Rail transit vehicle connecting plate accessory welding device

Abstract

The application relates to the field of rail transit accessory machining technology, in particular to a rail transit vehicle connecting plate accessory welding device, which comprises a welding platform main body and an automatic electric arc welding machine main body. A wire feeder is fixedly installed on the outer wall of the automatic electric arc welding machine main body. An output end of the wire feeder is fixedly connected with a wire outlet pipe. An end of the wire outlet pipe is fixedly connected with a spiral steel spring pipe. The outer wall of the spiral steel spring pipe is sleeved with a plastic hose. One end of the plastic hose is fixedly connected with a wire guide head. When single first contact balls are separated from single contact blocks, the reset spring is reset to move upwards with the fixed sheet and the first contact guide rod. When the first contact guide rod moves upwards, the knocking plate and the knocking protrusion are synchronously moved upwards, so that the knocking protrusion moves upwards to knock the end of the wire guide head. The knocking makes the blockage in the inner wall of the wire guide head further fall off.

Description

Technical Field

[0001] This invention relates to the field of rail transit component processing technology, specifically to a welding device for rail transit vehicle connecting plate components. Background Technology

[0002] The rail transit vehicle connecting plate accessory welding device is an automatic arc welding equipment designed specifically for various connecting plates, connecting seats and other structural components in rail transit vehicles (such as high-speed rail, subway, EMU, etc.). It is mainly used to achieve efficient and high-precision welding between connecting plates and components such as car body and bogie, ensuring the strength, stability and safety of vehicle structure.

[0003] In existing welding devices for rail transit vehicle connecting plate components, the welding wire tip is prone to defects such as burrs and bends during the welding process. In addition, welding spatter tends to adhere to the inner wall of the guide nozzle, causing the welding wire to be stuck or blocked when it reaches the end guide nozzle position, making it difficult to feed smoothly. This leads to wire jamming and wire breakage, affecting the continuity and quality of welding. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for rail transit vehicle connecting plate accessories, so as to solve the problem mentioned in the background art that welding spatter easily adheres to the inner wall of the guide nozzle, causing the welding wire to easily get stuck and blocked when it is delivered to the end guide nozzle position, and thus cannot be delivered smoothly.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for rail transit vehicle connecting plate accessories, comprising a welding platform body and an automatic arc welding machine body. A wire feeder is fixedly installed on the outer wall of the automatic arc welding machine body. A wire outlet tube is fixedly connected to the output end of the wire feeder. A spiral steel wire spring tube is fixedly connected to the end of the wire outlet tube. A plastic hose is sleeved on the outer wall of the spiral steel wire spring tube. A wire guide head is fixedly connected to one end of the plastic hose. A second fixing seat is fixedly connected to the outer wall of the wire guide head. A fixing frame is fixedly connected to the outer wall of the second fixing seat. A second micro servo motor is fixedly installed on the outer wall of the fixing frame. A third transmission gear is fixedly connected to the output end of the second micro servo motor. A transmission gear ring is meshed with the outer wall of the third transmission gear. The transmission gear ring is rotatably connected to the inner wall of the fixing frame. A cleaning mechanism for cleaning the wire guide head and the spiral steel wire spring tube is slidably installed on the inner wall of the transmission gear ring.

[0006] Preferably, the cleaning mechanism includes a first abutment guide rod, a plurality of first abutment guide rods are slidably embedded in the inner wall of the transmission gear ring, a fixing plate is fixedly connected to the outer wall of the first abutment guide rod, and a return spring is sleeved on the first abutment guide rod. One end of the return spring is fixedly connected to the outer wall of the fixing plate, and the other end of the return spring is fixedly connected to the outer wall of the transmission gear ring.

[0007] Preferably, a first abutting ball is rotatably mounted on one end of the first abutting guide rod, and a plurality of annularly distributed abutting blocks are fixedly connected to the inner wall of the fixed frame, wherein the abutting blocks are configured as hemispherical blocks.

[0008] Preferably, a striking plate is fixedly connected to the other end of the first abutting guide rod, and a striking protrusion for striking the guide wire head is fixedly connected to the outer wall of the striking plate. A cleaning brush for cleaning the inner wall of the guide wire head is fixedly connected to the outer wall of the striking plate. An annular groove is provided on the guide wire head, and the first abutting guide rod passes through the annular groove.

[0009] Preferably, a second abutment guide rod is fixedly connected to the outer wall of the plastic hose, and a second abutment ball is rotatably installed at one end of the second abutment guide rod, and the movement trajectory of the first abutment guide rod abuts against the second abutment ball.

[0010] Preferably, a fixing plate is fixedly connected to the outer wall of the fixing frame, a first micro servo motor is fixedly installed on the outer wall of the fixing plate, a first transmission gear is fixedly connected to the output end of the first micro servo motor, a second transmission gear is rotatably connected to the outer wall of the fixing plate, the first transmission gear and the second transmission gear mesh with each other, a rotating rod is fixedly connected to the outer wall of both the first transmission gear and the second transmission gear, and a plurality of friction sleeves are fixedly sleeved on the outer wall of the rotating rod, the friction sleeves being rubber sleeves.

[0011] Preferably, both the plastic hose and the spiral steel wire spring tube are provided with through grooves, and the rotating rod is inserted into the through grooves.

[0012] Preferably, a first fixed seat is fixedly connected to the outer wall of the main body of the automatic arc welding machine, the plastic hose passes through the first fixed seat, two fixing bolts for limiting the position of the plastic hose are threaded on the first fixed seat, a status display screen is fixedly installed on the wire feeder, and a wire inlet tube is fixedly connected to the input end of the main body of the automatic arc welding machine.

[0013] Preferably, a placement platform is fixedly connected to the main body of the welding platform, a first electric slide rail is fixedly installed on the placement platform, a first guide rod is fixedly connected to the first electric slide rail, and a first sliding seat is fixedly connected to the moving end of the first electric slide rail.

[0014] Preferably, a second electric slide rail is fixedly installed on the outer wall of the first sliding seat, a second guide rod is fixedly connected to the second electric slide rail, a second sliding seat is fixedly installed at the moving end of the second electric slide rail, an electric telescopic rod is fixedly installed on the second sliding seat, a third guide rod is fixedly connected to the second sliding seat, a lifting seat is fixedly connected to the output end of the electric telescopic rod, and the main body of the automatic arc welding machine is fixedly installed on the lifting seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, when a single first abutting ball releases its contact with a single abutting block, the reset spring resets and moves the fixing plate and the first abutting guide rod upward. When the first abutting guide rod moves upward, it moves the striking plate and the striking protrusion upward synchronously, causing the striking protrusion to move upward and strike the end of the guide wire head. The striking causes the blockage on the inner wall of the guide wire head to be further dislodged.

[0016] 2. In this invention, the first abutting ball will intermittently abut against the abutting block. When abutting, the first abutting ball moves down with the first abutting guide rod. The first abutting guide rod moves down with the fixing plate to compress the reset spring. The downward movement of the first abutting guide rod moves the striking plate and the cleaning brush plate down synchronously. The cleaning brush plate is always on the inner wall of the guide wire head. The downward movement of multiple cleaning brush plates can scrape the inner wall of the guide wire head, cleaning the splashes, burrs and other impurities on the inner wall of the guide wire head, and preventing the internal conveying of the guide wire head from being blocked.

[0017] 3. In this invention, the rotating rods on the outer walls of the first and second transmission gears rotate in opposite directions. Since the rotating rods are in the through groove, the passing welding wire can be further conveyed downwards, so that the welding wire that is far from the force of the wire feeder can be pressed downwards again and conveyed. It can also help reduce the jerking sensation of the welding wire passing through the wire guide head, making the conveying more stable and preventing the welding wire from shaking at the end of the conveying, thus affecting the welding quality.

[0018] 4. In this invention, when multiple first contact guide rods move in a circular motion, the plastic hose and spiral steel wire spring tube will bend and reset repeatedly, shaking off the burrs remaining in the welding wire inside the spiral steel wire spring tube, and further preventing the welding wire from jamming. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the automatic arc welding machine of the present invention; Figure 3 This is a schematic diagram of the main body of the automatic arc welding machine of the present invention from another perspective; Figure 4 This is a schematic diagram of the fixing frame and its surrounding structure according to the present invention; Figure 5 This is a schematic diagram of the fixed frame and its surrounding cross-sectional structure according to the present invention; Figure 6 This is a partial cross-sectional view of the fixed frame structure of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the guide wire head of the present invention; Figure 8 This is a schematic diagram of the first contact guide rod and its surrounding structure according to the present invention.

[0020] In the attached diagram, the components represented by each number are as follows: 1. Welding platform body; 2. First electric slide rail; 3. First guide rod; 4. First sliding seat; 5. Second electric slide rail; 6. Second guide rod; 7. Second sliding seat; 8. Electric telescopic rod; 9. Third guide rod; 10. Lifting seat; 11. Automatic arc welding machine body; 12. Placement table; 13. Wire feeder; 14. Wire inlet tube; 15. Status display screen; 16. Wire outlet tube; 17. Plastic hose; 18. First fixed seat; 19. Fixing bolt; 20. Second fixed seat; 21. Fixing frame; 22. Fixing plate; 23. First 24. Miniature servo motor; 25. First transmission gear; 26. Second transmission gear; 27. Rotating rod; 28. Friction sleeve; 29. ​​Through groove; 20. Second miniature servo motor; 30. Third transmission gear; 31. Transmission gear ring; 32. Guide wire head; 33. Annular groove; 34. First abutting guide rod; 35. First abutting ball; 36. Striking protrusion; 37. Cleaning brush plate; 38. Fixing plate; 39. Return spring; 40. Abutting block; 41. Striking plate; 42. Spiral steel wire spring tube; 43. Second abutting guide rod; 44. Second abutting ball. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention provides a technical solution: such as Figure 1 - Figure 8The illustrated welding device for rail transit vehicle connecting plate accessories includes a welding platform body 1 and an automatic arc welding machine body 11. A wire feeder 13 is fixedly installed on the outer wall of the automatic arc welding machine body 11. A wire outlet tube 16 is fixedly connected to the output end of the wire feeder 13. A spiral steel wire spring tube 42 is fixedly connected to the end of the wire outlet tube 16. A plastic hose 17 is sleeved on the outer wall of the spiral steel wire spring tube 42. A wire guide head 32 is fixedly connected to one end of the plastic hose 17. A second fixing seat 20 is fixedly connected to the outer wall of the wire guide head 32. A fixing frame 21 is fixedly connected to the outer wall of the second fixing seat 20. A second micro servo motor 29 is fixedly installed on the outer wall of the fixing frame 21. A third transmission gear 30 is fixedly connected to the output end of the second micro servo motor 29. A transmission gear ring 31 is meshed with the outer wall of the third transmission gear 30. The transmission gear ring 31 is rotatably connected to the inner wall of the fixing frame 21. A cleaning mechanism for cleaning the wire guide head 32 and the spiral steel wire spring tube 42 is slidably installed on the inner wall of the transmission gear ring 31.

[0023] The cleaning mechanism includes a first abutment guide rod 34, and multiple first abutment guide rods 34 are slidably embedded in the inner wall of the transmission gear ring 31. A fixing plate 38 is fixedly connected to the outer wall of the first abutment guide rod 34. A return spring 39 is sleeved on the first abutment guide rod 34. One end of the return spring 39 is fixedly connected to the outer wall of the fixing plate 38, and the other end of the return spring 39 is fixedly connected to the outer wall of the transmission gear ring 31.

[0024] One end of the first abutting guide rod 34 is rotatably mounted with a first abutting ball 35, and the inner wall of the fixed frame 21 is fixedly connected with a plurality of annularly distributed abutting blocks 40, which are configured as hemispherical blocks.

[0025] The other end of the first abutting guide rod 34 is fixedly connected to a striking plate 41. The outer wall of the striking plate 41 is fixedly connected to a striking protrusion 36 for striking the guide wire head 32. The outer wall of the striking plate 41 is fixedly connected to a cleaning brush plate 37 for cleaning the inner wall of the guide wire head 32. An annular groove 33 is provided on the guide wire head 32, and the first abutting guide rod 34 passes through the annular groove 33.

[0026] A second abutment guide rod 43 is fixedly connected to the outer wall of the plastic hose 17. A second abutment ball 44 is rotatably installed at one end of the second abutment guide rod 43. The movement trajectory of the first abutment guide rod 34 abuts against the second abutment ball 44.

[0027] A fixing plate 22 is fixedly connected to the outer wall of the fixing frame 21. A first micro servo motor 23 is fixedly installed on the outer wall of the fixing plate 22. A first transmission gear 24 is fixedly connected to the output end of the first micro servo motor 23. A second transmission gear 25 is rotatably connected to the outer wall of the fixing plate 22. The first transmission gear 24 and the second transmission gear 25 mesh with each other. A rotating rod 26 is fixedly connected to the outer wall of both the first transmission gear 24 and the second transmission gear 25. A plurality of friction sleeves 27 are fixedly sleeved on the outer wall of the rotating rod 26. The friction sleeves 27 are rubber sleeves.

[0028] Both the plastic hose 17 and the spiral steel wire spring tube 42 are provided with through grooves 28, and the rotating rod 26 is inserted into the through grooves 28.

[0029] The outer wall of the main body 11 of the automatic arc welding machine is fixedly connected to a first fixed seat 18. A plastic hose 17 passes through the first fixed seat 18. Two fixing bolts 19 for limiting the position of the plastic hose 17 are threaded on the first fixed seat 18. A status display screen 15 is fixedly installed on the wire feeder 13. A wire feed tube 14 is fixedly connected to the input end of the main body 11 of the automatic arc welding machine.

[0030] A placement platform 12 is fixedly connected to the main body 1 of the welding platform. A first electric slide rail 2 is fixedly installed on the placement platform 12. A first guide rod 3 is fixedly connected to the first electric slide rail 2. A first sliding seat 4 is fixedly connected to the moving end of the first electric slide rail 2.

[0031] A second electric slide rail 5 is fixedly installed on the outer wall of the first sliding seat 4. A second guide rod 6 is fixedly connected to the second electric slide rail 5. A second sliding seat 7 is fixedly installed at the moving end of the second electric slide rail 5. An electric telescopic rod 8 is fixedly installed on the second sliding seat 7. A third guide rod 9 is fixedly connected to the second sliding seat 7. A lifting seat 10 is fixedly connected to the output end of the electric telescopic rod 8. The main body 11 of the automatic arc welding machine is fixedly installed on the lifting seat 10.

[0032] Working principle: When using the rail transit vehicle connecting plate accessory welding device, the connecting plate accessory to be welded is first placed on the placement platform 12. Since most connecting plate accessories are large in size and weight and difficult to move, no additional position fixing is required during the welding process.

[0033] The first electric slide rail 2 can be activated by control, and the first electric slide rail 2, along with the first sliding seat 4 at the moving end, moves longitudinally along the first guide rod 3, so that the entire body 11 of the automatic arc welding machine can perform longitudinal welding work. The second electric slide rail 5 can be activated by control, and the second electric slide rail 5, along with the second sliding seat 7 at the moving end, moves laterally along the second guide rod 6, so that the entire body 11 of the automatic arc welding machine can perform lateral welding work. When moving the body 11 of the automatic arc welding machine, the electric telescopic rod 8 can be activated, and the electric telescopic rod 8, along with the lifting seat 10, moves upward along the third guide rod 9 to prevent wear on the arc head position of the body 11 of the automatic arc welding machine.

[0034] When welding is performed by the main body 11 of the automatic arc welding machine, the wire feeder 13 needs to continuously feed and straighten the external welding wire. The external welding wire is usually in coil shape. One end of the welding wire enters the wire feeder 13 from the wire inlet tube 14. After being straightened by the wire feeder 13, it continues to be fed and passes out from the wire outlet tube 16 into the spiral steel wire spring tube 42. It is then fed to the fixed frame 21 and the wire guide head 32 along with the bent spiral steel wire spring tube 42, and finally protrudes through the wire guide head 32. Under the combined action of the wire guide head and the arc head part of the main body 11 of the automatic arc welding machine, welding is performed.

[0035] During the welding process, as the welding wire is fed, the first micro servo motor 23 is started. The output end of the first micro servo motor 23 drives the first transmission gear 24 to rotate. When the first transmission gear 24 rotates, it meshes and drives the second transmission gear 25 to rotate. At this time, the first transmission gear 24 and the second transmission gear 25 rotate in opposite directions. At this time, the rotating rod 26 on the outer wall of the first transmission gear 24 and the second transmission gear 25 also rotates in opposite directions. Since the rotating rod 26 is in the through groove 28, the welding wire that has passed through can be further fed downwards, so that the welding wire that is far away from the force of the wire feeder 13 can be pressed downwards again and fed. It can also help reduce the jerking sensation of the welding wire passing through the wire guide head 32, making the feeding more stable and preventing the welding wire from shaking at the end of the feeding, thus affecting the welding quality.

[0036] During the wire feeding process, the second micro servo motor 29 is started. After the second micro servo motor 29 starts, it drives the third transmission gear 30 at the output end to rotate. When the third transmission gear 30 rotates, it meshes with the transmission gear ring 31. The transmission gear ring 31 starts to drive multiple first abutting guide rods 34 to rotate. During the circumferential movement of multiple first abutting guide rods 34, the first abutting ball 35 at its end will intermittently abut against the abutting block 40. When abutting, the first abutting ball 35 causes the first abutting guide rod 34 to move down. The first abutting guide rod 34 causes the fixing plate 38 to move down and compress the reset spring 39. The downward movement of the first abutting guide rod 34 causes the striking plate 41 and the cleaning brush plate 37 to move down synchronously. The cleaning brush plate 37 is always on the inner wall of the wire guide head 32. The downward movement of multiple cleaning brush plates 37 can scrape the inner wall of the wire guide head 32, cleaning the spatter, burrs and other impurities on the inner wall of the wire guide head 32, and preventing the wire guide head 32 from being blocked inside.

[0037] When the first abutting ball 35 releases its contact with the single abutting block 40, the return spring 39 returns to its original position, causing the fixing plate 38 and the first abutting guide rod 34 to move upward. When the first abutting guide rod 34 moves upward, it causes the striking plate 41 and the striking protrusion 36 to move upward simultaneously, so that the striking protrusion 36 moves upward and strikes the end of the guide wire head 32. The striking causes the blockage on the inner wall of the guide wire head 32 to be further dislodged.

[0038] As the multiple first contact guide rods 34 move in a circular motion, their movement trajectory intermittently contacts the outer wall of the second contact ball 44. This contact causes the second contact ball 44, along with the first contact guide rods 34, the plastic hose 17, and the spiral steel wire spring tube 42, to undergo slight deformation and bending. It should be noted that this bending does not affect the internal welding wire feeding. Since there are multiple first contact guide rods 34, the circular movement of these rods causes the plastic hose 17 and the spiral steel wire spring tube 42 to bend and reset repeatedly, shaking off any residual burrs from the welding wire inside the spiral steel wire spring tube 42 and further preventing jamming during welding wire feeding.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for connecting plate accessories of rail transit vehicles, comprising a welding platform body (1) and an automatic arc welding machine body (11), characterized in that: A wire feeder (13) is fixedly installed on the outer wall of the main body (11) of the automatic arc welding machine. A wire outlet tube (16) is fixedly connected to the output end of the wire feeder (13). A spiral steel wire spring tube (42) is fixedly connected to the end of the wire outlet tube (16). A plastic hose (17) is sleeved on the outer wall of the spiral steel wire spring tube (42). A wire guide head (32) is fixedly connected to one end of the plastic hose (17). A second fixing seat (20) is fixedly connected to the outer wall of the wire guide head (32). The outer wall of the second fixing seat (20) is... A fixed frame (21) is fixedly connected, and a second micro servo motor (29) is fixedly installed on the outer wall of the fixed frame (21). A third transmission gear (30) is fixedly connected to the output end of the second micro servo motor (29). A transmission gear ring (31) is meshed with the outer wall of the third transmission gear (30). The transmission gear ring (31) is rotatably connected to the inner wall of the fixed frame (21). A cleaning mechanism for cleaning the guide wire head (32) and the spiral steel wire spring tube (42) is slidably installed on the inner wall of the transmission gear ring (31).

2. The welding device for connecting plate accessories of rail transit vehicles according to claim 1, characterized in that: The cleaning mechanism includes a first abutment guide rod (34), a plurality of first abutment guide rods (34) are slidably embedded in the inner wall of the transmission gear ring (31), a fixing plate (38) is fixedly connected to the outer wall of the first abutment guide rod (34), and a return spring (39) is sleeved on the first abutment guide rod (34). One end of the return spring (39) is fixedly connected to the outer wall of the fixing plate (38), and the other end of the return spring (39) is fixedly connected to the outer wall of the transmission gear ring (31).

3. The welding device for connecting plate accessories of rail transit vehicles according to claim 2, characterized in that: One end of the first abutting guide rod (34) is rotatably mounted with a first abutting ball (35), and the inner wall of the fixed frame (21) is fixedly connected with a plurality of annularly distributed abutting blocks (40), and the abutting blocks (40) are configured as hemispherical blocks.

4. The welding device for connecting plate accessories of rail transit vehicles according to claim 2, characterized in that: The other end of the first abutting guide rod (34) is fixedly connected to a striking plate (41). The outer wall of the striking plate (41) is fixedly connected to a striking protrusion (36) for striking the guide wire head (32). The outer wall of the striking plate (41) is fixedly connected to a cleaning brush plate (37) for cleaning the inner wall of the guide wire head (32). The guide wire head (32) is provided with an annular groove (33), and the first abutting guide rod (34) passes through the annular groove (33).

5. The welding device for connecting plate accessories of rail transit vehicles according to claim 2, characterized in that: The outer wall of the plastic hose (17) is fixedly connected to a second abutment guide rod (43), and a second abutment ball (44) is rotatably installed at one end of the second abutment guide rod (43). The movement trajectory of the first abutment guide rod (34) abuts against the second abutment ball (44).

6. The welding device for connecting plate accessories of rail transit vehicles according to claim 1, characterized in that: A fixing plate (22) is fixedly connected to the outer wall of the fixing frame (21). A first micro servo motor (23) is fixedly installed on the outer wall of the fixing plate (22). A first transmission gear (24) is fixedly connected to the output end of the first micro servo motor (23). A second transmission gear (25) is rotatably connected to the outer wall of the fixing plate (22). The first transmission gear (24) and the second transmission gear (25) mesh with each other. A rotating rod (26) is fixedly connected to the outer wall of both the first transmission gear (24) and the second transmission gear (25). A plurality of friction sleeves (27) are fixedly sleeved on the outer wall of the rotating rod (26). The friction sleeves (27) are rubber sleeves.

7. The welding device for connecting plate accessories of rail transit vehicles according to claim 6, characterized in that: Both the plastic hose (17) and the spiral steel wire spring tube (42) are provided with through grooves (28), and the rotating rod (26) is inserted into the through grooves (28).

8. The welding device for connecting plate accessories of rail transit vehicles according to claim 1, characterized in that: The outer wall of the automatic arc welding machine body (11) is fixedly connected to a first fixed seat (18), the plastic hose (17) passes through the first fixed seat (18), the first fixed seat (18) is threaded with two fixing bolts (19) for limiting the position of the plastic hose (17), the wire feeder (13) is fixedly installed with a status display screen (15), and the input end of the automatic arc welding machine body (11) is fixedly connected to a wire feed tube (14).

9. A welding device for rail transit vehicle connecting plate accessories according to claim 8, characterized in that: The welding platform body (1) is fixedly connected to a placement table (12), a first electric slide rail (2) is fixedly installed on the placement table (12), a first guide rod (3) is fixedly connected on the first electric slide rail (2), and a first sliding seat (4) is fixedly connected to the moving end of the first electric slide rail (2).

10. A welding device for connecting plate accessories of rail transit vehicles according to claim 9, characterized in that: The outer wall of the first sliding seat (4) is fixedly installed with a second electric slide rail (5), a second guide rod (6) is fixedly connected to the second electric slide rail (5), a second sliding seat (7) is fixedly installed at the moving end of the second electric slide rail (5), an electric telescopic rod (8) is fixedly installed on the second sliding seat (7), a third guide rod (9) is fixedly connected to the second sliding seat (7), a lifting seat (10) is fixedly connected to the output end of the electric telescopic rod (8), and the main body (11) of the automatic arc welding machine is fixedly installed on the lifting seat (10).

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