A plate conveying device for a spot welder

Abstract

This utility model belongs to the technical field of conveying devices, specifically a plate conveying device for a spot welding machine. It includes a conveyor frame with a conveyor belt inside. Three sets of L-shaped vibrating blocks are fixedly installed on both sides of the concave surface of the conveyor frame. A vibrator is connected between the inner side of the L-shaped surface of each vibrating block and the inner wall of the conveyor frame. An elastic connecting block is fixedly installed on the side of each vibrating block away from the conveyor frame, and a roller frame is fixedly installed on the side of the elastic connecting block away from the vibrating block. Multiple rollers are rotatably installed inside each of the three sets of roller frames. A dust extraction hood is fixedly installed on the upper surface of the conveyor frame. A machine base is installed on one side of the conveyor frame. A spot welding shaft is installed on the lower surface inside the machine base, and a spot welding gun is fixedly installed on the lower surface of the spot welding shaft. This utility model solves the problems of cleaning and guiding the metal plate before spot welding in the prior art through the structure of rollers, dust extraction hood, and protective cover. It also prevents spot welding residue from splashing during the spot welding process, protecting the safety of workers.

Description

Technical Field

[0001] This utility model belongs to the technical field of conveying devices, and particularly relates to a sheet metal conveying device for a spot welding machine. Background Technology

[0002] Spot welding is a traditional resistance welding process that uses a large current to generate heat through the contact resistance of the workpiece and form a weld nugget under electrode pressure to achieve metal connection. The focus of development is on intelligentization and quality control, such as using servo motors to achieve precise pressure and displacement monitoring, and using digital control systems to achieve constant current regulation and real-time analysis of weld quality, in order to meet the automated production needs of new materials such as high-strength steel and aluminum alloys.

[0003] Patent application CN201821653411.0 discloses a material conveying device for a spot welding machine, including a worktable. Main support legs are welded to the outer walls of the four corners of the worktable's bottom. Support feet are welded to the outer walls of the bottom ends of the main support legs. Fixed bearings are welded to the outer walls of the two main support legs on opposite sides, and rotating shafts are inserted into the inner walls of the fixed bearings. A foot pedal is bolted to the outer wall of the top of the rotating shaft. A crankshaft is welded to the outer wall of the rotating shaft near the foot pedal. A push rod is movably connected to the outer wall of the crankshaft at the end away from the rotating shaft. This invention allows the operator to simply place the workpiece on a conveyor belt, which then transports the workpiece to a designated position. The workpiece and the conveyor belt remain relatively stationary, enabling high-precision spot welding of the workpiece. The entire spot welding process can be continuous, thereby improving the efficiency of spot welding.

[0004] Existing technologies use structures such as conveyor belts, baffles, and foot pedals to allow workers to automatically transport workpieces simply by placing them on the conveyor belt, and can control the position of the spot welding head. However, there are still many shortcomings in overall use.

[0005] First, if there is dust or dirt on the surface of the weldment during spot welding, it will affect the quality of the finished product. Existing spot welding conveying devices usually need to clean the surface of the plate separately before conveying to ensure that the surface of the weldment is clean and tidy during spot welding. They do not have the function of automatically cleaning the surface of the plate.

[0006] Secondly, during the process of conveying spot welded parts, workers usually just place the plates on the conveyor belt, resulting in different positions of the plates arriving at the spot welding position. Workers need to manually adjust the position of the plates or the spot welding gun, which affects work efficiency.

[0007] Finally, during the spot welding process, a large amount of dust and residue will be generated and splashed. If this dust and residue fall back onto the surface of the board, it will affect the quality of the finished board. If there are workers in the surrounding environment, it will also cause injury to the workers. Utility Model Content

[0008] To overcome the shortcomings of existing technologies, this utility model provides a sheet metal conveying device for spot welding machines. This application solves the cleaning problem of metal sheets used for spot welding in existing technologies by incorporating a vibrator, rollers, a dust extraction hood, and a protective cover. By adding additional mechanisms to the conveying mechanism, it cleans the metal sheets before and after spot welding while guiding them during transport. This ensures the sheets arrive at the spot welding position clean and precisely, preventing welding residue from splashing and re-adhering to the sheet surface during welding, effectively protecting the safety of workers.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a plate conveying device for a spot welding machine, comprising a conveyor frame, a conveyor belt internally mounted on the conveyor frame, three sets of L-shaped vibrating blocks fixedly mounted on both sides of the concave surface of the conveyor frame, a vibrator connected between the inner side of the L-shaped surface of the vibrating blocks and the inner wall of the conveyor frame, an elastic connecting block fixedly mounted on the side of the vibrating blocks away from the conveyor frame, a roller frame fixedly mounted on the side of the elastic connecting block away from the vibrating blocks, multiple rollers rotatably mounted inside each of the three sets of roller frames, a dust suction cover fixedly mounted on one side of each set of roller frames on the upper end surface of the conveyor frame, a machine base body mounted on one side of the conveyor frame, a spot welding shaft mounted on the lower end surface inside the machine base body, and a spot welding gun fixedly mounted on the lower end surface of the spot welding shaft.

[0010] Preferably, the outer surfaces of the rollers in the first group of roller frames are provided with multiple first striking rods, the outer surfaces of the rollers in the second group of roller frames are provided with multiple second striking rods, and the outer surfaces of the rollers in the third group of roller frames are left untreated.

[0011] Preferably, a second air intake is provided on the side of the dust hood near its roller frame, and a second vacuum cleaner is fixedly provided on the upper surface of the dust hood.

[0012] Preferably, a second air intake is provided on the guide slope of the dust hood near the corresponding roller frame, and an arc-shaped guide plate is provided on the side of the dust hood away from the second air intake. Multiple brush plate connecting rods are fixedly connected to the side of the arc-shaped guide plate near the second air intake, and a first brush plate is fixedly connected to the other end of the brush plate connecting rod. A scraper is provided at the outwardly curved tail end of the arc-shaped guide plate.

[0013] Preferably, a protective cover is fixedly installed on the lower end face inside the main body of the machine tool, and a plurality of connecting rods are fixedly installed on the lower end face of the spot welding shaft. A protective cover opening is fixedly installed at the other end of the connecting rod, and a dust removal groove is connected between the protective cover opening and the protective cover.

[0014] Preferably, a first pusher cylinder is fixedly installed on the outside of the conveyor frame below the spot welding gun, a second pusher cylinder is fixedly installed at the output end of the first pusher cylinder, and a clamping plate is fixedly installed at the output end of the second pusher cylinder.

[0015] Preferably, sensors are fixedly installed on both sides of the inside of the conveyor frame below the spot welding gun.

[0016] Preferably, the conveyor frame is fixedly provided with a roller support plate inside the conveyor belt. Three sets of third push cylinders are fixedly provided on the upper surface of the roller support plate. Each set of third push cylinders is located below each dust collection hood. A roller connecting rod is fixedly provided between the output ends of each set of third push cylinders. A roller is rotatably provided on the outside of the roller connecting rod.

[0017] Preferably, a second brush plate is fixedly installed at one end of the conveyor frame, and the second brush plate abuts against the conveyor belt.

[0018] In summary, compared with existing technologies, the beneficial effects of this solution are as follows: (1) This utility model is designed with a structure including a vibrator, a vibrating block, a roller, and a second vacuum cleaner. Multiple sets of vibrators continuously strike the corresponding vibrating blocks, thereby driving the striking rods on each set of rollers to continuously strike the metal plate, shaking off the dust and dirt on the surface of the metal plate. Then, the second vacuum cleaner sucks away the shaken-off dust and dirt, making the surface of the metal plate clean and tidy before spot welding, thereby improving the quality of spot welding.

[0019] (2) This utility model uses a roller frame and rollers to set up a structure so that before the metal sheet reaches the spot welding position, multiple sets of rollers on the L-shaped roller frame that are inclined from both sides toward the middle of the conveyor belt will guide the metal sheet that is randomly placed on the conveyor belt to the center, so that the workers do not have to adjust the position twice, thus increasing the overall work efficiency.

[0020] (3) The present invention, through the structure of protective cover, dust removal tank and first vacuum cleaner, can suck the dust and residue that splashed during spot welding into the protective cover. Larger splashes will fall into the dust removal tank and will not re-adhere to the surface of the metal plate, thus improving the quality of spot welding and protecting the safety of workers. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present utility model.

[0022] Figure 2 This is a top view of the present invention.

[0023] Figure 3 This is the front view of the present invention.

[0024] Figure 4 This is a side view of the present invention.

[0025] Figure 5 for Figure 2 Sectional view along the AA direction.

[0026] Figure 6 for Figure 3 Sectional view along the BB direction.

[0027] Figure 7 for Figure 4 Sectional view along the CC direction.

[0028] Figure 8 for Figure 5 Enlarged view of a section at point D.

[0029] Figure 9 for Figure 5 Enlarged view of a section at point E in the middle.

[0030] Figure 10 for Figure 6 Enlarged view of a section at point F.

[0031] Figure 11 for Figure 7 Enlarged view of a section at point G.

[0032] In the diagram: machine body 10, conveyor frame 11, roller 12, reducer 13, motor 14, roller support plate 15, first push cylinder 16, second push cylinder 17, sensor 18, spot welding shaft 19, spot welding gun 20, protective cover 21, protective cover opening 22, connecting rod 23, dust removal trough 24, first air extraction port 25, first vacuum cleaner 26, vibrator 27, vibrating block 28, elastic connecting block 29, roller frame 30, roller 31, first striking rod 32, second striking rod 33, dust suction hood 34, second air extraction port 35, second vacuum cleaner 36, scraper 37, brush plate connecting rod 38, first brush plate 39, third push cylinder 40, roller connecting rod 41, roller 42, second brush plate 43, conveyor belt 44, clamping plate 45, curved guide plate 46. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, 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.

[0034] Reference Appendix Figure 1 Appendix Figure 2 Appendix Figure 4 Appendix Figure 5 and attached Figure 10A plate conveying device for a spot welding machine includes a machine base body 10. A spot welding shaft 19 is provided on the lower end face of the machine base body 10, and a spot welding gun 20 is fixedly provided on the lower end face of the spot welding shaft 19. It should be noted that the spot welding shaft 19 and the spot welding gun 20 can be spot welding devices that can move in multiple directions to meet the welding processing of different parts. This is prior art and will not be elaborated on in this application. A concave conveyor frame 11 is provided below the spot welding shaft 19. Rollers 12 are rotatably provided at both ends of the conveyor frame 11 within its concave surface. A conveyor belt 44 is drivenly connected to the outer side of the two rollers 12. A fixing plate is fixedly provided on the outer side of the end of the conveyor frame 11 away from the machine base body 10, and a motor 14 is fixedly provided on the upper end face of the fixing plate. The output end of the motor 14 is rotatably connected to the reducer 13. The output end of the reducer 13 is fixedly connected to one end of one of the rollers 12. Two fixed plates are fixedly installed on the outer side of the conveyor frame 11 below the spot welding shaft 19. A first push cylinder 16 is fixedly installed on the upper surface of the fixed plate. Another fixed plate is fixedly installed on the output end of the first push cylinder 16. A second push cylinder 17 is fixedly installed on the upper surface of this fixed plate. A clamping plate 45 is fixedly installed on the output end of the second push cylinder 17. The end of the clamping plate 45 away from the second push cylinder 17 is treated with anti-slip treatment. Multiple sensors 18 are fixedly installed on both sides of the concave surface of the conveyor frame 11 near the clamping plate 45. The sensors 18 can be conventional infrared sensors, with the purpose of determining whether the metal plate has moved into place.

[0035] Specifically, when spot welding metal sheets is required, motor 14 can be started first. The output of motor 14 drives the output of reducer 13 to rotate. After the reducer 13 reaches a certain output speed, it transmits power to roller 12, which in turn drives conveyor belt 44. At this time, the metal sheet is placed on the upper surface of conveyor belt 44, and conveyor belt 44 will move the metal sheet towards the main body 10 of the machine. At this time, sensor 18 will detect the position of the metal sheet. When the metal sheet moves below the spot welding shaft 19, the equipment will start the second push cylinder 17. The output ends of the two second push cylinders 17 push the clamping plates 45 outward, and the two clamping plates 45 slide relative to each other to clamp the metal plate. Then the first push cylinder 16 is activated. At this time, the first push cylinder 16 will lift the second push cylinder 17 and the metal plate, so that the metal plate is away from the surface of the conveyor belt 44 and gradually approaches the spot welding shaft 19. Then the spot welding gun 20 will perform spot welding. After the spot welding is completed, the first push cylinder 16 and the second push cylinder 17 will retract in sequence to put the spot-welded metal plate back onto the conveyor belt 44, so that the metal plate continues to move.

[0036] Further, see attached document. Figure 2 Appendix Figure 5 Appendix Figure 8 and attached Figure 9Three sets of L-shaped vibrating blocks 28 are fixedly installed on both sides of the concave surface of the conveyor frame 11 above the conveyor belt 44. An elastic connecting block 29 made of elastic material is fixedly installed at the other end of each vibrating block 28. A vibrator 27 is fixedly installed between the elastic connecting block 29 and the inner wall of the conveyor frame 11. A ring-shaped roller frame 30 is fixedly installed on the side of the elastic connecting block 29 away from the vibrating block 28. Two opposing roller frames 30 form a group, for a total of three groups. Between the two roller frames 30 in each group, a funnel-shaped guide slope is formed, which can... When the material moves to one side, a certain centering adjustment is performed. Multiple rollers 31 are rotatably arranged inside each roller frame 30. The rollers 31 are made of elastic material. Multiple first striking rods 32 are fixedly arranged on the surface of the rollers 31 on the first set of roller frames 30 near the reducer 13. Multiple second striking rods 33 are fixedly arranged on the surface of the rollers 31 on the second set of roller frames 30. The diameter of the second striking rods 33 is smaller than that of the first striking rods 32. The surface of the rollers 31 on the third set of roller frames 30 near the clamping plate 45 is not treated.

[0037] Specifically, when the metal sheet is placed on the upper surface of the conveyor belt 44, it will pass through multiple sets of roller frames 30 in sequence during transportation, and come into contact with the outer surfaces of multiple rollers 31. At this time, the vibrator 27 on the outer side of each set of roller frames 30 will start working, and the output end of the vibrator 27 will continuously strike the vibrating block 28, causing the vibrating block 28 to vibrate. Since the elastic connecting block 29 is made of elastic material, it will cause the roller frame 30 to swing under the vibration of the vibrating block 28. At this time, the first striking rod 32 on the surface of the roller 31 on the first set of roller frames 30 will continuously strike the metal sheet. Since the first striking rod 32 is slightly larger, the impact and resistance friction experienced by the metal sheet when it moves through will be relatively large. The larger rollers allow for the shaking off of heavier and larger contaminants. The metal sheet then passes through the second set of rollers 31 for the same treatment. At this time, the second striking bar 33 on the surface of roller 31 is slightly smaller than the first striking bar 32, so the striking force received will be smaller, but the overall vibration amplitude will be more concentrated, which can knock off small contaminants and further shake off any remaining contaminants. Then, when passing through the third set of rollers 31, since the outer surface of the third set of rollers 31 is not equipped with striking bars and the rollers 31 are made of elastic material, although some vibration will occur, the metal sheet will not shake too much. At this time, the main purpose of the roller frame 30 is to center the sheet through slight vibration, so that the sheet can move smoothly under the spot welding shaft to complete the spot welding process.

[0038] Furthermore, see the attached document. Figure 1 Appendix Figure 3 Appendix Figure 5 Appendix Figure 9Three dust collection hoods 34 are fixedly installed on the upper surface of the conveyor frame 11. Each dust collection hood 34 is located on one side of each set of roller frames 30. A guide slope is provided on the side of the dust collection hood 34 near the corresponding roller frame 30. Multiple second air extraction ports 35 are provided on this guide slope. A second vacuum cleaner 36 is fixedly installed on the upper surface of the dust collection hood 34. A hose is connected between the second vacuum cleaner 36 and the second air extraction port 35. An arc-shaped guide plate 46 is provided on the side of the dust collection hood 34 away from the second air extraction port 35. The arc-shaped guide plate 46 is bent and deformed outward in the direction away from the second air extraction port 35. Multiple brush plate connecting rods 38 are fixedly installed on the side of the arc-shaped guide plate 46 near the second air extraction port 35. A first brush plate 39 is fixedly connected to one end of the other end of the brush plate connecting rod 38. A scraper 37 is provided at the outwardly curved tail end of the arc-shaped guide plate 46.

[0039] Specifically, after the dirt and dust on the surface of the metal sheet are shaken off by multiple roller frames 30, the metal sheet and conveyor belt 44 will continue to move, so they will move to the bottom of each dust collection hood 34. At this time, the dirt and dust on the metal sheet will be scraped off by the first brush plate 39 and fall down. At this time, the second vacuum cleaner 36 will start to work, so that the dust and dirt can be sucked out of the mechanism through the second air intake 35. During this process, the outward-curving arc-shaped guide plate 46 increases the coverage area of ​​a single dust hood 34, significantly increasing its suction range and time, thus improving suction efficiency. Furthermore, the arc-shaped guide plate 46 forms a flared, angled surface with the metal sheet, increasing the suction range while reducing workload and preventing excessive dispersion of suction pressure, thereby enhancing suction effectiveness. Additionally, the scraper 37 at the other end of the arc-shaped guide plate 46 further removes surface dirt and dust, ensuring the cleanliness of the sheet metal being spot-welded.

[0040] Further, see attached document. Figure 4 Appendix Figure 5 Appendix Figure 6 and attached Figure 10A protective cover 21 is fixedly connected to the lower end face of the top of the machine body 10. The protective cover 21 surrounds the spot welding shaft 19. Multiple connecting rods 23 are fixedly installed on the outside of the spot welding shaft 19. A protective cover opening 22 is fixedly installed at the end of the connecting rod 23 away from the spot welding shaft 19. The protective cover opening 22 surrounds the spot welding gun 20 and its bottom is slightly higher than the spot welding gun 20. A detachable dust removal groove 24 is connected between the protective cover 21 and the protective cover opening 22. A fixing plate is fixedly installed in the concave surface of the machine body 10. A first vacuum cleaner 26 is fixedly installed on the upper end face of the fixing plate. A first air extraction port 25 is provided on the side of the protective cover 21 near the first vacuum cleaner 26. A hose is connected between the first air extraction port 25 and the first vacuum cleaner 26. The protective cover 21, the protective cover opening 22 and the dust removal groove 24 are all made of a non-adhesive material.

[0041] Specifically, when the metal sheet is clamped by the clamping plate 45 for spot welding, a large amount of dust and metal residue will be generated. At this time, the first vacuum cleaner 26 is started. The first vacuum cleaner 26 will suck the dust and residue generated by the spot welding gun 20 into the protective cover 21 through the hose and the first air extraction port 25. At this time, small dust particles and gas will be absorbed into the first vacuum cleaner 26. However, if large dust particles and dirt are sucked into the protective cover 21 but the suction is insufficient, they will slide down the curved surface of the protective cover 21 into the detachable dust collection tank 24, which can be replaced and cleaned by the staff regularly.

[0042] Furthermore, a roller support plate 15 is fixedly installed between the two sides of the concave surface of the conveyor frame 11. The roller support plate 15 is located inside the conveyor belt 44. Three sets of third push cylinders 40 are fixedly installed on the upper surface of the roller support plate 15. Each set of third push cylinders 40 is in pairs and is located below each dust collection hood 34. A roller connecting rod 41 is fixedly installed between the output ends of two sets of third push cylinders 40. A roller 42 is rotatably installed on the outside of the roller connecting rod 41.

[0043] Specifically, when cleaning or vacuuming the metal sheet, the third push cylinder 40 can be activated. The output end of the third push cylinder 40 can drive the roller 42 to push upward. At this time, the roller 42 will come into contact with the conveyor belt 44 and push the conveyor belt 44 slightly towards the dust collection hood 34 to form a convex surface. When the metal sheet passes through this convex surface, the entire sheet will tilt up and fall, making it easier for the metal sheet to come into contact with the first brush plate 39, thereby brushing off and sucking out the dust on the surface of the sheet, and also tensioning the conveyor belt 44.

[0044] Furthermore, refer to Figure 5 and Figure 7 A second brush plate 43 is fixedly installed inside one end of the conveyor frame 11, and the brush head of the second brush plate 43 slightly touches the outer surface of the conveyor belt 44.

[0045] Specifically, after spot welding is completed, there will be some dust and residue on the surface of the conveyor belt 44. As the conveyor belt 44 rotates between the two rollers 12, the outer surface of the conveyor belt 44 will come into contact with the brush head of the second brush plate 43, thereby brushing off the dust and residue on the outer surface of the conveyor belt 44.

[0046] Finally, it should be noted that the connection and fixing of each part of the plate conveying device for spot welding machine of this utility model can be achieved by conventional mechanical connection structure. The control system and connection method required between multiple electrical components and driving components can also be achieved by conventional means and can be equipped with corresponding sensors and detectors. The synchronous drive of multiple push cylinders can also be controlled by synchronous circuit or synchronous controller. As long as the beneficial effect or the specific actions during the above work can be achieved, it can be implemented.

[0047] The reducer 13, motor 14, first push cylinder 16, second push cylinder 17, first vacuum cleaner 26 and second vacuum cleaner 36 of the plate conveying device for spot welding machine in this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to make any creative efforts.

[0048] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0049] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0050] The foregoing description presents and describes several preferred embodiments of this application. However, as mentioned above, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A plate conveying device for spot welders, comprising a conveyor frame (11), characterized in that, The conveyor frame (11) is equipped with a conveyor belt (44) for transmission. Three sets of L-shaped vibrating blocks (28) are fixedly arranged on both sides of the concave surface of the conveyor frame (11). A vibrator (27) is connected between the inner side of the L-shaped surface of the vibrating block (28) and the inner wall of the conveyor frame (11). An elastic connecting block (29) is fixedly arranged on the side of the vibrating block (28) away from the conveyor frame (11). A roller frame (30) is fixedly arranged on the side of the elastic connecting block (29) away from the vibrating block (28). Multiple rollers (31) are rotatably arranged inside the three sets of roller frames (30). A dust suction hood (34) is fixedly arranged on one side of each set of roller frames (30) on the upper end surface of the conveyor frame (11). A machine table body (10) is arranged on one side of the conveyor frame (11). A spot welding shaft (19) is arranged on the lower end surface inside the machine table body (10). A spot welding gun (20) is fixedly arranged on the lower end surface of the spot welding shaft (19).

2. The plate conveying device for a spot welder according to claim 1, wherein The outer surfaces of the multiple rollers (31) in the first group of roller frames (30) are provided with multiple first striking rods (32), the outer surfaces of the multiple rollers (31) in the second group of roller frames (30) are provided with multiple second striking rods (33), and the outer surfaces of the multiple rollers (31) in the third group of roller frames (30) are not treated.

3. The plate conveying device for a spot welder according to claim 1, wherein The dust hood (34) has a second air intake (35) on the side near its roller frame (30), and a second vacuum cleaner (36) is fixedly installed on the upper surface of the dust hood (34).

4. The plate conveying device for a spot welder according to claim 3, wherein The dust hood (34) is provided with an arc-shaped guide plate (46) on the side away from the second air intake (35). Multiple brush plate connecting rods (38) are fixedly connected to the side of the arc-shaped guide plate (46) near the second air intake (35). A first brush plate (39) is fixedly connected to the other end of the brush plate connecting rod (38). A scraper (37) is provided at the outwardly curved tail end of the arc-shaped guide plate (46).

5. The plate conveying device for a spot welder according to claim 1, wherein A protective cover (21) is fixedly installed on the lower end face of the machine body (10), and a plurality of connecting rods (23) are fixedly installed on the lower end face of the spot welding shaft (19). A protective cover opening (22) is fixedly installed on the other end of the connecting rod (23), and a dust removal groove (24) is connected between the protective cover opening (22) and the protective cover (21).

6. The plate conveying device for a spot welder according to claim 1, wherein A first pusher cylinder (16) is fixedly installed on the outside of the conveyor frame (11) below the spot welding gun (20). A second pusher cylinder (17) is fixedly installed at the output end of the first pusher cylinder (16). A clamping plate (45) is fixedly installed at the output end of the second pusher cylinder (17).

7. A plate conveying device for a spot welding machine according to claim 1, characterized in that, Sensors (18) are fixedly installed on both sides inside the conveyor frame (11) below the spot welding gun (20).

8. A plate conveying device for a spot welding machine according to claim 1, characterized in that, The conveyor frame (11) has a roller support plate (15) fixedly installed inside the conveyor belt (44). Three sets of third push cylinders (40) are fixedly installed on the upper surface of the roller support plate (15). Each set of third push cylinders (40) is located below each dust hood (34). A roller connecting rod (41) is fixedly installed between the output ends of each set of third push cylinders (40). A roller (42) is rotatably installed on the outside of the roller connecting rod (41).

9. The plate conveying device for a spot welder according to claim 1, wherein A second brush plate (43) is fixedly installed at one end of the conveyor frame (11), and the second brush plate (43) abuts against the conveyor belt (44).

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