side of the adjacent welding head (12) and is inclined. Its outlet is matched with the welding heating part of the welding head (12).

4. The spot welding device according to claim 1, characterized in that, The clamping unit (20) includes a base (21). Two rotating rods (23) are rotatably mounted on the top of the base (21) via a bracket. A gear (25) is fixedly mounted on one end of each of the two rotating rods (23). A torsion spring (26) is sleeved on the outer wall of each of the two rotating rods (23). One end of each torsion spring (26) is fixedly connected to an adjacent gear (25), and the other end is fixedly connected to an adjacent bracket. A pressing frame (24) is fixedly mounted on the side of each of the two rotating rods (23) that is close to each other. The two pressing frames (24) are pressed tightly against the top of the base (21) under the action of the torsion spring (26).

5. The spot welding device according to claim 4, characterized in that, A groove (28) is provided on one side of the base (21), and two levers (27) are slidably connected in the groove (28). A rack (29) is fixedly installed on the top of each of the two levers (27), and the two racks (29) mesh with adjacent gears (25). During operation, when the levers (27) approach each other, they drive the gears (25) to rotate, thereby lifting the pressing frame (24).

6. The spot welding device according to claim 1, characterized in that, Two limiting brackets (15) are fixedly installed on the top of each of the multiple fixed plates (14). Multiple clamping units (20) are slidably disposed on the top of the corresponding fixed plates (14). The two sides of the base (21) are slidably engaged with the adjacent limiting brackets (15). Limiting sliders (22) are fixedly installed on both sides of the multiple bases (21). The multiple limiting sliders (22) are slidably connected to the inner wall of the adjacent limiting brackets (15).

7. The spot welding device according to claim 1, characterized in that, The top of the base plate (1) is rotatably mounted with a second screw (16) via a bracket. A second motor (17) is provided at one end of the second screw (16). The second motor (17) is fixedly mounted on one side of the adjacent bracket, and its output shaft is fixedly connected to one end of the second screw (16). The second screw (16) is threadedly connected to the second drive block (18).

8. The spot welding apparatus according to any one of claims 2-7, characterized in that, The fixing component drives multiple clamping units (20) to move synchronously through the movement of the second drive block (18).

9. The spot welding apparatus according to any one of claims 1-3, characterized in that, in, During spot welding, the welding head (12) descends to contact the welding point, the feed pipe (13) delivers the welding material, and the welding head (12) is reset after the spot welding is completed.

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